U.S. Nuclear Regulatory Commission Operations Center Event Reports For 11/29/94 - 11/30/94 ** EVENT NUMBERS ** 28082 28083 28084 28085 28086 28087 28088 +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28082 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: SEQUOYAH REGION: 2 |NOTIFICATION DATE: 11/29/94 | |UNIT: [1] [ ] [ ] STATE: TN |NOTIFICATION TIME: 08:16 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 11/29/94 | +------------------------------------------------+EVENT TIME: 07:13[EST]| |NRC NOTIFIED BY: RUSSELL |LAST UPDATE DATE: 11/29/94 | |HQ OPS OFFICER: CHAUNCEY GOULD +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |DAVID MCGUIRE 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 +------------------------------------------------------------------------------+ | THE PLANT HAD A REACTOR TRIP FROM 100% POWER DUE TO A MAIN TURBINE TRIP. | | | | THE CAUSE OF THE MAIN TURBINE TRIP IS BEING INVESTIGATED, BUT IT IS | | SUSPECTED THAT IT MAY HAVE BEEN DUE TO AN ELECTRICAL SPIKE IN THE MAIN | | CONDENSER VACUUM TRIP CIRCUIT. ALL RODS FULLY INSERTED, NO SAFETY RELIEF | | VALVES LIFTED AND NO SAFETY INJECTION OCCURRED. THE CURRENT HEAT SINK IS | | THE MAIN CONDENSER AND THE PLANT IS IN STABLE CONDITION IN MODE 3. THE RI | | HAS BEEN INFORMED. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28083 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: BIG ROCK POINT REGION: 3 |NOTIFICATION DATE: 11/29/94 | |UNIT: [1] [ ] [ ] STATE: MI |NOTIFICATION TIME: 17:40 [ET]| |RX TYPE: [1] GE-1 |EVENT DATE: 11/29/94 | +------------------------------------------------+EVENT TIME: 15:30[EST]| |NRC NOTIFIED BY: MIKE BOURASSA |LAST UPDATE DATE: 11/29/94 | |HQ OPS OFFICER: WILLIAM HUFFMAN +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |MONTE PHILLIPS 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 | M/R Y 50 POWER OPERATION | 0 HOT SHUTDOWN | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | MANUAL SCRAM FOLLOWING LOSS OF FEEDWATER. | | | | A NORMAL POWER ASCENSION FOLLOWING A 58 DAY REFUELING OUTAGE WAS IN | | PROGRESS. ONE OF TWO CONDENSATE PUMPS AND ONE OF TWO FEEDWATER PUMPS WERE | | IN SERVICE. THE PUMP CASING OF THE SHUTDOWN CONDENSATE PUMP WAS BEING | | FILLED AND VENTED PRIOR TO STARTING IT. THE CASING VENT PIPING FROM BOTH | | CONDENSATE PUMPS SHARE A COMMON HEADER TO THE CONDENSER. SOMEHOW, AIR FROM | | VENTING OF THE SHUTDOWN CONDENSATE PUMP CASING WAS SUCKED BACK INTO THE | | OPERATING CONDENSATE PUMP CAUSING SOME CAVITATION. THIS RESULTED IN A LOW | | SUCTION PRESSURE TRIP ON THE ONLY OPERATING FEEDWATER PUMP. BECAUSE THE | | FEEDWATER PUMP COULD NOT BE RESTARTED QUICKLY, THE LICENSEE DECIDED TO | | MANUALLY SCRAM THE REACTOR PRIOR TO RECEIVING A LOW REACTOR WATER LEVEL | | AUTOMATIC TRIP. | | | | ALL RODS FULLY INSERTED. ALL SYSTEMS FUNCTIONED AS REQUIRED. DECAY HEAT IS | | CURRENTLY BEING DISCHARGED TO THE CONDENSER AND NORMAL FEEDWATER HAS BEEN | | RE-ESTABLISHED. THE REACTOR IS STABLE AT 500 PSI AND BEING PREPARED TO GO | | ONTO SHUTDOWN COOLING. THERE WERE NO COMPLICATIONS DURING THE TRANSIENT AND | | NO SAFETY RELIEF VALVES LIFTED. | | | | THE LICENSEE PLANS TO REMAIN SHUTDOWN FOR A ONE OR TWO DAY MIN-OUTAGE PRIOR | | TO RESTART. THE NRC RESIDENT INSPECTOR HAS BEEN NOTIFIED. | | | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28084 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: CATAWBA REGION: 2 |NOTIFICATION DATE: 11/29/94 | |UNIT: [1] [2] [ ] STATE: SC |NOTIFICATION TIME: 17:48 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 11/29/94 | +------------------------------------------------+EVENT TIME: 09:30[EST]| |NRC NOTIFIED BY: TOWER |LAST UPDATE DATE: 11/29/94 | |HQ OPS OFFICER: WILLIAM HUFFMAN +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |CHARLES HOSEY RDO | |NLTR LICENSEE 24 HR REPORT | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |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 Y 100 POWER OPERATION | 100 POWER OPERATION | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | VIOLATION OF LICENSE CONDITION FOR FIRE BARRIER INSPECTIONS. | | | | THE LICENSEE COMMITTED TO A SURVEILLANCE OF ALL EXPOSED SURFACES OF "FIRE | | RATED ASSEMBLIES" (FIRE BARRIERS) EVERY 18 MONTHS TO ASSURE TOTAL FIRE | | BARRIER INTEGRITY. THIS ESSENTIALLY INVOLVES INSPECTIONS FOR UNAUTHORIZED | | PENETRATIONS OR DEGRADATIONS OF FIRE WALLS. ON SEPTEMBER 12, 1994, THE 18 | | MONTH SURVEILLANCE PERIOD PLUS GRACE TIME EXPIRED. SINCE THE INSPECTION WAS | | NOT COMPLETED IN THE REQUIRED TIME FRAME, A VIOLATION OF LICENSE CONDITION | | OCCURRED REQUIRING THIS REPORT AND A 30 DAY WRITTEN FOLLOWUP REPORT. | | | | THE MISSED SURVEILLANCE WAS DISCOVERED DURING A REVIEW OF FIRE PROGRAM | | REQUIREMENTS BY THE FIRE PROTECTION ENGINEER. THE INSPECTION HAS JUST BEEN | | COMPLETED WITH NO KNOWN DISCREPANCIES DISCOVERED. THE ROOT CAUSE FOR | | MISSING THE SURVEILLANCE IS STILL UNDER INVESTIGATION. | | | | THE NRC RESIDENT INSPECTOR HAS BEEN NOTIFIED. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28085 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: HATCH REGION: 2 |NOTIFICATION DATE: 11/29/94 | |UNIT: [1] [2] [ ] STATE: GA |NOTIFICATION TIME: 18:05 [ET]| |RX TYPE: [1] GE-4,[2] GE-4 |EVENT DATE: 11/29/94 | +------------------------------------------------+EVENT TIME: 15:30[CST]| |NRC NOTIFIED BY: JIM ANDERSON |LAST UPDATE DATE: 11/29/94 | |HQ OPS OFFICER: WILLIAM HUFFMAN +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |CHARLES HOSEY 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 Y 100 POWER OPERATION | 100 POWER OPERATION | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | ENVIRONMENTAL PERMIT LIMITS FOR RIVER DISCHARGE EXCEEDED. | | | | THE STATE ENVIRONMENTAL PERMIT FOR RIVER DISCHARGE LIMITS WERE EXCEEDED | | LAST WEEK FOR TWO PARAMETERS. ZINC CONCENTRATION FROM THE UNIT 2 COOLING | | TOWER OVERFLOW AND OIL/GREASE LEVELS FROM THE DEMINERALIZER BACKWASH FILTER | | WERE BOTH DETERMINED TO HAVE EXCEEDED PERMIT LIMITS BASED ON LABORATORY | | RESULTS WHICH WERE RECEIVED TODAY FROM SAMPLES COLLECTED DURING THE | | DISCHARGES. | | | | THE LICENSEE IS INVESTIGATING THE CAUSE OF THE PERMIT VIOLATIONS. THE | | APPROPRIATE STATE AUTHORITIES WILL BE NOTIFIED TOMORROW. | | | | THE NRC RESIDENT INSPECTOR HAS BEEN INFORMED. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28086 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: FITZPATRICK REGION: 1 |NOTIFICATION DATE: 11/29/94 | |UNIT: [1] [ ] [ ] STATE: NY |NOTIFICATION TIME: 18:36 [ET]| |RX TYPE: [1] GE-4 |EVENT DATE: 11/29/94 | +------------------------------------------------+EVENT TIME: 17:00[EST]| |NRC NOTIFIED BY: FRANK DEVENEY |LAST UPDATE DATE: 11/29/94 | |HQ OPS OFFICER: WILLIAM HUFFMAN +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |LAWRENCE DOERFLEIN 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 Y 34 POWER OPERATION | 34 POWER OPERATION | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | SIX CONTAINMENT ISOLATION VALVES SHUT DURING AN ELECTRICAL PERTURBATION. | | | | WHILE CONDUCTING A NORMAL REACTOR SHUTDOWN FOR A REFUELING OUTAGE, | | ELECTRICAL BUSES WERE BEING TRANSFERRED FROM