U.S. Nuclear Regulatory Commission Operations Center Event Reports For 07/23/97 - 07/24/97 ** EVENT NUMBERS ** 32651 32664 32665 32666 32667 32668 !!!!!!!!! THIS EVENT HAS BEEN RETRACTED. THIS EVENT HAS BEEN RETRACTED !!!!!!! +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 32651 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: ZION REGION: 3 |NOTIFICATION DATE: 07/19/97 | |UNIT: [1] [2] [ ] STATE: IL |NOTIFICATION TIME: 03:51 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 07/19/97 | +------------------------------------------------+EVENT TIME: 01:25[CDT]| |NRC NOTIFIED BY: HANSON |LAST UPDATE DATE: 07/23/97 | |HQ OPS OFFICER: BOB STRANSKY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |JOHN MADERA RDO | |DDDD 73.71 UNSPECIFIED PARAGRAPH | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | N N 0 REFUELING | 0 REFUELING | | 2 | N N 0 COLD SHUTDOWN | 0 COLD SHUTDOWN | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | SECURITY EVENT. SAFEGUARDS SYSTEM DEGRADATION RELATED TO PROTECTED AREA | | BOUNDARY DETECTION. IMMEDIATE COMPENSATORY MEASURES TAKEN UPON DISCOVERY. | | THE LICENSEE NOTIFIED THE NRC RESIDENT INSPECTOR. REFER TO HOO LOG FOR | | ADDITIONAL DETAILS. | | | | * * * 07/23/97 @ 1238EDT BY CAPTAIN PLUTCHAK TAKEN BY MACKINNON * * * | | | | THE LICENSEE IS RETRACTIING THIS EVENT AFTER AN INVESTIGATION REVEALED THAT | | THERE WAS NO VUNERABILITY IN THEIR SECURITY SYSTEM. THE LICENSEE NOTIFIED | | NRC REGION 3 (BELANGER) OF THIS RETRACTION. R3DO (GAVULA) NOTIFIED. | | | | THE NRC RESIDENT INSPECTOR WAS NOTIFIED OF THIS EVENT BY THE LICENSEE. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 32664 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: RIVER BEND REGION: 4 |NOTIFICATION DATE: 07/23/97 | |UNIT: [1] [ ] [ ] STATE: LA |NOTIFICATION TIME: 00:23 [ET]| |RX TYPE: [1] GE-6 |EVENT DATE: 07/22/97 | +------------------------------------------------+EVENT TIME: 20:30[CDT]| |NRC NOTIFIED BY: VERNON CARLSON |LAST UPDATE DATE: 07/23/97 | |HQ OPS OFFICER: STEVE SANDIN +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |BLAINE MURRAY RDO | |AIND 50.72(b)(2)(iii)(D) ACCIDENT MITIGATION | | |NLCO TECH SPEC LCO A/S | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | N Y 100 POWER OPERATION | 100 POWER OPERATION | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | TRIP OF HPCS PUMP BREAKER DURING IN-SERVICE TESTING FOR REASONS UNKNOWN. | | | | "WHEN ATTEMPTING TO START THE HIGH PRESSURE CORE SPRAY (HPCS) PUMP TO | | SUPPORT IN-SERVICE TESTING, THE PUMP BREAKER TRIPPED. INDICATIONS AT THE | | BREAKER WAS THE TRIP WAS CAUSED BY THE 'A' PHASE INVERSE TIME OVERCURRENT | | RELAY. INVESTIGATIONS ARE ONGOING TO DETERMINE IF IT IS A RELAY OR PUMP | | MOTOR PROBLEM." | | | | THE LICENSEE HAD ENTERED THE 14 DAY TECH SPEC LCO A/S 3.5.1 ACTION B AT | | 0200CDT ON 7/22/97 FOR PLANNED MAINTENANCE ON THE SAFETY-RELATED UNIT ROOM | | COOLER. AT THAT TIME ALL OTHER ECCS EQUIPMENT WAS VERIFIED OPERABLE. | | OPERATORS DID NOT OBSERVE ANY UNUSUAL AMPERAGE INDICATION WHILE MONITORING | | IN-RUSH CURRENT PRIOR TO THE BREAKER TRIP. THE LICENSEE INFORMED THE NRC | | RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 32665 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: LASALLE REGION: 3 |NOTIFICATION DATE: 07/23/97 | |UNIT: [1] [ ] [ ] STATE: IL |NOTIFICATION TIME: 07:55 [ET]| |RX TYPE: [1] GE-5,[2] GE-5 |EVENT DATE: 07/23/97 | +------------------------------------------------+EVENT TIME: 04:36[CDT]| |NRC NOTIFIED BY: JAY HOUSTON |LAST UPDATE DATE: 07/23/97 | |HQ OPS