U.S. Nuclear Regulatory Commission Operations Center Event Reports For 06/06/94 - 06/07/94 ** EVENT NUMBERS ** 27264 27354 27355 27356 27357 27358 27359 27360 !!!!!!!!! THIS EVENT HAS BEEN RETRACTED. THIS EVENT HAS BEEN RETRACTED !!!!!!! +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27264 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: PEACH BOTTOM REGION: 1 |NOTIFICATION DATE: 05/17/94 | |UNIT: [2] [3] [ ] STATE: PA |NOTIFICATION TIME: 10:06 [ET]| |RX TYPE: [2] GE-4,[3] GE-4 |EVENT DATE: 05/17/94 | +------------------------------------------------+EVENT TIME: 05:58[EDT]| |NRC NOTIFIED BY: DISHONG |LAST UPDATE DATE: 06/06/94 | |HQ OPS OFFICER: STEVE SANDIN +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |GLENN MEYER RDO | |AESF 50.72(b)(2)(ii) ESF ACTUATION | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 2 | N N 0 REFUELING | 0 REFUELING | | 3 | N Y 100 POWER OPERATION | 100 POWER OPERATION | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | ACTUATION OF THE CONTROL VENTILATION SYSTEM IN THE EMERGENCY MODE DUE TO | | HIGH RAD LEVEL INDICATION FOR REASON UNKNOWN. | | | | "DURING NORMAL OPERATIONS WITH UNIT 2 IN REFUEL MODE AND UNIT 3 AT 100% | | POWER, CONTROL ROOM VENTILATION RADIATION LEVELS AS SENSED BY RIS-0760 A | | THRU D INCREASED TO THE TRIP SETPOINT AND CONTROL ROOM EMERGENCY | | VENTILATION INITIATED. CHANNELS A AND C INDICATED SLIGHTLY HIGHER THAN | | NORMAL RAD LEVELS OF 100 CPM (BELOW TRIP). CHANNELS B AND D INDICATED | | APPROXIMATELY 700 CPM FOR 10 MINUTES (TRIP AT 350 CPM) THEN RETURNED TO | | NORMAL. CONTROL ROOM VENTILATION RETURNED TO NORMAL AT 0623." | | | | THE LICENSEE IS INVESTIGATING WHETHER THE HIGH LEVEL INDICATION IS | | ATTRIBUTED TO THE MOVEMENT OF RAD MATERIAL. NO GRAB SAMPLES WERE TAKEN TO | | VERIFY THE ABSENCE OF AN AIRBORNE CONDITION AND THE RAD MONITOR IS | | CONSIDERED OPERABLE AT THIS TIME. THE LICENSEE WILL INFORM THE NRC RESIDENT | | INSPECTOR. | | | | * * * UPDATE 1353EDT 6/6/94 FROM D. FOSS TO S. SANDIN * * * | | THE LICENSEE IS RETRACTING THIS EVENT DUE TO VERIFICATION THAT THE | | INITIATING SIGNAL WAS SPURIOUS CAUSED BY NOISE ON THE COAX BETWEEN THE | | DETECTOR AND PRE-AMP. THE LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. | | NOTIFIED R1DO(TRAPP). | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27354 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: RIVER BEND REGION: 4 |NOTIFICATION DATE: 06/06/94 | |UNIT: [1] [ ] [ ] STATE: LA |NOTIFICATION TIME: 12:12 [ET]| |RX TYPE: [1] GE-6 |EVENT DATE: 06/06/94 | +------------------------------------------------+EVENT TIME: 07:30[CDT]| |NRC NOTIFIED BY: VERNON CARLSON |LAST UPDATE DATE: 06/06/94 | |HQ OPS OFFICER: GREG SCARFO +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |GARY SANBORN RDO | |AESF 50.72(b)(2)(ii) ESF ACTUATION | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | N N 0 REFUELING | 0 REFUELING | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | THE UNIT EXPERIENCED A DIV