” On 5/30/2016, a director of Tepco, Anegawa admitted that Tepco concealed the fact of meltdown in 311.
He stated that in the press conference of that day. He says it was obviously meltdown, but Tepco avoided mentioning the term of “meltdown”. He thinks that was concealment.
In Tepco’s internal manual, meltdown is defined to be when over 5% of reactor core is damaged. However Tepco did not mention meltdown even though they knew 55 ~ 70% of the core was damaged by 3/14/2011.
Anegawa commented ordinary engineer would call such a state meltdown even without a manual.
At this moment, third-party inspection committee is investigating Tepco for its arbitrariness. ”
by Iori Mochizuki