Caption: Prairie Island 2 nuclear power plant
Prairie Island 2 nuclear power plant in Minnesota is back online three weeks after a false fire alarm brought the reactor offline.
Xcel Energy (NYSE: XEL) workers brought the unit back online March 28 after a disk ruptured in a pressure tank and triggered the false fire alarm on March 5. The alarm resulted in an unusual event declaration with the U.S. Nuclear Regulatory Commission.
Unit 2 continued to operate through the outage.
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