U.S. Nuclear Regulatory Commission Operations Center Event Reports For 02/14/95 - 02/15/95 ** EVENT NUMBERS ** 28382 28383 28384 28385 28386 28387 +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28382 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: PILGRIM REGION: 1 |NOTIFICATION DATE: 02/14/95 | |UNIT: [1] [ ] [ ] STATE: MA |NOTIFICATION TIME: 13:25 [ET]| |RX TYPE: [1] GE-3 |EVENT DATE: 02/14/95 | +------------------------------------------------+EVENT TIME: 12:55[EST]| |NRC NOTIFIED BY: MIKE JACOBS |LAST UPDATE DATE: 02/14/95 | |HQ OPS OFFICER: JOSEPH SEBROSKY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |ROBERT BORES RDO | |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 Y 100 POWER OPERATION | 100 POWER OPERATION | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | REACTOR CORE ISOLATION COOLING (RCIC) DECLARED INOPERABLE. | | | | AT 1255 THE LICENSEE HAD A RCIC INVERTER ANNUNCIATOR ALARM. THE INVERTER | | CONVERTS A DC SIGNAL TO AN AC SIGNAL FOR THE CONTROL CIRCUITRY. THE | | LICENSEE DECLARED RCIC INOPERABLE AND ENTERED A 14 DAY LCO. ALL ECCS ARE | | OPERABLE. THE LICENSEE IS INVESTIGATING THE PROBLEM. | | | | THE LICENSEE HAS INFORMED THE RESIDENT INSPECTOR AND WILL INFORM THE | | MASSACHUSETTS EMERGENCY MANAGEMENT AGENCY (MEMA) OF THE EVENT. | | | | ***UPDATE AT 22:41 2/14/95 FROM FALLACARA TAKEN BY SEBROSKY *** | | THE LICENSEE REPAIRED THE RCIC INVERTER, SUCCESSFULLY TESTED THE SYSTEM, | | AND EXITED THE LCO AT 22:38. THE LICENSEE WILL INFORM THE RESIDENT | | INSPECTOR. HOO NOTIFIED R1DO(BORES). | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28383 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: MILLSTONE REGION: 1 |NOTIFICATION DATE: 02/14/95 | |UNIT: [ ] [2] [ ] STATE: CT |NOTIFICATION TIME: 15:18 [ET]| |RX TYPE: [1] GE-3,[2] CE,[3] W-4-LP |EVENT DATE: 02/14/95 | +------------------------------------------------+EVENT TIME: 15:08[EST]| |NRC NOTIFIED BY: LARRY NELSON |LAST UPDATE DATE: 02/14/95 | |HQ OPS OFFICER: JOSEPH SEBROSKY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |ROBERT BORES RDO | |AIND 50.72(b)(2)(iii)(D) ACCIDENT MITIGATION | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | | | | | 2 | N N 0 REFUELING | 0 REFUELING | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | THE LICENSEE IDENTIFIED WIRING LEADING FROM ONE TRAIN OF AN ENGINEERED | | SAFETY FEATURES (ESF) CABINET LEADING TO THE OPPOSITE TRAIN'S CABINET. | | | | THE LICENSEE IDENTIFIED THE PROBLEM WHILE THEY WERE PERFORMING MAINTENANCE | | ON THE CABINETS. AT THIS TIME THE LICENSEE DOES NOT KNOW WHAT FUNCTION THE | | WIRE PERFORMS. THE LICENSEE IS ALSO TRYING TO DETERMINE IF THERE ARE | | ADDITIONAL WIRES CONNECTED BETWEEN THE TRAINS. | | | | THE UNIT IS CURRENTLY DEFUELED. BOTH CABINETS HAD BEEN PREVIOUSLY | | DEENERGIZED TO PERFORM THE MAINTENANCE, AND BOTH TRAINS OF ECCS ARE | | CURRENTLY INOPERABLE DUE TO PREPLANNED MAINTENANCE. SPENT FUEL POOL | | COOLING OPERATION IS NOT AFFECTED BY THE PROBLEM. ANY SYSTEM THAT WAS | | REQUIRED TO SUPPORT SPENT FUEL OPERATION WAS PLACED IN IT'S ACCIDENT | | CONDITION PRIOR TO STARTING THE PLANNED MAINTENANCE ON THE CABINETS. | | | | THE LICENSEE HAS INFORMED THE RESIDENT INSPECTOR, AND BECAUSE THEY MADE A | | REPORT TO THE OPERATIONS CENTER THEY HAVE ALSO INFORMED STATE OFFICIALS. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28384 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: INDIAN POINT REGION: 1 |NOTIFICATION DATE: 02/14/95 | |UNIT: [2] [ ] [ ] STATE: NY |NOTIFICATION TIME: 17:03 [ET]| |RX TYPE: [2] W-4-LP,[3] W-4-LP |EVENT DATE: 02/14/95 | +------------------------------------------------+EVENT TIME: 14:50[EST]| |NRC NOTIFIED BY: PHIL SANTINI |LAST UPDATE DATE: 02/14/95 | |HQ OPS OFFICER: JOSEPH SEBROSKY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |ROBERT BORES RDO | |NINF INFORMATION ONLY | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 2 | N N 0 REFUELING | 0 REFUELING | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | THE LICENSEE IS MAKING AN INFORMATION ONLY REPORT DUE TO THE FAILURE OF THE | | MANUAL CONTROL SWITCH FUNCTION FOR FOUR PHASE 'A' CONTAINMENT ISOLATION | | VALVES. | | | | THE FOLLOWING IS A TEXT OF A FACSIMILE FROM THE LICENSEE: | | | | "ON FEBRUARY 14, 1995 A 'SNEAK' CIRCUIT WAS IDENTIFIED IN THE CONTROL | | CIRCUITRY TO FOUR CONTAINMENT ISOLATION VALVES. A FAULTED RELAY RESULTED | | IN ENERGIZING THE COILS FOR THESE VALVES RESULTING IN THE VALVES REMAINING | | IN THE OPEN POSITION WITH THE MANUAL CONTROL SWITCH SELECTED TO CLOSE. THIS | | CIRCUIT WAS FOUND WHEN AN ATTEMPT TO CLOSE THE VALVES RESULTED IN THE | | VALVES REMAINING OPEN. TWO OF THE VALVES MAKE UP THE TRAIN 'A' AND 'B' | | ISOLATION VALVES FROM THE PRESSURIZER RELIEF TANK TO THE GAS ANALYZER AND | | TWO OF THE VALVES MAKE UP THE TRAIN 'A' AND 'B' ISOLATION FROM THE REACTOR | | COOLANT DRAIN TANK TO THE GAS ANALYZER. | | | | THIS 'SNEAK' CIRCUIT WOULD NOT PREVENT THE FULFILLMENT OF THE SAFETY | | FUNCTION OF THE CONTAINMENT ISOLATION VALVES TO CLOSE ON AN AUTOMATIC OR | | MANUAL CONTAINMENT ISOLATION SIGNAL. IN ADDITION IN RESPONSE TO AN | | ACCIDENT AN SAFETY INJECTION SIGNAL WOULD CAUSE STRIPING OF THE INSTRUMENT | | AIR POWER SUPPLY AND THE RESULTANT LOSS OF INSTRUMENT AIR WOULD CLOSE THE | | VALVES. | | | | THIS CONDITION IS BEING REPORTED TO THE NRC VOLUNTARILY IN ACCORDANCE WITH | | THE DRAFT NUREG 1022 GUIDANCE." END OF TEXT. | | | | THE DEFECTIVE RELAY WAS REPLACED AND MANUAL CONTROL SWITCH FUNCTION HAS | | BEEN RESTORED FOR THESE VALVES. THE TYPE OF CIRCUITRY THAT CONTRIBUTED TO | | THE PROBLEM DOES NOT EXIST IN ANY OTHER PHASE 'A' CONTAINMENT ISOLATION | | VALVES. THE LICENSEE IS CONTINUING TO INVESTIGATE THE PROBLEM AND | | CORRECTIVE ACTIONS. | | | | THE LICENSEE DESCRIBED THE 'SNEAK' CIRCUIT AS FOLLOWS: THE MAIN VALVE | | CONTROL CIRCUIT HAS COMING OFF OF IT A SECONDARY CIRCUIT THAT GOES TO | | ADDITIONAL CONTACTS. THE FAULTED RELAY CAUSED THE POSITIVE SIDE OF THE MAIN | | VALVE CONTROL CIRCUIT TO FEED BACK THROUGH THE NEGATIVE OF THE SECONDARY | | CIRCUIT WHICH FEED BACK THROUGH THE COIL OF THE SOLENOID VALVE. | | | | THE LICENSEE WILL INFORM THE RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28385 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: HADDAM NECK REGION: 1 |NOTIFICATION DATE: 02/15/95 | |UNIT: [1] [ ] [ ] STATE: CT |NOTIFICATION TIME: 00:42 [ET]| |RX TYPE: [1] W-4-LP |EVENT DATE: 02/15/95 | +------------------------------------------------+EVENT TIME: 00:30[EST]| |NRC NOTIFIED BY: BRUCE DANIELSON |LAST UPDATE DATE: 02/15/95 | |HQ OPS OFFICER: DOUG WEAVER +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |ROBERT BORES 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 REFUELING | 0 REFUELING | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | AGASTAT RELAYS FOUND TO EXCEED THEIR QUALIFIED LIFE | | | | MORE THAN ONE DOZEN AGASTAT RELAYS INSTALLED IN