Because it is cheaper to store them on site than to dispose of them, while Japan awaits the opening of a reprocessing plant.

因为日本在等待后处理厂开工时，就地储存比处理它们成本低。

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The Sellafield nuclear reprocessing plant has been shut down because of severe weather conditions.

BBC: Sellafield shutdown: Severe weather closes nuclear site

The building of a reprocessing plant at Rokkashomura, in Aomori prefecture, has been disappointingly slow.

ECONOMIST: Japan and Britain

It follows a minor incident at France's Flamanville nuclear reprocessing plant, less than 30 miles (50km) away.

BBC: Jonathan Le Tocq