U.S. Nuclear Regulatory Commission Operations Center Event Reports For 05/18/94 - 05/19/94 ** EVENT NUMBERS ** 27268 27269 27270 27271 27272 +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27268 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: COMANCHE PEAK REGION: 4 |NOTIFICATION DATE: 05/18/94 | |UNIT: [1] [2] [ ] STATE: TX |NOTIFICATION TIME: 11:21 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 05/18/94 | +------------------------------------------------+EVENT TIME: 09:30[CDT]| |NRC NOTIFIED BY: T BROUGHTON |LAST UPDATE DATE: 05/18/94 | |HQ OPS OFFICER: JOHN MacKINNON +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |PHIL HARRELL RDO | |APRE 50.72(b)(2)(vi) OFFSITE NOTIFICATION | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | N Y 100 POWER OPERATION | 100 POWER OPERATION | | 2 | N N 0 COLD SHUTDOWN | 0 COLD SHUTDOWN | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | LICENSEE SPILLED APPROXIMATELY 220 gallons OF SULFURIC ACID WHICH REQUIRED | | THEM TO NOTIFY THE ENVIRONMENTAL PROTECTION AGENCY AND THE TEXAS NATURAL | | RESOURCES COUNCIL. | | | | LICENSEE WAS ADDING SULFURIC ACID TO THEIR LOW VOLUME WASTE POND (DRAIN OFF | | FROM THEIR NORMAL DRAINS AND SUMP WATER) TO ADJUST THE PONDS PH WHEN THEY | | ACCIDENTALLY SPILLED APPROXIMATELY 220 gallons OF THE SULFURIC ACID. THE | | SPILL WAS CONTAINED AND CLEANED UP. NO INJURIES REPORTED. | | | | RESIDENT INSPECTOR WAS INFORMED BY THE LICENSEE. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27269 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: MAINE YANKEE REGION: 1 |NOTIFICATION DATE: 05/18/94 | |UNIT: [1] [ ] [ ] STATE: ME |NOTIFICATION TIME: 18:29 [ET]| |RX TYPE: [1] CE |EVENT DATE: 05/18/94 | +------------------------------------------------+EVENT TIME: 18:00[EDT]| |NRC NOTIFIED BY: BAXTER |LAST UPDATE DATE: 05/18/94 | |HQ OPS OFFICER: DOUG WEAVER +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |GLENN MEYER RDO | |AOUT 50.72(b)(1)(ii)(B) OUTSIDE DESIGN BASIS | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |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 +------------------------------------------------------------------------------+ | FSAR CABLE SEPARATION CRITERIA NOT MET. | | | | TWO CABLE SEPARATION ISSUES WERE IDENTIFIED. | | | | 1) IN THE DIVERSE FEEDWATER TRIP SYSTEM, ONE HEATER DRAIN PUMP TRIP CABLE | | IS LOCATED IN THE INCORRECT CABLE TRAY. IT SHARES THE SAME CABLE RUN AS | | THE REDUNDANT TRIP CABLE FOR THE SAME PUMP FOR A PORTION OF THE CABLE RUN. | | THIS DOES NOT AFFECT THE OPERABILITY OF THE FEEDWATER TRAIN PUMP TRIP | | CIRCUITS. | | | | 2) IN THE DIVERSE FEEDWATER TRIP SYSTEM, THE CABLES WHICH SUPPLY THE | | FEEDWATER REGULATING VALVE AND THE FEEDWATER REGULATING BYPASS VALVE | | SOLENOIDS ARE BOTH PLACED IN THE INCORRECT (I.E. REVERSED) CABLE TRAYS. THE | | LICENSEE HAS NOT FOUND ANYTHING RELATED TO THIS ERROR WHICH AFFECTS | | OPERABILITY, BUT IS STILL INVESTIGATING THIS ASPECT. | | | | THE DIVERSE FEEDWATER TRIP SYSTEM TRIPS ALL THE SECONDARY SIDE PUMPS | | (CONDENSATE, HEATER DRAIN AND FEEDWATER PUMPS) UPON LOW STEAM GENERATOR | | PRESSURE COINCIDENT WITH A SAFETY INJECTION SIGNAL. | | | | THESE ITEMS WERE DISCOVERED DURING FOLLOWUP TO LER 94-005 SUBMITTED | | 4/13/94. THE LICENSEE WILL INFORM THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27270 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: MAINE YANKEE REGION: 1 |NOTIFICATION DATE: 05/18/94 | |UNIT: [1] [ ] [ ] STATE: ME |NOTIFICATION TIME: 21:39 [ET]| |RX TYPE: [1] CE |EVENT DATE: 05/18/94 | +------------------------------------------------+EVENT TIME: 20:25[EDT]| |NRC NOTIFIED BY: MALONEY |LAST UPDATE DATE: 05/18/94 | |HQ OPS OFFICER: DOUG WEAVER +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |GLENN MEYER 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/R Y 100 POWER OPERATION | 0 HOT STANDBY | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | REACTOR TRIP DUE TO FEED PUMP TRIP. | | | | TURBINE LOAD WAS BEING REDUCED TO FACILITATE WORK ON A BREAKER ON THE GRID. | | OPERATORS WANTED TO MAINTAIN REACTOR POWER AT 100% BECAUSE THE