I BOP ISOLATION SIGNAL DURING CONNECTION OF TEST | | EQUIPMENT. | | | | "WHILE INSTALLING TEST EQUIPMENT FOR "STP 058-4802", FUSE NO. "1B21H-F28A" | | IN PANEL "H13-P623" BLEW OUT CAUSING A DIV I BALANCE OF PLANT (BOP) | | ISOLATION SIGNAL. THIS SIGNAL WOULD HAVE ISOLATED THE FOLLOWING SYSTEM | | CONTAINMENT ISOLATION VALVES: | | | | - SERVICE WATER (TO DRYWELL UNIT COOLERS) | | - FUEL POOL COOLING AND CLEANUP | | - EQUIPMENT/FLOOR DRAINS | | - INSTRUMENT AIR/SERVICE AIR | | - CONDENSATE MAKEUP AND DRAW OFF | | - REACTOR PLANT CLOSED COOLING WATER | | - REACTOR WATER CLEANUP | | - CONTAINMENT CHILLED WATER | | - REACTOR PLANT SAMPLING | | - REACTOR RECIRC HYDRAULIC SUPPLY | | | | ALSO FUEL BUILDING, REACTOR/AUXILIARY BUILDING AND CONTROL BUILDING | | VENTILATION SYSTEMS RECEIVED ISOLATION SIGNALS AND START SIGNALS FOR | | STANDBY GAS TREATMENT, FUEL BUILDING FILTER TRAIN AND CONTROL BUILDING | | FILTER TRAINS. HOWEVER, ONLY THE DAMPERS ON THE VENTILATION SYSTEM FROM | | THESE ITEMS RESPONDED BECAUSE THE OTHER COMPONENTS WERE EITHER CLOSED, | | LOCKED OUT OR DE-ENERGIZED TO SUPPORT "STP 058-4802". THE ONLY OTHER ITEMS | | FROM THIS SIGNAL WERE 2 EJS BREAKERS TRIPPED TO STRIP NON-ESSENTIAL LOADS | | FROM THE DIV I SAFETY RELATED SWITCHGEAR AND THE CONTAINMENT ATMOSPHERE | | MONITORING SYSTEM HYDROGEN ANALYZER AUTOSTARTED. ALL TEST EQUIPMENT HAD | | BEEN INSTALLED PER THE STP WITH NO OBVIOUS ERRORS DURING INSTALLATION. THE | | FUSE WAS REPLACED AND ALL ACTUATED SYSTEMS RESTORED TO THEIR PRE-EVENT | | CONDITION." | | | | THE FUSE BLEW WHILE INSTALLING A PATCH CORD BETWEEN TWO VISICORDERS. THE | | LICENSEE IS EVALUATING A PROCEDURAL UPGRADE TO PREVENT A RECURRENCE. THE | | LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27355 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: ROBINSON REGION: 2 |NOTIFICATION DATE: 06/06/94 | |UNIT: [2] [ ] [ ] STATE: SC |NOTIFICATION TIME: 12:29 [ET]| |RX TYPE: [2] W-3-LP |EVENT DATE: 06/06/94 | +------------------------------------------------+EVENT TIME: 11:53[EDT]| |NRC NOTIFIED BY: BOB REYNOLDS |LAST UPDATE DATE: 06/06/94 | |HQ OPS OFFICER: STEVE SANDIN +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: ALERT +-----------------------------+ |10 CFR SECTION: |JOHN POTTER RDO | |AAEC 50.72(a)(1)(i) EMERGENCY DECLARED |ROBERT DENNIG EO | |APRE 50.72(b)(2)(vi) OFFSITE NOTIFICATION |WITSBERGER FEMA | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 2 | N Y 100 POWER OPERATION | 100 POWER OPERATION | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | UNIT 2 DECLARED AN ALERT DUE TO A LUBE OIL FIRE ON THE EXHAUST MANIFOLD OF | | THE "A" EDG DURING SURVEILLANCE TESTING. | | | | THE "A" EDG HAD BEEN REMOVED FROM SERVICE FOR REPLACEMENT OF THE #9 | | CYLINDER INJECTOR. THE POST MAINTENANCE SURVEILLANCE TEST "ST OST 401" | | REQUIRES THAT THE EDG BE PLACED ON-LINE AND FULLY LOADED FOR AT LEAST 1 | | HOUR. AT APPROXIMATELY 1148EDT THE EDG WAS STARTED AND PLACED ON-LINE. AT | | THAT TIME A