U.S. Nuclear Regulatory Commission Operations Center Event Reports For 04/23/96 - 04/24/96 ** EVENT NUMBERS ** 30329 30337 30340 30341 30342 30343 30344 30345 30346 30347 30348 30349 30350 !!!!!!!!! THIS EVENT HAS BEEN RETRACTED. THIS EVENT HAS BEEN RETRACTED !!!!!!! +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 30329 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: SEQUOYAH REGION: 2 |NOTIFICATION DATE: 04/20/96 | |UNIT: [ ] [2] [ ] STATE: TN |NOTIFICATION TIME: 05:10 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 04/20/96 | +------------------------------------------------+EVENT TIME: 01:12[EDT]| |NRC NOTIFIED BY: ROBERT HAYS |LAST UPDATE DATE: 04/23/96 | |HQ OPS OFFICER: LEIGH TROCINE +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |CHARLES CASTO RDO | |AINA 50.72(b)(2)(iii)(A) POT UNABLE TO SAFE SD | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | | | | | 2 | N N 0 HOT STANDBY | 0 HOT STANDBY | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | DISCOVERY OF THE INABILITY OF AN INPUT TO THE REACTOR PROTECTION SYSTEM | | (RPS) TO TRIP THE REACTOR IF A TURBINE TRIP OCCURRED. | | | | DURING REMOVAL OF THE UNIT FROM SERVICE FOR A SCHEDULED REFUELING OUTAGE, | | THE REACTOR WAS MANUALLY TRIPPED FROM APPROXIMATELY 20% POWER PER PLANT | | OPERATING PROCEDURES, AND THE EMERGENCY PROCEDURE NETWORK WAS ENTERED. | | DURING THE PERFORMANCE OF THE IMMEDIATE OPERATOR ACTIONS, ONE BISTABLE | | LIGHT INDICATION FOR A TURBINE THROTTLE VALVE DID NOT SHOW FULLY CLOSED. | | THIS VALVE WAS VERIFIED TO BE CLOSED BY WAY OF THE LVDT METER (WHICH SHOWED | | '0'), BY THE FACT THAT THERE WAS NO REACTOR COOLANT SYSTEM COOLDOWN IN | | PROGRESS, AND BY LOCAL VERIFICATION. AT APPROXIMATELY 0500, THE LICENSEE'S | | INVESTIGATION FOUND THAT A THROTTLE VALVE LINKAGE THAT OPERATES THE LIMIT | | SWITCHES, WHICH ARE A BACKUP/REDUNDANT INPUT TO THE RPS, HAD BROKEN. | | ESSENTIALLY, THIS INPUT TO THE RPS WOULD HAVE BEEN UNABLE TO TRIP THE | | REACTOR IF A TURBINE TRIP HAD OCCURRED THROUGH THIS INPUT FROM LIMIT | | SWITCHES OFF OF FOUR THROTTLE VALVES. THIS IS A REDUNDANT CHANNEL, AND | | THIS IS NOT TO SAY THAT A REACTOR TRIP WOULD NOT HAVE OCCURRED FROM A | | TURBINE TRIP (ONLY THIS INPUT). | | | | THE UNIT IS CURRENTLY STABLE IN MODE 3. AUXILIARY FEEDWATER IS BEING | | SUPPLIED TO THE STEAM GENERATORS, AND SECONDARY STEAM IS BEING DUMPED TO | | THE CONDENSER. IN ADDITION, NORMAL CHARGING AND MAKEUP, PRESSURIZER | | HEATERS AND SPRAYS, AND THE REACTOR COOLANT PUMPS ARE BEING UTILIZED FOR | | PRIMARY SYSTEM INVENTORY, PRESSURE, AND TRANSPORT CONTROL. | | | | THE LICENSEE WILL NOTIFY THE NRC RESIDENT INSPECTOR. | | | | * * * UPDATE 1354 4/23/96 FROM MEADE TAKEN BY STRANSKY * * * | | | | LICENSEE IS RETRACTING THIS NOTIFICATION. DURING FURTHER REVIEW OF THIS | | EVENT, THE LICENSEE HAS DETERMINED THAT ADDITIONAL REDUNDANT FUNCTIONS WERE | | AVAILABLE TO PROVIDE A TURBINE TRIP FUNCTION. THE NRC RESIDENT INSPECTOR | | HAS BEEN INFORMED BY THE LICENSEE. NOTIFIED R2DO (LESSER). | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 30337 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: FARLEY REGION: 2 |NOTIFICATION DATE: 04/22/96 | |UNIT: [ ] [2] [ ] STATE: AL |NOTIFICATION TIME: 20:01 [ET]| |RX TYPE: [1] W-3-LP,[2] W-3-LP |EVENT DATE: 04/22/96 | +------------------------------------------------+EVENT TIME: 18:22[CDT]| |NRC NOTIFIED BY: GALLE |LAST UPDATE DATE: 04/23/96 | |HQ OPS OFFICER: BOB STRANSKY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |CASTO 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 | +-----+----------+-------+--------+-----------------+--------+-----------------+ | | | | | 2 | N Y 100 POWER OPERATION | 95 POWER OPERATION | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | TECHNICAL SPECIFICATION 3.0.3 SHUTDOWN DUE TO INOPERABILITY OF SIX STEAM | | GENERATOR TUBES (REFER TO EVENT #30328 FOR ADDITIONAL INFORMATION.) | | | | DURING A REANALYSIS OF STEAM GENERATOR TUBE EDDY CURRENT TEST RESULTS, THE | | LICENSEE DISCOVERED SIX TUBES WHICH DO NOT MEET THE F* CRITERIA FOR MINIMUM | | DISTANCE BETWEEN THE ROLL TRANSITION AREA AND THE CLOSEST INDICATION. THE | | LICENSEE DECLARED THE TUBES INOPERABLE IN ACCORDANCE WITH TECHNICAL | | SPECIFICATION 3.4.6, AND ENTERED THE ACTION STATEMENT FOR TECHNICAL | | SPECIFICATION 3.0.3 AS REQUIRED AT 1822 CDT. THE LICENSEE ALSO COMMENCED A | | UNIT SHUTDOWN AT 1834 CDT. | | | | IN ADDITION, THE LICENSEE STATED THAT AN INPO ONSITE VISIT WAS IN PROGRESS | | WHEN INPO REPRESENTATIVES IDENTIFIED CONCERNS WITH THE LICENSEE'S | | INTERPRETATION OF THE F* CRITERIA. THE LICENSEE FURTHER STATED THAT THE | | USE OF ROTATING PANCAKE COIL (RPC) EDDY CURRENT RESULTS WERE PERMITTED BY | | THE NRC IN THE REANALYSIS OF A STEAM GENERATOR TUBE INDICATION ON APRIL 19, | | 1996. HOWEVER, APPLICATION OF RPC RESULTS TO OTHER TUBES HAS RESULTED IN | | THE DETERMINATION THAT THESE SIX TUBES ARE INOPERABLE. | | | | THE NRC RESIDENT INSPECTOR WILL BE INFORMED BY THE LICENSEE. | | | | *** 0035 EDT APRIL 23, 1996, UPDATE FROM OLDFIELD RECEIVED BY TROCINE *** | | | | AT 2308 CDT, THE NRC GRANTED A NOTICE OF ENFORCEMENT DISCRETION TO ALLOW | | UNIT 2 TO CONTINUE POWER OPERATION WITH THE SIX TUBES THAT WERE PREVIOUSLY | | IDENTIFIED TO BE INOPERABLE FOR NOT MEETING THE F* CRITERIA. TECHNICAL | | SPECIFICATION 3.0.3 WAS EXITED AT THAT TIME, AND LOAD REDUCTION HALTED AT | | 35% REACTOR POWER. THE LICENSEE IS CURRENTLY MAKING PREPARATIONS TO RETURN | | TO 100% REACTOR POWER AND PLANS TO CONTINUE STEAM GENERATOR TUBE | | EVALUATIONS TO VERIFY THAT THERE ARE NO FURTHER TUBE PROBLEMS DUE TO | | FAILURE TO MEET THE F* CRITERIA. | | | | THE LICENSEE NOTIFIED THE NRC RESIDENT INSPECTOR. THE NRC OPERATIONS | | CENTER NOTIFIED THE R2DO (CASTO). | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 30340 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: CALVERT CLIFFS REGION: 1 |NOTIFICATION DATE: 04/23/96 | |UNIT: [1] [ ] [ ] STATE: MD |NOTIFICATION TIME: 04:37 [ET]| |RX TYPE: [1] CE,[2] CE |EVENT DATE: 04/23/96 | +------------------------------------------------+EVENT TIME: 04:15[EDT]| |NRC NOTIFIED BY: MONT SECKENS |LAST UPDATE DATE: 04/23/96 | |HQ OPS OFFICER: LEIGH TROCINE +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |GENE KELLY RDO | |AMED 50.72(b)(2)(v) OFFSITE MEDICAL | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | N N 0 REFUELING | 0 REFUELING | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | INDIVIDUAL WITH POSSIBLE HIP AND LEG INJURY TRANSPORTED OFFSITE WHILE | | WEARING CONTAMINATED PROTECTIVE CLOTHING. | | | | AN INDIVIDUAL FELL OFF OF A LADDER IN THE UNIT 1 CONTAINMENT, HIT A | | LANDING, AND ROLLED INTO A PUMP BAY. THE DISTANCE OF THE FALL WAS | | ESTIMATED TO BE APPROXIMATELY 20 FEET TOTAL. THE INDIVIDUAL'S LEG WAS | | POSSIBLY FRACTURED, AND HIS HIP MAY HAVE BEEN INJURED. AS A RESULT, THE | | LICENSEE TRANSPORTED THE INDIVIDUAL VIA AN AMBULANCE TO THE CALVERT | | MEMORIAL HOSPITAL AT 0415. THE INDIVIDUAL WAS STILL WEARING HIS | | CONTAMINATED PROTECTIVE CLOTHING DUE TO THE NATURE OF THE INJURIES. HEALTH | | PHYSICS PERSONNEL ACCOMPANIED THE INDIVIDUAL TO THE HOSPITAL. THE MAXIMUM | | CONTAMINATION ON THE PROTECTIVE CLOTHING WAS ESTIMATED TO BE ABOUT 10,000 | | DISINTEGRATIONS PER MINUTES PER SQUARE CENTIMETER BECAUSE OF THE AREA THAT | | THE INDIVIDUAL WAS WORKING IN. | | | | THE LICENSEE NOTIFIED THE NRC RESIDENT INSPECTOR. | | | | * * * UPDATE 1540 4/23/96 FROM SLY TAKEN BY STRANSKY * * * | | | | THE LICENSEE REPORTED THAT THE INITIAL REPORT OF THIS EVENT OVERSTATED THE | | EXTENT OF THE FALL AND THE INJURIES SUSTAINED. THE INDIVIDUAL FELL | | APPROXIMATELY EIGHT FEET, AND WAS ONLY SLIGHTLY INJURED. HE RETURNED TO | | WORK TODAY. ADDITIONALLY, MINIMAL AMOUNTS OF CONTAMINATION WERE FOUND ON | | THE INDIVIDUAL'S PROTECTIVE SHOE COVERS UPON ARRIVAL AT THE HOSPITAL. THE | | NRC RESIDENT INSPECTOR WILL BE INFORMED BY THE LICENSEE. NOTIFIED R1DO | | (KELLY). | | | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 30341 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: INDIAN POINT REGION: 1 |NOTIFICATION DATE: 04/23/96 | |UNIT: [2] [ ] [ ] STATE: NY |NOTIFICATION TIME: 05:18 [ET]| |RX TYPE: [2] W-4-LP,[3] W-4-LP |EVENT DATE: 04/23/96 | +------------------------------------------------+EVENT TIME: 04:19[EDT]| |NRC NOTIFIED BY: JOHN MANSELL |LAST UPDATE DATE: 04/23/96 | |HQ OPS OFFICER: LEIGH TROCINE +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |GENE KELLY 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 +------------------------------------------------------------------------------+ | STATE AGENCIES NOTIFIED OF OIL SPILL ON SITE. | | | | VENDOR (R.J. GUARRERA) WAS PUMPING OIL FROM A TANKER TRUCK TO THE NORTH GAS | | TURBINE #1 OIL TANK ON THE 15-FOOT ELEVATION, AND THE DISCHARGE HOSE | | DISCONNECTED FROM THE PUMP. AS A RESULT, APPROXIMATELY 20 GALLONS OF OIL | | SPILLED ONTO THE 15-FOOT ELEVATION. THE LEAK WAS IMMEDIATELY STOPPED, AND | | IT WAS CONTAINED ON THE PAVEMENT UNDER AND AROUND THE TRUCK. IT DID NOT | | REACH ANY STORM DRAINS OR THE RIVER. CLEANUP IS CURRENTLY IN PROGRESS AND | | IS ESTIMATED TO BE COMPLETED WITHIN APPROXIMATELY TWO HOURS. THIS EVENT IS | | REPORTABLE BECAUSE THE QUANTITY WAS GREATER THAN FIVE GALLONS. | | | | THE LICENSEE NOTIFIED THE NEW YORK STATE DEPARTMENT OF ENVIRONMENTAL | | CONTROL, THE WESTCHESTER HEALTH DEPARTMENT, INDIAN POINT UNIT 3, AND THE | | NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 30342 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: SURRY REGION: 2 |NOTIFICATION DATE: 04/23/96 | |UNIT: [1] [2] [ ] STATE: VA |NOTIFICATION TIME: 