2/17/2023 0 Comments The island part 2![]() ![]() ![]() This in turn caused the reactor to shut down automatically. ![]() It involved a relatively minor malfunction in the secondary cooling circuit which caused the temperature in the primary coolant to rise. The accident to unit 2 happened at 4 am on 28 March 1979 when the reactor was operating at 97% power. TMI-2 was of 906 MWe (880 MWe net) and almost brand new at the time of the accident. TMI-1, a PWR of 800 MWe (775 MWe net) entered service in 1974, and remains one of the best-performing units in the USA. The Three Mile Island power station is near Harrisburg, Pennsylvania in USA.
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