U.S. Nuclear Regulatory Commission Operations Center Event Reports For 07/29/94 - 08/01/94 ** EVENT NUMBERS ** 27570 27605 27606 27607 27608 27609 27610 27611 27612 !!!!!!!!! THIS EVENT HAS BEEN RETRACTED. THIS EVENT HAS BEEN RETRACTED !!!!!!! +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27570 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: VOGTLE REGION: 2 |NOTIFICATION DATE: 07/24/94 | |UNIT: [ ] [2] [ ] STATE: GA |NOTIFICATION TIME: 04:45 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 07/23/94 | +------------------------------------------------+EVENT TIME: 18:38[EDT]| |NRC NOTIFIED BY: RUSHTON |LAST UPDATE DATE: 07/29/94 | |HQ OPS OFFICER: DICK JOLLIFFE +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |FLOYD CANTRELL RDO | |ASHU 50.72(b)(1)(i)(A) PLANT S/D REQD BY TS | | |NLCO TECH SPEC LCO A/S | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | | | | | 2 | N N 0 HOT STANDBY | 0 COLD SHUTDOWN | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | -UNIT 2 SHUTDOWN TO REPAIR RCS DRAIN VLV SOCKET WELD PRESSURE BOUNDARY LEAK | | | | ON 07/23/94, WITH UNIT 2 AT 100% POWER, LICENSEE DETERMINED THAT THE CLOSED | | REACTOR COOLANT SYSTEM LOOP 3 INTERMEDIATE LEG DRAIN VALVE (#2-1201-U4-030) | | WAS LEAKING. | | | | AFTER INSPECTING THE VALVE WITH A CAMERA MOUNTED ON A ROBOT, LICENSEE | | DETERMINED THAT THE VALVE WAS LEAKING THROUGH ITS PACKING AND THAT THIS | | UNIDENTIFIED LEAK RATE WAS LESS THAN 0.3 GPM. TECH SPEC UNIDENTIFIED LEAK | | RATE LIMIT IS 1.0 GPM. | | | | AT 0820 ON 07/23/94, LICENSEE BEGAN TO SHUT UNIT 2 DOWN FROM 100% POWER TO | | REMOVE THE LAGGING AROUND THE VALVE, INSPECT THE VALVE, & REPAIR THE LEAK. | | | | AT 1629 ON 07/23/94, UNIT 2 ENTERED MODE 3 (HOT STANDBY). | | | | AT 1838 ON 07/23/94, AFTER REMOVING THE LAGGING AROUND THE VALVE AND | | INSPECTING THE LEAK, LICENSEE DETERMINED THAT THE VALVE SOCKET WELD WAS | | LEAKING AND CLASSIFIED THE LEAK AS A REACTOR COOLANT SYSTEM PRESSURE | | BOUNDARY LEAK. | | | | TECH SPEC LCO A/S 3.4.6.2.a REQUIRES LICENSEE TO PLACE UNIT 2 IN AT LEAST | | HOT STANDBY MODE WITHIN 6 HOURS OF DETERMINING ANY REACTOR COOLANT SYSTEM | | PRESSURE BOUNDARY LEAKAGE AND COLD SHUTDOWN MODE WITHIN THE FOLLOWING 30 | | HOURS. | | | | AT 0415 ON 07/24/94, LICENSEE DETERMINED THIS EVENT TO BE REPORTABLE TO | | THE NRC AS A 10CFR50.72 ONE HOUR TECH SPEC REQUIRED PLANT SHUTDOWN REPORT. | | | | AT 0419 ON 07/24/94, UNIT 2 ENTERED MODE 5 (COLD SHUTDOWN). | | | | LICENSEE WILL REPAIR THE VALVE AND ESTIMATES RESTARTING UNIT 2 ON 07/28/94. | | | | LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. | | | | ***RETRACTION BY CHESTNUT TO HUFFMAN AT 1804 EDT ON 7/29/94 *** | | THE FOLLOWING RETRACTION STATEMENT WAS MADE BY THE LICENSEE: | | "THE ONE HOUR NOTIFICATION PER 10 CFR 50.72(b)(1)(i)(A) WAS MADE ON | | 7-23-94. THE INFORMATION TRANSMITTED IN THAT REPORT SHOULD NOW BE | | CONSIDERED TO BE OF A VOLUNTARY NATURE RATHER THAN A REQUIRED REPORT. WITH | | THE UNIT 2 REACTOR SHUTDOWN IN MODE 3(HOT STANDBY), PERSONNEL DISCOVERED | | PRESSURE BOUNDARY LEAKAGE IN A REACTOR COOLANT SYSTEM DRAIN LINE WELD | | ADJACENT TO A DRAIN VALVE. THIS LEAKAGE HAD BEEN PREVIOUSLY EVALUATED AS | | NON-PRESSURE BOUNDARY LEAKAGE BETWEEN THE BODY AND BONNET OF THE DRAIN | | VALVE AND THE PLANT HAD EARLIER COMPLETED A VOLUNTARY SHUT DOWN TO MAKE | | REPAIRS. SUBSEQUENTLY, AFTER THE SHUTDOWN, THE LEAKAGE WAS RECLASSIFIED AS | | PRESSURE BOUNDARY LEAKAGE. PERSONNEL THEN RETROACTIVELY CONSIDERED THE | | SHUTDOWN AS HAVING BEEN REQUIRED BY TECH SPECS. HOWEVER, SINCE THE SHUTDOWN | | WAS NOT INITIATED DUE TO TECH SPEC REQUIREMENTS, AND THE PLANT ALREADY | | SHUTDOWN WHEN THE PRESSURE BOUNDARY DETERMINATION MADE, NO IMMEDIATE | | NOTIFICATION WAS REQUIRED BY 10 CFR 50.72." | | | | THE NRC RESIDENT INSPECTOR HAS BEEN BRIEFED ON THIS RETRACTION. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27605 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: BIG ROCK POINT REGION: 3 |NOTIFICATION DATE: 07/29/94 | |UNIT: [1] [ ] [ ] STATE: MI |NOTIFICATION TIME: 06:47 [ET]| |RX TYPE: [1] GE-1 |EVENT DATE: 07/29/94 | +------------------------------------------------+EVENT TIME: 05:53[EDT]| |NRC NOTIFIED BY: MIKE RUHLMAN |LAST UPDATE DATE: 07/29/94 | |HQ OPS OFFICER: JOSEPH SEBROSKY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: UNUSUAL EVENT +-----------------------------+ |10 CFR SECTION: |ROBERT DEFAYETTE RDO | |AAEC 50.72(a)(1)(i) EMERGENCY DECLARED |JOHN ZWOLINSKI EO | | |BELCHER FEMA | | |AL CHAFFEE EO | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | N Y 87 POWER OPERATION | 87 POWER OPERATION | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | THE LICENSEE HAD A SMALL FIRE THAT LASTED LESS THAN 10 MINUTES. | | | | WHILE A CONTROL ROOM OPERATOR WAS DOING A ROUTINE TOUR OF THE PLANT HE | | NOTICED A SMALL FIRE ON TOP OF THE HIGH PRESSURE FEEDWATER HEATER LAGGING | | IN THE PIPE TUNNEL. THE FIRE BRIGADE RESPONDED AND PUT OUT THE FIRE | | IMMEDIATELY. THE FIRE WAS SMALL (ABOUT THE SIZE OF A FIST) AND LIMITED TO | | THE LAGGING FOR THE HIGH PRESSURE FEEDWATER HEATER. | | | | THE LICENSEE IS INVESTIGATING THE CAUSE OF THE FIRE. AT THIS TIME THE | | LICENSEE BELIEVES THE FIRE WAS CAUSED BY OIL LEAKING ONTO THE LAGGING FOR | | THE HIGH PRESSURE FEEDWATER HEATER. THE LICENSEE IS STILL TRYING TO | | DETERMINE THE SOURCE OF THE OIL. (THERE ARE SOME MAIN TURBINE LUBE OIL AND | | CONTROL OIL LINES IN THE VICINITY). THE OIL IS STILL DRIPPING IN THE AREA | | AND HAS BEEN CONTAINED. THE LICENSEE IS MONITORING THE AREA WITH A REMOTE | | CAMERA. | | | | AN OFFSITE FIRE DEPARTMENT WAS CALLED BUT DID NOT HAVE TO RESPOND TO THE | | SCENE. THE LICENSEE DID NOT DECLARE AN EMERGENCY BECAUSE THE FIRE WAS | | EXTINGUISHED WITHIN 10 MINUTES OF ITS DISCOVERY. | | | | THE LICENSEE HAS INFORMED THE RESIDENT INSPECTOR. | | | | | | ***UPDATE FROM LICENSEE:BOURASSA TO NRC:HUFFMAN AT 12:38 EDT ON 7/29/94*** | | | | THE LICENSEE HAS UPGRADED THIS EVENT NOTIFICATION BY DECLARING A | | "DISCRETIONARY" UNUSUAL EVENT. THE OIL WAS DETERMINED TO BE COMING FROM A | | KNOWN LEAK ON THE #2 TURBINE BEARING. THE LEAK WAS BEING MANAGED BY A | | COLLECTION SYSTEM WHICH CAPTURED THE OIL IN A DRIP TRAY AND DRAINED IT TO