Nuclear Reactor Quotes

The middle class, in any society, plays the role of graphite rods in nuclear reactors: they slow down the reaction and, if it weren't for them, the reactor would explode. A society without a middle class is a society primed for explosion.

But now science is the belief system that is hundreds of years old. And, like the medieval system before it, science is starting not to fit the world any more. Science has attained so much power that its practical limits begin to be apparent. Largely through science, billions of us live in one small world, densely packed and intercommunicating. But science cannot help us decide what to do with that world, or how to live. Science can make a nuclear reactor, but it cannot tell us not to build it. Science can make pesticide, but cannot tell us not to use it. And our world starts to seem polluted in fundamental ways---air, and water, and land---because of ungovernable science.

She'd never set a fantasy in a ski lodge, but she was thinking about it now. She couldn't help it. The man was throwing off pheromones like he was a nuclear reactor at Chernobyl. Sitting so close to ground zero, the fallout was lethal.

Well you know boys, a nuclear reactor is a lot like women. You just have to read the manual and press the right button.

Leo gestured to the empty core. “The syncopator goes here. It’s a multi-access gyro-valve to regulate flow. The dozen glass tubes on the outside? Those are filled with powerful, dangerous stuff. That glowing red one is Lemnos fire from my dad’s forges. This murky stuff here? That’s water from the River Styx. The stuff in the tubes is going to power the ship, right? Like radioactive rods in a nuclear reactor. But the mix ratio has to be controlled, and the timer is already operational.” Leo tapped the digital clock, which now read 65:15. “That means without the syncopator, this stuff is all going to vent into the chamber at the same time, in sixty-five minutes. At that point, we’ll get a very nasty reaction.” Jason and Piper stared at him. Leo wondered if he’d been speaking English. Sometimes when he was agitated he slipped into Spanish, like his mom used to do in her workshop. But he was pretty sure he’d used English.

Science has attained so much power that its practical limits begin to be apparent. Largely through science, billions of us live in one small world, densely packed and intercommunicating. But science cannot help us decide what to do with that world, or how to live. Science can make a nuclear reactor, but it cannot tell us not to build it. Science can make pesticide, but cannot tell us not to use it.

Buying the right computer and getting it to work properly is no more complicated than building a nuclear reactor from wristwatch parts in a darkened room using only your teeth.

There's your problem," Leo announced. Jason scratched his head. "Uh.... what are we looking at?" Leo thought it was pretty obvious, but Piper looked confused too. "Okay," Leo sighed, " you want the full explanation or the short explanation?" "Short," Piper and Jason said in unison. Leo gestured to the empty core. "The syncopator goes here. It's a multi-access gyro-valve to regulate flow. The doxen glass tubes on the outside? Those are filled with powerful,dangerous stuff. That glowing red one is Lemnos fire from my dad's forges. This murky stuff here? That's water from the River Styx. The stuff in the tubes is going to power the ship, right? Like radioactive rods in a nuclear reactor. But the mix ratio has to be controlled, and the timer is already operational.... That means without the syncopator, this stuff is all going to vent into the chamber at the same time, in sixty-five minutes. At that point, we'll get a very nasty reaction." Jason and Piper stared at him. Leo wondered if he'd been speaking English. Sometimes when he was agitated he slipped into Spanish, like his mom used to do in her workshop. But he was pretty sure he'd used English. "Um..." Piper cleared her throat." Could you make the short explanation shorter?" Leo palm-smacked his forehead. "Fine. One hour. Fluids mix. Bunker goes ka-boom. One square mile of forest tuns into a smoking crater." "Oh," Piper said in a small voice. "Can't you just..... turn it off?" "Gee, I didn't think of that!" Leo said. "Let me just hit this switch and - No, Piper. I can't turn it off.

Kodak had a nuclear reactor in the basement

The more automated society gets and the more powerful the attacking AI becomes, the more devastating cyberwarfare can be. If you can hack and crash your enemy’s self-driving cars, auto-piloted planes, nuclear reactors, industrial robots, communication systems, financial systems and power grids, then you can effectively crash his economy and cripple his defenses. If you can hack some of his weapons systems as well, even better.

A nuclear reactor is a proposed "solution" to "the energy problem." But like all big-technological "solutions," this one "solves" a single problem by causing many... A garden, on the other hand, is a solution that leads to other solutions. It is a part of the limitless pattern of good health and good sense.

The first thing you see, covering yards and yards of one wall, is an object that looks like a nickel-plated nuclear reactor, but is really the stove.

the thing i found offensive, the thing i hated about mohican-mountain-makers, gill-netters, poachers, whalehunters, strip-miners, herbicide-spewers, dam-erectors, nuclear-reactor-builders or anyone who lusted after flesh, meat, mineral, tree, pelt and dollar - including, first and foremost, myself - was the smug ingratitude, the attitude that assumed the world and its creatures owed us everything we could catch, shoot, tear out, alter, plunder, devour...and we owed the world nothing in return.

You’re young. Why are you doing this? That’s not a person anymore, that’s a nuclear reactor. You’ll just burn together.” I was like a dog, running after them. I’d stand for hours at their doors, begging and pleading. And then they’d say: “All right! The hell with you! You’re not normal!

It's certainly true that Chernobyl, while an accident in the sense that no one intentionally set it off, was also the deliberate product of a culture of cronyism, laziness, and a deep-seated indifference toward the general population. The literature on the subject is pretty unanimous in its opinion that the Soviet system had taken a poorly designed reactor and then staffed it with a group of incompetents. It then proceeded, as the interviews in this book attest, to lie about the disaster in the most criminal way. In the crucial first ten days, when the reactor core was burning and releasing a steady stream of highly radioactive material into the surrounding areas, the authorities repeatedly claimed that the situation was under control. . . In the week after the accident, while refusing to admit to the world that anything really serious had gone wrong, the Soviets poured thousands of men into the breach. . . The machines they brought broke down because of the radiation. The humans wouldn't break down until weeks or months later, at which point they'd die horribly.

Altogether, 50 million curies of radiation were released by the Chernobyl explosion, the equivalent of 500 Hiroshima bombs. All that was required for such catastrophic fallout was the escape of less than 5 percent of the reactor’s nuclear fuel. Originally it had contained more than 250 pounds of enriched uranium—enough to pollute and devastate most of Europe. And if the other three reactors of the Chernobyl power plant had been damaged by the explosion of the first, then hardly any living and breathing organisms would have remained on the planet.

science is the belief system that is hundreds of years old. And, like the medieval system before it, science is starting not to fit the world any more. Science has attained so much power that its practical limits begin to be apparent. Largely through science, billions of us live in one small world, densely packed and intercommunicating. But science cannot help us decide what to do with that world, or how to live. Science can make a nuclear reactor, but it cannot tell us not to build it. Science can make pesticide, but cannot tell us not to use it. And our world starts to seem polluted in fundamental ways—air, and water, and land—because of ungovernable science.

Hermes is powered by ion engines. They throw argon out the back of the ship really fast to get a tiny amount of acceleration. The thing is, it doesn’t take much reactant mass, so a little argon (and a nuclear reactor to power things)

the origins of the accident lay with those who had designed the reactor and the secret, incestuous bureaucracy that had allowed it to go into operation.

