Radioactive iodine levels in the seawater around the Fukushima Daiichi nuclear power plant has lowered immensely. The workers plugged a water leak believed to be from its damaged reactor, the plant's owner said Wednesday night.
"Stopping the flow of highly radioactive water into the Pacific Ocean was a key victory for workers who have struggled to keep the earthquake-damaged plant's reactors from overheating for nearly four weeks".
The iodine-131 levels got to be as high as 7.5 million times legal standards in water directly behind the plant after the leak was discovered Saturday. They had lowered the levels to less than 4 percent of that amount in the 24 hours before the leak had been cut off Wednesday morning, according to figures released by Tokyo Electric.
Yet the top Japanese officials warned the fight was far from over.
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