19:03: Prime Minister Naoto Kan declares a nuclear emergency status announced by Yukio Edano, Chief Cabinet officer in Japan.18:18: Operators attempted to start reactor 1's emergency cooling system, but it did not function.18:00: The falling water level in reactor 1 reaches the top of the fuel, and the core temperature starts climbing.There is no report that radiation was detected outside power-plant borders. 16:00: The Nuclear and Industrial Safety Agency of Japan (NISA) initiates an emergency headquarters in an attempt to gather information on the 55 nuclear reactors in Japan.The shutdown of the other reactors then proceeded badly, and problems began to cascade." The damage prompted the plant's management to divert much of the attention and pumping capacity to that pool, the executive added. 2 reactor at Daiichi, said a nuclear executive who requested anonymity .
at the start of the crisis Friday, immediately after the shattering earthquake, Fukushima plant officials focused their attention on a damaged storage pool for spent nuclear fuel at the No. Īccording to a report in the New York Times, ". Later, as the temperature rose, a system started that used steam-powered pumps and battery-powered valves. Only the steam-powered pump systems (isolation condenser in reactor 1, high-pressure coolant injection and reactor core isolation cooling system in reactors 2 and 3) remained available. With the loss of all electrical power supply, the low-pressure core spray, the residual heat removal and low-pressure coolant injection system main pumps, and the automatic depressurization systems all failed (most of the emergency core cooling system).
TEPCO actually made this prediction in 2008 but delayed in submitting the report because they "did not feel the need to take prompt action on the estimates, which were still tentative calculations in the research stage". Tokyo Electric Power Company (TEPCO) submits a report to Japan's nuclear safety agency which predicts the possibility of a tsunami up to 10.2 metres high at the Fukushima Daiichi nuclear plant in the event of an earthquake similar to the magnitude 7.2 earthquake with accompanying tsunami that devastated the area in 1896.
#Japan reactor meltdown plus#
Times are given in Japan Standard Time (JST), unless noted, which is UTC plus nine hours. The subsequent lack of cooling led to explosions and meltdowns, with problems at three of the six reactors and in one of the six spent-fuel pools. The earthquake triggered a scram shut down of the three active reactors, and the ensuing tsunami crippled the site, stopped the backup diesel generators, and caused a station blackout. A nuclear disaster occurred there after a 9.0 magnitude earthquake and subsequent tsunami on 11 March 2011. įukushima Daiichi is a multi- reactor nuclear power site in the Fukushima Prefecture of Japan. The difficult cleanup job will take 40 or more years, and cost many tens of billions of dollars, with total economic costs estimated at $250–$500 billion. As of 2013, the Fukushima site remains highly radioactive, with some 160,000 evacuees still living in temporary housing, and some land will be unfarmable for centuries. Following the 2011 Japanese Fukushima nuclear disaster, authorities shut down the nation's 54 nuclear power plants.
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