At Three Mile Island, the NRC screwed up in just about every way possible.

1) Early on, they came up with an idiotically brazen lie to avoid admitting that there had been any release. This lie, signed off by at least three of the Commissioners, was quickly exposed, but only after turning the event into national news.

2) The next day they claimed that, if the hydrogen bubble in the top of the Reactor Pressure Vessel expanded too far, it would interfere with the reactor cooling. At best, this showed gross incompetence. The B&W reactor pressure vessel (RPV) has a ring of check valves near the top of the RPV which would vent the hydrogen to the RPV annulus if the bubble got down that far.

3) The following day on the basis of a calculation that was off by a actor of 100 and a misinterpreted measurement, and with no attempt to confirm either with the NRC guys on site, NRC-DC called Pennsylvania Governor Thornburgh and recommended evacuation up to 10 miles downwind. Harold Denton, the NRC employee who made the decision later said: ``my sole objective was to minimize the radiation exposure to the public. I did not give any weight to whatever hardship evacuation might cause”.\cite{walker-2004}[p 126] Fortunately, Thornburgh who was talking to the people at the plant did not follow Denton’s recommendation.1

4) Later in the day, the NRC said that a meltdown was unlikely, but possible. The reactor had melted down two days earlier.

5) That evening, when everything was calming down, and the hydrogen bubble in the RPV was expertly but slowly being squeezed down by the reactor operators, an NRC employee, almost certainly Dr. Roger Mattson, Director of Systems Safety, went to an AP reporter demanding anonymity, and told him the bubble in the the RPV could explode within two days. This bombshell sent seasoned war correspondents and over 100,000 locals into panicked evacuation. The local Bishop was so sure his flock was about to be annihilated he declared General Absolution.

An explosion in the RPV was impossible due to the lack of oxygen, which was obvious to any competent nuclear engineer. A Chicago Tribune reporter, who was part of the ‘night of terror’, later correctly called it a “a hoax, a fumbling miscalculation by one of the NRC’s masters of technology,”