U.S. Nuclear Regulatory Commission Operations Center Event Reports For 11/30/94 - 12/01/94 ** EVENT NUMBERS ** 28067 28087 28088 28089 28090 28091 28092 28093 +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28067 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: VERMONT YANKEE REGION: 1 |NOTIFICATION DATE: 11/24/94 | |UNIT: [1] [ ] [ ] STATE: VT |NOTIFICATION TIME: 10:03 [ET]| |RX TYPE: [1] GE-4 |EVENT DATE: 11/24/94 | +------------------------------------------------+EVENT TIME: 09:30[EST]| |NRC NOTIFIED BY: BRYAN CROKE |LAST UPDATE DATE: 11/30/94 | |HQ OPS OFFICER: DOUG WEAVER +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |DAVID MCGUIRE 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 +------------------------------------------------------------------------------+ | LOSS OF COMMUNICATION CAPABILITY | | | | THE LICENSEE REPORTED THE LOSS OF THE NUCLEAR ALERT SYSTEM PHONE LINK TO | | THE STATE OF NEW HAMPSHIRE. THE IS A MICROWAVE PHONE SYSTEM. A BACKUP | | LAND LINE IS AVAILABLE AND HAS BEEN TESTED. THE STATES OF VERMONT AND | | MASSACHUSETTS WERE ALSO NOTIFIED. | | | | *** UPDATE FROM MAY TO HUFFMAN AT 13:17 EST ON 11/30/94 *** | | THE NUCLEAR ALERT PHONE SYSTEM TO THE STATE OF NEW HAMPSHIRE WAS RESTORED | | ON 11/25/94 AT 08:00 EST. THE R1DO(DOERFLEIN) 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 HAS 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 B INVERTER. THE LICENSEE DECLARED AN UNUSUAL EVENT | | AT 0501 CST WHEN THEY BEGAN REDUCING POWER AT A RATE OF 5 TO 6% PER HOUR. | | TECH SPEC 2.7.2.H ALLOWS 12 HOURS TO REACH HOT SHUTDOWN. THE INVERTER IS | | REQUIRED TO BE OPERABLE WHEN THE REACTOR IS ABOVE 300 øF. | | | | THE LICENSEE INTENDS TO CONTINUE TROUBLE-SHOOTING DURING THE POWER | | REDUCTION. | | | | THE LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. | | | | * * * UPDATE AT 0830 EST BY REISDORFF TAKEN BY WEAVER * * * | | UNUSUAL EVENT TERMINATED AT 0730 EST. INVERTER B WAS REPAIRED AND DECLARED | | OPERABLE AT 0650 CST. POWER WAS AT 94% WHEN THE UE WAS TERMINATED. HOO | | NOTIFIED RDO (COLLINS); EO (DENNIG); FEMA (MOSTELLER). | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28089 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: MILLSTONE REGION: 1 |NOTIFICATION DATE: 11/30/94 | |UNIT: [ ] [2] [ ] STATE: CT |NOTIFICATION TIME: 14:44 [ET]| |RX TYPE: [1] GE-3,[2] CE,[3] W-4-LP |EVENT DATE: 11/30/94 | +------------------------------------------------+EVENT TIME: 14:18[EST]| |NRC NOTIFIED BY: TED DUBAY |LAST UPDATE DATE: 11/30/94 | |HQ OPS OFFICER: WILLIAM HUFFMAN +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |LAWRENCE DOERFLEIN RDO | |APRE 50.72(b)(2)(vi) OFFSITE NOTIFICATION | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | | | | | 2 | N N 0 REFUELING | 0 REFUELING | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | OFFSITE NOTIFICATION OF MINOR OIL SPILL. | | | | A SMALL TRANSFORMER ON SITE WAS OBSERVED TO BE LEAKING OIL AT THE RATE OF | | ABOUT ONE DROP PER MINUTE. THE OIL WAS LEAKING ONTO THE GROUND BENEATH THE | | TRANSFORMER SUPPORT PAD. THE TOTAL AMOUNT OF LEAKAGE HAS NOT BEEN | | DETERMINED BUT COULD BE OVER 10 GALLONS. THE OIL DOES NOT CONTAIN PCBs. | | | | THE LEAK IS CURRENTLY BEING MANAGED WITH ABSORBENT SOAKING PADS. THE | | TRANSFORMER WILL BE REPLACED AND ANY CONTAMINATED DIRT REMOVED. | | | | THE LICENSEE HAS NOTIFIED STATE AND LOCAL AUTHORITIES AND THE DEPARTMENT OF | | TRANSPORTATION. THE NRC RESIDENT INSPECTOR HAS ALSO BEEN INFORMED. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28090 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: DAVIS BESSE REGION: 3 |NOTIFICATION DATE: 11/30/94 | |UNIT: [1] [ ] [ ] STATE: OH |NOTIFICATION TIME: 14:56 [ET]| |RX TYPE: [1] B&W-R-LP |EVENT DATE: 11/30/94 | +------------------------------------------------+EVENT TIME: 14:00[EST]| |NRC NOTIFIED BY: LARRY MEEKS |LAST UPDATE DATE: 11/30/94 | |HQ OPS OFFICER: WILLIAM HUFFMAN +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |MONTE PHILLIPS RDO | |DDDD 73.71 UNSPECIFIED PARAGRAPH | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | N Y 98 POWER OPERATION | 98 POWER OPERATION | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | CONTRACT EMPLOYEE FALSIFIED EMPLOYMENT RECORDS. | | | | A CONTRACT LABORER WAS PERMITTED UNESCORTED ACCESS TO THE PROTECTED AND | | VITAL AREAS ON SITE ON SEPTEMBER 15, 1994, BASED ON RESPONSES TO A | | PRE-EMPLOYMENT QUESTIONNAIRE. UPON RECEIPT OF A ROUTINE FOLLOW-UP SECURITY | | CHECK ON NOVEMBER 29, 1994, THE LICENSEE DETERMINED THAT THE INITIAL | | INFORMATION PROVIDED BY THE EMPLOYEE WAS FALSE. THE INDIVIDUAL'S SITE | | ACCESS HAS BEEN TERMINATED. THE LICENSEE WILL ALSO REVIEW WORK PERFORMED | | BY THE INDIVIDUAL. | | | | THE NRC RESIDENT INSPECTOR HAS BEEN NOTIFIED. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28091 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: TURKEY POINT REGION: 2 |NOTIFICATION DATE: 11/30/94 | |UNIT: [ ] [4] [ ] STATE: FL |NOTIFICATION TIME: 16:28 [ET]| |RX TYPE: [3] W-3-LP,[4] W-3-LP |EVENT DATE: 11/30/94 | +------------------------------------------------+EVENT TIME: 15:42[EST]| |NRC NOTIFIED BY: STEVE SHAFFER |LAST UPDATE DATE: 11/30/94 | |HQ OPS OFFICER: WILLIAM HUFFMAN +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |CHARLES HOSEY RDO | |ARPS 50.72(b)(2)(ii) RPS ACTUATION | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | | | | | 4 | A/R Y 100 POWER OPERATION | 0 HOT STANDBY | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | REACTOR TRIP FOLLOWING GENERATOR LOCKOUT. | | | | A REACTOR TRIP FROM FULL POWER WAS EXPERIENCED WHEN A MAIN GENERATOR GROUND | | LOCKOUT RELAY ACTUATED. ALL RODS FULLY INSERTED AND THE REACTOR IS STABLE | | AT NORMAL HOT STANDBY TEMPERATURE AND PRESSURE. THERE WERE NO | | COMPLICATIONS DURING THE TRANSIENT FOLLOWING THE TRIP. AFW STARTED AS | | EXPECTED. NO PRIMARY OR SECONDARY SAFETIES LIFTED. NORMAL FEED TO THE | | STEAM GENERATORS HAS BEEN RE-ESTABLISHED. THE MSIVs WERE CLOSED TO PREVENT | | EXCESSIVE COOLDOWN, CONSEQUENTLY, DECAY HEAT IS BEING DISCHARGED TO THE | | ATMOSPHERE. | | | | THE CAUSE OF THE GENERATOR LOCKOUT IS UNDER INVESTIGATION. THE LICENSEE | | PLANS TO REMAIN IN MODE 3 UNTIL THE INVESTIGATION IS COMPLETE. | | | | THE NRC RESIDENT INSPECTOR HAS BEEN INFORMED. NO OTHER NOTIFICATIONS ARE | | PLANNED. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28092 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: VERMONT YANKEE REGION: 1 |NOTIFICATION DATE: 11/30/94 | |UNIT: [1] [ ] [ ] STATE: VT |NOTIFICATION TIME: 21:30 [ET]| |RX TYPE: [1] GE-4 |EVENT DATE: 11/30/94 | +------------------------------------------------+EVENT TIME: 20:55[EST]| |NRC NOTIFIED BY: MIKE McKENNY |LAST UPDATE DATE: 11/30/94 | |HQ OPS OFFICER: WILLIAM HUFFMAN +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |LAWRENCE DOERFLEIN 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 | 100 POWER OPERATION | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | SMALL