NORMAL TO RESERVE POWER. | | DURING TRANSFER OF THE 10-400 BUS (NON-VITAL 4160 VOLT), THE OPERATOR | | OPENED THE NORMAL BREAKER BEFORE SHUTTING THE RESERVE BREAKER. THIS | | RESULTED IN A MOMENTARY PARTIAL LOSS OF THE BUS. THE VOLTAGE TRANSIENT | | CAUSED SIX PRIMARY CONTAINMENT ISOLATION VALVES TO CLOSE IN THE DIVISION | | "B" SYSTEMS. THE CLOSED VALVES ISOLATED ONE OF TWO DRYWELL ATMOSPHERE | | SAMPLERS AND SEVERAL TORUS TO DRYWELL PRESSURE SENSORS. | | | | THE AFFECTED PRIMARY CONTAINMENT SYSTEM VALVES HAVE BEEN RETURNED TO | | NORMAL. DURING THE ELECTRICAL TRANSIENT, THE "B" EMERGENCY DIESEL GENERATOR | | "SOAK BACK" OIL PUMP BREAKER TRIPPED RESULTING IN THE DIESEL BEING DECLARED | | INOPERABLE AND PLACING THE PLANT IN A SEVEN DAY TECH SPEC LCO. THE LICENSEE | | BELIEVES THE EDG WOULD HAVE STILL OPERATED PROPERLY HAD IT BEEN NEEDED EVEN | | WITH THE TRIPPED "SOAK BACK" OIL PUMP. | | | | THE NRC RESIDENT INSPECTOR HAS BEEN INFORMED. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28087 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: COMANCHE PEAK REGION: 4 |NOTIFICATION DATE: 11/30/94 | |UNIT: [1] [ ] [ ] STATE: TX |NOTIFICATION TIME: 00:44 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 11/29/94 | +------------------------------------------------+EVENT TIME: 21:20[CST]| |NRC NOTIFIED BY: MIKE SMITH |LAST UPDATE DATE: 11/30/94 | |HQ OPS OFFICER: DOUG WEAVER +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |ELMO COLLINS RDO | |AESF 50.72(b)(2)(ii) ESF ACTUATION | | |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 ON LOW COOLING WATER FLOW IN THE MAIN TURBINE GENERATOR STATOR | | | | UNIT 1 RECEIVED A 2 OUT OF 2 MAIN GENERATOR STATOR LOW FLOW TRIP. THIS | | CAUSED A TURBINE AND REACTOR TRIP. ALL RODS FULLY INSERTED. AUXILIARY | | FEED STARTED AND IS CURRENTLY MAINTAINING STEAM GENERATOR LEVELS. STEAM IS | | BEING DUMPED TO THE MAIN CONDENSER AS NECESSARY TO REMOVE DECAY HEAT. | | | | THE CAUSE OF THE LOW WATER FLOW SIGNALS HAVE NOT BEEN DETERMINED. | | | | THE LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28088 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: FT CALHOUN REGION: 4 |NOTIFICATION DATE: 11/30/94 | |UNIT: [1] [ ] [ ] STATE: NE |NOTIFICATION TIME: 06:12 [ET]| |RX TYPE: [1] CE |EVENT DATE: 11/30/94 | +------------------------------------------------+EVENT TIME: 05:01[CST]| |NRC NOTIFIED BY: TERRY REISDORFF |LAST UPDATE DATE: 11/30/94 | |HQ OPS OFFICER: DOUG WEAVER +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: UNUSUAL EVENT +-----------------------------+ |10 CFR SECTION: |ELMO COLLINS RDO | |AAEC 50.72(a)(1)(i) EMERGENCY DECLARED |WILLIAM TRAVERS EO | |ASHU 50.72(b)(1)(i)(A) PLANT S/D REQD BY TS |BELCHER FEMA | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | N Y 100 POWER OPERATION | 99 POWER OPERATION | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | UNUSUAL EVENT DECLARED BASED ON TECH SPEC REQUIRED SHUTDOWN | | | | AT 2116 ON 11/29/94 THE PLANT ENTERED AN 8 HOUR LCO WHEN A FUSE BLEW ON | | INVERTER B OF THE VITAL 120 VAC POWER SYSTEM. THE BYPASS TRANSFORMER | | CLOSED IN TO SUPPLY THE 120 VAC BUS. THE LICENSEE HAS BEEN UNABLE TO | | LOCATE THE SHORT ON THE INVERTER B. THE LICENSEE DECLARED AN UNUSUAL EVENT | | AT 0501 CST WHEN THEY BEGAN REDUCING POWER 5-6% PER HOUR. TECH SPEC | | 2.7.2.H ALLOWS 12 HOURS TO REACH HOT SHUTDOWN. THE INVERTER IS REQUIRED TO | | BE OPERABLE ABOVE 300 DEGREES F. | | | | THE LICENSEE INTENDS TO CONTINUE TROUBLE-SHOOTING DURING THE POWER | | REDUCTION. | | | | THE LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+