TOKYO, March 13 (Reuters) - There is a risk of an explosion at a building housing a nuclear reactor damaged by a massive earthquake in northeastern Japan after a buildup of hydrogen, although it is unlikely to affect the reactor’s core container, Japan’s Chief Cabinet Secretary Yukio Edano said on Sunday.
An explosion on Saturday blew off the roof of another reactor building at the Fukushima Daiichi nuclear plant.
A Trade Ministry official said there could be power shortages in areas covered by Tokyo Electric Power Co and Tohoku Electric Power Co , power outage were expected in some areas to avoid complete blackouts.
The official said TEPCO would select five areas of 5 million kilowatts each, and the areas would have planned blackouts of three hours in turn when power supplies were short. (Reporting by Chisa Fujioka and Osamu Tsukimori)