U.S. Nuclear Regulatory Commission Operations Center Event Reports For 05/15/96 - 05/16/96 ** EVENT NUMBERS ** 30469 30470 30471 30472 30473 +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 30469 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: DRESDEN REGION: 3 |NOTIFICATION DATE: 05/15/96 | |UNIT: [ ] [ ] [3] STATE: IL |NOTIFICATION TIME: 12:37 [ET]| |RX TYPE: [1] GE-1,[2] GE-3,[3] GE-3 |EVENT DATE: 05/15/96 | +------------------------------------------------+EVENT TIME: 10:43[CDT]| |NRC NOTIFIED BY: THOMAS MOHR |LAST UPDATE DATE: 05/15/96 | |HQ OPS OFFICER: LEIGH TROCINE +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: UNUSUAL EVENT +-----------------------------+ |10 CFR SECTION: |ROY CANIANO RDO | |AAEC 50.72(a)(1)(i) EMERGENCY DECLARED |ROBERT DENNIG, NRR EO | |ACCS 50.72(b)(1)(iv) ECCS INJECTION |BAGWELL FEMA | |ARPS 50.72(b)(2)(ii) RPS ACTUATION |FRANK CONGEL AEOD | |AESF 50.72(b)(2)(ii) ESF ACTUATION |HENRY BAILEY AEOD | | |JOE GILLILAND PAO | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | | | | | | | | | 3 | A/R Y 83 POWER OPERATION | 0 HOT SHUTDOWN | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | DECLARATION OF UNUSUAL EVENT DUE TO OVERALL DEGRADED PLANT CONDITIONS, | | AUTOMATIC REACTOR SCRAM ON LOW REACTOR VESSEL WATER LEVEL DUE TO A LOSS OF | | FEEDWATER FLOW WITH THE FEEDWATER PUMPS RUNNING, EMERGENCY CORE COOLING | | SYSTEM (ECCS) DISCHARGE TO REACTOR VESSEL, AND MAIN STEAM ISOLATION VALVE | | (MSIV) CLOSURE | | | | AT 1043 (CDT), THE REACTOR AUTOMATICALLY SCRAMMED FROM 83% POWER DUE TO LOW | | REACTOR VESSEL WATER LEVEL WHICH RESULTED FROM A LOSS OF FEEDWATER FLOW | | WITH THE FEEDWATER PUMPS RUNNING. ALL CONTROL RODS FULLY INSERTED ON THE | | REACTOR SCRAM, AND REACTOR VESSEL WATER LEVEL DECREASED TO -59 INCHES ON | | THE MEDIUM RANGE INDICATION CAUSING A GROUP '1' (MSIV) ISOLATION AND ECCS | | INITIATION. THE HIGH PRESSURE COOLANT INJECTION (HPCI) SYSTEM BEGAN | | INJECTING WATER INTO THE REACTOR VESSEL DUE TO THE ECCS INITIATION, AND | | MANUAL HPCI CONTROL WAS ESTABLISHED TO RESTORE REACTOR VESSEL WATER LEVEL | | TO NORMAL. NONE OF THE SAFETY RELIEF VALVES LIFTED AS A RESULT OF THIS | | TRANSIENT, AND ALL SYSTEMS FUNCTION AS REQUIRED WITH THE EXCEPTION OF THE | | '1A' MSIV. THIS VALVE APPEARED TO REOPEN FOLLOWING RESET OF THE GROUP '1' | | ISOLATION SIGNAL. OPERATORS GAVE THE VALVE A CLOSED SIGNAL, AND IT | | APPEARED TO RECLOSE. | | | | UNIT 3 IS STABLE IN CONDITION 3 (HOT SHUTDOWN). OPERATORS ARE CURRENTLY | | UTILIZING THE ISOLATION CONDENSER TO CONTROL REACTOR VESSEL PRESSURE. THE | | HPCI SYSTEM HAS BEEN SECURED, AND OPERATORS ARE CURRENTLY UTILIZING CONTROL | | ROD DRIVE PUMPS TO CONTROL REACTOR VESSEL WATER LEVEL. THE CONDENSATE AND | | FEEDWATER PUMPS HAVE ALSO BEEN SECURED. DRYWELL PRESSURE IS CURRENTLY LESS | | THAN 2 POUNDS, AND CONTAINMENT