A | | COLLECTION DRUM. APPARENTLY, THE COLLECTION RIG IS NOT WORKING PROPERLY AND | | OIL IS DRIPPING ONTO THE SURROUNDING PIPE LAGGING AND STRUCTURE WHICH COULD | | POSE AN ONGOING FIRE HAZARD. THE LICENSEE SAID THERE IS ALSO EVIDENCE THAT | | THE INITIAL FIRE MAY HAVE BEEN BURNING A WHILE BEFORE IT WAS DISCOVERED | | ALTHOUGH NO ADDITIONAL DAMAGE OTHER THAN TO THE LAGGING IS EVIDENT. | | | | THE LICENSEE HAS DECIDED TO SHUTDOWN AND CLEAN UP ANY OIL SOAKED LAGGING | | AND CORRECT THE PROBLEM ON THE LEAKING COLLECTION RIG. POWER LEVEL IS | | CURRENTLY 30% AND DECREASING. TERMINATION OF THE UE WILL BE BASED ON | | JUDGMENT THAT THE OIL RELATED FIRE HAZARD IS NO LONGER PRESENT. | | | | APPROPRIATE STATE AND LOCAL AUTHORITIES HAVE BEEN NOTIFIED. THE RESIDENT | | INSPECTOR IS INFORMED. | | | | *** UPDATE FROM AZURE TO HUFFMAN AT 2120 EDT ON 7/29/94 *** | | THE UNUSUAL EVENT WAS EXITED AT 2110 EDT BASED ON MITIGATION OF THE OIL | | FIRE HAZARD. THE REACTOR HAS BEEN SHUTDOWN AND IS ON SHUTDOWN COOLING AT A | | PRESSURE OF 250 PSI. THE OIL COLLECTION RIG UNDER THE LEAKING BEARING HAS | | BEEN MODIFIED TO ENSURE ALL OIL LEAKAGE IS COLLECTED. THE FEEDWATER HEATER | | WITH THE OIL SOAKED LAGGING IS OUT OF SERVICE AND COOLED DOWN TO THE POINT | | WHERE IGNITION OF OIL IS NO LONGER A CONCERN. | | | | THE LICENSEE PLANS TO REMAIN IN HOT SHUTDOWN WHILE IT STRIPS THE OIL SOAKED | | LAGGING OFF THE FEEDWATER HEATER SOMETIME TOMORROW. CLEANUP OF ANY OTHER | | AREAS WHERE OIL MAY HAVE DRIPPED WILL ALSO BE ACCOMPLISHED. METHODS OF | | FURTHER MINIMIZING THE TURBINE BEARING OIL LEAK WILL BE INVESTIGATED AS | | WELL. RESTART IS PLANNED SOMETIME ON MONDAY. | | | | THE RESIDENT INSPECTOR, STATE AND LOCAL OFFICIALS HAVE BEEN INFORMED. | | EO(ZWOLINSKI); R3DO(DEFAYETTE) AND FEMA(SULIVAN) HAVE ALSO BEEN NOTIFIED. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27606 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: OYSTER CREEK REGION: 1 |NOTIFICATION DATE: 07/29/94 | |UNIT: [1] [ ] [ ] STATE: NJ |NOTIFICATION TIME: 13:57 [ET]| |RX TYPE: [1] GE-2 |EVENT DATE: 07/29/94 | +------------------------------------------------+EVENT TIME: 13:15[EDT]| |NRC NOTIFIED BY: GLENN HUTTON |LAST UPDATE DATE: 07/29/94 | |HQ OPS OFFICER: WILLIAM HUFFMAN +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |WALTER PASCIAK 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 +------------------------------------------------------------------------------+ | REACTOR WATER CLEANUP (RWCU) CONTAINMENT ISOLATION VALVE NOT WIRED | | CORRECTLY. | | | | RWCU CONTAINMENT ISOLATION VALVE V-16-14 IS CURRENTLY NOT WIRED IN | | ACCORDANCE WITH THE MANUFACTURER'S RECOMMENDATION. THIS IS A DC MOTOR | | OPERATED VALVE WHICH IS SUPPLIED FROM THE 125 VOLT DC BUS "B". THE VALVE IS | | CURRENTLY WIRED TO OPERATE QUICKLY BUT AT A REDUCED THRUST. THIS CONDITION | | MAY RESULT IN INSUFFICIENT THRUST BEING DEVELOPED BY THE MOTOR OPERATOR TO | | ENSURE FULL CLOSURE UNDER DC BATTERY END OF LIFE CONDITIONS (e.g., REDUCE | | VOLTAGE AFTER BATTERY DEPLETION). | | | | THE SCENARIO IN QUESTION WOULD INVOLVE A LOSS OF OFFSITE