There are many of us here. A whole street. That's what it's called--Chernobylskaya. These people worked at the station their whole lives. A lot of them still go there to work on a provisional basis, that's how they work there now, no one lives there anymore. They have bad diseases, they're invalids, but they don't leave their jobs, they're scared to even think of the reactor closing down. Who needs them now anywhere else? Often they die. In an instant. They just drop--someone will be walking, he falls down, goes to sleep, never wakes up. He was carrying flowers for his nurse and his heart stopped. They die, but no one's really asked us. No one's asked what we've been through. What we saw. No one wants to hear about death. About what scares them. But I was telling you about love. About my love... -- Lyudmila, Ignatenko, wife of deceased fireman, Vasily Ignatenko

It is important to pause to celebrate those victories, no matter how small,' she says, 'because that is what gives you courage to fight the really big battles, the ones you have to fight even though there's no chance of winning.' [Kay Drey on stopping 1 of 2 nuclear reactors from being built]

So, to save time, Sredmash decided to skip the prototype stage entirely: the quickest way to find out how the new reactors would work in industrial electricity generation would be to put them directly into mass production.

I have called this mental defect the Lucretius problem, after the Latin poetic philosopher who wrote that the fool believes that the tallest mountain in the world will be equal to the tallest one he has observed. We consider the biggest object of any kind that we have seen in our lives or hear about as the largest item that can possibly exist. And we have been doing this for millenia. In Pharaonic Egypt, which happens to be the first complete top-down nation-state managed by bureaucrats, scribes tracked the high-water mark of the Nile and used it as an estimate for a future worst-case scenario. The same can be seen in the Fukushima nuclear reactor, which experienced a catastrophic failure in 2011 when a tsunami struck. It had been built to withstand the worst past historical earthquake, with the builders not imagining much worse--and not thinking that the worst past event had to be a surprise, as it had no precedent. Likewise, the former chairman of the Federal Reserve, Fragilista Doctor Alan Greenspan, in his apology to Congress offered the classic "It never happened before." Well, nature, unlike Fragilista Greenspan, prepares for what has not happened before, assuming worse harm is possible.

- "Surely you have considered terrorist activity?" There was another pause. Then the spokesman said, in the quiet tones of someone who has had enough and who is going to quit after this and raise chickens somewhere, "Yes, I suppose we must. All we need to do is find some terrorists who are capable of taking an entire nuclear reactor out of its can while it's running and without anyone noticing. It weighs about a thousand tons and is forty feet high. So they'll be quite strong terrorists. Perhaps you'd like to ring them up, sir, and ask them questions in that supercilious, accusatory way of yours." -- The BBC interviews a nuclear spokesperson (Terry Pratchett & Neil Gaiman, Good Omens)

Soldiers handling reactor graphite by hand shows how uninformed people were in the early days of the clean-up operation.

This positive void coefficient remained a fatal defect at the heart of Atom Mirny-1 and overshadowed the operation of every Soviet water-graphite reactor that followed.

Atomic energy remained part of the world; it is a part of our lives even today, when 56 countries operate 240 nuclear reactors, and more still are used to power nuclear ships and submarines. Yet thanks to the radium girls, whose experiences led directly to the regulation of radioactive industries, atomic power is able to be operated, on the whole, in safety.

But eighteen seconds is a long time in neutron physics—and an eternity in a nuclear reactor with a high positive void coefficient.

....Largely through science, billions of us live in one small world, densely packed and intercommunicating. But science cannot help us decide what to do with that world, or how to live. Science can make a nuclear reactor, but it cannot tell us not to use it. And our world starts to seem polluted in fundamental ways--air, and water, and land--because of ungovernable science.

According to the Tiqqun collective, we have become the innocuous, pliable inhabitants of global urban societies.7 Even in the absence of any direct compulsion, we choose to do what we are told to do; we allow the management of our bodies, our ideas, our entertainment, and all our imaginary needs to be externally imposed. We buy products that have been recommended to us through the monitoring of our electronic lives, and then we voluntarily leave feedback for others about what we have purchased. We are the compliant subject who submits to all manner of biometric and surveillance intrusion, and who ingests toxic food and water and lives near nuclear reactors without complaint. The absolute abdication of responsibility for living is indicated by the titles of the many bestselling guides that tell us, with a grim fatality, the 1,000 movies to see before we die, the 100 tourist destinations to visit before we die, the 500 books to read before we die.

But now,” he continued, “science is the belief system that is hundreds of years old. And, like the medieval system before it, science is starting not to fit the world any more. Science has attained so much power that its practical limits begin to be apparent. Largely through science, billions of us live in one small world, densely packed and intercommunicating. But science cannot help us decide what to do with that world, or how to live. Science can make a nuclear reactor, but it cannot tell us not to build it. Science can make pesticide, but cannot tell us not to use it. And our world starts to seem polluted in fundamental ways—air, and water, and land—because of ungovernable science.” He sighed. “This much is obvious to everyone.

Ideally, every single fission reaction should trigger just one more fission in a neighboring atom, so that each successive generation of neutrons contains exactly the same number as the one before, and the reactor remains in the same critical state.

So, whenever the subject of Iraq came up, as it did keep on doing through the Clinton years, I had no excuse for not knowing the following things: I knew that its one-party, one-leader state machine was modeled on the precedents of both National Socialism and Stalinism, to say nothing of Al Capone. I knew that its police force was searching for psychopathic killers and sadistic serial murderers, not in order to arrest them but to employ them. I knew that its vast patrimony of oil wealth, far from being 'nationalized,' had been privatized for the use of one family, and was being squandered on hideous ostentation at home and militarism abroad. (Post-Kuwait inspections by the United Nations had uncovered a huge nuclear-reactor site that had not even been known about by the international community.) I had seen with my own eyes the evidence of a serious breach of the Genocide Convention on Iraqi soil, and I had also seen with my own eyes the evidence that it had been carried out in part with the use of weapons of mass destruction. I was, if you like, the prisoner of this knowledge. I certainly did not have the option of un-knowing it.

It would be nice to think that the menacing aspects of North Korea were for display also, that the bombs and reactors were Potemkin showcases or bargaining chips. On the plane from Beijing I met a group of unsmiling Texan types wearing baseball caps. They were the 'in-country' team from the International Atomic Energy Agency, there to inspect and neutralize North Korea's plutonium rods. Not a nice job, but, as they say, someone has to do it. Speaking of the most controversial reactor at Yongbyon, one of the guys said, 'No sweat. She's shut down now.' Nice to know. But then, so is the rest of North Korean society shut down—animation suspended, all dead quiet on the set, endlessly awaiting not action (we hope) or even cameras, but light.

Submarines are the worst. Even the largest feel cramped. The last time I was aboard one, we weren’t even allowed to work out. The gym was located on the other side of the nuclear reactor from our quarters, and we weren’t authorized to pass through the reactor area to get there. Aircraft carriers are a hell of a lot larger, but they can be just as boring. At least they have lounges where you can play video games and there are no restrictions on getting to the gym to blow off steam. In fact, on one occasion, we were specifically requested to go to the gym by the CO. We were on the Kitty Hawk when they were having a problem with gangs. Apparently, some punk sailors who were gang members were causing quite a discipline problem aboard ship. The CO of the boat pulled us over and told us when the gang used the gym. So we went down to work out, locked the door behind us, and fixed the gang problem.

