What went wrong with Japan’s reactors?

Reports Monday night say there was another explosion at a nuclear reactor in Japan.

Three reactors at the Fukushima Daiichi nuclear plant lost the ability to cool down.
Crews are dumping sea water into them in a desperate attempt to get the situation under control.
How did the situation get to this point? Nick Dixon looks at what went wrong.

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John Luxat is a professor of nuclear safety analysis at Hamilton’s McMaster University.
He joins us to help us understand a little bit more about what’s happening with the nuclear situation in Japan.

Some people have reportedly tested positive for high radiation levels after the problems at Japan’s Fukushima power plant.
Brittany Gogo has more on the risks of radiation exposure.

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