OFFICER: STEVE SANDIN +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |JIM GAVULA RDO | |ARPS 50.72(b)(2)(ii) RPS ACTUATION | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | A N 0 COLD SHUTDOWN | 0 COLD SHUTDOWN | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | UNEXPECTED AUTOMATIC SCRAM WITH NO ROD MOTION DURING SURVEILLANCE TESTING. | | | | "UNIT 1 SCRAMMED AT 0436CDT ON JULY 23, 1997. AT THE TIME OF THE SCRAM THE | | UNIT WAS IN COLD SHUTDOWN WITH ALL CONTROL RODS INSERTED. THERE WAS NO ROD | | MOVEMENT DUE TO THE SCRAM. | | | | DURING THE PERFORMANCE OF LES-PC-108, MAIN STEAM ISOLATION ACTUATION LOGIC | | SYSTEM FUNCTIONAL TEST, A REACTOR PROTECTION SYSTEM 'B1' HALF SCRAM IS | | GENERATED. OPERATIONS PERSONNEL AND ELECTRICAL MAINTENANCE PERSONNEL WERE | | VERIFYING PROPER EQUIPMENT CONFIGURATION. WHEN THE ASSISTANT NUCLEAR | | STATION OPERATOR RETURNED FROM THE MAIN CONTROL ROOM BACK PANEL AREA, HE | | NOTICED THAT THE 'SCRAM AIR HEADER PRESSURE - LOW PRESSURE' ANNUNCIATOR HAD | | NOT RESET. THE UNIT NUCLEAR STATION OPERATOR DETERMINED THIS TO BE UNUSUAL | | AND THE 'B1' REACTOR PROTECTION SYSTEM HALF SCRAM WAS RESET. IT WAS ALSO | | NOTED THAT SEVERAL CONTROL ROD SCRAM VALVES WERE OPENING. THIS ALLOWS | | REACTOR WATER TO FILL THE SCRAM DISCHARGE VOLUME. | | | | WITHIN ONE SECOND AFTER THE REACTOR PROTECTION SYSTEM 'B1' CHANNEL HALF | | SCRAM WAS RESET A FULL REACTOR SCRAM SIGNAL WAS GENERATED. THE REACTOR | | SCRAM SIGNAL WAS GENERATED DUE TO THE SCRAM DISCHARGE VOLUME LEVEL HI. | | PERFORMANCE OF LES-PC-108, MAIN STEAM ISOLATION ACTUATION LOGIC SYSTEM | | FUNCTIONAL, WAS NOT A DIRECT CAUSE FOR THE SCRAM. AFTER THE SCRAM WAS | | RECEIVED, REACTOR WATER LEVEL DROPPED 2". THIS WAS DUE TO THE SCRAM | | DISCHARGE VOLUME FILLING. | | | | IT APPEARS THAT THE SCRAM WAS GENERATED DUE TO THE AIR OPERATED SCRAM | | VALVES BEGINNING TO OPEN DUE TO INSUFFICIENT AIR PRESSURE TO KEEP THEM | | CLOSED. THE 'B1' REACTOR PROTECTION SYSTEM WAS TRIPPED DUE TO LES-PC-108 | | IN PROGRESS. THIS REQUIRED THE 'A' REACTOR PROTECTION SYSTEM TO MAINTAIN | | AIR PRESSURE ON THE INDIVIDUAL CONTROL ROD HYDRAULIC UNIT SCRAM VALVES. THE | | SCRAM AIR PRESSURE APPARENTLY DECREASED ENOUGH TO ALLOW THE INDIVIDUAL | | CONTROL ROD HYDRAULIC UNIT SCRAM VALVES TO BEGIN OPENING. THE SCRAM | | DISCHARGE VOLUME FILLED WITH WATER. HI SCRAM DISCHARGE VOLUME SETPOINT WAS | | REACHED (767' 5 1/4"). A FULL REACTOR SCRAM SIGNAL WAS RECEIVED. THE | | REACTOR PROTECTION SYSTEM RESPONDED AS EXPECTED WHEN THE SCRAM WAS | | RECEIVED. | | | | EACH SCRAM VALVE HAS A SCRAM SOLENOID PILOT VALVE. THIS IS AN AIR | | DIAPHRAGM VALVE. THE POSSIBLE CAUSE OF THE LOW AIR PRESSURE IS DUE TO THE | | SEATS ON THE DIAPHRAGMS LEAKING BY CAUSING THE SCRAM AIR HEADER SYSTEM TO | | BLEED OFF. OTHER AIR LEAKS ON THE SYSTEM MAY HAVE ADDED TO THE LOW | | PRESSURE. | | | | AFTER REVIEWING THE COMED REPORTABILITY MANUAL SECTION SAF 1.12, IT HAS | | BEEN DETERMINED THAT THIS IS A VALID ESF ACTUATION. THE EVENT IS A 4 HOUR | | NOTIFICATION PER 10 CFR 50.72(b)(2)(ii)." | | | | THE LICENSEE SECURED FROM THE TEST AND RESET THE FULL SCRAM SIGNAL. THE | | LICENSEE HAS CORRECTIVE ACTION UNDER REVIEW. THE LICENSEE INFORMED THE NRC | | RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 32666 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: WASHINGTON NUCLEAR REGION: 4 |NOTIFICATION DATE: 07/23/97 | |UNIT: [2] [ ] [ ] STATE: WA |NOTIFICATION TIME: 11:25 [ET]| |RX TYPE: [2] GE-5 |EVENT DATE: 07/23/97 | +------------------------------------------------+EVENT