Nassim Taleb writes in his book Fooled By Randomness: In Pharaonic Egypt … scribes tracked the high-water mark of the Nile and used it as an estimate for a future worst-case scenario. The same can be seen in the Fukushima nuclear reactor, which experienced a catastrophic failure in 2011 when a tsunami struck. It had been built to withstand the worst past historical earthquake, with the builders not imagining much worse—and not thinking that the worst past event had to be a surprise, as it had no precedent. This is not a failure of analysis. It’s a failure of imagination. Realizing the future might not look anything like the past is a special kind of skill that is not generally looked highly upon by the financial forecasting community. At a 2017 dinner I attended in New York, Daniel Kahneman was asked how investors should respond when our forecasts are wrong. He said: Whenever we are surprised by something, even if we admit that we made a mistake, we say, ‘Oh I’ll never make that mistake again.’ But, in fact, what you should learn when you make a mistake because you did not anticipate something is that the world is difficult to anticipate. That’s the correct lesson to learn from surprises: that the world is surprising.

By December, the Americans had caught up with the Germans and passed them with a self-sustaining chain reaction. Security was so tight, the Germans did not even know they had been beaten. At the end of the war, their only accomplishment had been the world’s first nuclear reactor accident, caused by water leaking past an inadequate gasket.

All this attempt to control... We are talking about Western attitudes that are five hundred years old... The basic idea of science - that there was a new way to look at reality, that it was objective, that it did not depend on your beliefs or your nationality, that it was rational - that idea was fresh and exciting back then. It offered promise and hope for the future, and it swept away the old medieval system, which was hundreds of years old. The medieval world of feudal politics and religious dogma and hateful superstitions fell before science. But, in truth, this was because the medieval world didn't really work any more. It didn't work economically, it didn't work intellectually, and it didn't fit the new world that was emerging... But now... science is the belief system that is hundreds of years old. And, like the medieval system before it, science is starting to not fit the world any more. Science has attained so much power that its practical limits begin to be apparent. Largely through science, billions of us live in one small world, densely packed and intercommunicating. But science cannot help us decide what to do with that world, or how to live. Science can make a nuclear reactor, but it can not tell us not to build it. Science can make pesticide, but cannot tell us not to use it. And our world starts to seem polluted in fundamental ways - air, and water, and land - because of ungovernable science... At the same time, the great intellectual justification of science has vanished. Ever since Newton and Descartes, science has explicitly offered us the vision of total control. Science has claimed the power to eventually control everything, through its understanding of natural laws. But in the twentieth century, that claim has been shattered beyond repair. First, Heisenberg's uncertainty principle set limits on what we could know about the subatomic world. Oh well, we say. None of us lives in a subatomic world. It doesn't make any practical difference as we go through our lives. Then Godel's theorem set similar limits to mathematics, the formal language of science. Mathematicians used to think that their language had some inherent trueness that derived from the laws of logic. Now we know what we call 'reason' is just an arbitrary game. It's not special, in the way we thought it was. And now chaos theory proves that unpredictability is built into our daily lives. It is as mundane as the rain storms we cannot predict. And so the grand vision of science, hundreds of years old - the dream of total control - has died, in our century. And with it much of the justification, the rationale for science to do what it does. And for us to listen to it. Science has always said that it may not know everything now but it will know, eventually. But now we see that isn't true. It is an idle boast. As foolish, and misguided, as the child who jumps off a building because he believes he can fly... We are witnessing the end of the scientific era. Science, like other outmoded systems, is destroying itself. As it gains in power, it proves itself incapable of handling the power. Because things are going very fast now... it will be in everyone's hands. It will be in kits for backyard gardeners. Experiments for schoolchildren. Cheap labs for terrorists and dictators. And that will force everyone to ask the same question - What should I do with my power? - which is the very question science says it cannot answer.

Adding a proper pressure vessel, built to the standards and complexity required by the RBMK design, was estimated to double the cost of each reactor.

To Rickover the titles and organization charts meant nothing; only the realities of responsibility mattered.45

A neutron pulse surged through the dying reactor, and thermal power peaked at more than 12 billion watts.

operators in the control room often had no idea to what extent the reactors were being cooled, or if they were being cooled at all.

This is the Supernova," he said. "Any time he gets worked up, his body bursts into white-hot light that disintegrates anything around him. That's how I felt when I was growing up. Everything I had inside of me, I just wanted to turn loose. Felt like my heart had a nuclear reactor melting down inside of it. That's how you feel when you're young and you want everything.

Don’t call these the “wonders of Soviet heroism" when you write about it. Those wonders really did exist. But first there had to be incompetence, negligence, and only after those did you get wonders: covering the embrasure, throwing yourself in front of a machine gun. But that those orders should never have been given, that there shouldn’t have been any need, no one writes about that. They flung us there, like sand onto the reactor. Every day they’d put out a new “Action Update": “men are working courageously and selflessly," “we will survive and triumph.

Continuing the experiment after falling to such a low power level resulted in the reactor becoming unstable enough to explode, and Dyatlov holds all the blame for this one crucial decision.

It’s insane, but no more insane than Japan shutting down its entire nuclear reactor fleet in the middle of a heat wave because an extreme tsunami washed over one plant, or the USA invading a noninvolved Middle Eastern nation because a gang of crazies from somewhere else knocked down two skyscrapers. In a sufficiently large crisis, sane and measured responses go out the window.

Steam pressure inside the sealed reactor space rose exponentially—eight atmospheres in a second—heaving Elena, the two-thousand-tonne concrete-and-steel upper biological shield, clear of its mountings and

If you’re a novice in Cyberspace, you may think that buying a computer is a scary and confusing process. But the truth is that if you take a little time to learn a few basic principles and some of the technical lingo, buying the right computer and getting it to work properly is no more complicated than building a nuclear reactor from wristwatch parts in a darkened room using only your teeth. So let’s get started!

Largely through science, billions of us live in one small world, densely packed and intercommunicating. But science cannot help us decide what to do with that world, or how to live. Science can make a nuclear reactor, but it cannot tell us not to build it. Science can make pesticide, but cannot tell us not to use it. And our world starts to seem polluted in fundamental ways—air, and water, and land—because of ungovernable science.

The RBMK was so large that reactivity in one area of the core often had only a loose relationship to that in another. The operators had to control it as if it were not a single unit but several separate reactors in one.

We're an odd match. Imagine Ronald Reagan and Jesse Jackson; imagine night and day. George has built nuclear reactors and believes in them fiercely. We stay away from this and other subjects the way I'd stay away from Three Mile Island. After all, I have plenty of friends who share my most impassioned opinions; we can have an orgy of agreement any day at the natural foods restaurant, over a sprout sandwich. But he's the one out here helping.

Vladimir Shevchenko, a filmmaker from Kiev, died within a year of filming harrowing roof-top footage of the ruined reactor and Bio-robots entirely without protection. His cameras became so radioactive they had to be buried.