DROP IN | | TURBINE ELECTRICAL LOAD WAS EXPECTED TO BE OF SHORT DURATION. TURBINE LOAD | | WAS REDUCED BY OPENING SOME OF THE TURBINE BYPASS VALVES, THUS MAINTAINING | | REACTOR POWER NEAR 100% | | | | WHEN TURBINE LOAD WAS AT ABOUT 80% OF RATED LOAD THE TURBINE DRIVEN FEED | | PUMP P2C TRIPPED. THIS CAUSED A DIRECT MAIN TURBINE TRIP, WHICH CAUSED A | | REACTOR TRIP. ALL RODS FULLY INSERTED. ONE MOTOR DRIVEN STANDBY FEED PUMP | | STARTED, THE OTHER WAS TAGGED OUT. EMERGENCY FEED ALSO STARTED, BUT WAS | | THROTTLED BACK TO MINIMUM BECAUSE IT WAS NOT NEEDED WITH THE STANDBY FEED | | PUMP RUNNING. EACH STANDBY FEED PUMP IS CAPABLE OF ABOUT 50% OF FULL FLOW. | | STEAM GENERATOR LEVELS REACHED A MINIMUM OF ABOUT 20% NARROW RANGE BEFORE | | BEING RESTORED BY THE STANDBY FEED PUMP. STEAM IS BEING DUMPED TO THE MAIN | | CONDENSER TO REMOVE DECAY HEAT. | | | | THE FEED PUMP TURBINE TRIPPED ON OVERSPEED. AT THE TIME OF THE TURBINE | | TRIP, OPERATORS WERE PREPARING TO SHIFT THE STEAM SUPPLY ON THE FEED PUMP | | TURBINE FROM EXTRACTION STEAM TO MAIN STEAM. THE CAUSE OF THE MAIN FEED | | PUMP TURBINE TRIP IS BELIEVED TO BE A PARTIALLY OPEN CONTROL VALVE IN THE | | MAIN STEAM SUPPLY LINE. WHEN THE ISOLATION VALVE IN THIS LINE WAS OPENED, | | THE EXTRA STEAM SUPPLIED TO THE TURBINE CAUSED IT TO OVERSPEED. | | | | THE LICENSEE INFORMED THE NRC RESIDENT INSPECTOR AND THE STATE NUCLEAR | | SAFETY INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27271 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: PALO VERDE REGION: 4 |NOTIFICATION DATE: 05/18/94 | |UNIT: [ ] [2] [ ] STATE: AZ |NOTIFICATION TIME: 22:27 [ET]| |RX TYPE: [1] CE,[2] CE,[3] CE |EVENT DATE: 05/18/94 | +------------------------------------------------+EVENT TIME: 18:48[MST]| |NRC NOTIFIED BY: RAY ROBERTS |LAST UPDATE DATE: 05/18/94 | |HQ OPS OFFICER: DOUG WEAVER +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: UNUSUAL EVENT +-----------------------------+ |10 CFR SECTION: |PHIL HARRELL RDO | |AAEC 50.72(a)(1)(i) EMERGENCY DECLARED |STEVEN VARGA EO | | |EARL FEMA | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | | | | | 2 | N Y 86 POWER OPERATION | 86 POWER OPERATION | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | UNUSUAL EVENT DECLARED DUE TO A FIRE. | | | | A SECURITY GUARD REPORTED A FIRE TO THE CONTROL ROOM AT 1840 MST. THE FIRE | | WAS IN THE PLANT NORTH YARD AREA AND CONSISTED OF PLASTIC AND PLYWOOD. NO | | PERMANENT PLANT EQUIPMENT IS LOCATED IN THIS AREA. THE FIRE WAS | | EXTINGUISHED AT 1845 MST BY A SECURITY GUARD WITH A PORTABLE FIRE | | EXTINGUISHER. THE FIRE WAS STARTED BY A TEMPORARY LIGHT WHICH HAD FALLEN | | ON TO THE PLASTIC. | | | | THE FIRE WAS DETERMINED TO HAVE BURNED FOR MORE THAN 10 MINUTES BASED ON | | REVIEW OF THE FIRE SCENE BY A FIRE TEAM ADVISOR AND THE SHIFT SUPERVISOR. | | THE FIRE WAS ASSUMED TO HAVE BURNED FOR MORE THAN FIVE MINUTES BEFORE | | DISCOVERY. THE UNUSUAL EVENT WAS DECLARED AND TERMINATED AT 1848 MST. | | | | THE LICENSEE INFORMED THE NRC RESIDENT INSPECTOR, THE MARICOPA COUNTY | | SHERIFF'S OFFICE AND THE ARIZONA DEPARTMENT OF PUBLIC SAFETY. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27272 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: DIABLO CANYON REGION: 4 |NOTIFICATION DATE: 05/19/94 | |UNIT: [1] [2] [ ] STATE: CA |NOTIFICATION TIME: 05:27 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 05/19/94 | +------------------------------------------------+EVENT TIME: 02:07[PDT]| |NRC NOTIFIED BY: BOB ARROYO |LAST UPDATE DATE: 05/19/94 | |HQ OPS OFFICER: RUDY KARSCH +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: | | |DSAF 73.71(b)(1) SECURITY DEGRADATION | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |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 Y 100 POWER OPERATION | 100 POWER OPERATION | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | THE LICENSEE IS INVESTIGATING THE ALLEGATION THAT A SECURITY OFFICER WAS | | ASLEEP AT HIS POST ON 4/28/94. THERE IS NO EVIDENCE OF UNAUTHORIZED ENTRY | | AT THE SITE. THE LICENSEE WILL INFORM THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+