LEAK ON SERVICE WATER SYSTEM PIPE. | | | | DURING A ROUTINE VISUAL SURVEILLANCE, A SMALL LEAK WAS DISCOVERED ON A | | FOUR-INCH SERVICE WATER SYSTEM LINE WHICH BYPASSES THE RBCCW HEAT | | EXCHANGERS. SINCE THE LINE IS COMMON TO BOTH SERVICE WATER SUBSYSTEMS, | | BOTH SERVICE WATER SUBSYSTEMS HAVE BEEN DECLARED INOPERABLE. | | | | COINCIDENTALLY, THE ALTERNATE COOLING SYSTEM WAS ALREADY OUT OF SERVICE FOR | | MAINTENANCE WORK ON AN RHR SERVICE WATER PUMP. WITH BOTH SERVICE WATER | | SUBSYSTEMS INOPERABLE AND ALTERNATE COOLING INOPERABLE, THE LICENSEE IS IN | | A TECH SPEC REQUIRED SHUTDOWN CONDITION. TECH SPEC 3.5.D.4 REQUIRES THAT | | THE UNIT BE PLACED IN COLD SHUTDOWN WITHIN 24 HOURS. | | | | THE LICENSEE HAS CHARACTERIZED THE SERVICE WATER PIPE LEAK AS A PIN HOLE. | | AN ENGINEERING EVALUATION IS CURRENTLY IN PROGRESS. REPAIR OPTIONS WILL BE | | ASSESSED AFTER THE RESULTS OF THE EVALUATION ARE AVAILABLE. THE LICENSEE IS | | ALSO LOOKING AT RESTORING THE ALTERNATE COOLING SYSTEM TO OPERABILITY WHICH | | WOULD TAKE THEM OUT OF THE TECH SPEC SHUTDOWN CONDITION. | | | | IF THE LICENSEE ACTUALLY BEGINS TO DECREASE POWER TO COMPLY WITH THIS TECH | | SPEC, THEN AN UNUSUAL EVENT WILL BE DECLARED. | | | | THE VERMONT DEPARTMENT OF PUBLIC SERVICE AND THE NRC RESIDENT INSPECTOR | | WILL BE NOTIFIED. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28093 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: WATERFORD REGION: 4 |NOTIFICATION DATE: 11/30/94 | |UNIT: [3] [ ] [ ] STATE: LA |NOTIFICATION TIME: 23:23 [ET]| |RX TYPE: [3] CE |EVENT DATE: 11/30/94 | +------------------------------------------------+EVENT TIME: 21:30[CST]| |NRC NOTIFIED BY: RON FRANCIS |LAST UPDATE DATE: 11/30/94 | |HQ OPS OFFICER: WILLIAM HUFFMAN +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: | | |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 | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 3 | N Y 100 POWER OPERATION | 100 POWER OPERATION | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | WASTE DISCHARGE MADE WITH INCORRECT RADIATION MONITOR SETTING. | | | | EIGHT DISCHARGES OF THE WASTE CONDENSATE TANK WERE MADE BETWEEN 11/17/94 | | AND 11/28/94. THESE DISCHARGES ARE MONITORED BY A RADIATION DETECTOR WHICH | | CONFIRMS THAT THE RADIATION LEVELS OF THE EFFLUENT ARE SUFFICIENTLY LOW AND | | DO NOT EXCEED ANY LIMITS. OTHER MEASURES, SUCH AS PRE-DISCHARGE SAMPLING | | AND DILUTION FACTORS ALSO ENSURE THAT NO LIMITS ARE EXCEEDED. | | | | THE LICENSEE HAS DETERMINED THAT THE COMPUTER DATABASE FOR CALCULATING THE | | RADIATION MONITOR SETPOINT WAS SOMEHOW CORRUPTED WITH AN INCORRECT MIXTURES | | OF NUCLIDES. THIS RESULTED IN INCORRECT SETPOINT CALCULATIONS FOR THE | | EIGHT WASTE DISCHARGES. THE COMPUTER DATA BASE HAS BEEN CORRECTED AND THE | | RADIATION MONITOR SETPOINTS FOR THESE DISCHARGES RECALCULATED. ALL THE | | DISCHARGES EXCEPT THE LAST WERE MADE WITH CONSERVATIVE DISCHARGE SETPOINTS. | | | | ACTUAL DATA OF THE AVERAGE MONITOR READING FROM THE LAST WASTE TANK | | DISCHARGE WAS REVIEWED AND DETERMINED TO HAVE BEEN LESS THAN THE CORRECT | | SETPOINT. NO 10CFR20 LIMITS WERE EXCEEDED. | | | | THE ERROR IN THE COMPUTER DATA BASE WAS SPOTTED BASED ON A PRINTOUT OF | | DISCHARGE NUCLIDES WHICH APPEARED ERRONEOUS TO THE REVIEWING TECHNICIAN. | | THE CAUSE OF THE COMPUTER ERROR IS STILL UNDER INVESTIGATION | | | | THE NRC RESIDENT INSPECTOR HAS BEEN INFORMED. | +------------------------------------------------------------------------------+