Japan Panel Says Plant Operator Falls Short on Nuclear Safety

TOKYO—The operator of Japan's crippled Fukushima Daiichi nuclear plant is still failing to sufficiently ensure the safety of its nuclear operations, a government-appointed panel looking into the causes of last year's disastrous accident said Monday.

But in a final report that largely tracked an interim version released in June, no new light was shed on many questions about the disaster, an indication of the difficulty of getting to the bottom of the crisis. While the panel confirmed that the biggest leakage of radioactive materials occurred at Unit 2, it acknowledged it was no closer to finding out exactly how, when ...

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