hell. TMI wasnt the disaster the enviroweenies claimed
nothing like chenobyl
Three Mile Island wasn't supposed to be able to happen at all. The fact that it came so very close to a catastrophic meltdown astounded everybody. Some very bad assumptions were made, assumptions that anybody in maintenance could have told you would lead to disaster.
Technology Lessons from Three Mile Island | Daily Cup of Tech
Malcolm Gladwell, Outliers, page 183One of the most famous incidents in history, for example, was the near meltdown oat Pennsylvania’s Three Mile Island nuclear station in 1979. Three Mile Island so traumatized the American public that it sent the US nuclear power industry into a tailspin from which it has never fully recovered. But what actually happened at that nuclear reactor began as something far from dramatic. As the sociologist Charles Perrow shows in his classic Normal Accidents, there was a relatively routing blockage in what is called the plant’s “polisher” - a kind of giant water filter. The blockage caused moisture to leak into the plant’s air system, inadvertently tripping two valves and shutting down the flow of cold water into the plant’s steam generator. Like all nuclear reactors, Three Mile Island had a backup cooling system for precisely this situation. But on that particular day, for reasons that no one really understands, the valves for the backup system weren’t open. Someone had closed them, and an indicator in the control room showing they were closed was blocked by a repair tag hanging from a switch above it. That left the reactor dependent on another backup system, a special sort of relief valve. But, as luck would have it, the relief valve wasn’t working properly that day either. It stuck open when it was supposed to close, and, to make matters even worse, a gauge in the control room that should have told the operators that the relief valve wasn’t working was itself not working. By the time Three Mile Island’s engineers realized what was happening, the reactor had come dangerously close to a meltdown.
No single big thing went wrong at Three Mile Island. Rather, five completely unrelated events occurred in sequence, each of which, had it happened in isolation, would have caused no more than a hiccup in the plantÂ’s ordinary operation.