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information about Fukushima published in English in Japanese media info publiée en anglais dans la presse japonaise

Level 3?

August 21, 2013

 

NRA may raise Fukushima leak severity rating

http://www3.nhk.or.jp/nhkworld/english/news/20130821_17.html

 

 

Japan's Nuclear Regulation Authority may raise the severity rating of the latest contaminated-water leakage at the troubled Fukushima nuclear power plant by 2 notches from its initial assessment.

Members of the NRA are discussing the matter at a meeting on Wednesday.

On Monday, highly radioactive water was found leaking from one of the tanks built on a hillside by the Number 4 reactor.

The NRA tentatively ranked the problem as level 1 on an 8-point international scale for nuclear accidents, which is the 2nd from the lowest.

But the authority is now considering raising the assessment to level 3, as it was found on Tuesday that more than 300 tons of contaminated water has been released from the tank.

The water is believed to contain thousands of trillions of becquerels of radioactive substances.

Level 3 incidents are the 5th highest on the international scale, and are classified as serious accidents.

In 1997, fire and explosions at a reprocessing plant in Tokai Village, Ibaraki Prefecture, caused radioactive materials to leak. Thirty-seven people were exposed to radiation. The incident was given a level 3 assessment.

The 1999 criticality accident at a nuclear fuel processing plant, also in Tokai Village, was given a level 4 assessment.
The NRA plans to seek advice from the International Atomic Energy Agency on the current Fukushima leak assessment.

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