POWER. WHEN THE | | THE EMERGENCY DIESEL GENERATORS TIES ONTO THE EMERGENCY BUSES, THE NORMAL | | BATTERY CHARGERS DOES NOT GET SEQUENCED AUTOMATICALLY BACK ONTO THE | | EMERGENCY BUSES. CURRENTLY, THEY MUST BE MANUALLY LOADED. THE LICENSEE'S | | EVALUATION HAS SHOWN THAT BATTERY VOLTAGE MAY DROP TO AS LOW AS 117 VOLTS | | WITHIN A RELATIVELY SHORT PERIOD OF TIME WITHOUT THE CHARGER. AT 117 VOLTS, | | THE CLOSING THRUST OF THE RWCU ISOLATION VALVE MAY NOT BE SUFFICIENT TO | | PROVIDE CONTAINMENT ISOLATION. | | | | FOR IMMEDIATE CORRECTIVE ACTION, THE LICENSEE HAS DESIGNATED THE BACKUP | | BATTERY CHARGER FOR THE "B" BUS AS THE PRIMARY CHARGER. THIS IS BECAUSE THE | | BACKUP CHARGER CURRENTLY DOES GET AUTOMATICALLY SEQUENCED ONTO THE | | EMERGENCY BUS UPON A LOSS OF OFFSITE POWER CONDITION. THIS SHOULD PREVENT | | THE DC BUS VOLTAGE FROM DROPPING SIGNIFICANTLY UPON A LOSS OF OFFSITE | | POWER. LONG TERM CORRECTIVE ACTION IS STILL UNDER EVALUATION. THE RWCU | | CONTAINMENT ISOLATION VALVE HAS NOT BEEN DECLARED INOPERABLE. | | | | APPROPRIATE STATE AND LOCAL AUTHORITIES HAVE BEEN NOTIFIED. THE NRC | | INSPECTOR WILL BE NOTIFIED. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27607 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: HADDAM NECK REGION: 1 |NOTIFICATION DATE: 07/29/94 | |UNIT: [1] [ ] [ ] STATE: CT |NOTIFICATION TIME: 14:48 [ET]| |RX TYPE: [1] W-4-LP |EVENT DATE: 07/29/94 | +------------------------------------------------+EVENT TIME: 14:34[EDT]| |NRC NOTIFIED BY: JOHN STANFORD |LAST UPDATE DATE: 07/29/94 | |HQ OPS OFFICER: WILLIAM HUFFMAN +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |WALTER PASCIAK 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 | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | SEISMIC CONCERNS OVER REACTOR COOLANT PUMP WORK PLATFORMS. | | | | AN ENGINEERING EVALUATION HAS REVEALED THAT NON-SEISMIC WORK PLATFORMS | | MOUNTED NEAR THE TOP OF THE REACTOR COOLANT PUMP MOTORS COULD FALL DURING A | | SEISMIC EVENT AND DAMAGE CATEGORY 1 COMPONENTS BELOW SUCH AS SAFETY | | INJECTION VALVE CABLING AND REACTOR COOLANT PUMP OIL SYSTEMS. | | | | THE PLATFORMS WILL BE APPROPRIATELY RESTRAINED PRIOR TO RESTART. | | | | THE NRC RESIDENT INSPECTOR, STATE AND LOCAL OFFICIALS HAVE BEEN INFORMED. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27608 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: FT CALHOUN REGION: 4 |NOTIFICATION DATE: 07/29/94 | |UNIT: [1] [ ] [ ] STATE: NE |NOTIFICATION TIME: 16:15 [ET]| |RX TYPE: [1] CE |EVENT DATE: 07/29/94 | +------------------------------------------------+EVENT TIME: 13:00[CDT]| |NRC NOTIFIED BY: MATT POHL |LAST UPDATE DATE: 07/29/94 | |HQ OPS OFFICER: THOMAS ANDREWS +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |IAN BARNES 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 | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | AT 1300 CDT, THE CONTROL ROOM WAS NOTIFIED OF A PERSONNEL INJURY THAT | | OCCURRED ON FORT CALHOUN STATION'S OWNER CONTROLLED AREA. THIS IS A 4 HOUR | | REPORT PER 10 CFR 50.72(B)(D)(VI) SINCE MEDIA ATTENTION IS EXPECTED. THE | | INJURY DID