U.S. Nuclear Regulatory Commission Operations Center Event Reports For 04/11/94 - 04/12/94 ** EVENT NUMBERS ** 27071 27072 27073 27074 27075 27076 27077 27078 +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27071 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: DRESDEN REGION: 3 |NOTIFICATION DATE: 04/11/94 | |UNIT: [ ] [ ] [3] STATE: IL |NOTIFICATION TIME: 11:46 [ET]| |RX TYPE: [1] GE-1,[2] GE-3,[3] GE-3 |EVENT DATE: 04/11/94 | +------------------------------------------------+EVENT TIME: 08:15[CDT]| |NRC NOTIFIED BY: VERCELLI |LAST UPDATE DATE: 04/11/94 | |HQ OPS OFFICER: STEVE SANDIN +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |ROY CANIANO RDO | |AIND 50.72(b)(2)(iii)(D) ACCIDENT MITIGATION | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | | | | | | | | | 3 | N N 0 REFUELING | 0 REFUELING | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | LICENSEE DISCOVERED THAT THE DEGRADED VOLTAGE RELAYS' TRIP SETTINGS FOR | | VITAL BUS "34-1" WERE LESS THAN THE FSAR SPECIFIED SETPOINT OF 110.4V. | | | | "WHILE PERFORMING AS FOUND SETTINGS FOR SECOND LEVEL DEGRADED VOLTAGE | | RELAYS ON EMERGENCY BUS "34-1", THE TRIP SETTINGS WERE FOUND TO BE LOWER | | THAN THE REQUIRED SETTING AS SPECIFIED IN THE FSAR. RELAYS WERE REPLACED | | AND ARE NOW WITHIN THE REQUIRED SPECIFICATION." | | | | DURING PERFORMANCE OF ANNUAL SURVEILLANCE "DOS 6600-9" (TESTING OF ECCS | | UNDERVOLTAGE AND DEGRADED VOLTAGE), BOTH ABB RELAYS MODEL #1TE-27N TESTED | | AT 109.46V AND 109.43V, RESPECTIVELY, WHICH IS LESS THAN THE FSAR SETPOINT. | | THIS WOULD RESULT IN TWO LPCI AND ONE CORE SPRAY PUMP FAILING IF OPERATION | | WAS REQUIRED IN A DEGRADED VOLTAGE CONDITION LESS THAN THE FSAR SETPOINT | | BUT GREATER THAN THE AS FOUND TRIP SETTINGS. THE LICENSEE HAS REPLACED THE | | RELAYS ASSOCIATED WITH VITAL BUS "34-1" AND WILL PERFORM TESTING FOR VITAL | | BUS "33-1" NEXT WEEK. THE LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27072 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: SALEM REGION: 1 |NOTIFICATION DATE: 04/11/94 | |UNIT: [ ] [2] [ ] STATE: NJ |NOTIFICATION TIME: 12:10 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 04/11/94 | +------------------------------------------------+EVENT TIME: 10:35[EDT]| |NRC NOTIFIED BY: MIKE GWIRTZ |LAST UPDATE DATE: 04/11/94 | |HQ OPS OFFICER: RUDY KARSCH +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |WILLIAM LAZARUS 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 Y 48 POWER OPERATION | 31 POWER OPERATION | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | ESF ACTUATION, EMERGENCY DIESEL GENERATOR (EDG) START AND INITIATION OF | | BLACKOUT LOADING SEQUENCE, DUE TO HUMAN ERROR. | | | | DURING PERFORMANCE OF VITAL BUS UNDERVOLTAGE TESTING A BLACKOUT SIGNAL WAS | | GENERATED DUE TO A MISPOSITIONED TEST SWITCH, WHICH CAUSED ALL THREE VITAL | | BUSES TO STRIP AND LOAD ON THE EDGs IN THE BLACKOUT MODE. ALL VITAL BUSES | | ARE PRESENTLY LOADED ONTO THE EDGs AND THE PLANT IS STABLE. THE LICENSEE | | IS ANALYZING THE HUMAN PERFORMANCE AND RECOVERY PLANS ARE IN PROGRESS. THE | | LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27073 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: SEABROOK REGION: 1 |NOTIFICATION DATE: 04/11/94 | |UNIT: [1] [ ] [ ] STATE: NH |NOTIFICATION TIME: 13:04 [ET]| |RX TYPE: [1] W-4-LP |EVENT DATE: 04/11/94 | +------------------------------------------------+EVENT TIME: 10:40[EDT]| |NRC NOTIFIED BY: GARY KILBY |LAST UPDATE DATE: 04/11/94 | |HQ OPS OFFICER: RUDY KARSCH +-----------------------------+ +------------------------------------------------+ 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 N 0 COLD SHUTDOWN | 0 COLD SHUTDOWN | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | PRESS RELEASE REGARDING INJURY ON SITE. | | | | THE LICENSEE ISSUED A PRESS RELEASE ABOUT WORKER INJURY THAT OCCURRED ON | | 4/10/94 AT 1435 EDT. NINE WORKERS WERE TREATED ON SITE FOR CUTS AND | | BRUISES AND TWO WERE TREATED AT EXITER HOSPITAL AND RELEASED WHEN | | PRESSURIZED AIR WAS RELEASED DURING OPENING OF THE CONTAINMENT AIR LOCK. | | THE CAUSE IS UNDER INVESTIGATION. THE LICENSEE INFORMED THE NRC RESIDENT | | INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27074 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: RIVER BEND REGION: 4 |NOTIFICATION DATE: 04/11/94 | |UNIT: [1] [ ] [ ] STATE: LA |NOTIFICATION TIME: 15:37 [ET]| |RX TYPE: [1] GE-6 |EVENT DATE: 04/11/94 | +------------------------------------------------+EVENT TIME: 12:47[CDT]| |NRC NOTIFIED BY: GARY HUSTON |LAST UPDATE DATE: 04/11/94 | |HQ OPS OFFICER: RUDY KARSCH +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |JOHN PELLET 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 97 POWER OPERATION | 97 POWER OPERATION | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | THE LICENSEE REPORTED TO THE LOUISIANA AND FEDERAL ENVIRONMENTAL PROTECTION | | AGENCIES THAT THEIR DISCHARGE OF OIL AND GREASE EXCEEDED PERMITTED LEVELS. | | | | THE MAXIMUM LIMIT FOR THE DISCHARGE OF OIL AND GREASE UNDER THE LICENSEE'S | | PERMIT IS 20 mG/mL. THE ACTUAL LEVEL DETERMINED BY A SAMPLE TAKEN ON | | 4/4/94 AT THE WASTE WATER TREATMENT AND LIQUID RAD WASTE OUT FALL WAS 24.55 | | mG/mL. NO FURTHER RELEASES WILL BE MADE UNTIL A PRE-RELEASE SAMPLE IS | | COMPLETED FOR EACH DISCHARGE. THE LICENSEE INFORMED THE NRC RESIDENT | | INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27075 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: DIABLO CANYON REGION: 4 |NOTIFICATION DATE: 04/11/94 | |UNIT: [1] [ ] [ ] STATE: CA |NOTIFICATION TIME: 19:36 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 04/11/94 | +------------------------------------------------+EVENT TIME: 13:32[PDT]| |NRC NOTIFIED BY: DAVID PETTY |LAST UPDATE DATE: 04/11/94 | |HQ OPS OFFICER: RUDY KARSCH +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |JOHN PELLET RDO | |AESF 50.72(b)(2)(ii) ESF ACTUATION | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | N N 0 REFUELING | 0 REFUELING | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | SENSED BUS UNDERVOLTAGE DUE TO A BLOWN POTENTIAL TRANSFORMER FUSE CAUSES | | THE START OF AN EMERGENCY