TOYKO (majirox news) — Tokyo Electric Power Co. (TEPCO) said Oct. 2 that the Fukushima Daiichi nuclear power plant No. 2 reactor building may not have been destroyed in a hydrogen explosion as the government said it did in a report filed to the International Atomic Energy Agency (IAEA) in June.
TEPCO contradicts the story the government told the body overseeing the world’s nuclear energy programs.
The utility suggests in a report it is compiling on the nuclear crisis that the No. 2 reactor building may have been destroyed after being triggered to blow up by another explosion in the nearby No. 4 reactor building.
In June, the government reported to the IAEA that explosions in the No. 2 and No. 4 buildings were heard one after the other on March 15 and that “a large percussive sound believed to have arisen from a hydrogen explosion was confirmed” at around 6 a.m. on the same day near the pressure control room connected to the reactor’s containment vessel.
TEPCO now says, however, that analysis of a seismometer within the Fukushima Daiichi nuclear power plant showed that there had only been a single aftershock at the time, occurring at 6:12 a.m. on March 15.
The utility says that the percussive sound confirmed at the No. 2 building occurred almost simultaneously with the hydrogen explosion at the adjacent No. 4 building.