Ether_Snake
å®å®å®å®å®å®å®å®å®å®å®å®å®å®å®
Fukushima Plant Released Record Amount of Radiation Into Ocean
Nuclear Fission Detected at Fukushima Station
The destroyed Fukushima nuclear plant in Japan was responsible for the biggest discharge of radioactive material into the ocean in history, a study from a French nuclear safety institute said.
The radioactive cesium that flowed into the sea from the Fukushima Dai-Ichi nuclear plant was 20 times the amount estimated by its owner, Tokyo Electric Power Co., according to the study by the Institute for Radiological Protection and Nuclear Safety, which is funded by the French government.
Its the second report released in a week calling into question estimates from Japans government and the operator of the plant that was damaged in the March earthquake and tsunami. The Fukushima station may have emitted more than double the companys estimate of atmospheric release at the height of the worst civil atomic crisis since Chernobyl in 1986, according to a study in the Atmospheric Chemistry and Physics journal.
The oceanic study estimates 27,000 terabecquerels of radioactive cesium 137 leaked into the sea from the Fukushima plant, north of Tokyo.
Tepco is aware of the estimate from the institute through media reports and has no comment, spokesman Hajime Motojuku said today by phone.
Nuclear Fission Detected at Fukushima Station
Tokyo Electric Power Co. detected signs of nuclear fission at its crippled Fukushima atomic power plant, raising the risk of increased radiation emissions. No increase in radiation was found at the site and the situation is under control, officials said.
The company, known as Tepco, began spraying boric acid on the No. 2 reactor at 2:48 a.m. Japan time to prevent accidental chain reactions, according to an e-mailed statement today. The detection of xenon, which is associated with nuclear fission, was confirmed today by the Japan Atomic Energy Agency, the countrys atomic regulator said.
Given the signs, its certain that fission is occurring, Junichi Matsumoto, a general manager at Tepco who regularly talks to the media, told reporters in Tokyo today. Theres been no large-scale or sustained criticality and no increase in radiation, he said.
Fission taking place in the reactor can lead to increases in radiation emissions and raises concerns about further leaks after another radioactive hot spot was discovered in Tokyo on Oct. 29. Its possible there are similar reactions occurring in the No. 1 and No. 3 reactors, the other cores damaged at the station, Matsumoto said.
Melted fuel in the No. 2 reactor may have undergone a sustained process of nuclear fission or re-criticality, Tetsuo Ito, the head of Kinki Universitys Atomic Energy Research Institute, said by phone. The nuclear fission should be containable by injecting boron into the reactor to absorb neutrons.