DIESEL GENERATOR (EDG). | | | | EDG "1-3" STARTED ON A BUS "F" UNDERVOLTAGE INDICATION CAUSED BY A BLOWN | | POTENTIAL TRANSFORMER FUSE. THE CAUSE OF THE BLOWN FUSE IS UNDER | | INVESTIGATION BY THE LICENSEE. THE REACTOR CORE WAS PREVIOUSLY TRANSFERRED | | TO THE SPENT FUEL POOL, AND WILL NOT BE RELOADED UNTIL THE CAUSE OF THIS | | EVENT IS UNDERSTOOD. THE ONLY LOAD AT THE TIME WAS A 480 VOLT COMPONENT | | COOLING WATER (CCW) PUMP. THE PUMP DID NOT CYCLE BACK ONTO THE BUS | | AUTOMATICALLY DUE TO THE SENSED UNDERVOLTAGE. OTHER CCW PUMPS WERE | | OPERATING, AND REMOVING HEAT LOADS. THE PUMP HAS BEEN RESTARTED. THE EDG | | IS STILL RUNNING PENDING COMPLETION OF THE INVESTIGATION. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27076 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: NINE MILE POINT REGION: 1 |NOTIFICATION DATE: 04/11/94 | |UNIT: [1] [ ] [ ] STATE: NY |NOTIFICATION TIME: 20:17 [ET]| |RX TYPE: [1] GE-2,[2] GE-5 |EVENT DATE: 04/11/94 | +------------------------------------------------+EVENT TIME: 19:20[EDT]| |NRC NOTIFIED BY: DAVID MORR |LAST UPDATE DATE: 04/11/94 | |HQ OPS OFFICER: RUDY KARSCH +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |WILLIAM LAZARUS RDO | |ARPS 50.72(b)(2)(ii) RPS ACTUATION | | |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 STARTUP | 0 HOT SHUTDOWN | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | SCRAM, POSSIBLY DUE TO NOISE SPIKES, AND SUBSEQUENT ESF ACTUATION. | | | | A FULL SCRAM AND TURBINE TRIP OCCURRED, POSSIBLY DUE TO NOISE SPIKES ON THE | | IRMs. INVESTIGATIONS BY THE LICENSEE INTO THE CAUSE OF THE TRIP ARE IN | | PROGRESS. ALL CONTROL RODS FULLY INSERTED AND ALL SAFETY SYSTEMS PERFORMED | | AS EXPECTED. HIGH PRESSURE COOLANT INJECTION INITIATED, AS EXPECTED, ON | | THE TURBINE TRIP. THE LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27077 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: ARKANSAS NUCLEAR REGION: 4 |NOTIFICATION DATE: 04/11/94 | |UNIT: [1] [ ] [ ] STATE: AR |NOTIFICATION TIME: 22:04 [ET]| |RX TYPE: [1] B&W-L-LP,[2] CE |EVENT DATE: 04/11/94 | +------------------------------------------------+EVENT TIME: 20:41[CDT]| |NRC NOTIFIED BY: DAN STREBECK |LAST UPDATE DATE: 04/11/94 | |HQ OPS OFFICER: RUDY KARSCH +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: UNUSUAL EVENT +-----------------------------+ |10 CFR SECTION: |JOHN PELLET RDO | |AAEC 50.72(a)(1)(i) EMERGENCY DECLARED |JOHN ZWOLINSKI EO | |ARPS 50.72(b)(2)(ii) RPS ACTUATION |JOE LOUZONIS FEMA | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | A/R Y 100 POWER OPERATION | 0 HOT STANDBY | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | UNUSUAL EVENT DECLARED DUE TO ENTRY INTO EMERGENCY OPERATING PROCEDURES DUE | | TO EXCESSIVE POST TRIP COOLDOWN. | | | | A REACTOR TRIP OCCURRED FOR REASONS WHICH HAVE NOT YET BEEN DETERMINED. | | FOLLOWING THE REACTOR TRIP MAIN STEAM ISOLATION VALVES CLOSED ISOLATING | | BOTH OTSGs FOR REASONS WHICH HAVE NOT YET BEEN DETERMINED. WHILE COOLING | | DOWN THE OPERATORS ENCOUNTERED DIFFICULTIES WITH THE ATMOSPHERIC DUMP | | VALVES