U.S. Nuclear Regulatory Commission Operations Center Event Reports For 04/04/95 - 04/05/95 ** EVENT NUMBERS ** 28427 28532 28578 28632 28633 28634 28635 28636 28637 +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28427 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: SEQUOYAH REGION: 2 |NOTIFICATION DATE: 02/23/95 | |UNIT: [1] [ ] [ ] STATE: TN |NOTIFICATION TIME: 17:28 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 02/23/95 | +------------------------------------------------+EVENT TIME: 17:15[EST]| |NRC NOTIFIED BY: REEVES |LAST UPDATE DATE: 04/04/95 | |HQ OPS OFFICER: DICK JOLLIFFE +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: UNUSUAL EVENT +-----------------------------+ |10 CFR SECTION: |CHRIS CHRISTENSEN 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 |EARL FEMA | |ARPS 50.72(b)(2)(ii) RPS ACTUATION |HENRY BAILEY AEOD | |NLCO TECH SPEC LCO A/S |JOSEPH GIITTER AEOD | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | M/R Y 5 POWER OPERATION | 0 HOT STANDBY | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | - UE & PLANT SHUTDOWN DUE TO UNIDENTIFIED LEAK > TS LIMIT; Rx TRIP @ 5% - | | | | WITH UNIT 1 AT 100% POWER, LICENSEE ESTIMATED A LEAK INTO CONTAINMENT TO BE | | 3 TO 5 GPM. PRESSURIZER LEVEL DROPPED FROM 60 TO 57%; VOLUME CONTROL TANK | | LEVEL DROPPED FROM 63%; REACTOR BUILDING SUMP LEVELS INCREASED; RADIATION | | MONITOR IN THE INCORE INSTRUMENT ROOM INDICATED HIGH. A RADIATION CONTROL | | TECHNICIAN OBSERVED STEAM AND WATER IN THE INCORE INSTRUMENT ROOM BY | | LOOKING THROUGH THE AIR LOCK DOOR OBSERVATION GLASS. | | | | LICENSEE CLASSIFIED THE LEAK AS UNIDENTIFIED LEAKAGE: TECH SPEC | | UNIDENTIFIED LEAK RATE LIMIT IS 1 GPM. | | | | TECH SPEC LCO A/S 3.4.6.2 REQUIRES LICENSEE TO RESTORE THE LEAK RATE TO | | WITHIN THE TECH SPEC LIMIT WITHIN 4 HOURS OR TO PLACE UNIT 1 IN AT LEAST | | HOT STANDBY MODE WITHIN THE NEXT 6 HOURS. | | | | LICENSEE BEGAN SHUTTING UNIT 1 DOWN FROM 100% POWER AT THE RATE OF 2% PER | | MINUTE AND EXPECTS TO BE SHUTDOWN BY 1830. | | | | AT 1715, LICENSEE DECLARED AN UNUSUAL EVENT DUE TO A TECH SPEC REQUIRED | | PLANT SHUTDOWN. LICENSEE WILL NOTIFY STATE AND LOCAL OFFICIALS AND HAS | | NOTIFIED THE NRC RESIDENT INSPECTOR. | | | | 1 OF 4 EDGs (#2B) SHARED BETWEEN BOTH UNITS IS INOPERABLE. | | | | THIS EVENT HAS NO EFFECT ON UNIT 2 WHICH IS AT 100% POWER. | | | | | | * * * UPDATE AT 1837 BY WEBB ENTERED BY HOO JOLLIFFE * * * | | | | AT 1826 WITH POWER AT 5%, UNIT 1 RECEIVED A CONTROL ROD URGENT FAILURE | | ALARM INDICATING A PROBABLE PROBLEM IN THE ROD CONTROL CABINETS. CONTROL | | ROOM OPERATORS MANUALLY TRIPPED THE REACTOR. ALL CONTROL RODS INSERTED | | COMPLETELY AND STEAM IS BEING DUMPED TO THE MAIN CONDENSER. UNIT 1 IS | | STABLE IN MODE 3 (HOT STANDBY). | | | | LICENSEE NOTIFIED THE NRC RESIDENT INSPECTOR. | | | | HOO NOTIFIED R2DO CHRISTENSEN AND NRR EO TRAVERS. | | | | * * * UPDATE AT 1254 ON 02/24/95 BY GRABLE ENTERED BY HOO JOLLIFFE * * * | | | | AT 0415 ON 02/24/95, LICENSEE ISOLATED THE LEAK. THE LEAK IS COMING FROM | | THE INCORE REACTOR VESSEL LEVEL INDICATION SYSTEM LOWER TAP COMPRESSION | | FITTING. | | | | AT 1240, WITH THE RCS UNIDENTIFIED LEAK RATE AT 0.9 GPM, LICENSEE EXITED | | TECH SPEC LCO A/S 3.4.6.2 AND TERMINATED THE UNUSUAL EVENT. UNIT 1 IS | | STABLE IN MODE 4 (HOT SHUTDOWN). | | | | LICENSEE