U.S. Nuclear Regulatory Commission Operations Center Event Reports For 06/11/96 - 06/12/96 ** EVENT NUMBERS ** 30357 30368 30535 30613 30614 30615 30616 30617 30618 30619 30620 !!!!!!!!! THIS EVENT HAS BEEN RETRACTED. THIS EVENT HAS BEEN RETRACTED !!!!!!! +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 30357 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: SEQUOYAH REGION: 2 |NOTIFICATION DATE: 04/24/96 | |UNIT: [ ] [2] [ ] STATE: TN |NOTIFICATION TIME: 21:08 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 04/24/96 | +------------------------------------------------+EVENT TIME: 17:41[EDT]| |NRC NOTIFIED BY: LEIB |LAST UPDATE DATE: 06/11/96 | |HQ OPS OFFICER: BOB STRANSKY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |LESSER 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 | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | CONTAINMENT PHASE B ISOLATION DURING COMPUTER MODIFICATIONS | | | | WITH CHANNEL I OF HI-HI CONTAINMENT PRESSURE MANUALLY TRIPPED TO SUPPORT | | COMPUTER SYSTEM MODIFICATIONS, AN INSTRUMENT RACK FOR CHANNEL III WAS | | REENERGIZED, CAUSING THE CHANNEL III HI-HI CONTAINMENT PRESSURE BISTABLE TO | | MOMENTARILY TRIP. COINCIDENT TRIPPING OF TWO BISTABLES SATISFIED THE LOGIC | | FOR A CONTAINMENT PHASE B ISOLATION. THE LICENSEE REPORTED THAT THE | | FOLLOWING SYSTEMS ISOLATED: CONTROL AIR TO CONTAINMENT, CONTAINMENT | | VENTILATION, CONTAINMENT RADIATION SAMPLING, ESSENTIAL RAW COOLING WATER, | | COMPONENT COOLING WATER, GLYCOL, AND RADIOACTIVE WASTEWATER DISPOSAL. ALL | | SYSTEMS FUNCTIONED AS EXPECTED. THE NRC RESIDENT INSPECTOR HAS BEEN | | INFORMED BY THE LICENSEE. | | | | ***UPDATE ON 06/11/96 @ 1430 BY HEITZMANN TO GOULD*** THE LICENSEE IS | | RETRACTING THIS EVENT, SINCE THEY DETERMINED THAT IT WAS NOT REPORTABLE | | AFTER FURTHER REVIEW. THE REVIEW CONCLUDED THAT THE HI-HI CONTAINMENT | | PRESSURE SIGNAL WAS NOT A VALID SIGNAL, SINCE CONTAINMENT PRESSURE WAS | | ATMOSPHERIC. THE SYSTEM INVOLVED WAS THE CONTAINMENT SYSTEM WHICH HAD BEEN | | PROCEDURALLY REMOVED FROM SERVICE BY OPENING ITS AIR LOCK DOORS. AS PER | | NUREG 1022, WHEN A SYSTEM IS NOT REQUIRED TO BE OPERABLE AND HAS BEEN | | PROPERLY REMOVED FROM SERVICE, AN INVALID ACTUATION OF PART OF THE SYSTEM | | IS NOT REPORTABLE. THE RI WAS INFORMED. RDO(JULIAN) WAS NOTIFIED. | +------------------------------------------------------------------------------+ !!!!!!!!! THIS EVENT HAS BEEN RETRACTED. THIS EVENT HAS BEEN RETRACTED !!!!!!! +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 30368 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: COOPER REGION: 4 |NOTIFICATION DATE: 04/25/96 | |UNIT: [1] [ ] [ ] STATE: NE |NOTIFICATION TIME: 20:07 [ET]| |RX TYPE: [1] GE-4 |EVENT DATE: 04/25/96 | +------------------------------------------------+EVENT TIME: 18:25[CDT]| |NRC NOTIFIED BY: JOHN MEYERS |LAST UPDATE DATE: 06/11/96 | |HQ OPS OFFICER: DICK JOLLIFFE +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |JOHN PELLET RDO | |AUNA 50.72(b)(1)(ii)(A) UNANALYZED COND OP | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |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 +------------------------------------------------------------------------------+ | -SAFETY LIMIT MINIMUM CRITICAL POWER RATIO (MCPR) MAY BE NON-CONSERVATIVE- | | | | GENERAL ELECTRIC, IN A LETTER DATED 4/22/96, INFORMED THE LICENSEE OF A | | NON-CONSERVATISM IN THE SAFETY LIMIT MCPR ANALYSIS. THIS CONCLUSION WAS | | BASED ON UNVERIFIED CALCULATIONS PERFORMED BY GENERAL ELECTRIC. THE SAFETY | | LIMIT MCPR IS NOW CALCULATED BY GE TO BE 1.07 AT THE END-OF-FUEL-CYCLE FOR | | 2 LOOP OPERATION. THE TECHNICAL SPECIFICATION SAFETY LIMIT FOR 2 LOOP | | OPERATION IS 1.06 AT END-OF-FUEL-CYCLE OPERATIONS. THEREFORE, THE EXISTING | | TECHNICAL SPECIFICATION SAFETY LIMIT MCPR MAY BE NONCONSERVATIVE BY 0.01 BY | | END-OF-FUEL-CYCLE. | | | | THE LICENSEE HAS ADMINISTRATIVELY SET THE SAFETY LIMIT MCPR AT 1.07 FOR | | 2 LOOP OPERATION AND 1.08 FOR SINGLE LOOP OPERATION. THE LICENSEE HAS | | INCREASED THE OPERATING MCPR LIMIT BY 0.01 IN THE PROCESS COMPUTER | | CALCULATION FOR MCPR. | | | | GE IDENTIFIED THAT THIS PROBLEM ALSO EXISTS AT RIVER BEND AND HOPE CREEK. | | | | THE LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. | | | | ***UPDATE ON 06/11/96 @ 17:14 FROM SMALLFOOT TO GOULD*** THE LICENSEE IS | | RETRACTING THIS EVENT. ON 5/16/96 GENERAL ELECTRIC PROVIDED THE LICENSEE | | WITH THE RESULTS OF A CYCLE-SPECIFIC ANALYSIS WHICH DETERMINED THAT THE | | TECHNICAL SPECIFICATION MINIMUM CRITICAL POWER RATIO VALUE OF 1.06 WOULD | | STILL BE CONSERVATIVE THROUGHOUT CYCLE 17 BASED ON THE ROD PATTERNS | | PROJECTED AT THAT TIME. THEREFORE, THE LICENSEE IS RETRACTING THIS | | NOTIFICATION. THE RI WAS NOTIFIED. RDO (PELLET) NOTIFIED | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 30535 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: SEABROOK REGION: 1 |NOTIFICATION DATE: 05/24/96 | |UNIT: [1] [ ] [ ] STATE: NH |NOTIFICATION TIME: 10:00 [ET]| |RX TYPE: [1] W-4-LP |EVENT DATE: 05/21/96 | +------------------------------------------------+EVENT TIME: 10:34[EDT]| |NRC NOTIFIED BY: LANCE FRITZ |LAST UPDATE DATE: 06/11/96 | |HQ OPS OFFICER: DICK JOLLIFFE +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |JACK DURR 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 +------------------------------------------------------------------------------+ | - TURBINE DRIVEN EMERGENCY FEEDWATER PUMP SEAL IMPROPERLY INSTALLED - | | | | DURING THE PERFORMANCE OF A QUARTERLY TECH SPEC SURVEILLANCE TEST OF THE | | TURBINE DRIVEN EMERGENCY FEEDWATER PUMP #1FWP-37A, SPARKS WERE OBSERVED | | EMANATING FROM THE OUTBOARD MECHANICAL SEAL AREA. CONTROL ROOM OPERATORS | | TRIPPED THE PUMP AND DECLARED IT INOPERABLE. | | | | THE LICENSEE DISASSEMBLED THE THE PUMP SEAL AND DETERMINED THAT THE SEAL | | HAD BEEN IMPROPERLY INSTALLED DURING THE LAST REFUELING OUTAGE(NOV/DEC 95). | | | | THIS CONDITION WAS NOT APPARENT DURING POST MAINTENANCE TESTS OR TECH SPEC | | SURVEILLANCE TESTS THAT WERE CONDUCTED SINCE DEC 95. | | | | AT 0915 ON 05/24/96, THE LICENSEE DETERMINED THIS EVENT TO BE REPORTABLE TO | | THE NRC. | | | | THE LICENSEE HAS REPAIRED THE PUMP, SATISFACTORILY TESTED IT, DECLARED IT | | OPERABLE, AND RESTORED IT TO SERVICE. | | | | THE LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. | | | | ***UPDATE