The automatic safety systems would have, under normal circumstances, shut the reactor down a few times by now. At 01:22:30, minutes from disaster, Toptunov noticed the computer readings demanding that the reactor be shut down.

The lineage of agriculture is a lineage of humans rearranging plant DNA. For a very long time, crossbreeding was the preferred method, but then came Mendel and his peas. As we began to understand how genetics worked, scientists tried all kinds of wild techniques to induce mutations. We dipped seeds in carcinogens and bombarded them with radiation, occasionally inside of nuclear reactors. There are over 2,250 of these mutants around; most of them are certified

The simplest form of nuclear reactor requires no equipment at all. If the right quantity of uranium 235 is gathered in the presence of a neutron moderator—water, for example, or graphite, which slows down the movement of the uranium neutrons so that they can strike one another—a self-sustaining chain reaction will begin, releasing molecular energy as heat. The ideal combination of circumstances required for such an event—a criticality—has even aligned spontaneously in nature: in ancient subterranean deposits of uranium found in the African nation of Gabon, where groundwater acted as a moderator. There, self-sustaining chain reactions began underground two billion years ago, producing modest quantities of heat energy—an average of around 100 kilowatts, or enough to light a thousand lightbulbs—and continued intermittently for as long as a million years, until the available water was finally boiled away by the heat of fission.

Despite the growing atmosphere of alarm among the physicists at the burning reactor, the government commission and the Politburo remained determined to conceal the news of a possible meltdown from the world beyond the thirty-kilometer zone.

The principal concern of a nuclear reactor - particularly an RBMK reactor, because of its graphite moderator - is that cooling water continuously flows into the core. Without it there could be an explosion or meltdown. Even if the reactor is shut down, the fuel within will still be generating decay heat, which would damage the core without further cooling. Pumps driving the flow of water rely on electricity generated by the plant’s own turbines, but in the event of a blackout the electrical supply can be switched to the national grid. If that fails, diesel generators on site will automatically start up to power the water pumps, but these take about 50 seconds to gather enough energy to operate the massive pumps. There are six emergency tanks containing a combined 250 tons of pressurised water which can be injected into the core within 3.5 seconds, but an RBMK reactor needs around 37,000 tons of water per hour - 10 tons-per-second - so 250 tons does not cover the 50 second gap.92

Clovenhoof had orchestrated great plans and co-ordinated many minions in the pursuit of a single goal before. And getting demons to work together was like trying to herd cats. However, getting six year olds to do the right thing at the right time was like trying to herd neutrons in a nuclear reactor. They simply had too much energy. Before the morning was out, he had composed several angry letters to parents in his head on the subject of sugary cereal and snacks and why they should be replaced with a diet of gruel.

IAEA experts revealed at last the true magnitude of the technical cover-up surrounding the causes of the disaster: the long history of previous RBMK accidents, the dangerous design of the reactor, its instability, and the way its operators had been misled about its behavior. In

Enriched uranium dissolved in water or an organic solvent will become an active nuclear reactor, increasing in power, if a specific “critical mass” is accumulated. The hydrogen in the water or the solvent acts as a moderator, slowing the fission neutrons to an advantageous speed, and even a fairly low U-235 enrichment level, like 3%, will overcome neutron losses by non-productive absorption in the moderator. This has been realized since the earliest days of reactor engineering, and those who work with uranium solutions are quite aware of the possibility.

A government commission into the accident found serious faults with the design, and in 1976 recommended that the void coefficient be lowered, the control rod design be altered, and for ‘fast-acting emergency protection’ to be installed. New designs were drawn up for the rods, but were never installed on any reactors.

Steam pressure inside the sealed reactor space rose exponentially—eight atmospheres in a second—heaving Elena, the two-thousand-tonne concrete-and-steel upper biological shield, clear of its mountings and shearing the remaining pressure tubes at their welds. The temperature inside the reactor rose to 4,650 degrees centigrade—not quite as hot as the surface of the sun.

I don’t believe a word of the whole thing,” said Heisenberg upon hearing the news. “I don’t believe it has anything to do with uranium.” Hahn jeered, “If the Americans have a uranium bomb then you’re all second raters. Poor old Heisenberg.” After they heard the BBC report the news in great detail later that night, Heisenberg and the others accepted the truth: they had been beaten. Over the next few days, Heisenberg attempted to work out how his project had fallen so far behind; his fumbling calculations show that he had never really understood how to even build a bomb in the first place, though he had certainly thought he’d understood it. And the bickering of the other scientists at Farm Hall confirmed what documents captured by Alsos had already suggested: the Nazi bomb program, unlike the Manhattan Project, was a disorganized mess, with vital information compartmentalized and no clear vision of how to proceed. Yet, in those same few days, the Farm Hall transcripts make it clear that Heisenberg and his student, Carl von Weizsäcker, purposefully constructed a revisionist narrative of their wartime activities. According to them, while the Americans had built a weapon of death and destruction on unprecedented scales, they, the Germans, had deliberately pursued only a nuclear reactor, being unwilling to build a massive new weapon for Hitler’s Reich—thereby placing the responsibility for their failure on their supposed moral clarity, rather than their sheer incompetence.

develop new safety regulations to protect them in the event of coolant loss; analyze what would happen in the event of a sharp rise in steam in the core; and devise a faster-acting emergency protection system. Despite their apparent urgency, the reactor designers failed to act on a single one of these directives, and Moscow promptly ordered more of the reactors to be built.

during the start-up of the first reactor at the Balakovo plant in Russia, a relief valve burst, and superheated steam at 300 degrees centigrade escaped into the annular compartments surrounding the reactor well. Fourteen men were boiled alive. Both incidents were concealed, and word reached the operators at other stations only through the atomshchiki rumor mill and hints in Pravda.

More than seven years after the Japanese disaster, the United States still had a hundred licensed and operational power reactors—including one at Three Mile Island. France continued to generate 75 percent of its electricity from nuclear plants, and China had recently embarked on a reactor building spree, with twenty new units under construction and thirty-nine already in operation.

Imagine a rotating sphere that is 8,000 miles in diameter, with a bumpy surface, surrounded by a 25-mile-deep mixture of different gases whose concentrations vary both spatially and over time, and heated, along with its surrounding gases, by a nuclear reactor 93 million miles away. Imagine also that this sphere is revolving around the nuclear reactor and that some locations are heated more during parts of the revolution. And imagine that this mixture of gases receives continually inputs from the surface below, generally calmly but sometimes through violent and highly localized injections. Then, imagine that after watching the gaseous mixture you are expected to predict its state at one location on the sphere one, two, or more days into the future. This is essentially the task encountered day by day by a weather forecaster.

Legasov went further still. Turning his back on every political orthodoxy he had believed in since he was a teenager, the academician said that Soviet science had lost its way. The men and women behind the great triumphs of Soviet technology—who had created the first nuclear power plant and launched Yuri Gagarin into space—had been striving for a new and better society and acted with a morality and strength of purpose inherited from Pushkin and Tolstoy. But the thread of virtuous purpose had run through their fingers, leaving behind a generation of young people who were technologically sophisticated but morally untethered. It was this profound failure of the Soviet social experiment, and not merely a handful of reckless reactor operators, that Legasov believed was to blame for the catastrophe that had bloomed from Reactor Number Four.

