U.S. Nuclear Regulatory Commission Operations Center Event Reports For 12/01/94 - 12/02/94 ** EVENT NUMBERS ** 28092 28094 28095 28096 28097 28098 +----------------------------------+ +-----------------------+ |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: 12/01/94 | |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. | | | | ****UPDATE @ 1325ET 12/01/94 BY DENNIS MAY TAKEN BY MACKINNON*** | | | | LICENSEE EXITED TECH SPEC 3.5.D.4 (24 HOUR LCO) AT 1200 ET AFTER | | MAINTENANCE & ENGINEERING PERFORMED AN ANALYSIS OF THE SERVICE WATER PIN | | HOLE LEAK PER GENERIC LETTER 90-05 ( GUIDANCE FOR PERFORMING TEMPORARY CODE | | REPAIRS OF ASME ....). LICENSEE IS STILL IN TECH SPEC 3.5.D.3 (SEVEN DAY | | LCO WHICH STARTED 11/27/94 @ 1630 HOURS) FOR ALTERNATE SHUTDOWN COOLING | | SYSTEM BECAUSE IT USES THE SERVICE WATER PIPE WHICH HAS THE SMALL PIN HOLE | | (IT IS NOT LEAKING AT THIS TIME). LICENSEE IS NOT SURE IF THEY WILL HAVE | | THE SERVICE WATER SYSTEM PIN HOLE PROBLEM RESOLVED BY 12/04/94 1630 HOURS. | | IF THIS PROBLEM IS NOT RESOLVED BY 1630 HOURS ON 12/04/94 THEY WILL HAVE TO | | SHUTDOWN THE PLANT. R1DO (LARRY DOERFLEIN) NOTIFIED. | | | | RESIDENT INSPECTOR WAS INFORMED BY THE LICENSEE. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28094 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: ROBINSON REGION: 2 |NOTIFICATION DATE: 12/01/94 | |UNIT: [2] [ ] [ ] STATE: SC |NOTIFICATION TIME: 10:52 [ET]| |RX TYPE: [2] W-3-LP |EVENT DATE: 12/01/94 | +------------------------------------------------+EVENT TIME: 09:54[EST]| |NRC NOTIFIED BY: CROOK |LAST UPDATE DATE: 12/01/94 | |HQ OPS OFFICER: DOUG WEAVER +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |JOHN POTTER 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 Y 100 POWER OPERATION | 100 POWER OPERATION | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | OFFSITE NOTIFICATION OF A SEWER LINE BREAK | | | | THE LICENSEE WILL NOTIFY THE APPROPRIATE STATE AND LOCAL GOVERNMENTS THAT A | | SEWER LINE BREAK OCCURRED IN THE SITE PARKING LOT. ABOUT 250 GALLONS OF | | SEWAGE HAD SPILLED ONTO THE GROUND. THE SPILL WAS ISOLATED PRIOR TO | | REACHING THE STORM DRAINS. THE SPILL AREA HAS BEEN DISINFECTED AND REPAIRS | | TO THE SEWAGE LINE ARE IN PROGRESS. | | | | THE LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28095 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: RIVER BEND REGION: 4 |NOTIFICATION DATE: 12/01/94 | |UNIT: [1] [ ] [ ] STATE: LA |NOTIFICATION TIME: 14:06 [ET]| |RX TYPE: [1] GE-6 |EVENT DATE: 12/01/94 | +------------------------------------------------+EVENT TIME: 10:25[CST]| |NRC NOTIFIED BY: M CLARK |LAST UPDATE DATE: 12/01/94 | |HQ OPS OFFICER: JOHN MacKINNON +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |ELMO COLLINS 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 +------------------------------------------------------------------------------+ | NOTIFIED LOUISIANA DEPARTMENT OF ENVIRONMENTAL PROTECTION AGENCY AND | | DEPARTMENT OF ENVIRONMENTAL QUALITY THAT THEIR SEWAGE EFFLUENT PH WAS 5.62 | | (NON REPORTABLE PH LOWER LIMIT IS 6.0). | | | | DURING WEEKLY SAMPLING OF THEIR SEWAGE PLANT EFFLUENT THE PH OF THE | | EFFLUENT WAS FOUND TO BE 5.62 (LOWER LIMIT IS 6.0 & THE UPPER LIMIT IS | | 9.0). LICENSEE IS ADDING CHEMICALS AND WATER TO THE SEWAGE PLANT TO CORRECT | | THE PH IN BALANCE. | | | | RESIDENT INSPECTOR WAS INFORMED BY THE LICENSEE. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28096 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: SUSQUEHANNA REGION: 1 |NOTIFICATION DATE: 12/01/94 | |UNIT: [1] [ ] [ ] STATE: PA |NOTIFICATION TIME: 14:13 [ET]| |RX TYPE: [1] GE-4,[2] GE-4 |EVENT DATE: 11/30/94 | +------------------------------------------------+EVENT TIME: 20:31[EST]| |NRC NOTIFIED BY: FERNSLER |LAST UPDATE DATE: 12/01/94 | |HQ OPS OFFICER: JOHN MacKINNON +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |LARRY DOERFLEIN 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 | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | FEEDWATER TRANSIENT CAUSED CORE THERMAL POWER LIMIT TO EXCEED 102% FOR | | APPROXIMATELY 21 SECONDS. | | | | LICENSEE EXCEEDED THEIR TECH SPEC CORE POWER THERMAL LIMIT OF 3293 MWth DUE | | TO A POWER EXCURSION CAUSED BY A FEEDWATER LEVEL TRANSIENT. | | CORE THERMAL POWER WAS ABOVE 102% FOR APPROXIMATELY 21 SECONDS. CORE | | THERMAL POWER PEAKED AT 104% OF RATED CORE POWER THERMAL LIMIT. POWER | | RETURNED TO APPROXIMATELY 100.3% WITHIN 2.5 MINUTES. POWER WAS REDUCED TO | | LESS THAN 100% WITHIN 30 MINUTES. EIGHT HOUR SHIFT AVERAGE (1500 TO 2300 | | HOURS) FOR CORE POWER THERMAL LIMIT DID NOT EXCEED 100% OF THEIR CORE | | THERMAL POWER LIMIT. THIS EVENT IS BEING REPORTED PER SSINS # 0200 LETTER | | (DISCUSSION OF LICENSEE POWER LEVEL, DATED 08/22/80) - 24 HOUR LICENSE | | REPORT. | | FAILURE OF A DIODE IN THE FEEDWATER LEVEL CONTROL CIRCUIT CAUSED TWO FUSES | | IN THE SAME CIRCUIT TO FAIL. THIS CAUSED A LOSS OF ONE OF THREE FEEDWATER | | FLOW INPUT SIGNALS TO THE FEEDWATER LEVEL CONTROL SYSTEM WHICH IN TURN | | RAISED REACTOR VESSEL WATER LEVEL TO +49" (NORMAL LEVEL IS +35"). | | | | RESIDENT INSPECTOR WAS INFORMED BY THE LICENSEE. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28097 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: SALEM REGION: 1 |NOTIFICATION DATE: 12/01/94 | |UNIT: [1] [2] [ ] STATE: NJ |NOTIFICATION TIME: 18:39 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 12/01/94 | +------------------------------------------------+EVENT TIME: 18:15[EST]| |NRC NOTIFIED BY: SAUER |LAST UPDATE DATE: 12/01/94 | |HQ OPS OFFICER: JOHN MacKINNON +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |LARRY DOERFLEIN 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 90 POWER OPERATION | 90 POWER OPERATION | | 2 | N N 0 REFUELING | 0 REFUELING | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | TECHNICAL SUPPORT CENTER (TSC) DECLARED UNINHABITABLE. | | | | TECHNICAL SUPPORT CENTER HAS BEEN DETERMINED TO BE UNINHABITABLE DUE TO THE | | LOSS OF ITS AIR CONDITIONING. IN CASE OF AN EMERGENCY THE EMERGENCY OFFSITE | | FACILITY WOULD BE USED INSTEAD OF THE TSC. LICENSEE DID NOT KNOW WHAT | | CAUSED THE LOSS OF AIR CONDITIONING TO THE TSC. LICENSEE HAS PERSONNEL | | TROUBLE SHOOTING THE AIR CONDITIONING PROBLEM. | | | | RESIDENT INSPECTOR WILL BE INFORMED BY THE LICENSEE. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28098 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: PRAIRIE ISLAND REGION: 3 |NOTIFICATION DATE: 12/02/94 | |UNIT: [1] [ ] [ ] STATE: MN |NOTIFICATION TIME: 01:47 [ET]| |RX TYPE: [1] W-2-LP,[2] W-2-LP |EVENT DATE: 12/02/94 | +------------------------------------------------+EVENT TIME: 00:21[CST]| |NRC NOTIFIED BY: LES ANDERSON |LAST UPDATE DATE: 12/02/94 | |HQ OPS OFFICER: DOUG WEAVER +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |MONTE PHILLIPS 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 100 POWER OPERATION | 100 POWER OPERATION | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | LETDOWN ISOLATED ON LOSS OF THE OPERATING CHARGING PUMP | | | | A CONTAINMENT ISOLATION VALVE SHUT, STOPPING LETDOWN FLOW, DUE TO THE LOSS | | OF THE OPERATING CHARGING PUMP. ANOTHER CHARGING PUMP WAS STARTED AND | | LETDOWN FLOW WAS RESTORED. THE CAUSE OF THE CHARGING PUMP TRIP IS UNDER | | INVESTIGATION. | | | | THE PLANT HAS THREE POSITIVE DISPLACEMENT PUMPS, ONLY TWO OF WHICH ARE | | REQUIRED TO BE OPERABLE BY TECHNICAL SPECIFICATIONS. | | | | THE LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+