U.S. Nuclear Regulatory Commission Operations Center Event Reports For 03/23/95 - 03/24/95 ** EVENT NUMBERS ** 28468 28574 28575 28576 28577 28578 28579 !!!!!!!!! THIS EVENT HAS BEEN RETRACTED. THIS EVENT HAS BEEN RETRACTED !!!!!!! +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28468 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: MILLSTONE REGION: 1 |NOTIFICATION DATE: 03/02/95 | |UNIT: [ ] [2] [ ] STATE: CT |NOTIFICATION TIME: 18:41 [ET]| |RX TYPE: [1] GE-3,[2] CE,[3] W-4-LP |EVENT DATE: 03/02/95 | +------------------------------------------------+EVENT TIME: 18:20[EST]| |NRC NOTIFIED BY: BAIN |LAST UPDATE DATE: 03/23/95 | |HQ OPS OFFICER: JOHN MacKINNON +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |HAROLD GRAY 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 +------------------------------------------------------------------------------+ | CURRENT ABNORMAL OPERATING PROCEDURE PERMITS TWO SERVICE WATER PUMPS TO BE | | ELECTRICALLY ALIGNED TO THE SAME VITAL POWER FACILITY. | | | | DURING REVIEW OF ABNORMAL OPERATING PROCEDURES, A PROCEDURE WAS FOUND THAT | | WOULD ALLOW TWO SERVICE WATER PUMPS TO BE ELECTRICALLY ALIGNED TO THE SAME | | VITAL POWER FACILITY. UPON A LOSS OF NORMAL POWER, THIS CONDITION COULD | | RESULT IN THE SIMULTANEOUS START OF BOTH SERVICE WATER PUMPS (WHICH IS AN | | UNANALYZED CONDITION) THAT COULD CAUSE FAILURE OF THE OPERATING EMERGENCY | | DIESEL GENERATOR. LICENSEE IS INVESTIGATING THIS PROBLEM. | | | | RESIDENT INSPECTOR WAS INFORMED BY THE LICENSEE. | | | | * * * UPDATE AT 1636 ON 3/23/95 BY BORCHERT TAKEN BY WEAVER * * * | | THE LICENSEE RETRACTED THIS EVENT BASED ON THE FOLLOWING. 1) A SITUATION | | WITH BOTH PUMPS ALIGNED TO THE SAME BUS NEVER EXITSTED. 2) THE SINGLE | | FAILURE ANALYSIS WAS NOT IMPACTED. 3) THE EDG WOULD SUPPORT THE STARTING | | OF BOTH SERVICE WATER PUMPS SIMULTANEOUSLY. THE LICENSEE WILL INFORM THE | | NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28574 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: PERRY REGION: 3 |NOTIFICATION DATE: 03/23/95 | |UNIT: [1] [ ] [ ] STATE: OH |NOTIFICATION TIME: 12:33 [ET]| |RX TYPE: [1] GE-6 |EVENT DATE: 03/23/95 | +------------------------------------------------+EVENT TIME: 11:25[EST]| |NRC NOTIFIED BY: MIKE NEMCEK |LAST UPDATE DATE: 03/23/95 | |HQ OPS OFFICER: DOUG WEAVER +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |WAYNE KROPP 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 +------------------------------------------------------------------------------+ | AN OFFSITE NOTIFICATION WAS MADE BASED ON A RELEASE OF SODIUM HYPOCHLORITE | | | | THE LICENSEE REPORTED THE RELEASE OF 3650 GALLONS OF SODIUM HYPOCHLORITE AT | | THE PLANT'S DISCHARGE POINT. THE TOTAL RESIDUAL CHLORIDE CONCENTRATION WAS | | .21 PPM. PERRY TOWNSHIP FIRE DEPARTMENT, LAKE COUNTY EMERGENCY PLANNING | | COMMITTEE, OHIO EPA, US EPA AND THE US COAST GUARD WERE ALL NOTIFIED. | | | | THE DISCHARGE WAS CAUSED BY SEAT LEAKAGE THROUGH VALVE 1P-48-F140A. THE | | LEAK WAS DISCOVERED AT 0002 THIS MORNING WHEN TANK LEVEL WAS NOTED TO BE | | LOWER THAN EXPECTED. THE CALLER DID NOT KNOW IF A PRESS RELEASE WAS | | PLANNED. | | | | THE LICENSEE WILL INFORM THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28575 