TEPCO confirms damage to part of No. 4 unit's spent nuke fuel, Kyodo, April 13, 2011:
… The Nuclear and Industrial Safety Agency told the utility to immediately examine the [reactor] buildings and consider reinforcement work if they are judged as not sufficiently quakeproof. …Read the report here.
"As strong aftershocks occur almost daily, we have to consider what will happen to buildings already damaged by blasts," said Hidehiko Nishiyama, a spokesman for the nuclear agency.
He acknowledged the difficulties involved in the work to reinforce the quake resistance of the buildings, where radiation levels are high, but said, "We must devise some ways." The agency urged TEPCO to report back to it on the matter as soon as possible. …