LUBE OIL LEAK ON THE EXHAUST MANIFOLD IGNITED CAUSING VISIBLE | | FLAMES ON THE HEAT SHIELD AND EXHAUST MANIFOLD. THE PLANT FIRE BRIGADE | | RESPONDED, HOWEVER, THE FIRE SELF-EXTINGUISHED WHEN THE EDG WAS SECURED. | | THERE WERE NO INJURIES OR APPARENT EDG DAMAGE. THE LICENSEE DECLARED AN | | ALERT AT 1153EDT WHICH WAS TERMINATED AT 1217EDT DUE TO THE FIRE BEING OUT | | AND THE PLANT IN A STABLE CONDITION. THERE WAS NO OFFSITE RADIOLOGICAL | | RELEASE. ERDS WAS ACTIVATED AT 1228EDT PER THE LICENSEE EMERGENCY PLAN. | | WITH THE "A" EDG INOPERABLE, THE UNIT REMAINS IN A 7 DAY LCO WHICH EXPIRES | | AT 0502EDT ON 6/13/94. THE LICENSEE ANTICIPATES RESTORING THE "A" EDG | | BEFORE THE END OF TODAY. THE LICENSEE INFORMED THE STATE OF SOUTH CAROLINA, | | THE COUNTIES OF DARLINGTON, LEE AND CHESTERFIELD, AND THE NRC RESIDENT | | INSPECTOR. THE LICENSEE ALSO PLANS ON MAKING A PRESS RELEASE DUE TO THE | | STATE PRESS RELEASE WHICH WILL BE ISSUED. | | | | NOTIFIED: USDA (COOPER), DOT (FLOYD), DOE (CLAUS), HHS (BURGER), | | EPA (CONKLIN) | | | | HOO NOTE: THIS EVENT IS SIMILAR TO THE ALERT DECLARED ON 8/16/93 INVOLVING | | A LUBE OIL FIRE ON THE SAME EDG - SEE EVENT #25927. | | | | * * * UPDATE 1607EDT 6/6/94 FROM GARROU TO S. SANDIN * * * | | A PRESS RELEASE WAS ISSUED AT 1345EDT IN ACCORDANCE WITH AN AGREEMENT | | BETWEEN THE LICENSEE AND THE STATE OF SOUTH CAROLINA. THE LICENSEE INFORMED | | STATE/LOCAL AGENCIES AND THE NRC RESIDENT INSPECTOR. NOTIFIED R2DO(POTTER). | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27356 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: GRAND GULF REGION: 2 |NOTIFICATION DATE: 06/06/94 | |UNIT: [1] [ ] [ ] STATE: MS |NOTIFICATION TIME: 13:39 [ET]| |RX TYPE: [1] GE-6 |EVENT DATE: 06/06/94 | +------------------------------------------------+EVENT TIME: 12:39[CDT]| |NRC NOTIFIED BY: WALTER CADE |LAST UPDATE DATE: 06/06/94 | |HQ OPS OFFICER: STEVE SANDIN +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |JOHN POTTER RDO | |AARC 50.72(b)(1)(v) OTHER ASMT/COMM 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 LICENSEE REMOVED THE POST ACCIDENT SAMPLE SYSTEM FROM SERVICE DUE TO A | | MODIFICATION DESIGN CHANGE. IT IS ANTICIPATED THAT THE MODIFICATION WILL BE | | COMPLETED WITHIN AN HOUR. THE LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27357 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: CLINTON REGION: 3 |NOTIFICATION DATE: 06/06/94 | |UNIT: [1] [ ] [ ] STATE: IL |NOTIFICATION TIME: 17:01 [ET]| |RX TYPE: [1] GE-6 |EVENT DATE: 05/12/94 | +------------------------------------------------+EVENT TIME: 00:00[CDT]| |NRC NOTIFIED BY: RON FRANTZ VIA FAX |LAST UPDATE DATE: 06/06/94 | |HQ OPS OFFICER: STEVE SANDIN +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: | | |CCCC 21.21 UNSPECIFIED PARAGRAPH | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |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 LICENSEE DISCOVERED DURING POST MAINTENANCE TESTING OF THE DIV 3 EDG | | THAT A