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Mark Miller's avatar

I recall the Three Mile incident as it occurred the year I moved back to Ohio (1979).

https://www.history.com/topics/1970s/three-mile-island

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Van Snyder's avatar

"There are no other reactors in the world that have the Chernobyl design."

Actually, the Soviet Union built eleven of them. Not long ago, four were still in service. I don't know whether they have been closed. The troubles that plagued Chernobyl, and caused its destruction (low power instability due to xenon poisoning and weird control rod design), had already been detected in another one (near Leningrad), but were covered up because the reactors were considered to be a state secret. They were, after all, essentially of the same design as the Hanford plants that made plutonium for the Manhattan Project, scaled up, and for which Stalin had the plans before they were built. Yeah, the Soviets probably DID use them for weapons production by using very frequent refuelings so as not to make too much of the non-fissionable isotopes of plutonium.

The accident was not caused purposely, but it did ironically occur during a safety test. The reactor was inherently unsafe, and the people who designed and ran the "safety test" were incompetent. The staff who were "trained" to run the test had left because the local power authority in Kiev delayed it for several hours, so untrained staff ran the test. Yes, they "purposely shut off" some safety mechanisms to test whether run-down of the generator after steam production ceased would provide enough power to keep the coolant pumps running long enough for the diesel generators to reach full power. That might actually have worked, had the incompetent operators not lost control of the fission reaction.

The UNSCEAR report wrote that there is “no scientific means to determine whether a particular cancer in a particular individual was or was not caused by radiation,” and there is “no scientific evidence of increases in overall cancer incidence or mortality rates or in rates of non-malignant disorders that could be related to radiation exposure.” Then it speculated that there might have been fifteen excess cases of fatal juvenile thyroid cancer during the next fifteen years.

This is summarized in https://vsnyder.substack.com/p/five-myths-about-nuclear-power and described in detail in Section 9.1.2 in "Where Will We Get Our Energy?" (along with details of Three Mile Island and Fukushima).

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