The following is a summary of information received from General Atomics via fax:
On October 17, 2019, General Atomics (GA) identified a hardware failure in GA's Model RP-2C radiation monitoring system, manufactured and supplied by GA's Electromagnetic Systems Group (GA-EMS). The RP-2C radiation monitoring systems are used for post-accident monitoring of the containment area.
The defect would prevent the RP-2C from sensing a high radiation condition. This could present a potential safety hazard to personnel by not indicating the actual radiation value and by not actuating the plant systems connected to the alarm relays. It is noted that there are typically redundant high range containment monitoring systems available to the control room operators, and the operators would be able to rely on the remaining operable channels during an accident.
GA-EMS will issue a Quality Bulleting to the affected sites that will include additional detail in identifying affected modules and what to do if a defect is found. Sites are advised to continue performing their normal surveillance testing of the RP-2C module by utilizing the front panel CHECK test feature.
If you have any questions or need additional information concerning this report please contact Michael Grogan, Senior Director of Licensing, at (858) 455-2809 or Michael.Grogan@ga.com. Technical questions can be directed to Arthur Evans at (858) 964-6948.
The following plants are affected: FitzPatrick, Millstone, Peach Bottom, Pilgrim, Susquehanna, Catawba, McGuire, Saint Lucie, Sequoyah, Turkey Point, Watts Bar, Fermi, LaSalle, Palisades, Point Beach, Prairie Island, Quad Cities,
Arkansas Nuclear One, Columbia Generating Station, Crystal River, Kewaunee, San Onofre, Zion.