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… 130, & Essential Service Water System Failures at Multi-Unit Sites, & Pursuant to 10 CFR 50.54 (Generic Letter … PRESSURIZED-WATER REACTOR NUCLEAR POWER PLANTS: 1. Braidwood Units 1 and 2 2. Byron Units 1 and 2 3. Catawba … the earlier development and promulgation of 10 CFR 50.63 (station blackout rule), which was based on an assumption …
Information Notice No. 90-51: Failures of Voltage-Dropping Resistors in the Power Supply Circuitry of Electric Governor Systems
… the Power Supply Circuitry of Electric Governor Systems … UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF … notified the NRC that during a refueling outage, the Byron Station Unit 1 A EDG had failed a scheduled 4-hour … declared the A EDG to be inoperable. On April 16, 1990, the Braidwood Unit 1 B EDG also failed a surveillance test. When …