ON 06/11/96 @ 12:45 BY DAVID TO GOULD*** THE LICENSEE PERFORMED | | FURTHER INSPECTIONS ON THE MOTOR DRIVEN EFW PUMP ON 6/4/96, AND SIMILAR | | ALIGNMENTS OF THE MECHANICAL SEALS WERE OBSERVED ON THIS PUMP. THIS | | SUGGESTS THAT THE PUMP WAS SUSCEPTIBLE TO THE SAME MECHANICAL RUBBING AS | | EXPERIENCED ON THE TURBINE DRIVEN PUMP. THE MOTOR DRIVEN EFW PUMP HAS BEEN | | REPAIRED AND RETURNED TO SERVICE. THE EVALUATION OF THIS EVENT IS | | CONTINUING. THE RI WILL BE INFORMED. REG 1 RDO(JENISON) WAS NOTIFIED. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 30613 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: MILLSTONE REGION: 1 |NOTIFICATION DATE: 06/11/96 | |UNIT: [1] [2] [3] STATE: CT |NOTIFICATION TIME: 04:03 [ET]| |RX TYPE: [1] GE-3,[2] CE,[3] W-4-LP |EVENT DATE: 06/11/96 | +------------------------------------------------+EVENT TIME: 00:33[EDT]| |NRC NOTIFIED BY: WARNOCK |LAST UPDATE DATE: 06/11/96 | |HQ OPS OFFICER: JOHN MacKINNON +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |KENNETH JENISON 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 N 0 COLD SHUTDOWN | 0 COLD SHUTDOWN | | 2 | N N 0 COLD SHUTDOWN | 0 COLD SHUTDOWN | | 3 | N N 0 COLD SHUTDOWN | 0 COLD SHUTDOWN | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | RADIO PAGER SYSTEM INOPERABLE FROM 0033 EDT UNTIL 0130 EDT DUE TO LOSS OF | | DC POWER SUPPLY. | | | | AT 1030 EDT ON 06/10/96, THE UNIT 2 AC POWER SUPPLY FOR THE RADIO PAGER | | SYSTEM TRIPPED OPEN. THE LICENSEE POWERED UP THE AC POWER SUPPLY FOR THE | | RADIO PAGER SYSTEM FROM UNIT 3. HOWEVER, THE LICENSEE FAILED TO RESET THE | | BATTERY CHARGERS WHICH SUPPORT THE DC PART OF THE RADIO PAGER SYSTEM. THE | | BATTERIES SUPPORTING THE RADIO PAGER SYSTEM LASTED UNTIL 0033 EDT, 06/11/96 | | AT WHICH TIME THE RADIO PAGER SYSTEM BECAME INOPERABLE. THE RADIO PAGER | | SYSTEM WAS DECLARED OPERABLE AGAIN AT 0130 EDT, 06/11/96 EDT. THE LICENSEE | | WILL NOTIFY THE STATE OF THIS EVENT. | | | | THE NRC RESIDENT INSPECTOR WAS INFORMED OF THIS EVENT. | | | | | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 30614 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: PERRY REGION: 3 |NOTIFICATION DATE: 06/11/96 | |UNIT: [1] [ ] [ ] STATE: OH |NOTIFICATION TIME: 09:30 [ET]| |RX TYPE: [1] GE-6 |EVENT DATE: 06/11/96 | +------------------------------------------------+EVENT TIME: 08:35[EDT]| |NRC NOTIFIED BY: M MLACHAK |LAST UPDATE DATE: 06/11/96 | |HQ OPS OFFICER: JOHN MacKINNON +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |BRUCE JORGENSEN RDO | |DDDD 73.71 UNSPECIFIED PARAGRAPH | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | N Y 3 STARTUP | 3 STARTUP | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | DISCOVERY OF DEROGATORY REMARKS AND THE SUBSEQUENT FOLLOW UP INVESTIGATION | | ON THE REMARKS LED TO A CONTRACT WORKER BEING LET GO AND HIS UNESCORTED | | ACCESS BEING REVOKED. THE CONTRACTOR WAS A STEEL WORKER. SECURITY IS | | REVIEWING THE PAST WORK ACTIVITIES OF THIS INDIVIDUAL. | | | | THE NRC RESIDENT INSPECTOR WAS INFORMED OF THIS EVENT BY THE LICENSEE. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 30615 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: SURRY REGION: 2 |NOTIFICATION DATE: 06/11/96 | |UNIT: [1] [ ] [ ] STATE: VA |NOTIFICATION TIME: 12:11 [ET]| |RX TYPE: [1] W-3-LP,[2] W-3-LP |EVENT DATE: 06/11/96 | +------------------------------------------------+EVENT TIME: 11:23[EDT]| |NRC NOTIFIED BY: WEBSTER |LAST UPDATE DATE: 06/11/96 | |HQ OPS OFFICER: CHAUNCEY GOULD +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |CAUDLE JULIAN RDO | |ASHU 50.72(b)(1)(i)(A) PLANT S/D REQD BY TS | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | N Y 100 POWER OPERATION | 75 POWER OPERATION | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | THE LICENSEE IS SHUTTING THE PLANT DOWN AS PER TS REQUIREMENT TO BE IN HOT | | S/D WITHIN 6 HRS. | | | | DURING THE PERFORMANCE OF MONTHLY REACTOR PROTECTION SURVEILLANCE TESTING | | IN ACCORDANCE WITH "1-PT-8.1", TRAIN "A" TURBINE TRIP RELAY "TT-XA" FAILED. | | AT THE TIME OF FAILURE, THE "A" REACTOR TRIP BYPASS BREAKER WAS CLOSED FOR | | TESTING THE "A" TRAIN CIRCUITS. A 2 HR TS TABLE 3-7-1 ITEM 18b OPERATION | | ACTION 8A WAS IN EFFECT AS OF 09:02 ON 6/11/96. THE 2 HOUR LCO WAS EXITED | | AT 10:20 FOLLOWING POSITIVE IDENTIFICATION OF THE FAILED RELAY. A 6 HOUR TO | | HOT SHUTDOWN LCO WAS ENTERED DUE TO THE "A" REACTOR TRIP BREAKER BEING IN | | THE OPEN POSITION. THE UNIT SHUTDOWN WAS INITIATED AT 11:23. THE PLANT IS | | RAMPING DOWN AT 1%/HR WHILE REPLACEMENT OF THE FAILED RELAY IS IN PROGRESS. | | THE RI WAS INFORMED. | | | | ***UPDATE ON 06/11/96 @ 13:34 BY WEBSTER TO GOULD*** THE RELAY HAS BEEN | | REPLACED AND SUCCESSFULLY TESTED. THE PLANT EXITED THE ACTION STATEMENT AT | | 13:20 AT 58% POWER AND STARTED RAMPING BACK TO 100% AT 13:26. THE RI WAS | | INFORMED. RDO JULIAN WAS NOTIFIED. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 30616 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: MILLSTONE REGION: 1 |NOTIFICATION DATE: 06/11/96 | |UNIT: [1] [ ] [ ] STATE: CT |NOTIFICATION TIME: 14:25 [ET]| |RX TYPE: [1] GE-3,[2] CE,[3] W-4-LP |EVENT DATE: 06/11/96 | +------------------------------------------------+EVENT TIME: 14:13[EDT]| |NRC NOTIFIED BY: DONOVAN |LAST UPDATE DATE: 06/11/96 | |HQ OPS OFFICER: CHAUNCEY GOULD +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |KENNETH JENISON 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 +------------------------------------------------------------------------------+ | THE LICENSEE DISCOVERED THAT THE PIPING FOR THE INSERT AND WITHDRAWAL OF | | THE CONTROL ROD DRIVES DOES NOT MEET THE SEISMIC DESIGN REQUIREMENTS. | | | | AN EVALUATION OF PIPING AND ASSOCIATED SUPPORTS FOR THE INSERT AND | | WITHDRAWAL OF THE CONTROL ROD DRIVE SYSTEM SHOWS THAT SEISMIC DESIGN | | CRITERION AS SPECIFIED IN THE FSAR FOR CLASS 1 EQUIPMENT IS NOT MET. THEY | | DID DEMONSTRATE, HOWEVER, THAT THE SYSTEM MET OPERABILITY LIMITS, WHICH ARE | | CONSISTENT WITH THE CURRENT DAY CRITERION SET FORTH IN NRC GENERIC LETTER | | 91-18. CORRECTIVE ACTION IS TO UPGRADE THE PIPING SYSTEM TO MEET THE DESIGN | | BASIS REQUIREMENTS. THE RI WAS NOTIFIED ALONG WITH STATE AND LOCAL | | AGENCIES. