Japan seeks to restart some nuclear power plants

TOKYO — Hoping to avert potentially devastating summer power shortages, Prime Minister Yoshihiko Noda said Friday that his government would seek to restart two nuclear reactors, in what would be a first step toward ending an almost complete shutdown of the nation’s nuclear power industry.

Mr. Noda declared units No. 3 and No. 4 at the Ohi Nuclear Power Plant in western Japan to be safe based on the results of computer simulations designed to check the reactors’ tolerance of a large earthquake and tsunami like those last year that knocked out cooling systems at the Fukushima Daiichi plant. The resulting partial meltdowns and fire spewed radiation across a wide area of northeastern Japan and the Pacific Ocean in the worst nuclear accident since the one at Chernobyl a quarter century earlier.

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