PRESSURE IS APPROXIMATELY 1.2 POUNDS WHICH | | IS CONSIDERED TO BE NORMAL. CONTAINMENT TEMPERATURE IS BETWEEN 90øF AND | | 100øF. THERE HAS BEEN NO INCREASE IS CONTAINMENT SUMP LEVEL, AND | | SUPPRESSION POOL PARAMETERS ARE NORMAL. THERE HAVE BEEN REPORTS OF | | INCREASED INPUT TO THE TURBINE BUILDING SUMPS, BUT THE SOURCE OF THE | | LEAKAGE HAS NOT BEEN VERIFIED. THE INPUT TO THE TURBINE BUILDING SUMPS HAS | | DECREASED AND HAS APPARENTLY STOPPED. THE LICENSEE PLANS TO PLACE UNIT 3 | | IN A COLD SHUTDOWN CONDITION AND A PLANT COOLDOWN IS IN PROGRESS. | | | | PRIOR TO THIS EVENT, 1 OF 2 ('A') MAIN FEEDWATER REGULATING (MFW REG) | | VALVES WAS CLOSED AND INOPERABLE DUE TO A PACKING LEAK. THE LICENSEE'S | | EVENT REVIEW TO DETERMINE THE CAUSE OF THE LOSS OF FEEDWATER IS CURRENTLY | | IN PROGRESS. THE LICENSEE HAS DETERMINED THAT THE FEEDWATER LINE IS | | INTACT, AND LICENSEE PERSONNEL ARE CONTINUING TO PERFORM WALKDOWNS OF THE | | CONDENSATE AND FEEDWATER SYSTEMS. THERE HAS BEEN NO INDICATION OF ANY | | BROKEN LINES AT THIS TIME. THE LICENSEE'S CURRENT NON-CONFIRMED PROBABLE | | DIAGNOSIS OF THE CAUSE OF THIS EVENT INVOLVES THE FAILURE OF THE 'B' MFW | | REG VALVE. CLOSURE OF THE 'B' MFW REG VALVE COULD HAVE CAUSED AN INCREASE | | IN FEEDWATER LINE PRESSURE WHICH IN TURN COULD HAVE CAUSED FEEDWATER SYSTEM | | RELIEF VALVES TO LIFT. THE RELIEF VALVES COULD HAVE DRAINED INTO TROUGHS | | WHICH COULD HAVE OVERFLOWED ONTO THE FLOOR, AND THE WATER COULD THEN HAVE | | DRAINED DOWN TO THE TURBINE BUILDING SUMPS. THE SUMP LEVEL INCREASE MAY | | HAVE STOPPED BECAUSE THE CONDENSATE AND FEEDWATER PUMPS HAVE BEEN SECURED. | | | | THERE WERE NO SIGNIFICANT MAINTENANCE ACTIVITIES OCCURRING AT THE TIME OF | | THIS EVENT. HOWEVER, THE LICENSEE WAS STARTING TO PERFORM NORMAL MONTHLY | | LOW PRESSURE ECCS SURVEILLANCES, AND A PLANT CLEANUP DAY WAS IN PROGRESS. | | THE LICENSEE DID NOT BELIEVE THAT THESE EVENTS WERE RELATED TO THIS PLANT | | TRANSIENT. | | | | AT 1122 (CDT), THE LICENSEE DECLARED AN UNUSUAL EVENT BASED UPON OVERALL | | DEGRADED PLANT CONDITIONS. THE LICENSEE BELIEVED THAT THIS ACTION WAS | | PRUDENT IN ORDER TO GET NEEDED SUPPORT DUE TO THE LOW REACTOR VESSEL WATER | | LEVEL CONDITION, DUE TO THE UNCERTAIN CONDITION OF THE FEEDWATER SYSTEM, | | AND DUE TO THE REPORTS OF WATER LEAKAGE IN THE PLANT THAT THE LICENSEE IS | | CURRENTLY ATTEMPTING TO VERIFY. UNUSUAL EVENT TERMINATION CRITERIA HAVE | | NOT BEEN ESTABLISHED AT THIS TIME. THE LICENSEE PLANS TO PROVIDE UPDATES | | TO THE NRC OPERATION CENTER WHEN THE SOURCE OF THE WATER LEAKAGE HAS BEEN | | IDENTIFIED AND WHEN THE EMERGENCY CLASSIFICATION OF UNUSUAL EVENT HAS | | CHANGED. | | | | THE LICENSEE NOTIFIED THE NRC RESIDENT INSPECTOR, THE STATE RESIDENT | | INSPECTOR, AND THE STATE OF ILLINOIS. | | | | * * * UPDATE AT 1630 ON MAY 15, 1996 FROM PALANYK