U.S. Nuclear Regulatory Commission Operations Center Event Reports For 05/03/94 - 05/04/94 ** EVENT NUMBERS ** 27202 27203 27204 27205 27206 +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27202 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: HADDAM NECK REGION: 1 |NOTIFICATION DATE: 05/03/94 | |UNIT: [1] [ ] [ ] STATE: CT |NOTIFICATION TIME: 14:16 [ET]| |RX TYPE: [1] W-4-LP |EVENT DATE: 05/03/94 | +------------------------------------------------+EVENT TIME: 14:07[EDT]| |NRC NOTIFIED BY: LAPLATNEY |LAST UPDATE DATE: 05/03/94 | |HQ OPS OFFICER: CHAUNCEY GOULD +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |P. K. EAPEN 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 Y 100 POWER OPERATION | 100 POWER OPERATION | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | THE PLANT DETERMINED A CONDITION THAT COULD RENDER THE SERVICE WATER SYSTEM | | INOPERABLE. | | | | IT WAS DISCOVERED WHEN A SERVICE WATER OPERATION PERFORMANCE INSPECTION | | REVEALED A DESIGN PROBLEM, WHERE A FLOOD ABOVE SITE ELEVATION(21'- 6") | | COULD POTENTIALLY MAKE IT IMPOSSIBLE TO CLEAN THE PLANT SERVICE WATER | | STRAINERS. THE REASON THE STRAINERS COULD NOT BE CLEANED, IS THAT THE ROOM | | THEY ARE IN WOULD BECOME TOTALLY FLOODED. AT 30' FLOOD LEVEL, THE SERVICE | | WATER WOULD BE LOST AND THEY WOULD HAVE OTHER MITIGATION TECHNIQUES THEY | | COULD USE. THESE TECHNIQUES COULD ALSO BE USED DURING THE 21'- 6" FLOOD. | | THE RI WAS INFORMED ALONG WITH STATE AND LOCAL AGENCIES. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27203 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: PALISADES REGION: 3 |NOTIFICATION DATE: 05/03/94 | |UNIT: [1] [ ] [ ] STATE: MI |NOTIFICATION TIME: 18:19 [ET]| |RX TYPE: [1] CE |EVENT DATE: 05/03/94 | +------------------------------------------------+EVENT TIME: 14:45[EDT]| |NRC NOTIFIED BY: STEFFLER |LAST UPDATE DATE: 05/03/94 | |HQ OPS OFFICER: TIM McGINTY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |MICHAEL J. JORDAN RDO | |ADAS 50.72(b)(2)(i) DEG/UNANALYZED COND | | |AIND 50.72(b)(2)(iii)(D) ACCIDENT MITIGATION | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |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 +------------------------------------------------------------------------------+ | MAIN STEAM ISOLATION SOLENOID VALVES FOUND TO BE POWERED FROM THE SAME FUSE | | AS "NON-1E" COMPONENTS. | | | | THE LICENSEE HAS IDENTIFIED A CASE OF INADEQUATE ELECTRICAL CIRCUIT | | ISOLATION FOR MSIVs (MAIN STEAM ISOLATION VALVES). CLASS "1E" MAIN STEAM | | ISOLATION SOLENOID VALVES ARE POWERED FROM THE SAME FUSES AS "NON-1E" | | COMPONENTS. FAILURE OF "NON-1E" COMPONENTS COULD RESULT IN THE LOSS OF THE | | CAPABILITY TO CLOSE THE MSIVs AUTOMATICALLY, WHICH IS A CONDITION OUTSIDE | | OF THE DESIGN BASIS. | | | | THE LICENSEE HAS BEEN CONDUCTING AN EXTENSIVE REVIEW OF CABLE SEPARATION | | ISSUES. THE METHOD OF RESOLVING THE ISSUE IS UNDER INVESTIGATION. THE | | LICENSEE WILL INFORM THE RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27204 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: PALO VERDE REGION: 4 |NOTIFICATION DATE: 05/03/94 | |UNIT: [ ] [2] [ ] STATE: AZ |NOTIFICATION TIME: 18:24 [ET]| |RX TYPE: [1] CE,[2] CE,[3] CE |EVENT DATE: 03/12/94 | +------------------------------------------------+EVENT TIME: 14:45[MST]| |NRC NOTIFIED BY: ROGALSKI |LAST UPDATE DATE: 05/03/94 | |HQ OPS OFFICER: TIM McGINTY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: UNUSUAL EVENT +-----------------------------+ |10 CFR SECTION: |GARY SANBORN RDO | |AAEC 50.72(a)(1)(i) EMERGENCY DECLARED | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | | | | | 2 | N N 0 COLD SHUTDOWN | 0 COLD SHUTDOWN | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | THE LICENSEE MADE A LATE REPORT OF AN EVENT THAT OCCURRED ON 3/12/94 AND | | SHOULD HAVE BEEN DECLARED AN UNUSUAL EVENT AT THAT TIME DUE TO THE MANUAL | | START OF A THIRD CHARGING PUMP TO RECOVER PRESSURIZER LEVEL WHILE DRAWING | | THE BUBBLE. | | | | ON 3/12/94 AT 1445 MST, UNIT 2 WAS RETURNING FROM A MID-CYCLE OUTAGE AND | | WAS IN THE PROCESS OF DRAWING A BUBBLE IN THE PRESSURIZER. DURING THIS | | PROCESS (RETURNING FROM MID-LOOP OPS DURING WHICH SG EDDY CURRENT TESTING | | HAD BEEN PERFORMED) APPROXIMATELY 10,000 GALLONS OF MAKEUP HAD BEEN ADDED | | TO THE REACTOR COOLANT SYSTEM AND REACTOR COOLANT PUMPS HAD BEEN RUN TO | | SWEEP THE AIR OUT OF THE TUBES. WHILE IN THE PROCESS OF DRAWING THE BUBBLE | | (MAINTAIN PRESSURIZER LEVEL ROUGHLY 50%-60% DURING THIS PROCEDURE), AT | | ABOUT 1700 MST, A SECOND CHARGING PUMP WAS MANUALLY STARTED WITH | | PRESSURIZER LEVEL AT ABOUT 52%, TO AID IN FILLING WHAT WAS BELIEVED TO BE A | | VOID IN THE STEAM GENERATOR TUBE BUNDLE. AT APPROXIMATELY 2200 MST, A | | THIRD CHARGING PUMP WAS MANUALLY STARTED AS PROCEDURALLY REQUIRED AFTER | | PRESSURIZER LEVEL HAD DECREASED TO 42%. DURING THE EVENT, OPERATORS WERE | | IN THE PROCESS OF TRYING TO ESTABLISH LETDOWN AND NOTICED THAT AN | | INORDINATE AMOUNT OF MAKEUP WAS BEING ADDED TO THE RCS VIA THE CHARGING | | PUMPS, AND THEN TURNED THE PRESSURIZER HEATERS OFF TO ASSESS THE | | CONDITIONS, AT WHICH TIME THE LEVEL WENT DOWN TO 42%. | | | | AT 2210 MST, THE "A" LOW PRESSURE SAFETY INJECTION MINIMUM FLOW VALVE | | (SIA-UV-669) WAS FOUND OPEN. THE PROCESS OF DRAWING THE BUBBLE PROVIDED | | ENOUGH HEAD PRESSURE TO START SENDING INCREASED QUANTITIES OF WATER TO THE | | RWST, DURING WHICH TIME THE CHARGING PUMPS WERE RETURNING WATER TO THE RCS. | | THE VALVE WAS CLOSED AND PRESSURIZER LEVEL STARTED TO RECOVER. | | APPROXIMATELY 28,000 GALLONS OF WATER WAS PUMPED FROM THE RCS TO THE | | REFUELING WATER STORAGE TANK. UNIT PERFORMANCE EVALUATION COMPLETED ON | | 3/19/94 DETERMINED THAT BASED ON EMERGENCY PROCEDURE "02" AN UNUSUAL EVENT | | SHOULD HAVE BEEN DECLARED WHEN THE THIRD CHARGING PUMP WAS STARTED TO | | MAINTAIN LEVEL. THE EVENT WOULD HAVE BEEN TERMINATED AT 2210 MST ON | | 3/12/94 WHEN THE RECIRC VALVE WAS CLOSED AND PRESSURIZER LEVEL RECOVERED. | | THE RESIDENT INSPECTOR WAS NOTIFIED ON 3/19/94 OF THE EVENTS THAT | | TRANSPIRED, AND WILL BE NOTIFIED BY THE LICENSEE OF THE DECISION TO MAKE | | THIS NOTIFICATION. | | | | THE SAFETY INJECTION MINIMUM FLOW VALVE WAS OPEN BECAUSE IT HAD PREVIOUSLY | | BEEN TAGGED OPEN FOR TESTING, AND UPON CLEARING THE TAGOUT THE OPERATORS | | FAILED TO RESTORE THE SYSTEM TO THE PROPER CONFIGURATION. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27205 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: HARRIS REGION: 2 |NOTIFICATION DATE: 05/03/94 | |UNIT: [1] [ ] [ ] STATE: NC |NOTIFICATION TIME: 20:47 [ET]| |RX TYPE: [1] W-3-LP |EVENT DATE: 05/03/94 | +------------------------------------------------+EVENT TIME: 17:13[EDT]| |NRC NOTIFIED BY: PACE |LAST UPDATE DATE: 05/03/94 | |HQ OPS OFFICER: TIM McGINTY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |MARK LESSER 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 N 0 COLD SHUTDOWN | 0 COLD SHUTDOWN | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | AT 1713 EDT ON 5/3/94, APPROXIMATELY 100 GALLONS OF NORMAL SERVICE WATER | | WAS SPILLED DUE TO BROKEN PVC PIPING. APPROXIMATELY 10 GALLONS ENTERED THE | | STORM DRAINS. THE LEAK HAS BEEN ISOLATED. THE CP&L ENVIRONMENTAL | | COMPLIANCE UNIT HAS DETERMINED THAT THE 10 GALLONS DOWN THE STORM DRAIN IS | | REPORTABLE TO THE STATE OF NORTH CAROLINA. THE REPORT WILL BE MADE | | WEDNESDAY MORNING, 5/4/94. | | | | THE LICENSEE INFORMED THE RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27206 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: WATERFORD REGION: 4 |NOTIFICATION DATE: 05/04/94 | |UNIT: [3] [ ] [ ] STATE: LA |NOTIFICATION TIME: 04:05 [ET]| |RX TYPE: [3] CE |EVENT DATE: 05/04/94 | +------------------------------------------------+EVENT TIME: 02:35[CDT]| |NRC NOTIFIED BY: JOHN JARREL |LAST UPDATE DATE: 05/04/94 | |HQ OPS OFFICER: STEVE SANDIN +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: | | |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 | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 3 | N Y 100 POWER OPERATION | 100 POWER OPERATION | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | LICENSEE IDENTIFIED A CONDITION WHICH COULD RESULT IN ESF FILTRATION UNITS | | TRIPPING AFTER RESTART FOLLOWING A LOSS OF POWER. | | | | "AN INVESTIGATION INTO THE ESF FILTRATION UNIT HEATERS REVEALED A CIRCUITRY | | PROBLEM THAT WOULD CAUSE THE FILTRATION UNIT TO TRIP AFTER A RESTART | | FOLLOWING A LOSS OF POWER. THE AFFECTED ESF FILTRATION UNITS ARE THE | | CONTROLLED VENTILATION AREA SYSTEMS, SHIELD BUILDING VENTILATION SYSTEMS, | | CONTROL ROOM EMERGENCY FILTRATION SYSTEMS AND FUEL HANDLING BUILDING | | EMERGENCY FILTRATION SYSTEMS. THESE UNITS ARE DESIGNED TO START ON AN SIAS | | INCLUDING CONCURRENT LOSS OF OFFSITE POWER. AS THE CIRCUITRY EXISTS | | CURRENTLY, THE UNIT HEATERS WILL NOT RE-ENERGIZE AUTOMATICALLY AFTER LOSS | | OF POWER AND WILL CAUSE THE UNIT TO TRIP AFTER A 400 SECOND TIME DELAY ON | | LOW FILTER DIFFERENTIAL TEMPERATURE. A CHANGE IS BEING PLANNED TO RESET A | | TIME DELAY RELAY TO ALLOW THE HEATERS TO AUTOMATICALLY RE-ENERGIZE | | FOLLOWING A LOSS OF POWER. IN THE INTERIM, ADMINISTRATIVE CONTROLS HAVE | | BEEN ESTABLISHED TO MAINTAIN THE AFFECTED UNITS OPERABLE. AN OPERATIONS | | STANDING INSTRUCTION HAS BEEN PLACED IN EFFECT TO MANUALLY RESET THE | | HEATERS WITH THE HEATER PUSHBUTTON IN THE EVENT A LOSS OF POWER TO THE UNIT | | OCCURS." | | | | THE HEATER CONTROLS WERE REPLACED IN REFUELING OUTAGE 5, SEP 92. THE | | LICENSEE WAS UNABLE TO PROVIDE ANY FURTHER INFORMATION AS TO WHAT PROMPTED | | THE INVESTIGATION BUT DID NOTE THAT THIS PROBLEM WOULD NOT HAVE BEEN | | IDENTIFIED DURING SURVEILLANCE TESTING. THE LICENSEE WILL INFORM THE NRC | | RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+