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 30617 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: MILLSTONE REGION: 1 |NOTIFICATION DATE: 06/11/96 | |UNIT: [1] [ ] [ ] STATE: CT |NOTIFICATION TIME: 16:39 [ET]| |RX TYPE: [1] GE-3,[2] CE,[3] W-4-LP |EVENT DATE: 06/11/96 | +------------------------------------------------+EVENT TIME: 16:20[EDT]| |NRC NOTIFIED BY: DONOVAN |LAST UPDATE DATE: 06/11/96 | |HQ OPS OFFICER: CHAUNCEY GOULD +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |KENNETH JENISON RDO | |AINC 50.72(b)(2)(iii)(C) POT UNCNTRL RAD REL | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |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 +------------------------------------------------------------------------------+ | THE LICENSEE DETERMINED THAT THEY HAD BOTH TRAINS OF STANDBY GAS TREATMENT | | SYSTEM INOPERABLE. | | | | ON 06/08/96 AT 13:58, UNIT 1 EXPERIENCED A SMALL FIRE IN THE DRYWELL. THIS | | FIRE WAS EXTINGUISHED AT 14:01 WITH A DRY-CHEMICAL AGENT FIRE EXTINGUISHER. | | THE COMBINATION OF THE FIRE GASES AND DRY-CHEMICAL AGENT IN THE DRYWELL | | ATMOSPHERE CAUSED BOTH TRAINS OF THE STANDBY GAS TREATMENT SYSTEM TO BE | | INOPERABLE. AT THE TIME OF THE FIRE, THE UNIT WAS IN A TECHNICAL | | SPECIFICATION LIMITING CONDITION OF OPERATION (LCO) BECAUSE THE RADIATION | | MONITORS, WHICH INITIATE THE STANDBY GAS TREATMENT SYSTEM, WERE INOPERABLE. | | THE LCO REQUIRES BOTH TRAINS OF STANDBY GAS TREATMENT BE RUNNING | | CONTINUOUSLY. DUE TO THE SMOKE AND DRY-CHEMICAL AGENT, OPERATING THE | | STANDBY GAS TREATMENT SYSTEM IN THAT TYPE OF ENVIRONMENT WOULD HAVE IMPEDED | | IT FROM PERFORMING ITS INTENDED FUNCTION. THE SMOKE AND THE DRY-CHEMICAL | | HAS BEEN DISPERSED AND ONE TRAIN OF STANDBY GAS TREATMENT HAS BEEN RETURNED | | TO OPERABLE STATUS. THE EVENT WAS DETERMINED TO BE REPORTABLE AT 16:20. THE | | RI WILL BE INFORMED. STATE AND LOCAL AGENCIES HAVE BEEN NOTIFIED. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 30618 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: DIABLO CANYON REGION: 4 |NOTIFICATION DATE: 06/11/96 | |UNIT: [1] [ ] [ ] STATE: CA |NOTIFICATION TIME: 19:45 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 06/11/96 | +------------------------------------------------+EVENT TIME: 16:27[PDT]| |NRC NOTIFIED BY: ANDERSON |LAST UPDATE DATE: 06/11/96 | |HQ OPS OFFICER: CHAUNCEY GOULD +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |JOHN PELLET 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 2 STARTUP | 2 STARTUP | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | THE LICENSEE DISCOVERED THAT A SINGLE FAILURE COULD POTENTIALLY AFFECT THE | | OPERABILITY OF ALL THREE AUXILIARY FEEDWATER PUMPS. | | | | THIS CONDITION WAS CAUSED WHEN A VENTILATION PATH HAD INADVERTENTLY BEEN | | BLOCKED WITH A STEEL PLATE. THIS VENTILATION PATH, WHICH IS FROM THE | | TURBINE DRIVEN AFW PUMP ROOM, IS CREDITED IN THE ANALYSIS FOR A CRACK IN AN | | AUXILIARY STEAM LINE IN THE AFW PUMP ROOM. BLOCKAGE OF THE VENT PATH COULD | | CAUSE THE ENVIRONMENT IN THE TURBINE DRIVEN AFW PUMP ROOM AND THE MOTOR | | DRIVEN AFW PUMP ROOM TO EXCEED THE SPECIFICATIONS ASSUMED IN THE STEAM LINE | | BREAK ANALYSIS. FROM THE TIME THE VENT PATH WAS BLOCKED TO WHEN THE PLATE | | WAS REMOVED, A POTENTIAL EXISTED FOR ALL THREE PUMPS(DESIGNED FOR MILD | | ENVIRONMENT) IN THE AUXILIARY FEEDWATER TO BE CALLED UPON TO OPERATE IN A | | HARSH ENVIRONMENT. BOTH PUMP ROOMS, HOWEVER, ARE COVERED BY A ONE HOUR | | ROVING FIRE WATCH AND HAVE A CLASS 2 TEMPERATURE ALARM SYSTEM INSTALLED | | THAT WOULD HAVE DETECTED ANY STEAM LEAK SIGNIFICANT ENOUGH TO AFFECT THE | | OPERABILITY OF THE PUMPS. THE LICENSEE IS STILL INVESTIGATING WHEN THE VENT | | PATH WAS BLOCKED. THE RI WAS INFORMED. