Part 21 Report - 1995-042
LICENSEE: VIRGINIA POWER CO. SITE: NORTH ANNA 1 2 EN NUMBER:28331 DOCKET: 05000338 05000339 EVENT DATE: 02-03-95 RX TYPE: PWR PWR EVENT TIME: 14:30 VENDORS: W-3-LP W-3-LP NOTIFY DATE: 02-03-95 EMERGENCY CLASS: N/A REGION: 2 STATE: VA TIME: 15:15 OPS OFFICER: JOSEPH SEBROSKY 10 CFR SECTION: AOUT 50.72(b)(1)(ii)(B) OUTSIDE DESIGN BASIS NLCO TECH SPEC LCO A/S UNIT SCRAM RX INIT INITIAL MODE CURR CURRENT MODE CODE CRIT PWR PWR 1 N Y 100 POWER OPERATION 100 POWER OPERATION 2 N Y 91 POWER OPERATION 91 POWER OPERATION SOLID STATE PROTECTION SYSTEM (SSPS) DECLARED INOPERABLE FOR BOTH UNITS. AT 14:30 THE LICENSEE DECLARED THE SSPS INOPERABLE ON BOTH UNITS. THE REASON THE SSPS WERE DECLARED INOPERABLE IS BECAUSE A STEAM BREAK COULD CAUSE A SHORT IN THE TURBINE TRIP PROTECTION CIRCUITS LEADING TO A LOSS OF POWER TO BOTH TRAINS OF THE SSPS. THE POSTULATED EVENT IS SIMILAR TO THAT REPORTED BY DIABLO CANYON ON 2/1/95 (SEE EVENT #28318). THE LICENSEE HAS ENTERED TECHNICAL SPECIFICATION LIMITING CONDITION FOR OPERATION ACTION STATEMENTS 3.3.1.1 FOR THE REACTOR TRIP PROTECTION SYSTEM, 3.3.2.1 FOR THE ESF SYSTEM, AND 3.0.3 DUE TO DECLARING SSPS INOPERABLE. THE LIMITING TECH SPEC IS 3.3.2.1 WHICH REQUIRES THE LICENSEE TO BE IN HOT STANDBY WITHIN 6 HOURS AND TO BE IN HOT SHUTDOWN WITHIN 30 HOURS. THE LICENSEE WILL INFORM THE RESIDENT INSPECTOR.
Page Last Reviewed/Updated Wednesday, March 24, 2021
Page Last Reviewed/Updated Wednesday, March 24, 2021