U.S. Nuclear Regulatory Commission Operations Center Event Reports For 09/11/96 - 09/12/96 ** EVENT NUMBERS ** 30991 30992 30993 +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 30991 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: BYRON REGION: 3 |NOTIFICATION DATE: 09/11/96 | |UNIT: [1] [ ] [ ] STATE: IL |NOTIFICATION TIME: 02:15 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 09/11/96 | +------------------------------------------------+EVENT TIME: 00:17[CDT]| |NRC NOTIFIED BY: FLOWERS |LAST UPDATE DATE: 09/11/96 | |HQ OPS OFFICER: CHAUNCEY GOULD +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |BRUCE JORGENSEN RDO | |ARPS 50.72(b)(2)(ii) RPS ACTUATION | | |AESF 50.72(b)(2)(ii) ESF ACTUATION | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | A/R Y 96 POWER OPERATION | 0 HOT STANDBY | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | THE PLANT HAD A REACTOR TRIP FROM 96% POWER DUE TO PERSONNEL ERROR. | | | | DURING THE PERFORMANCE OF "1BOSTS-M1", TURBINE OIL TRIPS MONTHLY | | SURVEILLANCE, A TURBINE TRIP/REACTOR TRIP OCCURRED. THE CAUSE OF THE | | TURBINE TRIP/REACTOR TRIP WAS A NONLICENSED EQUIPMENT OPERATOR MANIPULATING | | THE WRONG LEVER DURING THE TEST. ALL RODS FULLY INSERTED. THERE WAS NO | | SAFETY INJECTION AND NO RELIEF VALVES LIFTED. ALL AUTOMATIC ACTUATIONS | | OCCURRED AS PER DESIGN. AUX FEEDWATER AUTO STARTED AND IS BEING UTILIZED | | FOR DECAY HEAT REMOVAL. THE RI WAS INFORMED. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 30992 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: HADDAM NECK REGION: 1 |NOTIFICATION DATE: 09/11/96 | |UNIT: [1] [ ] [ ] STATE: CT |NOTIFICATION TIME: 15:04 [ET]| |RX TYPE: [1] W-4-LP |EVENT DATE: 09/01/96 | +------------------------------------------------+EVENT TIME: 09:00[EDT]| |NRC NOTIFIED BY: RICHARD DeBERNARDO |LAST UPDATE DATE: 09/11/96 | |HQ OPS OFFICER: RUDY KARSCH +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |FRANK COSTELLO RDO | |AINB 50.72(b)(2)(iii)(B) POT RHR INOP | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | N N 0 COLD SHUTDOWN | 0 COLD SHUTDOWN | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | NITROGEN INTRODUCED INTO THE REACTOR VESSEL DISPLACED INVENTORY INTO THE | | PRESSURIZER. | | | | THE LICENSEE DETERMINED AT 1440 EDT TODAY THAT, IN THE ABSENCE OF PROMPT | | OPERATOR ACTION, THIS EVENT COULD HAVE AFFECTED RESIDUAL HEAT REMOVAL. A | | LEAKING VALVE (BA-V-355) ALLOWED NITROGEN FROM THE VOLUME CONTROL TANK TO | | LEAK INTO THE REACTOR VESSEL. A NITROGEN BUBBLE FORMED IN THE VESSEL HEAD | | DISPLACING INVENTORY INTO THE PRESSURIZER. THE LICENSEE'S CALCULATIONS | | INDICATE THAT THE BUBBLE DISPLACED APPROXIMATELY 6000 GALLONS OF WATER. THE | | OPERATORS BECAME AWARE OF THE PROBLEM BY MONITORING AN INCREASE IN | | CONSUMPTION OF NITROGEN. THE INVENTORY DISPLACEMENT DID NOT UNCOVER THE | | HOT LEGS. HOWEVER, HADDAM NECK DOES NOT HAVE CORE EXIT THERMOCOUPLES OR | | REACTOR VESSEL LEVEL INDICATION. THE OPERATOR ACTION TO CORRECT THE | | PROBLEM WAS TO STOP THE LEAK, TO VENT THE NITROGEN, AND TO REPLACE COOLANT. | | THE LICENSEE BELIEVES THAT THE NRC RESIDENT INSPECTOR WAS NOTIFIED OF THIS | | EVENT ON 9/1/96. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 30993 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: BELLEFONTE REGION: 2 |NOTIFICATION DATE: 09/11/96 | |UNIT: [1] [2] [ ] STATE: AL |NOTIFICATION TIME: 15:46 [ET]| |RX TYPE: [1] B&W-R-LP (205),[2] B&W-R-LP (205) |EVENT DATE: 09/11/96 | +------------------------------------------------+EVENT TIME: 00:00[CDT]| |NRC NOTIFIED BY: JIM BLACKBURN |LAST UPDATE DATE: 09/11/96 | |HQ OPS OFFICER: RUDY KARSCH +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |PIERCE SKINNER RDO | |GCON 50.55(e)(1) CONSTRUCT DEFICIENCY | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | N N 0 UNDER CONSTRUCT | 0 UNDER CONSTRUCT | | 2 | N N 0 | 0 | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | A POTENTIAL DEFECT REPORTED TO THE LICENSEE VIA PART 21 AND EVENT NUMBER | | 30728. A DEFECT IN THE EMERGENCY DIESEL GENERATOR STARTING AIR VALVE COULD | | AFFECT THE DIESEL'S ABILITY TO START ON DEMAND. NO CLEAR CAUSE FOR THE | | REPORTED DEFICIENCY HAS BEEN DETERMINED, THE LICENSEE IS TRACKING THE | | SITUATION AND WILL TAKE THE APPROPRIATE CORRECTIVE ACTION. THE LICENSEE | | WILL INFORM THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+