The Nuclear Regulatory Commission launched a special inspection at the Palisades Nuclear Plant after several workers were exposed to radiation, officials said Thursday.
The workers were not expected to suffer any adverse health effects and no medical treatment was necessary, the agency said in a statement.
About six workers were handling a two-part storage container underwater in the refueling area early Wednesday when an inner portion of the container briefly rose to the surface, the NRC said. The employees were exposed to radiation emitted from highly radioactive equipment inside the container.
According to radiation detectors worn by the workers, their maximum exposure was less than 50 millirems. A typical chest X-ray emits about 10 millirems.
Nuclear Management spokeswoman Arline Datu said Thursday the company took immediate action to protect the exposed workers and is cooperating with NRC inspectors.
The plant, near the edge of the Lake Michigan, is owned by CMS Energy Corp. and operated by Nuclear Management Co.