Tokyo (CNN) — Radioactive iodine in seawater around the Fukushima Daiichi nuclear power plant dropped sharply even before workers plugged a water leak believed to be from its crippled No. 2 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. But the Tokyo Electric Power Co. and a top Japanese official warned the fight was far from over.
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