Japan’s crisis: No end in sight

Evidence is strong that at least two reactors have experienced a partial meltdown and that one containment vessel is cracked.

Tokyo Electric Power officials this week admit­ted they were losing their battle to contain the radiation leaks at Japan’s stricken Fukushima Daiichi nuclear power station. Despite frantic efforts by harried technicians, highly radioactive water leaking out of damaged reactors was hampering repair work, and officials said that the crisis could persist for months. Authorities found not only high levels of radiation in seawater near the plant but also plutonium in surrounding soil. Evidence is strong that at least two reactors have experienced a partial meltdown and that one containment vessel is cracked.

The damage poses a dilemma to plant officials and workers, who are still struggling to keep reactors and spent fuel rods from overheating. By spraying, dropping, and pumping in tons of water, they’ve created a new contamination source that spreads radioactivity as it leaks out. In seawater about 1,000 feet from the plant, sensors detected 3,355 times the normal level of iodine-131, a concentration officials contended does not pose a significant threat. Many workers are nearing the cumulative radiation limits set by Japan’s government and will have to be replaced.

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