U.S. Nuclear Regulatory Commission Operations Center Event Reports For 10/30/95 - 10/31/95 ** EVENT NUMBERS ** 29347 29462 29474 29509 29522 29523 29524 29525 29526 29527 29528 !!!!!!!!! THIS EVENT HAS BEEN RETRACTED. THIS EVENT HAS BEEN RETRACTED !!!!!!! +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 29347 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: COOK REGION: 3 |NOTIFICATION DATE: 09/19/95 | |UNIT: [ ] [2] [ ] STATE: MI |NOTIFICATION TIME: 16:39 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 09/19/95 | +------------------------------------------------+EVENT TIME: 16:00[EDT]| |NRC NOTIFIED BY: RANDY PTACEK |LAST UPDATE DATE: 10/30/95 | |HQ OPS OFFICER: DOUG WEAVER +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |ROGER LANKSBURY RDO | |AOUT 50.72(b)(1)(ii)(B) OUTSIDE DESIGN BASIS | | |NLCO TECH SPEC LCO A/S | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |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 +------------------------------------------------------------------------------+ | - BOTH COMPONENT COOLING WATER PUMPS (CCW) INOPERABLE FOR 12 MINUTES - | | | | THE PLANT ENTERED TECH SPEC 3.0.3 WHEN THE DISCHARGE CHECK VALVE OF THE | | EAST CCW PUMP STUCK OPEN. THE EAST PUMP WAS DECLARED INOPERABLE BECAUSE OF | | THE STUCK OPEN CHECK VALVE. THE WEST PUMP, WHICH IS IN PARALLEL OPERATION | | WITH THE EAST PUMP, WAS ALSO DECLARED INOPERABLE BECAUSE OF THE REVERSE | | FLOW THAT WOULD OCCUR THROUGH THE EAST PUMP. | | | | TECH SPEC 3.0.3 WAS EXITED WHEN THE EAST PUMP WAS MANUALLY ISOLATED, THUS | | PREVENTING REVERSE FLOW THROUGH THE PUMP AND CHECK VALVE. THE PLANT IS NOW | | IN TECH SPEC 3.7.3.1 BECAUSE OF THE ONE INOPERABLE CCW PUMP. THIS IS A 72 | | HOUR LCO. CHECK VALVE REPAIR IS IN PROGRESS. | | | | THE LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. | | | | * * * UPDATE AT 1449 ON 10/30/95 BY WEST TAKEN BY WEAVER * * * | | | | THE LICENSEE IS RETRACTING THIS EVENT BASED ON FURTHER INVESTIGATION. THE | | LICENSEE HAS CALCULATED THAT THE WEST CCW PUMP WOULD HAVE BEEN ABLE TO | | SUPPLY THE DESIGN BASIS COOLING FLOW UNDER THE CIRCUMSTANCES OF THIS EVENT. | | THE RESIDENT INSPECTOR HAS BEEN NOTIFIED OF THE RETRACTION. THE HOO | | NOTIFIED THE R3DO (MILLER). | +------------------------------------------------------------------------------+ !!!!!!!!! THIS EVENT HAS BEEN RETRACTED. THIS EVENT HAS BEEN RETRACTED !!!!!!! +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 29462 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: SOUTH TEXAS REGION: 4 |NOTIFICATION DATE: 10/15/95 | |UNIT: [ ] [2] [ ] STATE: TX |NOTIFICATION TIME: 18:25 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 10/15/95 | +------------------------------------------------+EVENT TIME: 15:25[CDT]| |NRC NOTIFIED BY: WALT SMITH |LAST UPDATE DATE: 10/30/95 | |HQ OPS OFFICER: JOHN MacKINNON +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |PHIL HARRELL 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 | +-----+----------+-------+--------+-----------------+--------+-----------------+ | | | | | 2 | N N 0 REFUELING | 0 REFUELING | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | LICENSEE INFORMED BY WYLIE LABS THAT ONE OF THEIR PRESSURIZER SAFETY VALVES | | SETPOINT WHEN TESTED FAILED LOW. | | | | PRESSURIZER SAFETY VALVE PSV-3452 FOUND OUT OF TOLERANCE DURING TESTING IN | | ACCORDANCE WITH TECHNICAL SPECIFICATION 4.0.5. WYLIE LABS SAID THAT | | PSV-3452 LIFTED AT 2402 psig. TECHNICAL SPECIFICATION SETPOINT OF THE | | PRESSURIZER SAFETY VALVES IS 2485ñ2% psig. PRESSURIZER SAFETY VALVE | | PSV-3450 WHEN TESTED WAS FOUND WITHIN ITS TECHNICAL SPECIFICATION LIFT | | SETPOINT OF 2485ñ2% psig. PRESSURIZER SAFETY VALVE PSV-3451 HAS NOT BEEN | | TESTED. LICENSEE DID NOT KNOW THE MANUFACTURER OF THEIR PRESSURIZER SAFETY | | VALVES. REACTOR VESSEL IS DEFUELED. | | | | RESIDENT INSPECTOR WAS NOTIFIED BY THE LICENSEE. | | | | * * * UPDATE 1040 10/30/95 FROM HARRISON AKEN BY STRANSKY * * * | | | | THE LICENSEE IS RETRACTING THIS NOTIFICATION. THE LICENSEE HAS PERFORMED | | AN ANALYSIS AND HAS DETERMINED THAT THE PLANT WAS NOT OUTSIDE OF ITS DESIGN | | BASIS. THE NRC RESIDENT INSPECTOR HAS BEEN INFORMED. NOTIFIED R4DO | | (POWERS). | +------------------------------------------------------------------------------+ !!!!!!!!! THIS EVENT HAS BEEN RETRACTED. THIS EVENT HAS BEEN RETRACTED !!!!!!! +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 29474 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: SOUTH TEXAS REGION: 4 |NOTIFICATION DATE: 10/19/95 | |UNIT: [1] [ ] [ ] STATE: TX |NOTIFICATION TIME: 01:25 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 10/18/95 | +------------------------------------------------+EVENT TIME: 21:55[CDT]| |NRC NOTIFIED BY: ROYCE BROWN |LAST UPDATE DATE: 10/30/95 | |HQ OPS OFFICER: RUDY KARSCH +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |PHIL HARRELL 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 +------------------------------------------------------------------------------+ | COMPONENT COOLING WATER PUMP "1A" AUTO-STARTED FOR REASONS STILL TO BE | | DETERMINED. THE LICENSEE SUSPECTS A DEFECTIVE PRESSURE SWITCH IS THE CAUSE | | OF THE UNEXPECTED START. TROUBLE SHOOTING IS PROGRESSING. THE PUMP IS | | STILL RUNNING AND IS CONSIDERED OPERABLE. THE LICENSEE WILL INFORM THE NRC | | RESIDENT INSPECTOR. | | | | * * * UPDATE 1040 10/30/95 FROM HARRISON TAKEN BY STRANSKY * * * | | | | LICENSEE IS RETRACTING THIS NOTIFICATION. THE LICENSEE HAS DETERMINED THAT | | THE AUTO START OF THE CCW PUMP DOES NOT MEET THE CRITERIA FOR AN ESF | | ACTUATION. THE NRC RESIDENT INSPECTOR HAS BEEN INFORMED. NOTIFIED R4DO | | (POWERS). | +------------------------------------------------------------------------------+ !!!!!!!!! THIS EVENT HAS BEEN RETRACTED. THIS EVENT HAS BEEN RETRACTED !!!!!!! +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 29509 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: SOUTH TEXAS REGION: 4 |NOTIFICATION DATE: 10/26/95 | |UNIT: [1] [ ] [ ] STATE: TX |NOTIFICATION TIME: 01:30 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 10/25/95 | +------------------------------------------------+EVENT TIME: 21:27[CDT]| |NRC NOTIFIED BY: TIM BOWMAN |LAST UPDATE DATE: 10/30/95 | |HQ OPS OFFICER: LEIGH TROCINE +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |LINDA HOWELL 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 +------------------------------------------------------------------------------+ | AUTOMATIC START OF A COMPONENT COOLING WATER (CCW) PUMP DUE TO AN APPARENT | | FAILURE OF AN ESSENTIAL COOLING WATER (ECW) PUMP DISCHARGE PRESSURE SWITCH | | | | AT 21:27 CDT, CCW PUMP 1B AUTOMATICALLY STARTED DUE TO AN APPARENT FAILURE | | OF THE ECW PUMP 1A DISCHARGE PRESSURE LOW SWITCH (PSL-6880A). CCW PUMP 1B | | IS DESIGNED TO AUTOMATICALLY START ON A LOW ECW DISCHARGE PRESSURE | | CONDITION ON ECW TRAINS 'A' AND 'C' WITH THE CCW/ECW MODE SELECTOR SWITCH | | IN THE 'STANDBY' POSITION. THE AUTOMATIC STARTING OF CCW PUMP 1B IS A | | NON-EMERGENCY AUTOMATIC ACTUATION OF AN ENGINEERED SAFEGUARDS FEATURE | | COMPONENT. | | | | PRIOR TO THE AUTOMATIC START OF CCW PUMP 1B, IT WAS IN THE STANDBY | | CONDITION, AND ALL THREE TRAINS OF ECW PUMPS WERE RUNNING. AT 21:25 CDT, | | THE CONTROL ROOM OPERATORS SECURED ECW PUMP 1C WITH THE TRAIN 'B' CCW/ECW | | MODE SELECTOR SWITCH IN THE 'OFF' POSITION. AT 21:27 CDT, THE CONTROL ROOM | | OPERATORS RETURNED THE TRAIN 'B' CCW/ECW MODE SELECTOR SWITCH TO THE | | 'STANDBY' POSITION; AND FOLLOWING A 15 SECOND TIME DELAY, CCW PUMP 1B | | AUTOMATICALLY STARTED DUE TO THE LOW DISCHARGE PRESSURE CONDITION ON ECW | | TRAIN 'C' AND DUE TO A FAILED DISCHARGE PRESSURE LOW SWITCH ON ECW TRAIN | | 'A'. CCW PUMP 1B FUNCTIONED AS DESIGNED THROUGHOUT THE EVENT. | | | | THE LICENSEE NOTIFIED THE NRC RESIDENT INSPECTOR. | | | | * * * UPDATE 1040 10/30/95 FROM HARRISON TAKEN BY STRANSKY * * * | | | | THE LICENSEE IS RETRACTING THIS NOTIFICATION. THE LICENSEE HAS DETERMINED | | THAT THE AUTO START OF THE CCW PUMP DOES NOT MEET THE CRITERIA FOR AN ESF | | ACTUATION. THE NRC RESIDENT INSPECTOR HAS BEEN INFORMED. NOTIFIED R4DO | | (POWERS). | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 29522 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: HATCH REGION: 2 |NOTIFICATION DATE: 10/30/95 | |UNIT: [ ] [2] [ ] STATE: GA |NOTIFICATION TIME: 11:30 [ET]| |RX TYPE: [1] GE-4,[2] GE-4 |EVENT DATE: 10/30/95 | +------------------------------------------------+EVENT TIME: 10:05[EST]| |NRC NOTIFIED BY: BEINKE |LAST UPDATE DATE: 10/30/95 | |HQ OPS