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Great explaination! For the first time I can actually understand what happened at TMI. THANKS JACK!

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If anyone is curious why the Beznau Operators were able to determine their PORV had failed open in only about 3 minutes (footnote 1), note the Beznau PORV had a mechanical position indication in the control room. So all they had to do was look at it. That info is in the Rogovin Report. (Specific reference can be cited if needed).

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