RECEIVED BY TROCINE * * * | | | | UNIT 3 IS IN CONDITION 3 (HOT SHUTDOWN) WITH REACTOR PRESSURE AT 150 POUNDS | | AND DECREASING BECAUSE OF THE PLANT COOLDOWN. REACTOR WATER LEVEL IS IN | | ITS NORMAL BAND AND IS STILL BEING MAINTAINED BY USE OF THE CONTROL ROD | | DRIVE SYSTEM. IN ADDITION, THE ISOLATION CONDENSER IS STILL BEING UTILIZED | | FOR REACTOR VESSEL PRESSURE CONTROL AND PLANT COOLDOWN. THE LICENSEE | | CURRENTLY PLANS ON TRANSITIONING TO THE USE OF THE SHUTDOWN COOLING SYSTEM | | WITHIN THE NEXT FEW HOURS. UNIT 3 IS STABLE AND THE PLANT COOLDOWN IS IN | | PROGRESS. | | | | THE LICENSEE HAS WALKED DOWN THE FEEDWATER SYSTEM, HAS REVIEWED THE CONTROL | | ROOM PARAMETERS, AND HAS IDENTIFIED NO SIGNIFICANT DEGRADATION SUCH AS A | | RUPTURE OR BREAK IN THE FEEDWATER SYSTEM. THE CONDENSATE AND FEEDWATER | | PUMPS ARE STILL SECURED, AND THE SYSTEM HAS BEEN PRESSURIZED FOR RETURN TO | | SERVICE, IF NEEDED. ALL UNIT 3 ECCS EQUIPMENT IS AVAILABLE, IF NEEDED. | | | | THE LICENSEE IS STILL EVALUATING THE CAUSE OF THE CONDITION THAT CAUSED THE | | LOW LEVEL REACTOR SCRAM AND CURRENTLY BELIEVES THAT THE 'B' MFW REG VALVE | | MAY HAVE FAILED IN THE CLOSED POSITION. THIS HYPOTHESIS IS STILL UNDER | | INVESTIGATION, AND A FINAL CONCLUSION HAS NOT YET BEEN DETERMINED. | | APPARENTLY, THE MFW REG VALVE CONTROLLER WAS INDICATING THE NEED FOR WATER | | DURING THE TRANSIENT, AND THE FEEDWATER PUMPS WERE RUNNING. | | | | THE UNUSUAL EVENT IS STILL IN EFFECT, AND THE LICENSEE PLANS TO CONTINUE TO | | COOL UNIT 3 DOWN TO A COLD SHUTDOWN CONDITION. THE LICENSEE HAS ALSO TAKEN | | SAMPLES OF THE REACTOR WATER IN ORDER TO VERIFY FUEL INTEGRITY PRIOR TO | | REOPENING THE MSIVs. THE SAMPLE RESULTS ARE EXPECTED TO BE AVAILABLE AT | | APPROXIMATELY 1600 (CDT). AT THAT TIME, THE LICENSEE WILL REEVALUATE THE | | EMERGENCY CLASSIFICATION TERMINATION CRITERIA. THE LICENSEE WILL ALSO | | NOTIFY THE NRC OPERATIONS CENTER OF ANY CHANGES IN THE EMERGENCY | | CLASSIFICATION OF UNUSUAL EVENT. | | | | THE LICENSEE HAD NOT INFORMED THE NRC RESIDENT INSPECTOR OF THIS UPDATE AT | | THE TIME OF THIS NOTIFICATION. THE HOO NOTIFIED R3DO CANIANO, AEOD BAILEY, | | AND NRR EO DENNIG. | | | | * * * UPDATE AT 0016 ON MAY 16, 1996 BY VERCELLI RECEIVED BY JOLLIFFE * * * | | | | AT 2308 (CDT) ON MAY 15, 1996, THE LICENSEE TERMINATED THE UNUSUAL EVENT. | | UNIT 3 IS STABLE IN CONDITION 4 (COLD SHUTDOWN). WATER SAMPLES INDICATE | | NO FUEL LEAKAGE. THE LICENSEE NOTIFIED STATE AND LOCAL OFFICIALS AND WILL | | NOTIFY THE NRC RESIDENT INSPECTOR OF THE TERMINATION OF THE UNUSUAL EVENT. | | THE HOO NOTIFIED R3DO CANIANO, NRR EO DENNIG, AND FEMA SIBOCH OF THE | | TERMINATION OF THE UNUSUAL EVENT. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |HOSPITAL | |EVENT NUMBER: 30470 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |LICENSEE: ABINGTON MEMORIAL HOSPITAL |NOTIFICATION DATE: 05/15/96 | | CITY: ABINGTON REGION: 1 |NOTIFICATION TIME: 14:18 [ET]| | COUNTY: PHILADELPHIA STATE: PA |EVENT DATE: 05/13/96 | |LICENSE#: 37-0043202 AGREEMENT: N |EVENT TIME: 10:00[EDT]| | DOCKET: |LAST UPDATE DATE: 05/15/96 | | +-----------------------------+ | |PERSON ORGANIZATION| | |DELLA GRECA RDO | | |DON COOL, NMSS EO | +------------------------------------------------+HENRY BAILEY AEOD | |NRC NOTIFIED BY: RAMANIK PATEL (RSO) | | |HQ OPS OFFICER: JOHN MacKINNON | | +------------------------------------------------+ | |EMERGENCY CLASS: NOT APPLICABLE | | |10 CFR SECTION: | | |NINF INFORMATION ONLY | | | | | | | | | | | | | | +------------------------------------------------+-----------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | UNACCOUNTED FOR BRACHYTHERAPY SEED FOUND IN A RADIOACTIVE TRASH ROOM. | | | | THIS EVENT WAS REPORTED BY THE RADIATION SAFETY OFFICER FOR ABINGTON | | MEMORIAL HOSPITAL, ABINGTON, PA: | | | | PRIOR TO FIRE PROOFING A RADIOACTIVE TRASH ROOM, LOCATED IN THE BASEMENT OF | | THE HOSPITAL, THE RADIOACTIVE TRASH WAS MOVED TO AN ADJACENT RADIOACTIVE | | TRASH ROOM. THE ONLY OBJECTS THAT COULD NOT BE REMOVED, DUE TO THEIR | | WEIGHT, FROM THE ROOM WAS AN L-BLOCK (FACE SHIELD MADE OF LEAD), AND A DESK | | WITH A SAFE ON TOP OF IT. A RADIATION SURVEY OF THE ROOM WAS PERFORMED | | BEFORE LETTING THE WORKERS COMMENCE FIRE PROOFING THE ROOM. DURING THE | | SURVEY, RADIATION LEVELS OF BETWEEN 10 TO 15 MR/HR WERE FOUND INSTEAD OF | | EXPECTED READINGS OF LESS THAN 3 MR/HR. THE RSO WAS UNABLE TO CONFIRM THESE | | READINGS FOR THREE WEEKS BECAUSE HE HAD TAKEN THALLIUM-201 FOR A STRESS | | TEST. THE TRASH ROOM WAS SECURED UNTIL 05/13/96 WHEN THE RSO PERFORMED HIS | | RADIATION SURVEYS OF THE ROOM. DURING HIS SURVEYS NEXT TO THE L-BLOCK ON | | THE FLOOR HE FOUND A 16 MILLICURIE CESIUM-137 SEED USED IN BRACHYTHERAPY | | TREATMENT. THE SEED IS LESS THAN 1" LONG WITH A DIAMETER BETWEEN 3 TO 4 | | MILLIMETERS. THE SEED WAS PLACED IN A LEAD CONTAINER. SOME RADIUM | | CONTAMINATION WAS ALSO FOUND ON THE L-BLOCK PANELING AND BEHIND THE DESK. | | THE L-BLOCK PANELING AND THE AREA BEHIND THE DESK WERE DECONTAMINATED. | | THE RSO PERFORMED AN INVENTORY OF THEIR RADIATIVE MATERIALS AND FOUND | | NOTHING MISSING. THE RSO THINKS THAT THE CESIUM-137 SEED THAT WAS FOUND ON | | THE FLOOR INSIDE THE RADIOACTIVE TRASH ROOM HAD FALLEN OUT OF THE L-BLOCK | | ONTO THE FLOOR WHEN AN ATTEMPT WAS MADE TO MOVE THE L-BLOCK. THE REASON WHY | | THIS CESIUM-137 SEED IS NOT MISSING FROM THEIR RADIOACTIVE MATERIAL | | INVENTORY IS BECAUSE WHEN THE RSO STARTED WORKING AT THIS HOSPITAL 11 YEARS | | AGO HE PERFORMED AN INITIAL RADIOACTIVE MATERIAL INVENTORY AND THIS | | CESIUM-137 SEED WAS ALREADY MISSING (STUCK INSIDE THE L-BLOCK) AT THE TIME | | OF THE INVENTORY. NOBODY WAS OVEREXPOSED FROM THE CESIUM-137 SEED. THE RSO | | SAID THAT HE HAS TWO PEOPLE FROM THE NRC REGION 1 OFFICE AT THE HOSPITAL | | NOW AND THAT HE HAD ALREADY NOTIFIED REGION 1 SHANBAKY OF THIS EVENT. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 30471 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: RIVER BEND REGION: 4 |NOTIFICATION DATE: 05/15/96 | |UNIT: [1] [ ] [ ] STATE: LA |NOTIFICATION TIME: 16:45 [ET]| |RX TYPE: [1] GE-6 |EVENT DATE: 05/15/96 | +------------------------------------------------+EVENT TIME: 14:50[CDT]| |NRC NOTIFIED BY: CLARENCE E. BUSH JR. |LAST UPDATE DATE: 05/15/96 | |HQ OPS OFFICER: LEIGH TROCINE +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |PHIL HARRELL 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 +------------------------------------------------------------------------------+ | OFFSITE NOTIFICATION OF THE POTENTIAL FOR THE RELEASE OF AN ESTIMATED FIVE | | MILLION GALLONS OF CLARIFIED RIVER WATER DUE TO THE FAILURE OF AN ISOLATION | | VALVE TO RESEAT FOLLOWING AN ATTEMPT TO UNPLUG A CLARIFIER BLOWDOWN LINE | | | | THE LICENSEE USES MAKEUP WATER PUMPS TO PUMP RIVER WATER TO THE CLARIFIERS | | WHICH ARE VERY LARGE TANKS. THIS CLARIFIED WATER IS THEN USED FOR MAKE UP | | TO THE CIRCULATING WATER SYSTEM AND THE SERVICE WATER SYSTEM. DURING THE | | PERFORMANCE OF MAINTENANCE ON TANK 'A', AN EXPANSION JOINT IN THE BLOWDOWN | | LINE WAS REMOVED. THE LICENSEE THEN OPENED THE MANUAL ISOLATION VALVE | | (1WTL-V9) TO UNPLUG SLUDGE. THE VALVE THEN FAILED TO RECLOSE COMPLETELY. | | TREATED WATER WAS RELEASED TO THE SLUDGE POND THROUGH THE HOLE LEFT BY THE | | REMOVED EXPANSION JOINT. IF CORRECTIVE MEASURES ARE INEFFECTIVE THIS WATER | | MIGHT ESCAPE FROM THE POND. | | | | THE LICENSEE NOTIFIED THE STATE DEPARTMENT OF ENVIRONMENTAL QUALITY OF THIS | | EVENT AT 1450 CDT. THE LICENSEE ALSO NOTIFIED THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 30472 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: INDIAN POINT REGION: 1 |NOTIFICATION DATE: 05/15/96 | |UNIT: [ ] [3] [ ] STATE: NY |NOTIFICATION TIME: 18:38 [ET]| |RX TYPE: [2] W-4-LP,[3] W-4-LP |EVENT DATE: 05/15/96 | +------------------------------------------------+EVENT TIME: 16:45[EDT]| |NRC NOTIFIED BY: RUSS LONG |LAST UPDATE DATE: 05/15/96 | |HQ OPS OFFICER: LEIGH TROCINE +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |ANIELLO DELLA GRECA RDO | |APRE 50.72(b)(2)(vi) OFFSITE NOTIFICATION | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |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 +------------------------------------------------------------------------------+ | OFFSITE NOTIFICATION OF A SPILL OF APPROXIMATELY 2,000 GALLONS OF SEWAGE (A | | SMALL AMOUNT OF WHICH ENTERED THE HUDSON RIVER.) | | | | THE SPILL OF APPROXIMATELY 2,000 GALLONS OF SEWAGE OCCURRED DUE TO A BREAK | | IN A SEWER