Japan: cooling system pump has stopped at yet another nuclear power plant

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(IMAGE: Before and after shots of structures that house nuclear reactors at the Fukushima power plant in Japan, where an explosion occurred on Friday—blowing the roof off the building shown at right. This is one of four nuclear power plants in Japan now in trouble, after a devastating 9.0 earthquake and subsequent tsunami.)

Kyodo News service, Japan: "The Fire and Disaster Management Agency said a cooling system pump stopped operating at Tokai No. 2 Power Station, a nuclear power plant, in the village of Tokai, Ibaraki Prefecture."

Related: Japan's nuclear safety agency says the Onagawa plant that reported higher than normal radioactivity levels is said to be "functioning properly." The increased levels are believed to have been caused by leakage at nearby Fukushima.

An updated NYT overview of the rapidly unfolding nuclear crisis here. A total of four nuclear plants in Japan are in crisis, and the government reports that up to 141 people are confirmed to have been exposed to radiation, three of whom have radiation sickness.