Radiation Near Japanese Plant’s Tanks Suggests New Leaks 急上昇する放射線濃度―さらなる汚染水の漏れ

(Source) http://www.nytimes.com/2013/09/01/world/asia/radiation-near-japanese-plants-tanks-suggests-new-leaks.html?_r=2&  

By MARTIN FACKLER

Published: August 31, 2013

TOKYO — A crisis over contaminated water at Japan’s stricken nuclear plant worsened on Saturday when the plant’s operator said it had detected high radiation levels near storage tanks, a finding that raised the possibility of additional leaks.
The operator, Tokyo Electric Power Company, or Tepco, said it had found the high levels of radiation at four separate spots on the ground, near some of the hundreds of tanks used to store toxic water produced by makeshift efforts to cool the Fukushima Daiichi plant’s three damaged reactors. The highest reading was 1,800 millisieverts per hour, or enough to give a lethal dose in about four hours, Tepco said.
The contaminated spots were found as Tepco employees checked the integrity of the tanks after a leak two weeks ago released 300 tons of toxic water into the Pacific. That leak prompted Prime Minister Shinzo Abe to announce that the government would step in at the plant, which was crippled two years ago by a huge earthquake and tsunami, to help get it under control amid rising public fears of a second environmental disaster.
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About 430,000 tons of contaminated water, or enough to fill 170 Olympic-size pools, are stored in rows of tanks at the plant, which appears to be running out of open space to put them all. The contaminated water increases by 400 tons every day as groundwater flows into the basements of the damaged buildings housing the three ruined reactors, which melted down in the worst nuclear accident since Chernobyl in 1986.

Tepco must draw off that water to prevent it from overwhelming jury-rigged cooling systems that keep the reactors’ melted cores from reheating and melting into the ground in a phenomenon known as the China syndrome. Tepco has struggled to safely handle and store all the water.