Two items from today’s NRC Event Reports:
1. During surveillance testing yesterday, a portion of the High Pressure Core Injection (HPCI) system failed at the Fermi Unit 2 reactor in Michigan. The control room position indication was lost for the HPCI Minimum Flow Valve. Subsequent investigation showed that the main power fuses for the valve had blown. Following replacement of the fuses, “control room position indication was again lost when the operator depressed the open pushbutton.” The failure was reported “as a condition that at the time of discovery could have prevented the fulfillment of a safety function needed to mitigate the consequences of an accident….”
2. Rosemont Nuclear Instruments in Minnesota reported that testing indicated that 21 pressure transmitters shipped to nuclear power plants in the U.S. and overseas may be defective. The bad transmitters had been shipped to these U.S. plants: Calvert Cliffs -5 Transmitters, Oconee -2 Transmitters, San Onofre -1 Transmitter, River Bend -2 Transmitters, Waterford -1 Transmitter, Diablo Canyon -1 Transmitter and Farley -4 Transmitters.