The first port of call was the Americans. In 1974, an initial agreement was reached by which the US agreed to sell two reactors, as well as enriched uranium, to Iran. The scope of the arrangement was expanded further in 1975, when a $15 billion trade deal was agreed between the two countries, which included provision for Iran to purchase eight reactors from the United States at a fixed price of $6.4 billion.55 The following year, President Ford approved a deal that allowed Iran to buy and operate a US-built system that included a reprocessing facility that could extract plutonium from nuclear reactor fuel, and therefore enable Teheran to operate a ‘nuclear fuel cycle’. President Ford’s Chief of Staff had no hesitation in approving this sale: in the 1970s, Dick Cheney did not find it difficult to ‘figure out’ what Iran’s motivations were.

The missiles would be packed full of fissionable material, and fission scared her nearly as much as antimatter. It was the dirty, nasty form of nuclear energy. Shut down a fusion reactor, and the only radioactive materials left were those that had been made radioactive by neutron bombardment. Shut down a fission reactor, and you had a deadly, possibly explosive pile of unstable elements with a half-life that meant they would stay hazardous for thousands of years.

Within 4 seconds, the reactor’s energy output had soared to several times its intended capacity. Runaway heat and pressure deep inside the core ruptured fuel channels, then water pipes, causing the pumps’ automatic safety valves to close. This stopped the flow of coolant, increasing the rate at which steam was forming from the core’s diminishing water supply. The reactor’s own safety valves attempted to vent the steam, but the pressure was too great and they, too, ruptured.

It is not well known that there was a severe accident at Chernobyl before the disaster of 1986, which resulted in the partial core meltdown of Unit 1. The incident occurred on September 9th, 1982, and remained secret for several years afterwards. Detailed and reliable reports are difficult to come by (especially in English), but it seems a coolant water control valve was closed, leading to overheating of a water channel and partial damage of the fuel assembly and graphite inside the reactor.

Our case was straightforward: The deal prevented Iran from getting a nuclear weapon. The Iranians had to remove two-thirds of their centrifuges, couldn’t use their more advanced centrifuges, and had to get rid of 98 percent of their stockpile. They had to convert a heavy water reactor so it couldn’t produce plutonium. Inspectors would have 24/7 access to Iran’s nuclear facilities, and the ability to access Iran’s entire nuclear supply chain—from uranium mines and mills to centrifuge manufacturing and storage facilities. To cheat, Iran wouldn’t just need a nuclear facility like Natanz or Fordow—they’d have to run an entirely secret supply chain. If they cheated, sanctions would snap back into place. Then there were the consequences of not having the deal. Without it, Iran could quickly advance its nuclear program to the point of having enough material for a bomb. That would leave us with a choice between bombing their facilities and acquiescing to a nuclear-armed Iran. Holding out for a better deal was not going to work. It was diplomacy or war.

The radiation in Chernobyl’s Unit 4 reactor hall was now at an instantly-lethal 30,000 roentgens-per-hour. 500 roentgens, received over the course of 5 hours, is a fatal dose. 400 is fatal in 50% of victims. Anything even approaching that will hospitalise you for months if you’re lucky, or cripple you if you aren’t. The volume and intensity of radioactive particles thrown into the atmosphere on that night was equal to 10 Hiroshima bombs, not including the hundreds of tons of reactor fuel and graphite that landed all over the plant.

Rolf Ekeus came round to my apartment one day and showed me the name of the Iraqi diplomat who had visited the little West African country of Niger: a statelet famous only for its production of yellowcake uranium. The name was Wissam Zahawi. He was the brother of my louche gay part-Kurdish friend, the by-now late Mazen. He was also, or had been at the time of his trip to Niger, Saddam Hussein's ambassador to the Vatican. I expressed incomprehension. What was an envoy to the Holy See doing in Niger? Obviously he was not taking a vacation. Rolf then explained two things to me. The first was that Wissam Zahawi had, when Rolf was at the United Nations, been one of Saddam Hussein's chief envoys for discussions on nuclear matters (this at a time when the Iraqis had functioning reactors). The second was that, during the period of sanctions that followed the Kuwait war, no Western European country had full diplomatic relations with Baghdad. TheVatican was the sole exception, so it was sent a very senior Iraqi envoy to act as a listening post. And this man, a specialist in nuclear matters, had made a discreet side trip to Niger. This was to suggest exactly what most right-thinking people were convinced was not the case: namely that British intelligence was on to something when it said that Saddam had not ceased seeking nuclear materials in Africa. I published a few columns on this, drawing at one point an angry email from Ambassador Zahawi that very satisfyingly blustered and bluffed on what he'd really been up to. I also received—this is what sometimes makes journalism worthwhile—a letter from a BBC correspondent named Gordon Correa who had been writing a book about A.Q. Khan. This was the Pakistani proprietor of the nuclear black market that had supplied fissile material to Libya, North Korea, very probably to Syria, and was open for business with any member of the 'rogue states' club. (Saddam's people, we already knew for sure, had been meeting North Korean missile salesmen in Damascus until just before the invasion, when Kim Jong Il's mercenary bargainers took fright and went home.) It turned out, said the highly interested Mr. Correa, that his man Khan had also been in Niger, and at about the same time that Zahawi had. The likelihood of the senior Iraqi diplomat in Europe and the senior Pakistani nuclear black-marketeer both choosing an off-season holiday in chic little uranium-rich Niger… well, you have to admit that it makes an affecting picture. But you must be ready to credit something as ridiculous as that if your touching belief is that Saddam Hussein was already 'contained,' and that Mr. Bush and Mr. Blair were acting on panic reports, fabricated in turn by self-interested provocateurs.

from a distance of 50 miles, were brought down in 10 seconds by demolition explosives, and that was that. The fuel-reprocessing industry in the UK has reported only one criticality accident in which fissile material managed to come together accidentally in a supercritical configuration. Just about every other country that has tried to separate plutonium from uranium in spent reactor fuel has experienced at least one such excursion, and this was Britain’s. This incident at the Windscale Works on August 24, 1970, is described by the criticality review committee at

In late 1983, Lithuania’s brand new Ignalina Power Station began commission testing its first RBMK reactor and soon encountered a problem: control rods entering the reactor together caused a power surge. This is basically what caused the Chernobyl disaster a few years later. At Ignalina, the fuel was brand new, the reactor was stable, and the rods travelled down the entire height of the core, allowing boron to be introduced and the reaction to be brought back under control. This critical discovery was passed around the relevant nuclear Ministries and Institutes, but again nothing changed.

Just after 1am on April 26th, 1986, a test was about to commence at Chernobyl’s Unit 4 reactor. What followed was the worst nuclear disaster in history. That night, the shift comprised of 176 men and women at the plant, along with 286 construction workers building Unit 5, a few hundred meters to the southeast. Unit 4’s control room operators, along with a representative of Donenergo - the state-owned electricity supplier and designer of the plant’s turbines - were testing a safety feature intended to allow the Unit to power itself for around a minute in the event of a total power failure.