08:06 [ET]| |RX TYPE: [1] W-3-LP,[2] W-3-LP |EVENT DATE: 04/23/96 | +------------------------------------------------+EVENT TIME: 06:59[EDT]| |NRC NOTIFIED BY: DONALD HART |LAST UPDATE DATE: 04/23/96 | |HQ OPS OFFICER: LEIGH TROCINE +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |CHARLES CASTO 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 | | 2 | N Y 100 POWER OPERATION | 100 POWER OPERATION | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | FAILURE OF THE EMERGENCY RESPONSE FACILITY COMPUTER SYSTEM COMPUTER | | | | THE EMERGENCY RESPONSE FACILITY COMPUTER SYSTEM (ERFCS) COMPUTER FAILED AT | | 0659. ATTEMPTS TO REBOOT THE COMPUTER THUS FAR HAVE BEEN UNSUCCESSFUL, AND | | TROUBLESHOOTING EFFORTS ARE CURRENTLY UNDERWAY. INDICATIONS ARE THAT LOW | | VOLTAGE IS THE CAUSE OF THE FAILURE. | | | | THE ERFCS COMPUTER IS USED AS AN ACCIDENT ASSESSMENT CAPABILITY TOOL TO | | MONITOR PLANT CRITICAL PARAMETERS. IT IS ALSO USED AS AN ALTERNATE MEANS | | OF INDICATION DURING NORMAL PLANT OPERATIONS. ALTHOUGH THE LICENSEE | | CONSIDERS THIS TO BE A MAJOR LOSS OF EMERGENCY ASSESSMENT CAPABILITY, THE | | PRIMARY MEANS OF INDICATION (THE CONTROL ROOM PANELS AND ANNUNCIATORS) IS | | AVAILABLE. | | | | THE LICENSEE WILL NOTIFY THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 30343 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: CALVERT CLIFFS REGION: 1 |NOTIFICATION DATE: 04/23/96 | |UNIT: [1] [2] [ ] STATE: MD |NOTIFICATION TIME: 11:47 [ET]| |RX TYPE: [1] CE,[2] CE |EVENT DATE: 04/23/96 | +------------------------------------------------+EVENT TIME: 11:30[EDT]| |NRC NOTIFIED BY: GROOMS |LAST UPDATE DATE: 04/23/96 | |HQ OPS OFFICER: BOB STRANSKY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |KELLY 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 | | 2 | N Y 100 POWER OPERATION | 100 POWER OPERATION | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | LICENSEE MADE NOTIFICATION TO MARYLAND DEPARTMENT OF THE ENVIRONMENT. | | | | THE LICENSEE NOTIFIED THE MD DEPT OF ENVIRONMENT THAT THE OXYGEN MONITOR | | FOR THE CHESAPEAKE BAY WAS INOPERABLE FROM 1145 ON 4/18/96 UNTIL 0815 | | 4/23/96. THE NRC RESIDENT INSPECTOR HAS BEEN INFORMED BY THE LICENSEE. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 30344 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: MILLSTONE REGION: 1 |NOTIFICATION DATE: 04/23/96 | |UNIT: [ ] [ ] [3] STATE: CT |NOTIFICATION TIME: 15:15 [ET]| |RX TYPE: [1] GE-3,[2] CE,[3] W-4-LP |EVENT DATE: 04/23/96 | +------------------------------------------------+EVENT TIME: 15:08[EDT]| |NRC NOTIFIED BY: PAUL MALVAHN |LAST UPDATE DATE: 04/23/96 | |HQ OPS OFFICER: BOB STRANSKY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |KELLY 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 | +-----+----------+-------+--------+-----------------+--------+-----------------+ | | | | | | | | | 3 | N N 0 COLD SHUTDOWN | 0 COLD SHUTDOWN | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | SHUTDOWN MONITOR ALARM SETPOINTS SET NONCONSERVATIVELY HIGH. | | | | THE LICENSEE HAS DETERMINED THAT THE ALARM SETPOINTS FOR THE SHUTDOWN | | MARGIN MONITORS ARE SET TOO HIGH TO PERMIT OPERATOR ACTIONS TO MITIGATE A | | DILUTION EVENT WITHIN THE 15 MINUTES ASSUMED IN THE PLANT FSAR. THE | | LICENSEE STATED THAT THIS CONDITION AFFECTS BOTH CHANNELS OF THE SHUTDOWN | | MONITORS. THE LICENSEE IS CURRENTLY INVESTIGATING THIS ISSUE TO DETERMINE | | CORRECTIVE ACTIONS. | | | | THE LICENSEE NOTIFIED THE NRC RESIDENT INSPECTOR AS WELL AS LOCAL | | GOVERNMENT AGENCIES. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 30345 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: BYRON REGION: 3 |NOTIFICATION DATE: 04/23/96 | |UNIT: [1] [ ] [ ] STATE: IL |NOTIFICATION TIME: 15:44 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 04/23/96 | +------------------------------------------------+EVENT TIME: 13:25[CDT]| |NRC NOTIFIED BY: SMITH |LAST UPDATE DATE: 04/23/96 | |HQ OPS OFFICER: BOB STRANSKY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |FARBER 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 +------------------------------------------------------------------------------+ | LICENSEE REQUESTED OFFSITE FIRE FIGHTING ASSISTANCE DUE TO FIRE IN COOLING | | TOWER. | | | | WHILE PERFORMING MODIFICATIONS ON THE UNIT 1 NATURAL DRAFT COOLING TOWER, | | THE LICENSEE NOTICED A FIRE. THE COOLING TOWER IS LOCATED OUTSIDE OF THE | | PROTECTED AREA OF THE PLANT. OFFSITE ASSISTANCE WAS REQUESTED TO | | EXTINGUISH THE FIRE. THE FIRE WAS EXTINGUISHED AT 1406 CDT. THE LICENSEE | | HAS NOTIFIED THE NRC RESIDENT INSPECTOR AND PLANS TO MAKE A PRESS RELEASE. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 30346 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: ZION REGION: 3 |NOTIFICATION DATE: 04/23/96 | |UNIT: [1] [2] [ ] STATE: IL |NOTIFICATION TIME: 16:43 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 04/23/96 | +------------------------------------------------+EVENT TIME: 15:20[CDT]| |NRC NOTIFIED BY: MUNDT |LAST UPDATE DATE: 04/23/96 | |HQ OPS OFFICER: BOB STRANSKY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |FARBER 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 1 STARTUP | 1 STARTUP | | 2 | N Y 99 POWER OPERATION | 99 POWER OPERATION | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | ECCS ACCUMULATORS COULD HAVE BEEN PREVENTED FROM MITIGATING LOCA DURING | | PRESSURE AND LEVEL EQUALIZATION ACTIVITIES. | | | | THE LICENSEE WAS NOTIFIED BY WESTINGHOUSE THAT CROSS-CONNECTION OF SAFETY | | INJECTION ACCUMULATORS COULD, UNDER LARGE-BREAK LOCA CONDITIONS, RESULT IN | | PRESSURE FROM BOTH CONNECTED ACCUMULATORS BLEEDING OFF THROUGH THE FAULTED | | REACTOR COOLANT SYSTEM LOOP. [HOO NOTE: SEE RELATED EVENT REPORTS #30106 | | AND 30172.] THE LICENSEE HAS ROUTINELY CROSS-CONNECTED ACCUMULATORS IN | | ORDER TO EQUALIZE PRESSURES AND WATER LEVELS. | | | | THE LICENSEE HAS ISSUED A STANDING ORDER WHICH PROHIBITS THE | | CROSS-CONNECTION OF SI ACCUMULATORS, AND CAUTION TAGS HAVE BEEN PLACED ON | | THE ACCUMULATOR PRESSURE AND LEVEL AIR-OPERATED VALVES. THE LICENSEE IS | | ALSO MAKING CHANGES TO PLANT PROCEDURES TO PROHIBIT CROSS-CONNECTION OF THE | | ACCUMULATORS. THE NRC RESIDENT INSPECTOR HAS BEEN INFORMED BY THE | | LICENSEE. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 30347 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: HATCH REGION: 2 |NOTIFICATION DATE: 04/23/96 | |UNIT: [1] [2] [ ] STATE: GA |NOTIFICATION TIME: 17:31 [ET]| |RX TYPE: [1] GE-4,[2] GE-4 |EVENT DATE: 04/23/96 | +------------------------------------------------+EVENT TIME: 16:18[EDT]| |NRC NOTIFIED BY: HAMMONDS |LAST UPDATE DATE: 04/23/96 | |HQ OPS OFFICER: BOB STRANSKY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |LESSER 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 COLD SHUTDOWN | 0 COLD SHUTDOWN | | 2 | N Y 100 POWER OPERATION | 100 POWER OPERATION | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | A CONTRACT SUPERVISOR WAS DETERMINED TO BE UNDER THE INFLUENCE OF ILLEGAL | | DRUGS DURING A RANDOM TEST. (THE TEST WAS CONFIRMED POSITIVE.) THE | | INDIVIDUAL'S ACCESS HAS BEEN TERMINATED, AND THE LICENSEE IS REVIEWING | | RECENT WORK PERFORMED BY THE INDIVIDUAL. SEE HOO LOG FOR DETAILS. THE NRC | | RESIDENT INSPECTOR HAS BEEN INFORMED BY THE LICENSEE. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 30348 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: BRAIDWOOD REGION: 3 |NOTIFICATION DATE: 04/23/96 | |UNIT: [1] [2] [ ] STATE: IL |NOTIFICATION TIME: 17:48 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 04/23/96 | +------------------------------------------------+EVENT TIME: 16:00[CDT]| |NRC NOTIFIED BY: HABEL |LAST UPDATE DATE: 04/23/96 | |HQ OPS OFFICER: BOB STRANSKY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |FARBER 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 | | 2 | N N 0 COLD SHUTDOWN | 0 COLD SHUTDOWN | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | MULTIPLE ECCS ACCUMULATORS COULD HAVE BEEN PREVENTED FROM MITIGATING LOCA | | DURING PRESSURE AND LEVEL EQUALIZATION ACTIVITIES. | | | | FOLLOWING DETAILED REVIEW OF INDUSTRY EVENTS REGARDING CROSS-CONNECTION OF | | ECCS ACCUMULATORS, THE LICENSEE HAS DETERMINED THAT, IN THE PAST, MULTIPLE | | SI ACCUMULATORS (MORE THAN TWO) HAVE BEEN CROSS-CONNECTED DURING PRESSURE | | AND LEVEL EQUALIZATION ACTIVITIES. [HOO NOTE: SEE RELATED EVENT REPORTS | | #30106, 30172 AND 30346.] IN THIS CONFIGURATION, A LARGE-BREAK LOCA COULD | | CAUSE MULTIPLE ACCUMULATORS TO BLEED OFF PRESSURE THROUGH THE FAULTED LOOP. | | | | THE LICENSEE HAS NOTIFIED THE NRC RESIDENT INSPECTOR OF THIS EVENT. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 30349 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: BYRON REGION: 3 |NOTIFICATION DATE: 04/23/96 | |UNIT: [1] [2] [ ] STATE: IL |NOTIFICATION TIME: 18:22 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 04/23/96 | +------------------------------------------------+EVENT TIME: 16:45[CDT]| |NRC NOTIFIED BY: SMITH |LAST UPDATE DATE: 04/23/96 | |HQ OPS OFFICER: BOB STRANSKY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |FARBER 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 N 0 REFUELING | 0 REFUELING | | 2 | N Y 100 POWER OPERATION | 100 POWER OPERATION | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | CROSS-CONNECTION OF MORE THAN TWO ECCS ACCUMULATORS PLACES UNITS OUTSIDE OF | | DESIGN BASES. | | | | ON APRIL 17, 1996, BASED UPON REVIEW OF RECENT 10 CFR 50.72 REPORTS BY | | OTHER LICENSEES, A CONCERN WAS IDENTIFIED REGARDING THE PRACTICE OF | | CROSS-CONNECTING SAFETY INJECTION ACCUMULATORS. PLANT PROCEDURES