OFFICER: BOB STRANSKY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |MCALPINE 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 +------------------------------------------------------------------------------+ | AUTO START OF EMERGENCY DIESEL GENERATOR DURING SYSTEM RESTORATION | | | | FOLLOWING PERFORMANCE OF A TEST OF THE "2C" EMERGENCY DIESEL GENERATOR, AN | | ENGINEER WAS RESTORING THE ELECTRICAL SYSTEM TO ITS NORMAL LINEUP. THE | | ENGINEER WAS LOOKING FOR A KNIFE SWITCH INSIDE A 4160-VAC BREAKER CUBICLE, | | AND WHEN HE DID NOT IMMEDIATELY FIND IT, HE OPENED A SMALLER CABINET INSIDE | | THE CUBICLE. THE CABINET HOUSED THE BUS POTENTIAL TRANSFORMER, AND WHEN | | THE ENGINEER OPENED THE CABINET DOOR, THE POTENTIAL TRANSFORMER FUSES WERE | | DISCONNECTED. THIS CAUSED A MOMENTARY SENSED UNDERVOLTAGE CONDITION ON THE | | 4160-VAC BUS, AND THE "2C" EDG AUTOMATICALLY STARTED. | | | | THE ENGINEER IMMEDIATELY RECOGNIZED HIS MISTAKE, AND CLOSED THE DOOR TO THE | | POTENTIAL TRANSFORMER. THE DIESEL GENERATOR DID NOT LOAD TO THE 4160-VAC | | BUS BECAUSE THE SENSED BUS VOLTAGE DID NOT DECREASE SUFFICIENTLY. THE | | LICENSEE PERMITTED THE EDG TO RUN WHILE INVESTIGATING THE AUTO START | | SIGNAL. THE LICENSEE SECURED THE EDG AND RESTORED THE SYSTEM TO NORMAL | | STATUS BY 1120. THE NRC RESIDENT INSPECTOR HAS BEEN INFORMED. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 29523 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: BROWNS FERRY REGION: 2 |NOTIFICATION DATE: 10/30/95 | |UNIT: [ ] [ ] [3] STATE: AL |NOTIFICATION TIME: 13:09 [ET]| |RX TYPE: [1] GE-4,[2] GE-4,[3] GE-4 |EVENT DATE: 10/30/95 | +------------------------------------------------+EVENT TIME: 09:02[CST]| |NRC NOTIFIED BY: BRYAN BOOHER |LAST UPDATE DATE: 10/30/95 | |HQ OPS OFFICER: DOUG WEAVER +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |EDWARD MCALPINE 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 | +-----+----------+-------+--------+-----------------+--------+-----------------+ | | | | | | | | | 3 | N N 0 REFUELING | 0 REFUELING | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | SCRAM DISCHARGE VENT AND DRAIN VALVES FOUND OPEN WITH THE MODE SWITCH IN | | SHUTDOWN | | | | "AFTER PLACING THE UNIT 3 REACTOR MODE SWITCH IN SHUTDOWN FOR CONTAINMENT | | INTEGRATED LEAK RATE TESTING, IT WAS NOTED THAT THE SCRAM DISCHARGE VOLUME | | VENT AND DRAIN VALVES DID NOT CLOSE AS DESIGNED. THE DESIGN FUNCTION FOR | | CLOSING THESE VALVES IS TO PREVENT INVENTORY LOSS FOLLOWING A REACTOR | | SCRAM, AND WITH THE UNIT IN COLD SHUTDOWN, NO SIGNIFICANT INVENTORY LOSS | | OCCURRED. | | | | THE SCRAM DISCHARGE VOLUME VENT AND DRAIN VALVES WERE SUBSEQUENTLY FOUND TO | | BE DOGGED OPEN. THESE VALVES WERE UNDOGGED AND THEY THEN OPERATED | | PROPERLY. THE PLANT IS CURRENTLY INVESTIGATING TO DETERMINE WHY THE VALVES | | WERE DOGGED OPEN." | | | | THE