Hidehiko Nishiyama, a spokesman for Japan's nuclear and safety agency, described the findings as "extremely regrettable".

日本核能源及安全机构发言人英彦西山对这一结果表示“让人感到极其的悲痛”。

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"It's a harsh environment for humans to work inside," said Hidehiko Nishiyama of Japan's Nuclear and Industrial Safety Agency (Nisa).

“对于人类进行工作，那是个恶劣的环境，”日本核与工业安全部(Nisa)的Hidehiko Nishiyama说。

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NISA spokesman Hidehiko Nishiyama said the acute radiation exposure at Chernobyl killed 29 people in contrast to Fukushima, where no fatal casualties were reported.

NISA发言人Hidehiko Nishiyama说，切尔诺贝利核事故释放到空气中的核放射污染致29人死亡，而相对的，福岛核事故至今还未有重大伤亡发生。

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"It's a harsh environment for humans to work inside, " said Hidehiko Nishiyama of Japan's Nuclear and Industrial Safety Agency (Nisa).

BBC: Robots record high radiation levels at Japan reactors

Japan's government is consulting with experts from the U.S. Nuclear Regulatory Commission and the French nuclear fuel company Areva, said Hidehiko Nishiyama, deputy director-general of Japan's Nuclear and Industrial Safety Agency and the agency's chief spokesman.

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