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: MONTICELLO REGION: 3 |NOTIFICATION DATE: 03/23/95 | |UNIT: [1] [ ] [ ] STATE: MN |NOTIFICATION TIME: 17:17 [ET]| |RX TYPE: [1] GE-3 |EVENT DATE: 03/23/95 | +------------------------------------------------+EVENT TIME: 14:30[CST]| |NRC NOTIFIED BY: ALLEN WOJCHOUSKI |LAST UPDATE DATE: 03/23/95 | |HQ OPS OFFICER: DOUG WEAVER +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |WAYNE KROPP RDO | |NINF INFORMATION ONLY | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |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 +------------------------------------------------------------------------------+ | BACK UP SCRAM SOLENOID VALVES NOT ENVIRONMENTALLY QUALIFIED | | | | THE B/U SCRAM SOLENOID VALVES WERE DOWN GRADED TO NON-SAFETY RELATED & | | REMOVED FROM THE EQ LIST. THE B/U SCRAM SOLENOID VALVES WERE REPLACED WITH | | COMMERCIAL SOLENOID VALVES. THE DOWN GRADING PROCESS FAILED TO IDENTIFY AN | | ASSOCIATED CIRCUIT WITH THE LOW LOW SET FUNCTION OF THE SRVs. SINCE THE | | LOW LOW SET FUNCTION IS SAFETY RELATED, THE ASSOCIATED B/U SCRAM SOLENOID | | CIRCUIT MUST MEET EQ REQUIREMENTS. | | | | THE COMMERCIAL SOLENOID VALVES ARE DEDICATABLE AND QUALIFIABLE TO THE | | ACCIDENT ENVIRONMENT IN WHICH THE ASSOCIATED CIRCUIT MUST FUNCTION. | | DEDICATION & QUALIFICATION PACKAGES ARE BEING PURSUED. | | | | THE LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28576 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: PERRY REGION: 3 |NOTIFICATION DATE: 03/23/95 | |UNIT: [1] [ ] [ ] STATE: OH |NOTIFICATION TIME: 17:51 [ET]| |RX TYPE: [1] GE-6 |EVENT DATE: 03/23/95 | +------------------------------------------------+EVENT TIME: 16:00[EST]| |NRC NOTIFIED BY: RODGER STIFFLER |LAST UPDATE DATE: 03/23/95 | |HQ OPS OFFICER: DOUG WEAVER +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |WAYNE KROPP 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 | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | N Y 100 POWER OPERATION | 100 POWER OPERATION | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | RHR SNUBBERS WERE FOUND INOPERABLE | | | | ON 6/20/94, THE B & C RHR LOOPS SNUBBERS WERE FOUND WITHOUT POOL SWELL | | SHIELDS INSTALLED. THE PLANT WAS IN MODE 5 AT THE TIME OF THE DISCOVERY | | AND THE RHR LOOPS WERE DETERMINED TO BE OPERABLE FOR MODE 5. | | | | THE SNUBBERS HAD BEEN INOPERABLE IN MODES 1 & 2 SINCE INITIAL PLANT START | | UP. ADDITIONALLY, THE B & C LOOPS OF RHR WERE INOPERABLE FROM THE INITIAL | | PLANT START UP UNTIL THE PLANT ENTERED MODE 3 AT THE BEGINNING OF REFUELING | | OUTAGE #4. | | | | EACH TIME RHR LOOP A WAS MADE INOPERABLE DURING THIS PERIOD OF TIME, A | | COMPLETE LOSS OF SAFETY FUNCTION (LOW PRESSURE ECCS) OCCURRED. THE LOSS OF | | SAFETY FUNCTION IS THE BASIS OF THIS REPORT. THESE SNUBBERS WERE FITTED | | WITH POOL SWELL SHIELDS PRIOR TO STARTUP AFTER REFUELING OUTAGE #4. THEY | | ARE NOW OPERABLE IN ALL MODES. | | | | THE LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28577 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: PEACH BOTTOM REGION: 1 |NOTIFICATION DATE: 03/23/95 | |UNIT: [ ] [3] [ ] STATE: PA |NOTIFICATION TIME: 17:59 [ET]| |RX TYPE: [2] GE-4,[3] GE-4 |EVENT DATE: 03/23/95 | +------------------------------------------------+EVENT TIME: 16:18[EST]| |NRC NOTIFIED BY: JIM KOVALCHICK |LAST UPDATE DATE: 03/23/95 | |HQ OPS OFFICER: DOUG WEAVER +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |CLIFFORD ANDERSON RDO | |ARPS 50.72(b)(2)(ii) RPS ACTUATION | | |AESF 50.72(b)(2)(ii) ESF ACTUATION | | |APRE 50.72(b)(2)(vi) OFFSITE NOTIFICATION | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | | | | | 3 | M/R Y 100 POWER OPERATION | 0 HOT SHUTDOWN | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | MANUAL REACTOR SCRAM BECAUSE OF LOWERING VACUUM | | | | UNIT 3 WAS MANUALLY SCRAMMED AT 1618. LOSS OF VACUUM IN THE MAIN CONDENSER | | BEGAN AT 1612 DUE TO THE LOSS OF A STEAM JET AIR EJECTOR. PLANT OPERATORS | | RESPONDED BY REDUCING REACTOR POWER. POWER WAS LOWERED WITH RECIRCULATION | | PUMPS AND THEN BY INSERTING CONTROL RODS. REACTOR POWER WAS AT 65% WHEN | | THE REACTOR WAS SCRAMMED. THE OPERATOR SCRAMMED THE REACTOR WHEN A HALF | | SCRAM WAS RECEIVED ON LOW CONDENSER VACUUM. | | | | ALL RODS FULLY INSERTED. REACTOR PRESSURE VESSEL LEVEL (RPV) DROPPED TO | | -30" AFTER THE SCRAM. THIS CAUSED GROUP 2 & 3 PRIMARY CONTAINMENT | | ISOLATIONS. LEVEL WAS RESTORED TO NORMAL WITH A REACTOR FEED PUMP. THE | | MAIN CONDENSER VACUUM IS BEING MAINTAINED WITH A MECHANICAL VACUUM PUMP AND | | THE MAIN CONDENSER IS AVAILABLE FOR DECAY HEAT REMOVAL. | | | | THE PLANT IS STABLE IN HOT SHUTDOWN. THE PRECISE NATURE OF THE AIR EJECTOR | | FAILURE IS UNDER INVESTIGATION. THE LICENSEE INFORMED THE NRC RESIDENT | | INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |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: 03/23/95 | |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. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28579 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: HOPE CREEK REGION: 1 |NOTIFICATION DATE: 03/23/95 | |UNIT: [1] [ ] [ ] STATE: NJ |NOTIFICATION TIME: 21:31 [ET]| |RX TYPE: [1] GE-4 |EVENT DATE: 03/23/95 | +------------------------------------------------+EVENT TIME: 18:22[EST]| |NRC NOTIFIED BY: JOHN DEDOMENICO |LAST UPDATE DATE: 03/23/95 | |HQ OPS OFFICER: DOUG WEAVER +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |CLIFFORD ANDERSON 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 N 0 REFUELING | 0 REFUELING | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | LOSS OF SHUTDOWN COOLING | | | | AN ESF ACTUATION AT 1822 RESULTED IN A LOSS OF SHUTDOWN COOLING WHEN THE | | SHUTDOWN COOLING SUCTION AND RETURN VALVES ISOLATED. THE B LOOP OF | | SHUTDOWN COOLING WAS IN SERVICE AT THE TIME OF THIS EVENT. THE OUTBOARD | | RECIRCULATION SAMPLE VALVE ALSO ISOLATED. | | | | THE ESF ACTUATION WAS CAUSED BY A LOSS OF POWER TO THE B RPS MG SET. THE | | POWER SUPPLY WAS LOST WHILE RESTORING FROM ELECTRICAL MAINTENANCE. THIS | | LOSS OF POWER CAUSED A LOSS OF POWER TO THE NSSSS ISOLATION SYSTEM AND IN | | TURN THE ESF ACTUATION. | | | | SHUTDOWN COOLING WAS RESTORED AT 1834 AFTER POWER TO THE RPS MG SET HAD | | BEEN RESTORED. REACTOR COOLANT TEMPERATURE ROSE FROM 120 F TO 140 F WHILE | | COOLING WAS ISOLATED. AFTER RESTORING COOLING, OPERATORS RETURNED | | TEMPERATURE TO AROUND 120 F. | | | | THE LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+