LICENSEE INDICATED THAT NO "NOTICEABLE" LEAKAGE OCCURRED FROM THE OPEN | | VENT AND DRAIN VALVES. | | | | THE LICENSEE WILL INFORM THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 29524 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: NINE MILE POINT REGION: 1 |NOTIFICATION DATE: 10/30/95 | |UNIT: [ ] [2] [ ] STATE: NY |NOTIFICATION TIME: 15:10 [ET]| |RX TYPE: [1] GE-2,[2] GE-5 |EVENT DATE: 10/30/95 | +------------------------------------------------+EVENT TIME: 11:30[EST]| |NRC NOTIFIED BY: TOM RESTUCCIO |LAST UPDATE DATE: 10/30/95 | |HQ OPS OFFICER: LEIGH TROCINE +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |WILLIAM LAZARUS 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 Y 100 POWER OPERATION | 100 POWER OPERATION | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | UNPLANNED INOPERABILITY OF A SINGLE TRAIN SAFETY SYSTEM, HIGH PRESSURE CORE | | SPRAY (HPCS) | | | | DURING THE PERFORMANCE OF A PRE-PLANNED SURVEILLANCE TEST, SERVICE WATER | | SYSTEM VALVES 2SWP*V201A AND 2SWP*V201B FAILED THE REVERSE FLOW TEST. THESE | | VALVES ARE CHECK VALVES LOCATED ON THE INLET COOLING WATER SUPPLY LINE TO | | DIVISION III EMERGENCY SWITCHGEAR UNIT COOLER 2HVC*UC102. THIS UNIT COOLER | | PROVIDES VENTILATION TO THE DIVISION III SWITCHGEAR AND CABLE AREAS. THE | | UNIT COOLER FAN IS NORMALLY RUNNING AND RECIRCULATES THE AIR IN THE | | SWITCHGEAR AND CABLE AREAS. COOLING WATER IS SUPPLIED TO THE UNIT COOLER | | BY THE SERVICE WATER SYSTEM. | | | | AT 08:46, THE DIVISION III EMERGENCY SWITCHGEAR WAS DECLARED INOPERABLE DUE | | TO THE PRE-PLANNED SURVEILLANCE TESTING. AT 11:30, THE LICENSEE FOUND THAT | | VALVES 2SWP*V201A AND 2SWP*V201B HAD FAILED THE REVERSE FLOW REQUIREMENTS. | | PER TECHNICAL SPECIFICATION 3.8.3.1, WITH THE DIVISION III EMERGENCY | | SWITCHGEAR INOPERABLE, THE LICENSEE DECLARED THE HPCS SYSTEM INOPERABLE AND | | INITIATED THE ACTIONS REQUIRED BY TECHNICAL SPECIFICATION 3.5.1. PROVIDED | | EMERGENCY CORE COOLING SYSTEM (ECCS) DIVISIONS I AND II AND THE REACTOR | | CORE ISOLATION COOLING SYSTEM ARE OPERABLE WITH THE ECCS DIVISION III | | (HPCS) INOPERABLE, TECHNICAL SPECIFICATION 3.5.1 REQUIRES THE LICENSEE TO | | RESTORE THE INOPERABLE DIVISION TO OPERABLE STATUS WITHIN 14 DAYS. | | | | THE LICENSEE INITIATED REPAIR ACTIONS TO CORRECT THESE FAILURES, AND A WORK | | REQUEST WAS INITIATED TO HAVE THESE VALVES CLEANED. FOLLOWING CLEANING, | | THE LICENSEE FOUND SOME ZEBRA MUSSELS ON THE CHECK VALVES, AND THE SPRINGS | | ON THE CHECK WERE ALSO CORRODED. THE LICENSEE NOTIFIED THE NRC RESIDENT | | INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 29525 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: SAN ONOFRE REGION: 4 |NOTIFICATION DATE: 10/30/95 | |UNIT: [1] [2] [3] STATE: CA |NOTIFICATION TIME: 15:21 [ET]| |RX TYPE: [1] W-3-LP,[2] CE,[3] CE |EVENT DATE: 10/30/95 | +------------------------------------------------+EVENT TIME: 12:00[PST]| |NRC NOTIFIED BY: CLAY WILLIAMS |LAST UPDATE DATE: 10/30/95 | |HQ OPS OFFICER: LEIGH TROCINE +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |DALE POWERS 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 DECOMMISSIONED | 0 DECOMMISSIONED | | 2 | N Y 99 POWER OPERATION | 99 POWER OPERATION | | 3 | N Y 99 POWER OPERATION | 99 POWER OPERATION | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | THE LICENSEE DISCOVERED THE POTENTIAL LOSS OF SAFEGUARDS INFORMATION. | | COMPENSATORY MEASURES WERE TAKEN UPON DISCOVERY. REFER TO THE HOO LOG FOR | | ADDITIONAL DETAILS. | | | | THE LICENSEE PLANS TO NOTIFY THE NRC RESIDENT INSPECTOR AND THE NRR PROJECT | | MANAGER (MEL FIELDS). | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 29526 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: SEABROOK REGION: 1 |NOTIFICATION DATE: 10/30/95 | |UNIT: [1] [ ] [ ] STATE: NH |NOTIFICATION TIME: 16:51 [ET]| |RX TYPE: [1] W-4-LP |EVENT DATE: 10/19/95 | +------------------------------------------------+EVENT TIME: 12:00[EST]| |NRC NOTIFIED BY: RON STRICKLAND |LAST UPDATE DATE: 10/30/95 | |HQ OPS OFFICER: DOUG WEAVER +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |WILLIAM LAZARUS 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 +------------------------------------------------------------------------------+ | ON 10/19 AND 10/26 TO 10/27 THE PLANT EXCEEDED THE LICENSED POWER LIMIT | | | | THE MAXIMUM POWER LEVEL OBTAINED WAS 100.2% (3418 MWt). THE HIGHEST 8-HOUR | | AVERAGE WAS 100.06% (3413 MWt). THE LICENSED LIMIT IS 3411 MWt. THE CAUSE | | OF THE OVER POWER WAS A FAULTY SECONDARY CALORIMETRIC. THE CALORIMETRIC | | HAS TWO MODES, FEED FLOW AND STEAM FLOW. THESE MODES CAN BE SELECTED | | MANUALLY OR AUTOMATICALLY. WHEN AUTOMATIC SELECTION IS USED THE CHOICE | | DEPENDS ON THE POWER LEVEL. FEED FLOW IS USED BELOW 90%, AND STEAM FLOW IS | | USED ABOVE 90%. | | | | ON 10/19, DURING THE PERFORMANCE OF A ROUTINE CALIBRATION, STEAM FLOW | | INSTRUMENTATION WAS FOUND TO BE CONSERVATIVELY INDICATING REACTOR POWER. | | THE STEAM FLOW INSTRUMENTATION WAS RE-CALIBRATED ALLOWING A SLIGHT INCREASE | | IN REACTOR POWER. QUESTIONS WERE LATER RAISED OVER THE CALIBRATION DATA. | | THE LICENSEE THEN MANUALLY SELECTED THE FEED FLOW CALORIMETRIC MODE, TAKING | | THE STEAM FLOW INSTRUMENTATION OUT OF THE LOOP. PRELIMINARY EVALUATION OF | | THE DATA INDICATED THAT THE REACTOR OPERATED AS HIGH AS 100.2% POWER. THE | | ROLLING 8-HOUR AVERAGE WAS 100.06% POWER. | | | | THE PLANT COMPUTER WAS COLD STARTED ON 1255 ON 10/26. UPON RESTART, THE | | CALORIMETRIC MODE WAS RE-INITIALIZED TO THE AUTO STEAM MODE. IT HAD BEEN | | RUNNING IN THE MAN FEED MODE PENDING REVIEW OF THE CALIBRATION DATA FROM | | 10/19. POST CALIBRATED STEAM FLOWS PRODUCED A STEAM FLOW BASED CALCULATED | | THERMAL POWER THAT WAS APPROXIMATELY 2 MWt LOWER THAN A FEED FLOW BASED | | CALORIMETRIC. THE CALORIMETRIC WAS PLACED BACK IN THE MAN FEED MODE ON THE | | MORNING OF THE 27TH AT ABOUT 0700. PRELIMINARY EVALUATION OF THE DATA | | INDICATED THAT THE REACTOR OPERATED AS HIGH AS 100.06% POWER DURING THIS | | PERIOD OF TIME. THE LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 29527 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: MILLSTONE REGION: 1 |NOTIFICATION DATE: 10/30/95 | |UNIT: [ ] [2] [ ] STATE: CT |NOTIFICATION TIME: 17:14 [ET]| |RX TYPE: [1] GE-3,[2] CE,[3] W-4-LP |EVENT DATE: 10/30/95 | +------------------------------------------------+EVENT TIME: 16:59[EST]| |NRC NOTIFIED BY: STEVEN SUDIGALA |LAST UPDATE DATE: 10/30/95 | |HQ OPS OFFICER: DOUG WEAVER +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |WILLIAM LAZARUS 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 | +-----+----------+-------+--------+-----------------+--------+-----------------+ | | | | | 2 | N Y 100 POWER OPERATION | 100 POWER OPERATION | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | TWO HIGH PRESSURE SAFETY INJECTION (HPSI) PUMPS LOADED ONTO ONE EMERGENCY | | BUS | | | | THE LICENSEE HAS BEEN CONDUCTING TESTING WHICH REQUIRED PLACING TWO HPSI | | PUMPS ON ONE EMERGENCY BUS. THE CONCERN IS THAT IF A LOSS OF NORMAL POWER | | SHOULD OCCUR IN CONJUNCTION WITH A SAFETY INJECTION, WHILE TESTING WAS IN | | PROGRESS, TWO PUMPS WOULD BE POWERED BY ONE EMERGENCY DIESEL. THE LICENSEE | | BELIEVES THIS IS OUTSIDE THE DESIGN BASES FOR THE EMERGENCY DIESELS. | | | | THIS TESTING MAY HAVE BEEN ROUTINELY PERFORMED SINCE THE PLANT BEGAN | | OPERATION. THE EXACT TIME FRAME WAS NOT KNOWN. THIS TESTING WILL NOT BE | | CONDUCTED UNTIL THE DESIGN BASIS ISSUES ARE RESOLVED. | | | | THE LICENSEE INFORMED THE NRC RESIDENT INSPECTOR AS WELL AS STATE AND LOCAL | | OFFICIALS. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 29528 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: CALVERT CLIFFS REGION: 1 |NOTIFICATION DATE: 10/30/95 | |UNIT: [1] [2] [ ] STATE: MD |NOTIFICATION TIME: 17:32 [ET]| |RX TYPE: [1] CE,[2] CE |EVENT DATE: 10/30/95 | +------------------------------------------------+EVENT TIME: 16:30[EST]| |NRC NOTIFIED BY: JAMES GROOMS |LAST UPDATE DATE: 10/30/95 | |HQ OPS OFFICER: DOUG WEAVER +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |WILLIAM LAZARUS 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 | | 2 | N Y 100 POWER OPERATION | 100 POWER OPERATION | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | OFFSITE NOTIFICATION OF THE LOSS OF A BAY WATER INTAKE MONITOR | | | | THE LICENSEE NOTIFIED THE MARYLAND DEPARTMENT OF ENVIRONMENTAL PROTECTION | | OF THE FAILED MONITOR. THE MONITOR MEASURES TEMPERATURE AND SALINITY OF | | INTAKE WATER. | | | | THE LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+