LINE OUTSIDE THE PROTECTED AREA. THE SPILL HAS BEEN STOPPED, | | AND THE SEWAGE HAS BEEN DIVERTED TO HOLDING TANKS. THE GRASS AND SOIL NEAR | | THE PIPE BREAK ABSORBED MOST OF THE LIQUID SEWAGE, BUT SOME WAS OBSERVED TO | | BE POOLING UP AND GOING TO A STORM DRAIN. THE LICENSEE PLACED A MOAT | | AROUND THE STORM DRAIN AND ABSORBED ALL OF THE LIQUID. THE LICENSEE HAS | | MADE EFFORTS TO CLEAN THE SEWAGE FROM THE GRASSY AREA WHERE THE PIPE BROKE, | | BUT THE LICENSEE HAS ASSUMED THAT A SMALL AMOUNT OF THE SEWAGE REACHED THE | | HUDSON RIVER. THE CAUSE OF THE BREAK IS STILL UNDER INVESTIGATION. | | | | AT 1645, THE LICENSEE NOTIFIED THE NEW YORK STATE DEPARTMENT OF | | ENVIRONMENTAL CONSERVATION (REPORT NUMBER 96-02204) OF THIS EVENT. THE | | LICENSEE ALSO NOTIFIED THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 30473 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: MILLSTONE REGION: 1 |NOTIFICATION DATE: 05/15/96 | |UNIT: [1] [ ] [ ] STATE: CT |NOTIFICATION TIME: 18:51 [ET]| |RX TYPE: [1] GE-3,[2] CE,[3] W-4-LP |EVENT DATE: 05/15/96 | +------------------------------------------------+EVENT TIME: 18:30[EDT]| |NRC NOTIFIED BY: DENNIS LATZ |LAST UPDATE DATE: 05/15/96 | |HQ OPS OFFICER: LEIGH TROCINE +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |ANIELLO DELLA GRECA 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 +------------------------------------------------------------------------------+ | PARTIAL BLOCKING OF ONE OF TWO REFUEL FLOOR RADIATION MONITORS BY CONCRETE | | SHIELD PLUGS | | | | ONE OF TWO RADIATION MONITORS ON THE REFUEL FLOOR WAS FOUND TO BE PARTIALLY | | BLOCKED BY CONCRETE SHIELD PLUGS, AND IT CANNOT PERFORM ITS INTENDED SAFETY | | FUNCTION. THE SHIELD PLUGS, TYPICALLY LOCATED ABOVE OF THE REACTOR VESSEL | | HEAD, WERE REMOVED AND PLACED IN THEIR CURRENT LOCATION PRIOR TO REMOVAL OF | | THE REACTOR VESSEL HEAD FOR REFUELING. WHEN THE SHIELD PLUGS ARE REMOVED | | FROM THEIR NORMAL POSITION ABOVE THE REACTOR VESSEL HEAD, THEY ARE PLACED | | IN THE SAME LAYDOWN AREA THAT HAS BEEN USED FOR EACH REFUELING OUTAGE. | | DURING THE CURRENT REFUELING OUTAGE, IT WAS FOUND THAT WHEN THE CONCRETE | | SHIELD PLUGS ARE LOCATED IN THE LAYDOWN AREA, THEY PARTIALLY BLOCK THE | | FIELD OF VIEW OF ONE OF TWO RADIATION MONITORS ON THE WALL OF THE REFUEL | | FLOOR. | | | | THE LICENSEE PLANS TO RAISE THE AFFECTED RADIATION MONITOR SO THAT THE | | FIELD OF VIEW IS NOT IMPEDED BY THE SHIELD PLUGS. THE LICENSEE ALSO HAS | | CONTROLS IN PLACE TO PREVENT THE VESSEL FROM BEING REFUELED. THE GATES ARE | | IN PLACE IN THE FUEL POOL, AND THEY ARE TAGGED IN THAT POSITION UNTIL THIS | | ISSUE IS RESOLVED. | | | | THE LICENSEE PLANS TO NOTIFY THE NRC RESIDENT INSPECTOR AND THE APPLICABLE | | STATE AND LOCAL AGENCIES. | +------------------------------------------------------------------------------+