Either way, even 30MWt is near-as-makes-no-difference a complete shutdown and not even enough energy to power the water pumps. At such a low power, an atomic process of ‘poisoning’ the reactor begins - a release of the isotope xenon135, which absorbs and seriously inhibits the fission reaction - and the test was over before it began. Had this massive drop in power never happened, the test would have proceeded without incident and the RBMK’s dangerous shortcomings may never have come to light. Crucially, however, the man in charge of the test, 55-year-old Deputy-Chief Engineer Anatoly Dyatlov, did not stop.

The academician had returned home from Chernobyl for the second time, on May 13, a changed man, his hands and face darkened by a radioactive tan, his ideological confidence shaken.16 With tears in his eyes, he described to his wife how overwhelmed they had been by the accident, how unprepared they were to protect the Soviet people from its consequences: the lack of clean water, uncontaminated food, and stable iodine. An examination at Hospital Number Six revealed the toxic fingerprint of the reactor deep within Legasov’s body: doctors found fission products, including iodine 131, cesium 134 and 137, tellurium 132, and ruthenium 103, in his hair, airways, and lungs.

There was, apparently, a nuclear reactor at a place called Indian Point, just thirty miles away in Westchester County. If something bad happened there, we were constantly being informed, the 'radioactive debris', whatever this might be, was liable to rain down on us. (Indian Point: the earliest, most incurable apprehensions stirred in its very name.) Then there was the question of dirty bombs. Apparently any fool could build a dirty bomb and explode it in Manhattan. How likely was this? Nobody knew. Very little about anything seemed intelligible or certain, and New York itself - that ideal source of the metropolitan diversion that serves as a response to the largest futilities - took on a fearsome, monstrous nature whose reality might have befuddled Plato himself. We were trying, as I irreverently analysed it, to avoid what might be termed a historic mistake. We were trying to understand, that is, whether we were in a pre-apocalyptic situation, like the European Jews in the thirties or the last citizens of Pompeii, or whether our situation was merely near-apocalyptic, like that of the Cold War inhabitants of New York, London, Washington and, for that matter, Moscow. In my anxiety I phoned Rachel's father, Charles Bolton, and asked him how he'd dealt with the threat of nuclear annihilation. I wanted to believe that this episode of history, like those old cataclysms that deposit a geologically telling layer of dust on the floors of seas, had sooted its survivors with special information.

Nuclear power is a permanent disaster. Producing its uranium fuel is an environmental disaster - now tucked and folded over the horizon in mostly-poor countries where miners are paid $5 a day and unprotected against radiation. Building reactors is a financial disaster, always shifted to government subsidies. Waste disposal is both an environmental and economic disaster. When the fateful time comes to decommission the Doomsday Machines, after the easy 10-year life extensions run out, this is another economic disaster. But when a reactor becomes what it really is - the most massive Dirty Bomb you or Bin Laden (radhi Allah anhu) can imagine - the nuclear disaster will be hard to yank out of the media, quicktime, and carry on like nothing ever happened.

Then at 00:28, while reducing power to levels low enough to begin - a process which would take about an hour - Senior Reactor-Control Engineer Leonid Toptunov made a mistake when switching from manual to automatic control, causing the control rods to descend far more than intended.99 Toptunov had only been in his current position for a few months, during which the reactor power had never been reduced.100 Perhaps his nerves got the better of him. Power levels - supposed to be held at 1,500-Megawatts thermal (MWt) for the test - dropped all the way to 30MWt. (The reactor’s output is measured in terms of thermal power - the turbogenerator’s in electrical power. Energy is lost during the transfer from steam to electricity, hence the higher thermal figures.)

Fukushima, Japan. The disaster involving the three General Electric–built reactors on the northeastern coast of Honshu followed a now familiar course, this time played out live on television: a loss of coolant led to reactor meltdown, a dangerous buildup of hydrogen gas, and several catastrophic explosions. No one was killed or injured by the immediate release of radiation, but three hundred thousand people were evacuated from the surrounding area, which will remain contaminated for decades to come. During the early stages of the emergency cleanup, it became clear that robots were incapable of operating in the highly radioactive environment inside the containment buildings of the plant. Japanese soldiers were sent in to do the work, in another Pyrrhic victory of bio-robots over technology.

Fifty tons of vaporised nuclear fuel were thrown into the atmosphere, destined to be carried away in a poisonous cloud that would spread across most of Europe. The mighty explosion ejected a further 700 tons of radioactive material - mostly graphite - from the periphery of the core, scattering it across an area of a few square kilometers. This included the roofs of the turbine hall, Unit 3, and the ventilation stack it shared with Unit 4, all of which erupted into flames. The reactor fuel’s extreme temperature, combined with air rushing into the gaping hole, ignited the core’s remaining graphite and generated an inferno that burned for weeks. Most lights, windows and electrical systems throughout the severely damaged Unit 4 were blown out, leaving only a smattering of emergency lighting to provide illumination.124

Regardless, at 01:23:40 on April 26th, 1986, 32-year-old Alexander Akimov made his fateful decision and announced that he was pressing the EPS-5 emergency safety button to initiate a SCRAM, causing all remaining control rods to begin their slow descent into the core.116 It117 was a decision that would change the course of history. An emergency shutdown was Akimov’s obvious choice. A large part of the reason why the core was so unstable was that almost all 211 rods had been removed, after all, leaving him and his colleagues with very little control over the reactor. He may even - if the stories of Toptunov shouting to him are true - have considered this to be his only choice, given how many safety systems had been disabled. Alas, it was, in fact, the worst thing he could have done. Within seconds, the control rods stopped moving.

Following his fall from power, Mikhail Gorbachev set up a charitable foundation and think tank based in Moscow and struggled to remain influential in Russian politics. In 1996, he ran for president of the Russian Federation but won less than 1 percent of ballots counted. He would later insist that it was the explosion of Reactor Number Four—and not his own bungled reforms—that proved the catalyst in the destruction of the Union he had so desperately wished to preserve. In April 2006, he wrote: “The nuclear meltdown at Chernobyl twenty years ago this month, even more than my launch of perestroika, was perhaps the real cause of the collapse of the Soviet Union five years later. Indeed, the Chernobyl catastrophe was an historic turning point: there was the era before the disaster, and there is the very different era that has followed.

At 01:23:04, turbine 8 was disconnected and began to coast down.114 The operators still had no idea what was about to happen and began a calm discussion, remarking that the reactor’s task was complete and they could start to shut it down.115 Exactly what happened next is not 100% clear. Dyatlov claimed afterwards that the test proceeded as normal with no problems and that Akimov pressed the EPS-5 emergency safety button simply to shut down the reactor at the test’s conclusion as planned. Others said there were shouts and that Akimov pressed it after Toptunov saw readings on his control board that indicated a serious problem. Though reactivity increased slightly as the turbine speed dropped, some reports and simulations have concluded that no strange phenomena occurred prior to pressing the button and that all readings, under the circumstances, were normal.

