Workers are continuing to bring the plant to a cold shutdown by January.

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The Japanese government insists that the reactors are in a "cold shutdown" state and no longer releasing high levels of radiation.

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By now, all the reactors should have cooled down to cold shutdown.

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The government has a target of the end of the year to bring the plant to a cold shutdown, when the reactors are stable and the water inside them is no longer boiling.

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It could be a long wait, says the BBC's Roland Buerk in Tokyo, as the plant's operator, Tokyo Electric Power Co (Tepco), has said it aims to bring the reactors to a cold shutdown within nine months.

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