Source: Herald Sun
Date: AFP May 09, 2011 6:56PM
THE operator of Japan's stricken nuclear power plant may need to use lead sheets and metal tunnels to protect workers seeking to stabilise its reactors, the nuclear safety agency said today.
Before dawn today, Tokyo Electric Power Co (TEPCO) sent a team to measure radiation inside the building housing reactor one and detected levels between 10 and 700 millisieverts per hour in different parts of the structure.
Japanese nuclear workers are only allowed to be exposed to cumulative radiation of 250 millisieverts - meaning they could only stay in reactor one's most contaminated areas for about 20 minutes before hitting their limit.
"An area with a double-digit millisievert level, let alone three-digit figures, is quite tough as a working environment," said Hidehiko Nishiyama, a spokesman for the Nuclear and Industrial Safety Agency, Kyodo News reported.
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"So we have to do the work by using some shielding."
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