WILL NOTIFY STATE AND LOCAL OFFICIALS AND THE NRC RESIDENT | | INSPECTOR OF THE TERMINATION OF THE UNUSUAL EVENT. LICENSEE HAS ISSUED A | | PRESS RELEASE. | | | | LICENSEE WILL REPAIR THE LEAK PRIOR TO PLANT RESTART. | | | | HOO NOTIFIED R2DO CHRISTENSEN, NRR EO DENNIG, FEMA DAMICO. | | | | ***UPDATE 4/4/95 @ 12:47 FROM FIELDS TAKEN BY SEBROSKY *** | | THE LICENSEE IS UPDATING THIS REPORT TO CLARIFY SOME INFORMATION. UPON | | REVIEWING STRIP CHARTS THE LICENSEE HAS DETERMINED THAT THE REACTOR WAS AT | | 2% WHEN THEY RECEIVED A CONTROL ROD URGENT FAILURE ALARM. PRIOR TO THE | | FAILURE THE LICENSEE WAS SHUTTING DOWN THE UNIT BY INSERTING CONTROL RODS | | AND BY ADDING BORON TO THE REACTOR COOLANT SYSTEM. BY THE TIME THE | | OPERATORS MANUALLY TRIPPED THE REACTOR, THE REACTOR WAS ALREADY SUBCRITICAL | | DUE TO THE BORON ADDITION. | | | | THE LICENSEE WILL INFORM THE RESIDENT INSPECTOR. HOO NOTIFIED R2DO(HOSEY). | +------------------------------------------------------------------------------+ !!!!!!!!! THIS EVENT HAS BEEN RETRACTED. THIS EVENT HAS BEEN RETRACTED !!!!!!! +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28532 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: LASALLE REGION: 3 |NOTIFICATION DATE: 03/15/95 | |UNIT: [ ] [2] [ ] STATE: IL |NOTIFICATION TIME: 08:55 [ET]| |RX TYPE: [1] GE-5,[2] GE-5 |EVENT DATE: 03/15/95 | +------------------------------------------------+EVENT TIME: 04:00[CST]| |NRC NOTIFIED BY: SPIELER |LAST UPDATE DATE: 04/04/95 | |HQ OPS OFFICER: GREG SCARFO +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |BRUCE JORGENSEN 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 +------------------------------------------------------------------------------+ | TWO CONTAINMENT ISOLATION VALVES WERE FOUND OPEN FOR UNKNOWN REASONS. | | | | THE FOLLOWING IS THE TEXT OF A FACSIMILE SUBMITTED BY THE LICENSEE: | | "AT 0400, THE DIVISION 1 (OUTBOARD) POST LOCA PRIMARY CONTAINMENT ISOLATION | | VALVES WERE FOUND IN THE "OPEN" POSITION, WHICH IS THE ESF ACTUATION | | POSITION FOR THESE VALVES. THE VALVES WERE PREVIOUSLY POSITIONED TO THE | | "CLOSED" POSITION. THE CAUSE FOR THE VALVE REPOSITIONING IS NOT KNOWN AT | | THIS TIME. AN EQUIPMENT OUT OF SERVICE WAS BEING RESTORED PRIOR TO THIS | | EVENT. | | | | THE RESIDENT INSPECTOR WILL BE INFORMED OF THE CAUSE WHEN IT IS | | DETERMINED." END OF TEXT. | | | | AT 0300, AN AUXILIARY POWER BUS WAS RETURNED TO SERVICE AND THE OUTBOARD | | CONTAINMENT ISOLATION VALVES ("2CM022A" AND "2CM025A") WERE CLOSED. AT THE | | TIME OF DISCOVERY, THE LICENSEE WAS COMPLETING MAINTENANCE ON ISOLATION | | RELAYS WHICH FEED THE ISOLATION LOGIC THAT ACTUATES THE AFFECTED VALVES. | | HOWEVER, PREVENTATIVE MEASURES HAD BEEN TAKEN TO ASSURE THAT THE OUTBOARD | | CONTAINMENT ISOLATION VALVES WOULD NOT OPEN. THE EFFICACY OF THESE | | MEASURES ARE BEING INVESTIGATED AT THIS TIME. THE LICENSEE WILL INFORM THE | | NRC RESIDENT INSPECTOR. | | | | * * * UPDATE AT 2007 ON 4/4/95 BY MUNDT TAKEN BY WEAVER * * * | | THE LICENSEE HAS RETRACTED THIS EVENT BASED ON THE FOLLOWING. THE ESF | | ACTUATION WAS INVALID BECAUSE THE ACTUAL PLANT CONDITION AND PARAMETERS DID | | NOT SATISFY THE REQUIREMENTS FOR A GROUP 2 ISOLATION. THE POST LOCA H2/02 | | PANELS WERE PROPERLY REMOVED FROM SERVICE. THE PANELS ARE NOT NEEDED IN | | OPERATING CONDITION 4 & 5 AND WHEN DEFUELED. THE PANELS WERE INCAPABLE OF | | PERFORMING THEIR INTENDED FUNCTION. THE LICENSEE WILL INFORM THE NRC | | RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ !!!!!!!!! THIS EVENT HAS BEEN RETRACTED. THIS EVENT HAS BEEN RETRACTED !!!!!!! +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28578 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: DUANE ARNOLD REGION: 3 |NOTIFICATION DATE: 03/23/95 | |UNIT: [1] [ ] [ ] STATE: IA |NOTIFICATION TIME: 20:37 [ET]| |RX TYPE: [1] GE-4 |EVENT DATE: 03/23/95 | +------------------------------------------------+EVENT TIME: 18:30[CST]| |NRC NOTIFIED BY: NICK BROWN |LAST UPDATE DATE: 04/04/95 | |HQ OPS OFFICER: DOUG WEAVER +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |WAYNE KROPP 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 +------------------------------------------------------------------------------+ | A 6" CRACK FOUND IN A CORE SPRAY LINE BRACKET MOUNTING PAD | | | | A VISUAL INSPECTION OF REACTOR INTERNALS REVEALED A 6" CRACK IN A BRACKET | | MOUNTING PAD. THE BRACKET ON THIS PAD SUPPORTS A PIPE LEADING TO ONE OF | | THE CORE SPRAY SPARGERS. THE PAD IS A THICKENED AREA ON THE INSIDE OF THE | | VESSEL. NO OTHER DETAILS OF THE CRACK WERE AVAILABLE AND NO OTHER CRACKS | | WERE REPORTED. | | | | THE LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. | | | | ***UPDATE ON 4/4/95 @ 11:29 FROM SCHUSSLER TO GOULD*** THE LICENSEE SENT | | DIVERS TO INSPECT THE ABOVE REPORTED CRACK AND DETERMINED THAT THE "CRACK" | | WAS ONLY A SURFACE IMPERFECTION AND WAS EASILY REMOVED BY GRINDING IT OUT. | | IT DID NOT AFFECT THE INTEGRITY OF THE BRACKET. THEREFORE, THE LICENSEE IS | | RETRACTING THIS EVENT. THE RI WILL BE INFORMED. THE REG DO(GARDNER) HAS | | BEEN NOTIFIED. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28632 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: RIVER BEND REGION: 4 |NOTIFICATION DATE: 04/04/95 | |UNIT: [1] [ ] [ ] STATE: LA |NOTIFICATION TIME: 12:26 [ET]| |RX TYPE: [1] GE-6 |EVENT DATE: 04/02/95 | +------------------------------------------------+EVENT TIME: 05:18[CST]| |NRC NOTIFIED BY: VERNON CARLSON |LAST UPDATE DATE: 04/04/95 | |HQ OPS OFFICER: DOUG WEAVER +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |JOHN PELLET 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 +------------------------------------------------------------------------------+ | STANDBY GAS TREATMENT SYSTEM (SBGT) STARTED ON A HIGH RADIATION SIGNAL | | | | THE LICENSEE DETERMINED ON 1000 ON 4/4/95 THAT THE SBGT SYSTEM STARTED ON | | AN INVALID HIGH RAD SIGNAL FROM THE ANNULUS RADIATION MONITOR RMS*RE11B. | | THE EVENT OCCURRED AT 0518 ON 4/2/95. | | | | THE DELAY IN REPORTING OCCURRED BECAUSE THE PLANT ORIGINALLY THOUGHT THE | | CAUSE OF THE SBGT ACTUATION WAS A LOW FLOW SIGNAL IN THE ANNULUS PRESSURE | | CONTROL SYSTEM. THE LICENSEE TERMED THE LOW FLOW SIGNAL AS A 'NON-ESF | | SIGNAL' AND CONCLUDED THAT THE EVENT WAS NOT REPORTABLE. | | | | UPON REVIEWING THIS EVENT ON 4/4/95, WITH THE KNOWLEDGE THAT THE CAUSE OF | | THE START WAS THE FAILURE OF A RAD MONITOR, THE LICENSEE CONCLUDED THAT THE | | EVENT WAS REPORTABLE. THE RADIATION MONITOR SIGNAL WAS TERMED AN 'ESF | | SIGNAL'. THE CHANGE IS BASED ON THE DIFFERENCE IN CLASSIFICATION BETWEEN | | THE SIGNALS THOUGHT TO HAVE CAUSED THE ACTUATION. | | | | THE RADIATION MONITOR IN QUESTION IS CURRENTLY BEING REPAIRED. | | | | BOTH RESIDENT INSPECTORS ARE ON TRAVEL. THE LICENSEE WILL INFORM OTHER | | REGIONAL INSPECTORS CURRENTLY ON SITE. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28633 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: SOUTH TEXAS REGION: 4 |NOTIFICATION DATE: 04/04/95 | |UNIT: [1] [ ] [ ] STATE: TX |NOTIFICATION TIME: 13:14 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 04/04/95 | +------------------------------------------------+EVENT TIME: 11:33[CST]| |NRC NOTIFIED BY: ROYCE BROWN |LAST UPDATE DATE: 04/04/95 | |HQ OPS OFFICER: DOUG WEAVER +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |JOHN PELLET RDO | |DDDD 73.71 UNSPECIFIED PARAGRAPH | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |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 +------------------------------------------------------------------------------+ | SAFEGUARDS SYSTEM DEGRADATION RELATED TO DETECTION & MONITORING | | | | COMPENSATORY MEASURES HAVE BEEN TAKEN, THE LICENSEE WILL INFORM THE NRC | | RESIDENT INSPECTOR. COMPLETE DETAILS OF THIS EVENT ARE CONTAINED IN THE | | HOO LOG. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |GENERAL INFORMATION or OTHER | |EVENT NUMBER: 28634 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |LICENSEE: DRESSER INDUSTRIAL VALVES |NOTIFICATION DATE: 04/04/95 | | CITY: ALEXANDRIA REGION: 4 |NOTIFICATION TIME: 14:00 [ET]| | COUNTY: STATE: LA |EVENT DATE: 04/04/95 | |LICENSE#: AGREEMENT: Y |EVENT TIME: 12:00[CST]| | DOCKET: |LAST UPDATE DATE: 04/04/95 | | +-----------------------------+ | |PERSON ORGANIZATION| | | | | | | +------------------------------------------------+ | |NRC NOTIFIED BY: R.D. DANZY |VERN HODGE NRR | |HQ OPS OFFICER: DOUG WEAVER | | +------------------------------------------------+ | |EMERGENCY CLASS: NOT APPLICABLE | | |10 CFR SECTION: | | |CCCC 21.21 UNSPECIFIED PARAGRAPH | | | | | | | | | | | | | | +------------------------------------------------+-----------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | PART 21 REPORT ON THE POTENTIAL FAILURE OF A MAIN STEAM SAFETY VALVE | | | | A DRESSER MAIN STEAM SAFETY VALVE FROM ENTERGY OPERATIONS, INC., ARKANSAS | | NUCLEAR ONE (ANO) UNIT 1, WAS REFURBISHED AT WYLE LABORATORIES, HUNTSVILLE, | | ALABAMA, IN FEBRUARY 1995. THIS WAS A TYPE 3707R SAFETY VALVE WITH SERIAL | | NUMBER BM-02978. DURING THE REFURBISHMENT, A DRESSER SERVICE ENGINEER | | FOUND SEVERAL NONCONFORMANCES. THE NONCONFORMANCES DISCOVERED DURING THE | | REFURBISHMENT INCLUDED THE USE OF FOREIGN REPLACEMENT PARTS, THE USE OF | | IMPROPER TOOLS AND WORN PARTS. THESE NONCONFORMANCES MAY HAVE CAUSED THE | | VALVE TO NOT FUNCTION AS DESIGNED. | | | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28635 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: ZION REGION: 3 |NOTIFICATION DATE: 04/04/95 | |UNIT: [1] [2] [ ] STATE: IL |NOTIFICATION TIME: 14:53 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 04/04/95 | +------------------------------------------------+EVENT TIME: 11:55[CST]| |NRC NOTIFIED BY: TORREZ |LAST UPDATE DATE: 04/04/95 | |HQ OPS OFFICER: DOUG WEAVER +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |RONALD GARDNER RDO | |HFIT 26.73 FITNESS FOR DUTY | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | N N 0 | 0 | | 2 | N N 0 | 0 | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | A LICENSED SUPERVISOR TESTED POSITIVE FOR ALCOHOL. THE TEST WAS FOR CAUSE. | | ACCESS TO THE PROTECTED AREA HAS BEEN REVOKED. SEE HOO LOG FOR ADDITIONAL | | DETAILS. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28636 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: MAINE YANKEE REGION: 1 |NOTIFICATION DATE: 04/04/95 | |UNIT: [1] [ ] [ ] STATE: ME |NOTIFICATION TIME: 16:42 [ET]| |RX TYPE: [1] CE |EVENT DATE: 04/04/95 | +------------------------------------------------+EVENT TIME: 15:35[EST]| |NRC NOTIFIED BY: LARRY GRIMARD |LAST UPDATE DATE: 04/04/95 | |HQ OPS OFFICER: DOUG WEAVER +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |GLENN MEYER 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 N 0 REFUELING | 0 REFUELING | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | OFFSITE NOTIFICATION OF A SMALL OIL SPILL | | | | THE NATIONAL RESPONSE CENTER WAS NOTIFIED OF THE PRESENCE OF A LIGHT OIL | | SHEEN ON THE SURFACE OF THE WATER AT THE PLANT'S COOLING WATER INTAKE | | STRUCTURE. THE SOURCE OF THE OIL SHEEN WAS DETERMINED TO BE RESIDUAL OIL | | FROM THE GROUND UNDER A CRANE LOCATED ON SITE TO SUPPORT MAINTENANCE | | ACTIVITIES. A STEADY RAINFALL DURING THE DAY HAD CAUSED THE OIL TO BECOME | | MOBILE AND MIGRATE TO THE WATER'S EDGE, THEN ONTO THE WATER SURFACE. | | | | THE RESIDUAL OIL ON THE GROUND IN THE AREA UNDER THE CRANE WAS CONTAINED | | WITH ABSORBENT MATERIAL WHICH TERMINATED THE OIL MIGRATION TO THE WATER. | | | | THE EFFECTIVENESS OF THE OIL CONTAINMENT WILL BE MONITORED THROUGH THE | | NIGHT, AND THE OIL SHEEN, WHICH WAS CONTAINED WITH THE OIL CONTAINMENT | | BOOM, IS BEING REMOVED. | | | | THE LICENSEE WILL INFORM THE NRC RESIDENT INSPECTOR. | | | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28637 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: SOUTH TEXAS REGION: 4 |NOTIFICATION DATE: 04/04/95 | |UNIT: [ ] [2] [ ] STATE: TX |NOTIFICATION TIME: 23:16 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 04/04/95 | +------------------------------------------------+EVENT TIME: 13:46[CST]| |NRC NOTIFIED BY: SMITH |LAST UPDATE DATE: 04/04/95 | |HQ OPS OFFICER: DOUG WEAVER +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |JOHN PELLET RDO | |NLTR LICENSEE 24 HR REPORT | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |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 +------------------------------------------------------------------------------+ | DIGITAL ROD POSITION INDICATION (DRPI) INOPERABLE FOR 22 MINUTES | | | | AT 1350 ON 4/4/95, UNIT 2 ENTERED T.S. 3.0.3 DUE TO A LOSS OF CONTROL ROD | | POSITION INDICATION. THE LOSS OF INDICATION WAS ATTRIBUTED TO A LOSS OF | | POWER TO THE DIGITAL ROD POSITION INDICATION SYSTEM. POWER WAS RESTORED TO | | THE SYSTEM AT 1403 AND WAS VERIFIED OPERABLE AT 1412. UNIT 2 EXITED T.S. | | 3.0.3 AT 1412. | | | | THE LOSS OF POWER WAS CAUSED BY THE FAILURE OF AN UNINTERRUPTIBLE POWER | | SUPPLY STATIC SWITCH TO SHIFT AUTOMATICALLY IN RESPONSE TO AN ELECTRICAL | | PERTURBATION DURING A SEVERE THUNDERSTORM. THE STATIC SWITCH WAS MANUALLY | | TRANSFERRED RESTORING POWER TO DRPI. A WORK ORDER HAS BEEN ISSUED TO | | DETERMINE THE CAUSE OF THE POWER SUPPLY FAILURE. | | | | THE LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+