NOT OCCUR IN A RADIATION CONTROL AREA AND DID NOT OCCUR INSIDE | | THE PROTECTED AREA. | | | | A CONTRACT INDIVIDUAL WAS UNLOADING 161-KV ALUMINUM POLES FROM A TRACTOR- | | TRAILER WHICH IS LOCATED OUTSIDE THE PROTECTED AREA (SOUTH OF THE PLANT'S | | SWITCHYARD). ONE OF THE POLES APPEARS TO HAVE ROLLED OFF THE TRUCK AND | | CRUSHED THE INDIVIDUAL'S LOWER LEG. EMERGENCY MEDICAL TECHNICIANS WERE | | DISPATCHED AND THEN NOTIFIED THE CONTROL ROOM THAT THEY WERE REQUESTING A | | LIFE FLIGHT HELICOPTER. THE HELICOPTER ARRIVED AT 1315 CDT AND DEPARTED AT | | 1326 CDT. | | | | THE LICENSEE HAS NOTIFIED THE NRC RESIDENT INSPECTOR. A PRESS RELEASE WILL | | BE MADE. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27609 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: VERMONT YANKEE REGION: 1 |NOTIFICATION DATE: 07/29/94 | |UNIT: [1] [ ] [ ] STATE: VT |NOTIFICATION TIME: 16:45 [ET]| |RX TYPE: [1] GE-4 |EVENT DATE: 07/29/94 | +------------------------------------------------+EVENT TIME: 16:38[EDT]| |NRC NOTIFIED BY: MIKE MCKENNEY |LAST UPDATE DATE: 07/30/94 | |HQ OPS OFFICER: WILLIAM HUFFMAN +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |WALTER PASCIAK 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 80 POWER OPERATION | 80 POWER OPERATION | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | THE LICENSEE WAS NOTIFIED THAT THE "AIMES HILL TRANSMITTER" WAS OUT OF | | SERVICE. THIS DEVICE IS USED TO PROVIDE EMERGENCY MESSAGES TO THE LOCAL | | POPULATION. THE CAUSE OF THE OUTAGE IS UNKNOWN. REPAIRS ARE IN PROGRESS. | | | | THE NRC RESIDENT, STATE, AND LOCAL AUTHORITIES WILL BE INFORMED BY THE | | LICENSEE. | | | | * * * UPDATE AT 0118 EDT ON 7/30/94 BY BROOKS TAKEN BY WEAVER * * * | | THE AIMES HILL TRANSMITTER WAS RETURNED TO SERVICE AT 0053 EDT. | | HOO NOTIFIED RDO (PASCIAK). | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27610 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: PERRY REGION: 3 |NOTIFICATION DATE: 07/29/94 | |UNIT: [1] [ ] [ ] STATE: OH |NOTIFICATION TIME: 18:45 [ET]| |RX TYPE: [1] GE-6 |EVENT DATE: 07/29/94 | +------------------------------------------------+EVENT TIME: 17:07[EDT]| |NRC NOTIFIED BY: MIKE NEMCEK |LAST UPDATE DATE: 07/29/94 | |HQ OPS OFFICER: WILLIAM HUFFMAN +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |ROBERT DEFAYETTE 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 COLD SHUTDOWN | 0 COLD SHUTDOWN | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | AUTO-START OF ANNULUS EXHAUST GAS TREATMENT SYSTEM FAN. | | | | THE "B" TRAIN ANNULUS EXHAUST GAS TREATMENT SYSTEM FAN WAS IN SERVICE WHEN | | THE INPUT SIGNAL FOR THE RECIRCULATION DAMPER CONTROLLER FAILED. THIS | | CAUSED THE "B" RECIRC DAMPER TO CLOSE. A SUBSEQUENT INCREASE IN SYSTEM | | DELTA P CAUSED A LOW FLOW ON THE "B" TRAIN SYSTEM WHICH CAUSED THE "A" | | TRAIN TO AUTO-START. THIS RESPONSE IS EXPECTED AND THE ACTUATION FUNCTIONED | | AS REQUIRED. | | | | THE PROBLEM WAS TRACED TO A FAILED SIGNAL SELECTION CARD. REPAIRS ARE IN | | PROGRESS. | | | | THE NRC RESIDENT INSPECTOR HAS BEEN NOTIFIED. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27611 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: DRESDEN REGION: 3 |NOTIFICATION DATE: 07/29/94 | |UNIT: [ ] [2] [3] STATE: IL |NOTIFICATION TIME: 23:08 [ET]| |RX TYPE: [1] GE-1,[2] GE-3,[3] GE-3 |EVENT DATE: 07/29/94 | +------------------------------------------------+EVENT TIME: 21:30[CDT]| |NRC NOTIFIED BY: TIM WOGTULEWICZ |LAST UPDATE DATE: 07/29/94 | |HQ OPS OFFICER: WILLIAM HUFFMAN +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |ROBERT DEFAYETTE RDO | |AOUT 50.72(b)(1)(ii)(B) OUTSIDE DESIGN BASIS | | |ADAS 50.72(b)(2)(i) DEG/UNANALYZED COND | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | | | | | 2 | N Y 51 POWER OPERATION | 51 POWER OPERATION | | 3 | N N 0 COLD SHUTDOWN | 0 COLD SHUTDOWN | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | TWO CONTROL ROD DRIVE MECHANISM SCREWS OVER TORQUED. | | | | AN ENGINEERING REVIEW HAS DETERMINED THAT THE FLANGE CAP SCREWS ON ONE | | CONTROL ROD DRIVE MECHANISM ON UNIT 2 (H7) AND ON ONE MECHANISM ON UNIT 3 | | (A6) EXCEED ASME CODE ALLOWABLE STRESSES. MAINTENANCE PRACTICE AT THE PLANT | | ALLOWED THESE BOLTS TO BE TORQUED UP TO 500 FT-LBS TO STOP LEAKS DURING | | REACTOR HYDROSTATIC TESTING. SUBSEQUENT ANALYSIS HAS NOW DETERMINED THAT | | THIS TORQUE VALUE IS TOO HIGH. THE FLANGE CAP SCREWS ON THE TWO MECHANISMS | | CITED WERE TORQUED TO THIS LIMIT. NO OTHER MECHANISMS ARE AFFECTED. | | | | ENGINEERING ANALYSIS HAS ALSO DETERMINED THAT THE BOLT YIELD STRENGTH WILL | | NOT BE EXCEEDED UNDER ALL ACCIDENT CONDITIONS. CONSEQUENTLY, THE CONTROL | | ROD DRIVE ON OPERATING UNIT 2 (H7) IS CONSIDERED OPERABLE. THE BOLTS ON | | THIS MECHANISM WILL BE CHANGED OUT DURING THE NEXT OUTAGE OF SUFFICIENT | | DURATION. THE BOLTS ON THE UNIT 3 MECHANISM (A6) WILL BE CHANGED BEFORE | | RESTART. | | | | ALL CALCULATIONS ARE PRELIMINARY. | | | | THE NRC RESIDENT INSPECTOR HAS BEEN NOTIFIED. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27612 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: BYRON REGION: 3 |NOTIFICATION DATE: 07/30/94 | |UNIT: [ ] [2] [ ] STATE: IL |NOTIFICATION TIME: 07:33 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 07/30/94 | +------------------------------------------------+EVENT TIME: 06:18[CDT]| |NRC NOTIFIED BY: DAVID LYON |LAST UPDATE DATE: 07/30/94 | |HQ OPS OFFICER: DOUG WEAVER +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |ROBERT DEFAYETTE 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 | +-----+----------+-------+--------+-----------------+--------+-----------------+ | | | | | 2 | N Y 99 POWER OPERATION | 99 POWER OPERATION | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | THE PROCESS COMPUTER HAS BEEN LOST FOR TWO HOURS AS OF 0618 CDT. TROUBLE | | SHOOTING EFFORTS ARE UNDERWAY. NO ESTIMATED TIME TO REPAIR WAS AVAILABLE. | | | | THE LICENSEE WILL INFORM THE NRC RESIDENT INSPECTOR. | | | | * * * UPDATE AT 1117 EDT ON 7/30/94 BY LYON TAKEN BY WEAVER * * * | | THE PLANT COMPUTER WAS RESTORED TO SERVICE AT 0800 CDT TODAY. | | HOO NOTIFIED RDO (DEFAYETTE). | +------------------------------------------------------------------------------+