The U.S. Nuclear Regulatory Commission (NRC) said it will “significantly” increase inspections at FirstEnergy’s (NYSE: FE) 1,261 MW Perry Nuclear Power Plant in Ohio after four contractors were exposed to radiation in 2010.
The NRC said the power plant failed to make adequate preparations for retracting a radioactive source range monitor from the reactor core. That could have resulted in a radiation overexposure to workers performing the activity. A source range monitor measures nuclear reactions during start up, low power operations and shutdown conditions.
In April 2010, four workers were retracting the monitor from the reactor core when they detected a rapid increase in radiation levels. At the time, the plant was shut down for a refueling outage.
The NRC said the plant's operator also must develop corrective and preventive measures.
Subscribe to Nuclear Power International magazine