This Oct. 2008 file photo released by Kyodo News Agency on March 13, 2011 shows the No. 3 nuclear reactor of Japan's Fukushima No. 1 nuclear power station. Japan's Nuclear and Industrial Safety Agency said March 14, 2011 that hydrogen blast occurred at the No. 3 nuclear reactor of Fukushima No. 1 nuclear power plant at 02:01 GMT (11:01 local time). [Xinhua/Kyodo]