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April 19 (Bloomberg) - Robots sent in three buildings at the nuclear Fukushima Dai-Ichi crippled detected Japan radiation too toxic for humans after the plant operator with a plan to end the crisis in the six to nine months.Measurements show an hour in the building of the reactor No. 3 would expose humans to more than one-fifth of the radiation that the Japan has said is that most workers can withstand a year, the Atomic security agency said yesterday. The buildings were damaged by explosions in the days after a magnitude-9 quake and tsunami March 11 assommé air conditioners, triggering the worst nuclear disaster since Chernobyl 1986.A radiation in Fukushima Dai-Ichi station sustained decline can be achieved in the three moisTokyo Electric Power Co. said in a statement establishing his plans. After a judgment of the cold, where basic reactor temperatures drop below 100 degrees Celsius (212 degrees Fahrenheit), can be reached in six months, he said. "TEPCO should be faster than its described on two particular areas: circulate radioactive water in pressure vessels and covering the reactor buildings to avoid releases of radiation,"Tadashi Narabayashi, Professor of nuclear engineering at the University of Hokkaido said today.Over the next three months, Tepco, as the utility is known, plans to fill the vessels of containment of the reactor No. 1 and no. 3 units with water, the company said in its statement on April 17. The utility seal the vessel of the No. 2 reactor, which is probably damaged, before flooding it.Leak at sea "If flood us the ship damaged, contaminated water leakage increases", Tepco Vice President Sakae Muto told journalists in Tokyo on April 17. "We will continue to inject water with care and monitor the volume of water filtered.".Water pumped far overflowed in basements and the trenches, with some of them leaking into the ocean.TEPCO said earlier that it will begin draining the highly radioactive water in a trench near the No. 2 reactor today, Junichi Matsumoto, an official at Tokyo Electric, said to journalists. The power utility plans to move from 10 000 tonnes of contaminated water, a waste treatment unit and expects to finalize the transfer, Matsumoto said.Robots, RadiationTwo iRobot Corp. robots sent April 17 to check if humans can enter again the site found as high as 49 millisieverts per hour of radiation levels in the building of the No. 1 engine and up to 57 millisieverts in building No. 3said the nuclear and industrial safety agency.The cumulative maximum level of nuclear workers was raised 250 100 millisieverts millisieverts by the Ministry of health of the Japan on March 15. Exhibition totalling more than 100 millisieverts a year is the level below which any increase in cancer is obvious, according to the world nuclear Association in robot London.Another was sent in the reactor No. 2 building yesterday and recorded levels of 4.1 millisieverts per hourspokesman Tetsuya Terasawa told journalists today.TEPCO shares fell 8.4% 428 yen in Tokyo today and Exchange to 449 yen at 1: 46 pm. The stock is down by almost 80 percent since the earthquake and tsunami, which left people approximately 28,000 dead or missing.Pellets of fuel in no. 1, 2 and 3 reactors can melt at the plant, the nuclear safety agency, said today, in the first official confirmation of damage to the nuclei.Nitrogen injection "Believed that pellets of fuel in the reactors have melted", the Agency said in a report. "The extent of melting cannot be confirmed until the fuel rods have been removed."TEPCO provides inject nitrogen into the vessels of containment of the No. 2 and no. 3 reactor late April, said Muto. The injected utility inert gas in no. 1 unit this month to prevent explosions hydrogen. "Injection of nitrogen is not evil, but has no meaning, it has just one like that you do something,"said Michael Friedlander, a former nuclear engineer U.S. based in Hong Kong. "It's a question of resources and the population;" These people could be better used. "Three to six months after the initial phase of its plan, Tepco will attempt a closure cold reactors No. 1, 2 and 3, the company said. 4, 5 And 6 reactors were closed at the time of the disaster.The utility will also cover the No. 1, 3 and reactor buildings 4 as a temporary measure to reduce emissions of radiation after structures were damaged by hydrogen explosions last month, according to the Declaration. "TEPCO should cover buildings as soon as possible, at least before the typhoon season of Japan, because the rain and wind can cause leakage of radioactive water in spent fuel pools,"stated Narabayashi at the University of Hokkaido."-With the help of Kyung Bok Cho and Taku Kato in Tokyo. Editors: Aaron Sheldrick, Amit Prakash
To contact the reporters on this story: Yuji Okada at Tokyo to the yokada6@bloomberg.net; Michio Nakayama in Tokyo at the mnakayama4@bloomberg.net. Tsuyoshi Inajima in Tokyo at the tinajima@bloomberg.net
To contact the editor responsible for this story: Amit Prakash to aprakash1@bloomberg.net
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