The disaster at the Chernobyl plant, along with the war in Afghanistan and the cruise-missile question, is generally seen today as the start of the decline of the Soviet Union. Just as the great famine of 1891 had mercilessly laid bare the failure of czarism, almost a century later Chernobyl clearly showed how divided, rigid and rotten the Soviet regime had become. The principal policy instruments, secrecy and repression, no longer worked in a modern world with its accompanying means of communication. The credibility of the party leadership sank to the point at which it could sink no further. In the early hours of 26 April, 1986, two explosions took place in one of the four reactors at the giant nuclear complex. It was an accident of the kind scientists and environmental activists had been warning about for years, particularly because of its effects: a monstrous emission of iodine-131 and caesium-137. Huge radioactive clouds drifted across half of Europe:

To make matters worse, Unit 4 was at the end of a fuel cycle. One of the features of the RBMK design is ‘online refuelling’, which is the ability to swap out spent fuel while the reactor is at power. Because fuel burn-up is not even throughout the core, it was not uncommon for the reactor to contain both new and old fuel, which was usually replaced every two years. On April 26th, around 75% of the fuel was nearing the end of its cycle.95 This old fuel had, by now, been given time to accumulate hot and highly radioactive fission products, meaning any interruption in the flow of cooling water could quickly damage the older fuel channels and generate heat faster than the reactor was designed to cope with. Unit 4 was scheduled for a lengthy shutdown and annual maintenance period upon conclusion of the test, during which all of the old fuel would be replaced. It would have been far more sensible to conduct the test with fresh fuel, but management decided to push ahead anyway.

The test would involve inserting all 211 control rods part-way, creating a power level low enough to resemble a blackout while continuing to cool the reactor to compensate for fission products. Use the residual steam in the system to drive a turbine, then isolate it and allow it to run down, generating electricity through its own inertia. The electrical output would be measured, allowing engineers to determine whether it was sufficient to power the water pumps in an emergency. Because the deliberately low power levels would appear to be a power failure to the control computer, which would then automatically activate the safety systems, these systems, including the backup diesel generators and Emergency Core Cooling System (ECCS), were disconnected in order to re-attempt the test straight away if it proved unsuccessful. Otherwise, the ECCS would automatically shutdown the reactor, preventing a repeat of the test for another year. Astonishingly, these measures were not in violation of safety procedures when approved by a Deputy Chief Engineer, despite many subsequent reports to the contrary.96

Akimov didn’t understand what was happening either. He, like the other poor operators in the control room, was unaware of a devastating fatal flaw in the reactor’s design. While around 5 meters of each control rod was composed of the neutron-absorbing element boron to halt the reaction, the ends of each rod were made of graphite - the same reaction-increasing moderator as was used throughout the core of the RBMK. Between the graphite and boron was a long hollow section. The purpose of the graphite tips was to displace cooling water (which is also a moderator, albeit weaker than graphite) in the rod’s path, thus increasing the boron’s dampening effect on the fuel.119 The moment all those graphite tips began to move inside the reactor, there was a surge in positive reactivity in the lower half of the core, resulting in a huge increase in heat and steam production. This heat fractured part of the fuel assembly, distorting the control rod channels and preventing their smooth travel through the core. When a control rod is fully inserted, the tip extends below the core, but now over 200 were lodged in the centre.

The main circulating pumps began to cavitate and fill with steam, reducing the flow of valuable cooling water and allowing steam voids (pockets of steam where there should be water) to form in the core. A positive void coefficient was occurring: the absence of cooling water causing an exponential power increase. In simple terms, more steam = less water = more power = more heat = more steam. Because 4 of the 8 water pumps were running off the decelerating turbine, less and less water was supplied to the reactor as power increased. Throughout the building, ‘knocks’ were heard from the direction of the main reactor hall. Akimov’s control board indicated that the rods hadn’t moved far before freezing, only 2.5 meters from their raised position. Thinking quickly, he released the clutch on their servomotors to allow the heavy rods to fall into the core under their own weight, but they didn’t move: jammed. “I thought my eyes were coming out of my sockets. There was no way to explain it,” recalled Dyatlov, six years later. “It was clear that this was not a normal accident, but something much more terrible. It was a catastrophe.”118

As their white blood cell counts collapsed, infection crawled across the skin of the young operators and firemen: Thick black blisters of herpes simplex encrusted their lips and the inside of their mouths. Candida rendered their gums red and lacy, and the skin peeled back, leaving them the color of raw meat. Painful ulcers developed on their arms, legs, and torsos, where they had been burned by beta particles. Unlike thermal burns caused by heat alone, which heal slowly over time, radiation burns grow gradually worse—so their external beta burns expanded outward in waves from wherever radioactive material had touched them and ate into the tissue below. The men’s body hair and eyebrows fell out, and their skin darkened—first red, then purple, before finally it became a papery brown-black and curled away in sheets. Inside their bodies, the gamma radiation ate away the lining of their intestines and corroded their lungs. Anatoly Kurguz, who had fought to close the airlock door to the reactor hall in the moments after the explosion and was enveloped in steam and dust, had so much cesium inside his body that he became a dangerous source of radiation. He

The accident bears some remarkable similarities to Chernobyl’s 1986 disaster. Leningrad’s Unit 1 was restarting after routine maintenance and had reached 800MW when operators disconnected one of its two turbines due to a fault. To keep the reactor stable, power was reduced to 500MW and then the evening shift handed over the reins to the night shift. At 2am, someone in the control room disconnected the only remaining turbine by accident, tripping the emergency computer system and automatically shutting down the reactor. Reactor poisoning began (I’ll explain this in more detail later), leaving the operators with a choice of battling the reactor back to full power or allowing it to shut down, but there would be repercussions for allowing it to happen at all. They chose - just as at Chernobyl over a decade later - to raise the power. It didn’t go well. “During rising to power after shutdown, without any operator’s actions to change reactivity (without lifting any rods) the reactor would suddenly reduce acceleration time by itself, i.e., inadvertently accelerate; in other words, it would try to explode,” says V. I. Boretz, a trainee from Chernobyl who happened to be on this shift.

By 01:00, after around half an hour, the pair had succeeded in increasing the power to 200MWt by retracting about half of the control rods, but that was as high as it would go - nowhere near the intended 700MWt. Xenon poisoning had already taken its toll, seriously reducing the fuel’s reactivity. Russian safety regulations have since changed to require that an RBMK reactor be kept at a minimum of 700MWt during normal operation because of thermal-hydraulic instability at reduced power. Knowing 200MWt was still far too low to perform the test, they overrode additional automatic systems and manually raised still more control rods to compensate for the poisoning effect.108 At the same time, they connected all 8 main circulating pumps and increased the flow of coolant into the core, up to around 60,000 tons per hour.109 This volume of water was another violation of safety regulations, since very high water flow could lead to cavitation in the pipes. Increased coolant levels meant less steam, which soon caused the turbine speeds to drop. To counteract negative reactivity from all the extra coolant water, the operators withdrew most of the few control rods still inside the reactor, until the equivalent of only 8 fully inserted rods remained.110 The normal absolute minimum allowed at the time was 15, which increased to 30 after the accident.111

demonstrating that the first of these, the integral fast reactor, was safe even under the circumstances that destroyed Three Mile Island 2 and would prove disastrous at Chernobyl and Fukushima. The liquid fluoride thorium reactor (LFTR), an even more advanced concept developed at Tennessee’s Oak Ridge National Laboratory, is fueled by thorium. More plentiful and far harder to process into bomb-making material than uranium, thorium also burns more efficiently in a reactor and could produce less hazardous radioactive waste with half-lives of hundreds, not tens of thousands, of years. Running at atmospheric pressure, and without ever reaching a criticality, the LFTR doesn’t require a massive containment building to guard against loss-of-coolant accidents or explosions and can be constructed on such a compact scale that every steel mill or small town could have its own microreactor tucked away underground. In 2015 Microsoft founder Bill Gates had begun funding research projects similar to these fourth-generation reactors in a quest to create a carbon-neutral power source for the future. By then, the Chinese government had already set seven hundred scientists on a crash program to build the world’s first industrial thorium reactor as part of a war on pollution. “The problem of coal has become clear,” the engineering director of the project said. “Nuclear power provides the only solution.