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 30619 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: HADDAM NECK REGION: 1 |NOTIFICATION DATE: 06/11/96 | |UNIT: [1] [ ] [ ] STATE: CT |NOTIFICATION TIME: 20:53 [ET]| |RX TYPE: [1] W-4-LP |EVENT DATE: 06/11/96 | +------------------------------------------------+EVENT TIME: 20:12[EDT]| |NRC NOTIFIED BY: NEVELOS |LAST UPDATE DATE: 06/11/96 | |HQ OPS OFFICER: CHAUNCEY GOULD +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |KENNETH JENISON 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 +------------------------------------------------------------------------------+ | THE LICENSEE DISCOVERED THAT THERE IS A POSSIBILITY THAT THE FEEDWATER | | REGULATING VALVE MAY NOT SHUT FOR A STEAMLINE BREAK IN CONTAINMENT. | | | | THE FEEDWATER REGULATING VALVE MAY NOT SHUT AS REQUIRED DURING A STEAMLINE | | BREAK IN CONTAINMENT, BECAUSE HIGH DIFFERENTIAL PRESSURE MAY OVERCOME THE | | SPRING PRESSURE TO PREVENT FULL CLOSURE. CONTAINMENT PRESSURE COULD EXCEED | | ANALYZED VALUES ASSUMING SINGLE ACTIVE FAILURE OF THE FEEDWATER ISOLATION | | MOV. TO CORRECT THIS CONDITION, A PROPOSED CHANGE TO THE EMERGENCY | | PROCEDURES TO SHUT OFF THE FEED PUMP MOTORS IN THE EVENT OF A STEAMLINE | | BREAK WILL BE MADE. THE RI WAS NOTIFIED ALONG WITH STATE AND LOCAL | | AGENCIES. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 30620 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: QUAD CITIES REGION: 3 |NOTIFICATION DATE: 06/11/96 | |UNIT: [1] [2] [ ] STATE: IL |NOTIFICATION TIME: 21:02 [ET]| |RX TYPE: [1] GE-3,[2] GE-3 |EVENT DATE: 06/11/96 | +------------------------------------------------+EVENT TIME: 18:20[CDT]| |NRC NOTIFIED BY: SCOTT |LAST UPDATE DATE: 06/11/96 | |HQ OPS OFFICER: CHAUNCEY GOULD +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |BRUCE JORGENSEN 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 | | 2 | N N 0 COLD SHUTDOWN | 0 COLD SHUTDOWN | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | THE LICENSEE DISCOVERED THAT THE STRUCTURAL STEEL PLATFORMS OVER THE | | DRYWELL EQUIPMENT HATCH DO NOT CONFORM TO DESIGN DRAWINGS. | | | | WHILE PERFORMING AN ENGINEERING WALKDOWN, IT WAS DISCOVERED THAT THE | | STRUCTURAL STEEL PLATFORMS CROSSING OVER EACH UNIT'S DRYWELL EQUIPMENT | | HATCH DID NOT CONFORM TO DESIGN DRAWINGS. SUBSEQUENT ENGINEERING REVIEWS | | COULD NOT CONCLUSIVELY DETERMINE THAT THE STRUCTURAL STEEL PLATFORMS MEET | | UFSAR ALLOWABLE STRESS LIMITS. THE POTENTIAL WOULD EXIST FOR PRIMARY | | CONTAINMENT DEGRADATION DURING A SEISMIC EVENT. REPAIR ACTIVITIES HAVE BEEN | | INITIATED FOR BOTH UNITS. THE RI WAS INFORMED. | +------------------------------------------------------------------------------+