Spent fuel pool causing steam over Japan reactor

White smoke rising today from reactor No. 2 at Japan's stricken nuclear power plant is likely to be steam from the spent nuclear fuel pool, Japan's nuclear safety agency said.

White smoke rising on Tuesday from reactor No. 2 at Japan's stricken nuclear power plant is likely to be steam from the spent nuclear fuel pool, Japan's nuclear safety agency said.

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Earlier on Tuesday, steam appeared to rise from reactor No. 2 and white haze was detected above reactor No. 3.

There have been several blasts of steam from the reactors during the crisis triggered by a huge earthquake and tsunami on March 11 that left at least 21,000 people dead or missing.

Experts say the blasts probably released a small amount of radioactive particles.