Although Dyatlov, Shift Foreman Akimov, and Senior Reactor Control Engineer Toptunov had violated some operating regulations, they were ignorant of the deadly failing of the RBMK-1000 that meant that insertion of the control rods, instead of shutting down the reactor at the end of the test, could initiate a runaway chain reaction. Every one of the investigators behind the report now agreed that the fatal power surge that destroyed the reactor had begun with the entry of the rods into its core. ‘Thus the Chrnobyl accident comes within the standard pattern of most severe accidents in the world. It begins with an accumulation of small breaches of the regulations. … These produce a set of undesirable properties and occurrences that, when taken separately, do not seem to be particularly dangerous, but finally an initiating event occurs that, in this particular case, was the subjective actions of the personnel that allowed the potentially destructive and dangerous qualities of the reactor to be released.’ IAEA experts revealed at last the true magnitude of the technical cover-up surrounding the causes of the disaster: the long history of previous RBMK accidents, the dangerous design of the reactor, its instability, and the way its operators had been misled about its behavior. In dense scientific detail, it described the inherent problems of the positive void coefficient and the fatal consequences of the control rod ‘tip’ effect. (pp. 347-348)

HISTORICAL NOTE There are no nuclear power stations in Belarus. Of the functioning stations in the territory of the former USSR, the ones closest to Belarus are of the old Soviet-designed RBMK type. To the north, the Ignalinsk station, to the east, the Smolensk station, and to the south, Chernobyl. On April 26, 1986, at 1:23:58, a series of explosions destroyed the reactor in the building that housed Energy Block #4 of the Chernobyl Nuclear Power Station. The catastrophe at Chernobyl became the largest technological disaster of the twentieth century. For tiny Belarus (population: 10 million), it was a national disaster. During the Second World War, the Nazis destroyed 619 Belarussian villages along with their inhabitants. As a result of Chernobyl, the country lost 485 villages and settlements. Of these, 70 have been forever buried underground. During the war, one out of every four Belarussians was killed; today, one out of every five Belarussians lives on contaminated land. This amounts to 2.1 million people, of whom 700,000 are children. Among the demographic factors responsible for the depopulation of Belarus, radiation is number one. In the Gomel and Mogilev regions, which suffered the most from Chernobyl, mortality rates exceed birth rates by 20%. As a result of the accident, 50 million Ci of radionuclides were released into the atmosphere. Seventy percent of these descended on Belarus; fully 23% of its territory is contaminated by cesium-137 radionuclides with a density of over 1 Ci/km2. Ukraine on the other hand has 4.8% of its territory contaminated, and Russia, 0.5%. The area of arable land with a density of more than 1 Ci/km2 is over 18 million hectares; 2.4 thousand hectares have been taken out of the agricultural economy. Belarus is a land of forests. But 26% of all forests and a large part of all marshes near the rivers Pripyat, Dniepr, and Sozh are considered part of the radioactive zone. As a result of the perpetual presence of small doses of radiation, the number of people with cancer, mental retardation, neurological disorders, and genetic mutations increases with each year. —“Chernobyl.” Belaruskaya entsiklopedia On April 29, 1986, instruments recorded high levels of radiation in Poland, Germany, Austria, and Romania. On April 30, in Switzerland and northern Italy. On May 1 and 2, in France, Belgium, the Netherlands, Great Britain, and northern Greece. On May 3, in Israel, Kuwait, and Turkey. . . . Gaseous airborne particles traveled around the globe: on May 2 they were registered in Japan, on May 5 in India, on May 5 and 6 in the U.S. and Canada. It took less than a week for Chernobyl to become a problem for the entire world. —“The Consequences of the Chernobyl Accident in Belarus.” Minsk, Sakharov International College on Radioecology The fourth reactor, now known as the Cover, still holds about twenty tons of nuclear fuel in its lead-and-metal core. No one knows what is happening with it. The sarcophagus was well made, uniquely constructed, and the design engineers from St. Petersburg should probably be proud. But it was constructed in absentia, the plates were put together with the aid of robots and helicopters, and as a result there are fissures. According to some figures, there are now over 200 square meters of spaces and cracks, and radioactive particles continue to escape through them . . . Might the sarcophagus collapse? No one can answer that question, since it’s still impossible to reach many of the connections and constructions in order to see if they’re sturdy. But everyone knows that if the Cover were to collapse, the consequences would be even more dire than they were in 1986. —Ogonyok magazine, No. 17, April 1996

At that moment, remarkably, there was a man in the expansive reactor hall of Unit 4 who witnessed all this.121 Night Shift Chief of the Reactor Shop Valeriy Perevozchenko saw the top of the reactor - a 15-meter-wide disk comprised of 2000 individual metal covers which cap safety valves - begin to jump up and down. He ran. The reactor’s uranium fuel was increasing power exponentially, reaching some 3,000°C, while pressure rose at a rate of 15 atmospheres per second. At precisely 01:23:58, a mere 18 seconds after Akimov pressed the SCRAM button, steam pressure overwhelmed Chernobyl’s incapacitated fourth reactor. A steam explosion blew the 450-ton, 3-meter-thick upper biological shield clear off the reactor before it crashed back down, coming to rest at a steep angle in the raging maw it left behind. The core was exposed.122 A split second later, steam and inrushing air reacted with the fuel’s ruined zirconium cladding to create a volatile mixture of hydrogen and oxygen, which triggered a second, far more powerful explosion.123 Fifty tons of vaporised nuclear fuel were thrown into the atmosphere, destined to be carried away in a poisonous cloud that would spread across most of Europe. The mighty explosion ejected a further 700 tons of radioactive material - mostly graphite - from the periphery of the core, scattering it across an area of a few square kilometers. This included the roofs of the turbine hall, Unit 3, and the ventilation stack it shared with Unit 4, all of which erupted into flames. The reactor fuel’s extreme temperature, combined with air rushing into the gaping hole, ignited the core’s remaining graphite and generated an inferno that burned for weeks. Most lights, windows and electrical systems throughout the severely damaged Unit 4 were blown out, leaving only a smattering of emergency lighting to provide illumination.124