TIME: 08:00[PDT]| |NRC NOTIFIED BY: JOHN ARBUCKLE |LAST UPDATE DATE: 07/23/97 | |HQ OPS OFFICER: STEVE SANDIN +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |BLAINE MURRAY RDO | |DDDD 73.71 UNSPECIFIED PARAGRAPH | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 2 | N Y 97 POWER OPERATION | 97 POWER OPERATION | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | SAFEGUARDS SYSTEM DEGRADATION RELATED TO DETECTION AT AREA BOUNDARY. | | COMPENSATORY MEASURES NOT FULLY IMPLEMENTED WITHIN THE REQUIRED 10 MINUTES | | BY SECURITY. THE LICENSEE WILL INFORM THE NRC RESIDENT INSPECTOR. SEE HOO | | LOG FOR ADDITIONAL DETAILS. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 32667 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: LASALLE REGION: 3 |NOTIFICATION DATE: 07/23/97 | |UNIT: [1] [2] [ ] STATE: IL |NOTIFICATION TIME: 16:41 [ET]| |RX TYPE: [1] GE-5,[2] GE-5 |EVENT DATE: 07/23/97 | +------------------------------------------------+EVENT TIME: 13:30[CDT]| |NRC NOTIFIED BY: DAVE SHELDON |LAST UPDATE DATE: 07/23/97 | |HQ OPS OFFICER: JOHN MacKINNON +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |JIM GAVULA RDO | |ADAS 50.72(b)(2)(i) DEG/UNANALYZED COND | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | N N 0 COLD SHUTDOWN | 0 COLD SHUTDOWN | | 2 | N N 0 REFUELING | 0 REFUELING | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | MISCELLANEOUS EQUIPMENT IN THE CONTROL ROOM FOUND NOT TO BE SEISMICALLY | | MOUNTED | | | | ENGINEERING HAS IDENTIFIED THAT SOME MISCELLANEOUS EQUIPMENT (CABINETS, | | CONTROL ROOM EMERGENCY BREATHING PACKS, CONTROL ROOM GAS MONITOR, etc.) FOR | | UNITS 1 & 2 ARE NOT SEISMICALLY MOUNTED. IF A SEISMIC EVENT WERE TO OCCUR, | | IT WAS DETERMINED THAT THIS EQUIPMENT COULD DAMAGE VITAL EQUIPMENT | | IMPORTANT TO THE SAFETY OF THE PLANT. IN THE CURRENT PLANT CONDITION, THE | | EQUIPMENT THAT WOULD BE DAMAGED FROM A SEISMIC EVENT IS NOT REQUIRED FOR | | PLANT SAFETY. THE EQUIPMENT WILL BE RELOCATED TO ACCEPTABLE AREAS UNTIL | | PROPER INSTALLATION CAN BE ENGINEERED. | | | | THE NRC RESIDENT INSPECTOR WAS NOTIFIED OF THIS EVENT BY THE LICENSEE. | | | | * * * UPDATE ON 07/23/97 @ 2256 BY DANIELS TAKEN BY MACKINNON * * * | | | | ALL EQUIPMENT WHICH COULD DAMAGE VITAL EQUIPMENT IF A SEISMIC EVENT | | OCCURRED HAS BEEN RELOCATED OR STORED IN THEIR PROPER LOCATION TO PREVENT | | THEM FROM DAMAGING VITAL EQUIPMENT IN THE CONTROL ROOM FOR UNITS 1 & 2. | | R3DO (GAVULA) NOTIFIED. | | | | THE NRC RESIDENT INSPECTOR WILL BE NOTIFIED OF THIS EVENT BY THE LICENSEE. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 32668 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: WATERFORD REGION: 4 |NOTIFICATION DATE: 07/23/97 | |UNIT: [3] [ ] [ ] STATE: LA |NOTIFICATION TIME: 18:56 [ET]| |RX TYPE: [3] CE |EVENT DATE: 07/23/97 | +------------------------------------------------+EVENT TIME: 17:30[CDT]| |NRC NOTIFIED BY: BECKENDORF |LAST UPDATE DATE: 07/23/97 | |HQ OPS OFFICER: JOHN MacKINNON +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |BLAINE MURRAY RDO | |DUNE 73.71(b)(1) UNAUTHORIZED ENTRY | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 3 | N N 0 HOT SHUTDOWN | 0 HOT SHUTDOWN | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | UNAUTHORIZED ENTRY INTO THE PROTECTED AREA. IMMEDIATE COMPENSATORY MEASURES | | TAKEN UPON DISCOVERY. | | | | THE NRC RESIDENT INSPECTOR WILL BE NOTIFIED BY THE LICENSEE OF THIS EVENT. | | | | REFER TO THE HOO LOG FOR ADDITIONAL DETAILS. | +------------------------------------------------------------------------------+