RESULTING IN OVER COOLING. THE INITIAL TEMPERATURE WAS 579 DEGREES. | | THE LOWEST TEMPERATURE REACHED WAS 522 DEGREES. AT THE TIME OF THE REPORT | | THE ATMOSPHERIC DUMP VALVES WERE CLOSED AND TEMPERATURE HAD RECOVERED TO | | 537 DEGREES. ALL CONTROL RODS INSERTED FULLY FOLLOWING THE TRIP. THE | | LICENSEE IS TRYING TO GAIN MANUAL CONTROL OF THE ATMOSPHERIC DUMP VALVES. | | THE NRC RESIDENT INSPECTOR IS IN THE UNIT 1 CONTROL ROOM OBSERVING THE | | EVENT. A CONFERENCE CALL ATTENDED BY NRR EO (ZWOLINSKI), R4DO (PELLET), R4 | | (BEECH & STETKA) TO DISCUSS THIS EVENT WAS HELD. | | | | * * * UPDATE AT 2355 EDT FROM CLINKINGBEARD TAKEN BY KARSCH * * * | | UNUSUAL EVENT TERMINATED AT 2255 CDT. THE PLANT HAS BEEN RESTORED TO | | NORMAL POST TRIP CONDITIONS. THE ENTRY CONDITIONS INTO THE EOPs NO LONGER | | EXIST. THE REACTOR WAS TRIPPED MANUALLY WHEN THE OPERATORS OBSERVED A | | FAILURE TO AN INSTRUMENT POWER SUPPLY WHICH INITIATED THE MSIV CLOSURE. | | HOO NOTIFIED R4D0 (PELLET) AND FEMA (EARL). | | ***UPDATE AT 0040 EDT ON 4/12/94 FROM STREBECK BY McGINTY*** | | THE LICENSEE CALLED AGAIN TO NOTIFY THE OPS CENTER OF THE UE TERMINATION. | | IT APPEARS THAT A LIGHTNING STRIKE, IN OR NEAR THE SWITCHYARD, WAS THE | | CAUSE OF THE INSTRUMENT PROBLEM AND THE MSIV CLOSURE (ON A SG PRESSURE | | <600# SIGNAL). THE LICENSEE NOTIFIED THE RESIDENT INSPECTOR, THE STATE, | | AND ANTICIPATES A PRESS RELEASE WILL BE ISSUED. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27078 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: CLINTON REGION: 3 |NOTIFICATION DATE: 04/12/94 | |UNIT: [1] [ ] [ ] STATE: IL |NOTIFICATION TIME: 04:55 [ET]| |RX TYPE: [1] GE-6 |EVENT DATE: 04/12/94 | +------------------------------------------------+EVENT TIME: 03:20[CDT]| |NRC NOTIFIED BY: NADEN |LAST UPDATE DATE: 04/12/94 | |HQ OPS OFFICER: TIM McGINTY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |ROY CANIANO 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 | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | FLOODING OF ROADS INHIBITS ACCESS TO THE SITE. | | | | AT 0320 CDT, IT WAS DETERMINED THAT DUE TO HEAVY RAINS AND FLOODING, ACCESS | | TO THE PLANT VIA ROADWAYS IS NOT POSSIBLE. THIS IS AN EVENT THAT COULD | | RESULT IN AFFECTING THE OFF-SITE RESPONSE CAPABILITY OF THE EMERGENCY | | RESPONSE ORGANIZATION. | | | | AT THIS TIME, ALL THE ROADS HAVE NOT BEEN CONFIRMED TO BE IMPASSABLE, BUT | | IT IS HIGHLY SUSPECT THAT THEY ARE. HIGHWAY 54 HAS BEEN CONFIRMED TO BE | | CLOSED, AND NOBODY HAD ACCESSED THE PLANT VIA STATE ROUTE 10 DURING THE | | NIGHT. THE PLANT IS OPERATING NORMALLY, AND THE LEVELS OF THE NORTH FORK | | OF SALT CREEK POSE NO THREAT TO THE PLANT AND SHUTDOWN SERVICE WATER | | SYSTEMS OR THE CIRC WATER SYSTEM. | | | | THE LICENSEE INFORMED THE RESIDENT INSPECTOR. THE LICENSEE WILL BE | | UPDATING THE OPERATIONS CENTER AT 0800 EDT AT SHIFT TURNOVER IF IT DOES NOT | | TAKE PLACE. THERE IS CURRENTLY ADEQUATE STAFFING AT THE SITE FOR | | CONTINUING OPERATIONS. | +------------------------------------------------------------------------------+