The company on Saturday, explained the cessation of operations for decontamination by the fact that the radiation level in the apparatus for water rises much faster than anticipated. The reasons for this increase are being investigated. A full-scale launch of pollution-control equipment for the decontamination of highly radioactive water and use it for cooling the reactor was carried out on Friday, but the operation of the equipment was stopped after five hours of its launch. On Saturday Ters start pumping test low-level water treatment plants through the station. Of highly radioactive water accumulated in the underground premises units will be free of radiation and salt and is directed to cool the radioactive fuel. Cleanup will take place in four stages. The water will be consistently free of oil, then using zeolite (an inorganic silicate, which is a natural absorbent material) will be decontaminated and the last stage will be opresnena. As a result, the radiation level in the water will be reduced in 1000 – 100 thousand times. After cleaning fluid will be re-directed to the cooling of reactors. Will be cleaned daily 1.2 thousand tons, and by the end of the year will be 200 thousand tons of purified water. The cost of this operation will amount to 53.1 billion yen (663 million dollars). Currently, the underground premises station has accumulated more than 100 tons of highly radioactive water. Its daily volume increased by 500 tons through the water used to cool the reactor and pools of spent nuclear fuel (SNF). The need for an early start of deactivation due to the fact that the accumulated water at the plant highly ten days to rise to ground level and begins to pour out onto the surface. An earthquake of magnitude 9.0 March 11 in the north-eastern Japan, officially called the Great Earthquake of Eastern Japan, and the ensuing tsunami claimed the lives of 15.4 thousand people, about 8000 are unaccounted for. The tsunami that struck at the plant, "Fukushima-1", knocked out emergency power system, which led to shutdowns and fuel cooling pools of spent nuclear fuel. As a result, experts say Ters and Nuclear Safety Agency, Japan, the three reactors is likely a phenomenon called «melt-down», when the nuclear fuel rods from molten drops and collects in the bottom of the reactor vessel, or a partial penetration of fuel through the through- damage in the body at the bottom of the containment, the so-called «melt-through». After a series of radioactive leaks from the station exceeded the norms of radiation were found in water and foods in a number of Japanese prefectures. The government imposed restrictions on the supply of places s products on the market. Of 20 and 30-km zone and outside it, where they were found pockets of contamination, residents were evacuated. Japan Agency for Nuclear and Industrial Safety (NISA) has announced the awarding of the accident the maximum – the seventh – the level of risk. The seventh level of nuclear danger installed only once – during the Chernobyl accident in 1986. Earthquake in Japan: all news
Recent Comments
Related Posts