PERMIT | | THE TRANSFER OF NITROGEN AND WATER THROUGH COMMON FILL LINES FROM ONE | | ACCUMULATOR TO ANOTHER. A PROBLEM IDENTIFICATION FORM WAS WRITTEN AND | | ASSIGNED TO SITE ENGINEERING FOR AN OPERABILITY DETERMINATION. PENDING | | COMPLETION OF THE OPERABILITY DETERMINATION, A DAILY ORDER WAS PUT IN PLACE | | TO INSTRUCT OPERATORS NOT TO CROSS-CONNECT THE ACCUMULATORS. ADDITIONALLY, | | CAUTION CARDS WERE PLACED ON ACCUMULATOR FILL VALVE CONTROL SWITCHES. | | | | ON APRIL 23, 1991, THE LICENSEE DETERMINED THAT HAVING MORE THAN TWO | | ACCUMULATORS CROSS-CONNECTED DURING A LARGE-BREAK LOCA IS NOT CONSIDERED IN | | THE PLANT SAFETY ANALYSIS. THEREFORE, CROSS-CONNECTION OF MORE THAN TWO SI | | ACCUMULATORS PLACES THE PLANT OUTSIDE OF ITS DESIGN BASIS. AT 1645 ON | | 4/23/96, THE LICENSEE DETERMINED THAT MORE THAN TWO ACCUMULATORS MAY HAVE | | BEEN CROSS-CONNECTED IN THE PAST. PLANT PROCEDURES WILL BE REVISED TO | | PROHIBIT THE CROSS-CONNECTION OF MORE THAN TWO ACCUMULATORS DURING PERIODS | | WHEN THEY ARE REQUIRED TO BE OPERABLE. THE LICENSEE HAS NOTIFIED THE NRC | | RESIDENT INSPECTOR OF THIS ISSUE. [HOO NOTE: SEE EVENT REPORTS #30346 AND | | 30348 FOR RELATED NOTIFICATIONS FROM OTHER CECo UNITS.] | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 30350 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: MILLSTONE REGION: 1 |NOTIFICATION DATE: 04/23/96 | |UNIT: [ ] [2] [ ] STATE: CT |NOTIFICATION TIME: 21:30 [ET]| |RX TYPE: [1] GE-3,[2] CE,[3] W-4-LP |EVENT DATE: 04/23/96 | +------------------------------------------------+EVENT TIME: 21:11[EDT]| |NRC NOTIFIED BY: NELSON |LAST UPDATE DATE: 04/23/96 | |HQ OPS OFFICER: BOB STRANSKY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |KELLY 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 | +-----+----------+-------+--------+-----------------+--------+-----------------+ | | | | | 2 | N N 0 COLD SHUTDOWN | 0 COLD SHUTDOWN | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | SINGLE FAILURE COULD RENDER ENCLOSURE BUILDING FILTRATION SYSTEM INOPERABLE | | | | THE LICENSEE HAS DISCOVERED A SINGLE FAILURE THAT COULD RENDER THE | | ENCLOSURE BUILDING FILTRATION SYSTEM INOPERABLE. THE SYSTEM HAS TWO | | PARALLEL VENTILATION PATHS WHICH GO FROM THE CONTAINMENT, THROUGH TWO | | VALVES IN SERIES (FOUR VALVES TOTAL), INTO A COMMON PLENUM, AND THEN TO TWO | | CHARCOAL FILTER UNITS. THE SYSTEM IS INTERLOCKED SUCH THAT WHEN ANY ONE OF | | THE VALVES IS OPEN, ELECTRIC HEATERS IN THE CHARCOAL FILTERS ARE TURNED | | OFF. THE INTERLOCK EXISTS DUE TO POST-ACCIDENT HYDROGEN COMBUSTION | | CONCERNS. THE HEATERS ARE NECESSARY TO PREVENT MOISTURE BUILDUP IN THE | | CHARCOAL ADSORBER MEDIUM, WHICH DECREASES THE EFFICIENCY OF THE FILTER. | | | | THE LICENSEE POSTULATES THAT, IF ONE VALVE STAYS OPEN AFTER USAGE, THE | | HEATERS WOULD REMAIN INTERLOCKED OFF, AND THE FILTERS WOULD BECOME | | INEFFECTIVE. THE LICENSEE ROUTINELY USES THIS SYSTEM DURING OPERATION TO | | MAINTAIN PRESSURE CONTROL IN THE REACTOR CONTAINMENT. THE LICENSEE INTENDS | | TO ADDRESS THIS ISSUE BEFORE STARTUP. THE NRC RESIDENT INSPECTOR HAS BEEN | | INFORMED BY THE LICENSEE. | +------------------------------------------------------------------------------+