Workers try to stop the spread of radiation on the damaged nuclear power plant in Fukushima Daiichi.The levels of emissions hot offshore deleted, but are often had the legal LimitWater in a pit, 7.5 million times on the standard radiation is a fish in the sea leaking is radiation and radiation in the seafood are now recognized RegulatedAn are official is "sorry", to be flip 11,500 tons of radioactive water into the seaTokyo (CNN) --japanische utility and Government authorities suffered fresh setbacks Tuesday detecting radiation in fish and news, that water gushing from the nuclear power plant Fukushima Daiichi in the Pacific radiation had more than a million times on the border and regulatory levels.
Readings of samples Saturday in the concrete pit outside the building the plant No.2 turbine reactor-one of six at the site of crisis geplagten-- radiation said 7.5 million times the legal limits, an official with the Tokyo electric power company, which runs the plant. Newer findings, showed 5 million times from Tuesday afternoon, a considerable decrease in the standard.
The company said also Tuesday that reduces the levels of emissions strongly could have a few dozen metres from the leak, with their assessment that the spill is a minimal effect on Sealife. But even in these spots, the levels of emissions, several hundred - thousand times the permitted remained.
Pointed out the problem, that getting a handle on how to minimize the radiation in the Pacific Ocean is the new, primary Battlefront in the week long crisis at the nuclear plant.
At about the same time as the said message Tokyo Electric Japanese Chief Cabinet Secretary Yukio Edano the presence of radioactive iodine "in a pattern of fresh fish" authorities, to regulate the radiation on seafood for the first time invited.
While fishing within 20 kilometres (12 miles) from Fukushima Daiichi was banned, it had no restrictions on seafood, was for some vegetables and milk from specific locales. Now, apply the same radiation standards, for vegetables apply ocean products as well.
"The" provisional swallowed limit, synonymous with vegetables and applied to fish and shellfish, will take effect immediately, "said the Minister."
Tuesday, Edano excused earlier for the decision, deliberately dump 11,500 tons of radioactive water in the sea-all part of the effort to the river of the more toxic liquid discovered before noise from outside the unit No. 2 days put an end to areas.
The process of the designation of contaminated water in the plant water treatment facility and some of its nuclear reactors began Monday and five days, a Tokyo Electric of official said.
"The water contains high levels of radiation," said Edano of the liquid dumped in the Pacific Ocean. "We are sorry for this decision, which we have to make."
The most contaminated batches of this water comes from outside of the reactor No. 6, said probably got via groundwater (and no breach in the device itself) officials. It has a concentration of iodine-131, which was 100 times more than the maximum number of tap water, drink the babies, and 10 times more than what would be OK in food.
As a whole is the dump is equivalent to about 3 million gallons, Gary was, nuclear engineering professor at the University of Michigan.
But Hidehiko Nishiyama, an official with Japan's nuclear and industrial Agency, said: "we have decided that unloaded the contaminated water into the sea poses no threat to the great health."
Experts say this is given a fair assessment, the probability that the contamination quickly diluted should, above all, when the tainted material mainly loses iodine-131, half of his radiation every eight days.
"To put this in perspective, keeps 300 trillion swimming pools full of water, and they go around the Pacific Ocean, full to about five swimming pools, share", said Timothy J?rgensen, Chairman of the Committee for radiation safety at the Georgetown University Medical Center. "So hopefully that quickly churning of the ocean and the streams that will dissipate so that it gets too much you dilute concentrations relatively quickly."
John till, President of South Carolina-based risk assessment Corp., said that he was not expected to see any permanent effects on marine life, even close to the plant. However, he added that officials radiation levels available - which reached oceans as should monitor as seafood, restaurants and markets.
A piece of good news, is reported to Japanese Government, that airborne radiation seems ever will fall to North-Eastern Japan. Quantities of radioactive iodine-131 two measures 15 km or less from the plant showed in between 2 and 3, 7 times of legal standards, with a much longer lasting caesium isotopic below the official limit.
Utility and Government officials have also described conditions in the Fukushima Prefecture Daiichi plant reactors and spent nuclear fuel pool as a generally stable. Exceptions only - such as the new must pump 3-meter-deep water in a drain outside the number increase 5 and 6 units out of fear that it could enter turbine building and short from power for the units close to nuclear fuel cooling systems. But not occurring in the same tempo, or with the same apparent heavy, how obvious weeks was such problems before.
However, the priority is that water stop, directly into the Pacific Ocean a broken concrete through shaft outside the reactor No. 2 was gushing has.
Edano said Monday that the decision, poisoned water from other reactors, and the waste water treatment facility No. 2 was dump "inevitable" to ensure "Safety" of the reactor core.
The idea is the tainted water from all around the No. 2 reactor turbine construction, reduction in so water no longer crashes into the sea off quickly to pumps, said an official of the Japanese nuclear safety. This comes after two failed the problematic anbrechen-- one of plug concrete walls, the other a chemical compound with sawdust and newspaper use mixed.
Reactors No. 1 and no. 3, which have lower levels of the water, must also be drained. Tokyo Electric's plan, that the water to other tanks, including some that are still set up to pump. Water in and around the No. 5 and 6 reactors is dropped directly into the sea, officials said.
A major problem could be that still do not know how got contaminated the bubbling water authorities, where it came from or how to fix potential holes and cracks deep in the reactor complex and nuclear fuel.
Michael Friedlander, a former senior U.S. nuclear engineer, said late Monday that authorities still, some problems related to excess, radioactive water - and the need to outrun - dump as long as they avoid large quantities in fuel to inject cores overheating in reactors and spent fuel pools.
"This is not a one-off thing," said Friedlander dumping radioactive water in the ocean. "This issue of water and water management will torture them until they can get (fully operational) long-term core cooling." CNN's Whitney Hurst, Matt Smith and Kyung LAH and journalist Hiroo SASO contributed to this report.
没有评论:
发表评论