TEPCO Lied About Radiation Levels

Tokyo Electric Power Company is just amazingly stupid. Given its past record of covering-up safety violations and when confronted with the evidence manged to avoid punishment because they and the rest of Japan's nuclear industry owns the government regulators and the responsible elected officials.
The Asahi Shinbun has obtain an internal memo from TEPCO showing that the company clearly understood what was happening at Fukushima and covered it up

The unpublished information shows that at 1:17 p.m. on March 13, 300 millisieverts of radiation per hour was detected inside a double-entry door at the No. 3 reactor building. At 2:31 p.m., the radiation level was measured at 300 millisieverts or higher per hour to the north of the door.

Both levels were well above the upper limit of 250 millisieverts for an entire year under the plant's safety standards for workers. But the workers who were trying to bring the situation under control at the plant were not informed of the levels.

The TEPCO data also showed high levels of hydrogen may be emitting from the damaged core of the No. 3 reactor on March 13, when TEPCO started injecting seawater to cool the reactor.