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System of emergency cooling of reactor No. 1 at the Fukushima nuclear power plant can be closed manually before the tsunami struck on March 11 after a spokesman for Tokyo Electric Power Co. and documents published by the tool.
Part of the condenser coils system is known as the insulation was about three hours, which may have contributed to the heart of the fusion reactor.
The discovery overturns the earlier conclusion by the Government that the capacitor has functioned normally, March 11.
"I learned (the closing), today through the media," Chief Cabinet Yukio Edan said in a press conference Tuesday. "We asked for the nuclear industry and the Ministry of Maritime Safety and other agencies to provide detailed analysis and reports (this issue)."
NISA, the government agency that oversees the operators of nuclear power plant, TEPCO on Tuesday urged to submit details of the May 23
TEPCO, the majority of electricity suppliers in Japan, revealed internal documents and data on Monday showing the isolation of the capacitor may have been manually shut down about 15 hours on March 11 shortly after kick following the earthquake at 14:46 The plant was affected by the tsunami at around 3: 30 pm
Liberalization of key information on March 11 days after the disaster has been delayed because most of it was held computers and documents in a central control room, where the high radiation to prevent workers from entering, TEPCO said.
The isolation condenser coils is designed to inject water into the reactor for at least eight hours after the main cooling system lost power, as was the 11th March.
"It is possible that the worker can be manually closed the valve (in the condenser coils isolation) to prevent a rapid drop in temperature, as determined by a reactor of this guideline," TEPCO spokesman said Hajime Motojuku The Japan Times.
A worker may have stopped the condenser coils to keep the cold water coming into contact with the hot steel of the reactor to prevent it from being damaged.