CATEGORY I EQUIPMENT HAVE | | BEEN FOUND WHICH HAVE EXCEEDED THEIR TEN YEAR QUALIFIED LIFE. THIS | | INFORMATION WAS DISCOVERED DURING A REVIEW OF VENDOR INFORMATION. THE | | NUMBER IS EXPECTED TO INCREASE AS THE REVIEW PROGRESSES. THE EARLIEST | | INSTALLATION DATE DISCOVERED TO THIS POINT IS 1980. | | | | THE LICENSEE IS EXPECTED TO BEGIN CORE RELOAD IN THREE DAYS. THE PLANT | | INDICATED THIS SCHEDULE MAY BE DELAYED BASED ON THIS EVENT. THE LICENSEE | | WILL INFORM THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28386 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: NINE MILE POINT REGION: 1 |NOTIFICATION DATE: 02/15/95 | |UNIT: [ ] [2] [ ] STATE: NY |NOTIFICATION TIME: 00:58 [ET]| |RX TYPE: [1] GE-2,[2] GE-5 |EVENT DATE: 02/14/95 | +------------------------------------------------+EVENT TIME: 21:12[EST]| |NRC NOTIFIED BY: TOM TUTTLE |LAST UPDATE DATE: 02/15/95 | |HQ OPS OFFICER: DOUG WEAVER +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |ROBERT BORES RDO | |ARPS 50.72(b)(2)(ii) RPS ACTUATION | | |AESF 50.72(b)(2)(ii) ESF ACTUATION | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | | | | | 2 | M/R Y 100 POWER OPERATION | 0 HOT SHUTDOWN | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | INADVERTENT LOSS OF 125 VDC POWER LEADS TO A MANUAL REACTOR SCRAM | | | | DIVISION I EMERGENCY 125 VDC POWER WAS MOMENTARILY LOST WHILE TRANSFERRING | | THE RESPECTIVE BATTERY CHARGERS. THE MOMENTARY LOSS OF DC CONTROL POWER | | CAUSED A TRIP OF BOTH REACTOR WATER RECIRCULATION PUMPS RESULTING IN | | NATURAL CIRCULATION CONDITIONS. A MANUAL REACTOR SCRAM WAS IMMEDIATELY | | PERFORMED PER PLANT OPERATING PROCEDURES. ALL CONTROL RODS INSERTED AND | | THE REACTOR IS SHUTDOWN. ALL SYSTEMS APPEAR TO HAVE FUNCTIONED AS | | EXPECTED, BUT INVESTIGATION CONTINUES. | | | | THE RECIRC PUMPS WERE RESTARTED IN SLOW SPEED. ESF ACTUATIONS OCCURRED FOR | | GROUP 8 & 9, PRIMARY CONTAINMENT OUTBOARD ISOLATION VALVE SIGNALS AND | | REACTOR BUILDING NORMAL VENTILATION ISOLATION DUE TO MOMENTARY LOSS OF | | DIVISION I DC POWER. THE REACTOR IS CURRENTLY STABLE IN HOT SHUTDOWN. | | RESTORATIONS ARE CONTINUING AND THE POST SCRAM REVIEW IS BEING PERFORMED. | | | | THE LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28387 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: LIMERICK REGION: 1 |NOTIFICATION DATE: 02/15/95 | |UNIT: [ ] [2] [ ] STATE: PA |NOTIFICATION TIME: 01:21 [ET]| |RX TYPE: [1] GE-4,[2] GE-4 |EVENT DATE: 02/14/95 | +------------------------------------------------+EVENT TIME: 23:12[EST]| |NRC NOTIFIED BY: GREG COLLINS |LAST UPDATE DATE: 02/15/95 | |HQ OPS OFFICER: DOUG WEAVER +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |ROBERT BORES 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 COLD SHUTDOWN | 0 COLD SHUTDOWN | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | ESF ACTUATION FOR UNKNOWN REASONS | | | | AT 2312 ON 2/14/95, WHILE UNIT 2 WAS IN A REFUEL OUTAGE, A 'B1' HALF SCRAM | | AND A GROUP 6C ISOLATION OCCURRED. THE SIGNAL WENT AWAY IMMEDIATELY AND | | THE HALF SCRAM WAS RESET. "THE GROUP 6C ISOLATION CAN BE RESET." NO MAIN | | CONTROL ROOM TESTING WAS IN PROGRESS THAT COULD HAVE CAUSED THIS. HOWEVER, | | AN IN SERVICE INSPECTION WAS IN PROGRESS ON AN INSTRUMENT RACK IN THE | | PLANT. THE INDIVIDUAL WAS ASKED IF HE TOUCHED OR BUMPED ANYTHING. HE | | REPLIED NEGATIVELY. INVESTIGATION CONTINUES. | | | | THE LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+