An April 22 incident at the Perry nuclear power plant in Ohio has prompted the Nuclear Regulatory Commission to send a special team of investigators to look into what caused higher than normal radiation readings in the reactor containment building. As CNN reported this morning:
Viktoria Mitlyng, an NRC spokeswoman, said five workers were involved in the incident, some of them plant employees and others contract workers. She was unable to provide the exact radiation levels detected.
The incident involved the removal of a “source range monitor” from the reactor core on April 22, the NRC statement said, adding that the plant was shut down for refueling at the time. Source range monitors measure nuclear reactions during “start up, low power operations and shutdown conditions,” the statement said.
“While performing the activities to remove the monitor, workers at the plant identified an increase in radiation levels in their work area,” the NRC statement said. “The workers stopped and immediately left the area when the higher than expected levels were identified. The licensee does not believe the workers received radiation in excess of NRC limits.”