NEWLY INSTALLED MOTOR-OPERATED POTENTIOMETER (MOP) MODEL NO. | | "MOC3502", PART # 9072300116 WAS NOT OPERATING PROPERLY AND WOULD NOT ALLOW | | OPERATORS TO ADJUST GENERATOR VOLTAGE. A SUBSEQUENT INVESTIGATION | | DETERMINED THAT TWO WIRES INTERNAL TO THE MOP UNIT WERE CONNECTED TO THE | | WRONG TERMINALS. THE MOP IS MANUFACTURED BY BASLER ELECTRIC, HIGHLAND, | | ILL., AND SUPPLIED BY MKW POWER SYSTEMS, ROCKY MOUNT, NC., AS A BASIC | | COMPONENT. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |OTHER NUCLEAR MATERIAL | |EVENT NUMBER: 27358 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |LICENSEE: SYNCOR INTERNATIONAL CORP. |NOTIFICATION DATE: 06/06/94 | | CITY: TULSA REGION: 4 |NOTIFICATION TIME: 17:12 [ET]| | COUNTY: STATE: OK |EVENT DATE: 06/06/94 | |LICENSE#: 35-19583-01MD AGREEMENT: N |EVENT TIME: 03:00[CDT]| | DOCKET: |LAST UPDATE DATE: 06/06/94 | | +-----------------------------+ | |PERSON ORGANIZATION| | |GARY SANBORN RDO | | | | +------------------------------------------------+ | |NRC NOTIFIED BY: DAVID PELLICCIARINI | | |HQ OPS OFFICER: STEVE SANDIN | | +------------------------------------------------+ | |EMERGENCY CLASS: NOT APPLICABLE | | |10 CFR SECTION: | | |IBBE 30.50(b)(2)(i) ACCID MIT EQUIP FAILS | | |IBBF 30.50(b)(2)(ii) EQUIP DISABLED/FAILS | | |IBBG 30.50(b)(2)(iii) REDUNDANT EQUIP INOP | | | | | | | | +------------------------------------------------+-----------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | SYNCOR INTERNATIONAL CORPORATION, WITH HEADQUARTERS AT 20001 PRAIRIE | | STREET, CHATSWORTH, CA 91311, IS MAKING A REPORT CONCERNING THE FAILURE OF | | A FUME HOOD AT THEIR NUCLEAR PHARMACY LOCATED IN TULSA, OKLAHOMA. | | | | A FUME HOOD USED AT THE NUCLEAR PHARMACY OF THE SYNCOR INTERNATIONAL CORP. | | FACILITY LOCATED AT 10205 EAST 61ST STREET SOUTH, SUITE E1, TULSA OKLAHOMA, | | FAILED. STORED INSIDE THE FUME HOOD WERE SEALED CONTAINERS OF XENON 133 | | (170 mCi) AND IODINE 131 (164 mCi). PERSONNEL WORKING IN THE AREA WERE | | EVACUATED. THE LICENSEE CONSERVATIVELY ESTIMATES A MAXIMUM LEAKAGE OF 85 | | uCi OF XENON 133 (SEALED VIALS) WITH NO IODINE LEAKAGE BASED ON A 24 HOUR | | CALCULATION INTO THE FUME HOOD AND CONTAINED VOLUME OF THE RESTRICTED AREA. | | THE COMPANY WHICH INSTALLED THE HOOD WAS CONTACTED AND DETERMINED THAT THE | | FAILURE WAS NOT MECHANICAL. A FURTHER INVESTIGATION DISCOVERED THAT THE | | FUME HOOD MOTOR HAD BURNED UP. A SPARE MOTOR WAS INSTALLED AND THE FUME | | HOOD RETURNED TO SERVICE IN APPROXIMATELY 13 HOURS. NO PERSONNEL EXPOSURES | | WERE REPORTED. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27359 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: SAINT LUCIE REGION: 2 |NOTIFICATION DATE: 06/06/94 | |UNIT: [1] [ ] [ ] STATE: FL |NOTIFICATION TIME: 17:23 [ET]| |RX TYPE: [1] CE,[2] CE |EVENT DATE: 06/06/94 | +------------------------------------------------+EVENT TIME: 15:08[EDT]| |NRC NOTIFIED BY: JAMES HURCHALLA |LAST UPDATE DATE: 06/06/94 | |HQ OPS OFFICER: STEVE SANDIN +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |JOHN POTTER 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 97 POWER OPERATION | 0 HOT STANDBY | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | UNIT 1 EXPERIENCED A REACTOR TRIP ON A LOSS OF LOAD FOLLOWING A GENERATOR | | LOCK OUT. | | | | "DURING A PERIOD OF HEAVY THUNDERSTORM ACTIVITY, A PIECE OF ALUMINUM | | FLASHING BLEW OFF A STORAGE BUILDING AND STRUCK THE UNIT 1 "1A" MAIN | | TRANSFORMER. THIS CAUSED A MAIN GENERATOR DIFFERENTIAL CURRENT TRIP WHICH | | PROVIDED A GENERATOR LOCKOUT TRIPPING THE TURBINE. THIS RESULTED IN A | | REACTOR TRIP AT 1508 DUE TO "TURBINE LOSS OF LOAD". STANDARD POST TRIP | | ACTIONS WERE PERFORMED AND ALL SAFETY FUNCTIONS WERE SATISFIED. THE UNIT | | WAS STABILIZED IN MODE 3 WITH HEAT REMOVAL VIA THE STEAM BYPASS CONTROL | | SYSTEM TO THE CONDENSER AND THE STEAM GENERATORS BEING FED FROM THE "1A" | | MAIN FEEDWATER PUMP. DUE TO THE NATURE OF THE TRANSIENT, SEVERAL | | NON-ESSENTIAL BREAKERS OPENED AND THE PLANT PHONE SYSTEM WAS TEMPORARILY | | OUT OF SERVICE FOR 30 MINUTES. THE PHONE SYSTEM HAS BEEN RESTORED AND ALL | | COMMUNICATIONS SYSTEMS ARE NORMAL." | | | | THE LICENSEE IS CURRENTLY INSPECTING THE "1A" MAIN TRANSFORMER FOR DAMAGE | | AND WILL MAINTAIN UNIT 1 IN MODE 3 PENDING A RESTART DATE. THE LICENSEE | | INFORMED THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27360 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: DRESDEN REGION: 3 |NOTIFICATION DATE: 06/06/94 | |UNIT: [ ] [ ] [3] STATE: IL |NOTIFICATION TIME: 20:51 [ET]| |RX TYPE: [1] GE-1,[2] GE-3,[3] GE-3 |EVENT DATE: 06/06/94 | +------------------------------------------------+EVENT TIME: 17:40[CDT]| |NRC NOTIFIED BY: TIM WOJTULEWICZ |LAST UPDATE DATE: 06/06/94 | |HQ OPS OFFICER: STEVE SANDIN +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |ROGER LANKSBURY RDO | |AESF 50.72(b)(2)(ii) ESF ACTUATION | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | | | | | | | | | 3 | N N 0 REFUELING | 0 REFUELING | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | UNIT 3 EXPERIENCED A GROUP 2 ISOLATION SIGNAL DURING POST MAINTENANCE VALVE | | TESTING DUE TO A PINCHED WIRE. | | | | "WHILE IN THE REFUELING MODE, RECEIVED A GROUP 2 ISOLATION SIGNAL WHEN THE | | AIR OPERATED VALVE (AOV) "3-1601-24" (DRYWELL VENT TO REACTOR BUILDING | | EXHAUST) WAS CYCLED FOR POST MAINTENANCE TEST. FUSE "2-595-720" WAS FOUND | | BLOWN AND BLEW AGAIN WHEN THIS VALVE WAS CYCLED FOR A SECOND TIME. | | ELECTRICAL MAINTENANCE DEPARTMENT (EMD) FOUND THAT THIS VALVE'S SOLENOID | | COVER HAD PINCHED THE ELECTRICAL TAPE ON A LUG. MOST GROUP 2 ISOLATION | | VALVES WERE OUT OF SERVICE AT THE TIME OF THIS EVENT, HOWEVER, DRYWELL AIR | | SAMPLE VALVES "3-8501-1B", "3-9205B", "3-9206B" AND "3-9207B" CLOSED. THE | | PINCHED WIRE WAS REPAIRED AND THE AOV "3-1601-24" SUCCESSFULLY CYCLED." | | | | THE LICENSEE WILL INFORM THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+