U.S. Nuclear Regulatory Commission Operations Center Event Reports For 06/24/98 - 06/25/98 ** EVENT NUMBERS ** 33901 34433 34434 34435 !!!!!!!!! THIS EVENT HAS BEEN RETRACTED. THIS EVENT HAS BEEN RETRACTED !!!!!!! +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 33901 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: BIG ROCK POINT REGION: 3 |NOTIFICATION DATE: 03/15/98 | |UNIT: [1] [ ] [ ] STATE: MI |NOTIFICATION TIME: 07:00 [ET]| |RX TYPE: [1] GE-1 |EVENT DATE: 03/15/98 | +------------------------------------------------+EVENT TIME: 06:20[EST]| |NRC NOTIFIED BY: JOE HORON |LAST UPDATE DATE: 06/24/98 | |HQ OPS OFFICER: STEVE SANDIN +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: UNUSUAL EVENT +-----------------------------+ |10 CFR SECTION: |GARY SHEAR RDO | |AAEC 50.72(a)(1)(i) EMERGENCY DECLARED |LEDYARD (TAD) MARSH EO | | |STUART RUBIN IRD | | |BERNICE CARR FEMA | | |DOE, DOA, HHS, EPA FAX | | |DOT (NRC) FAX | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | N N 0 DECOMMISSIONED | 0 DECOMMISSIONED | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | EMERGENCY DECLARED DUE TO RADIOACTIVE LIQUID EFFLUENT RELEASE EXCEEDING 2X | | MAXIMUM PERMISSIBLE CONCENTRATION (MPC). | | | | AT APPROXIMATELY 0200EST A RADIATION EFFLUENT DETECTOR (SCINTILLATION | | COUNTER - NaI) MONITORING THE DISCHARGE CANAL SPIKED AND ALARMED HIGH | | (SETPOINT 650 CPM, NORMAL BACKGROUND 450 CPM). IMMEDIATE GRAB SAMPLES WERE | | TAKEN WHICH CONFIRMED AT 0220EST THAT THE ALARM WAS VALID. PLANT PERSONNEL | | RESPONDED BY ISOLATING THE RADWASTE SYSTEM AND REMOVING ONE OF THE TWO | | OPERATING ENCLOSURE COOLING WATER SYSTEMS FROM SERVICE. ADDITIONAL SAMPLES | | WERE TAKEN WHICH VERIFIED THAT THE RELEASE WAS TERMINATED IN LESS THAN 1 | | HOUR. CHEMISTRY DEPARTMENT PERSONNEL PERFORMED A DETAILED ISOTOPIC | | ANALYSIS AND CALCULATED THAT THE RELEASE INVOLVED TWO ISOTOPES; Co-60 | | (8.6E-6ęCi/ml) AND Mn-54 (4.86E-6ęCi/ml). THIS ACTIVITY REPRESENTS A | | COMBINED 3.03 MPC RELEASE; i.e., 2.87 MPC Co-60 (1 MPC=3E-6ęCi/ml) AND 0.16 | | MPC Mn-54 (1 MPC=3E-5ęCi/ml). AT 0620EST THE LICENSEE DECLARED AND | | TERMINATED AN UNUSUAL EVENT BASED ON THE EFFLUENT RADIOACTIVE LIQUID | | RELEASE EXCEEDING 2X MPC. THE LICENSEE IS CONTINUING THEIR INVESTIGATION | | TO DETERMINE THE SOURCE OF THE RELEASE AND HAS INCREASED THE SAMPLING | | FREQUENCY OF THE DISCHARGE CANAL FROM DAILY TO EVERY 2 HOURS. | | | | THE LICENSEE INFORMED STATE/LOCAL AGENCIES AND THE NRC RESIDENT INSPECTOR. | | | | * * * UPDATE 0805EST 3/15/98 FROM HORON TO S.SANDIN * * * | | | | THE LICENSEE COMPLETED SAMPLING AND ANALYSIS OF THE SERVICE WATER INLET AND | | CONCLUDED THAT THE SOURCE OF THE ACTIVITY WAS FROM SEDIMENTS IN LAKE | | MICHIGAN CONTAINING RADIOACTIVE MATERIAL FROM PREVIOUS DISCHARGES. THE | | LICENSEE IS REVIEWING THEIR EMERGENCY PLAN REQUIREMENTS TO DETERMINE AN | | APPROPRIATE METHOD OF IDENTIFYING CURRENT RADIOACTIVE RELEASES. THE | | LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. NOTIFIED R3DO(SHEAR), | | EO(MARSH) AND IRD(RUBIN). | | | | *** UPDATE ON 6/23/98 @ 0835 BY BOURASSA TO GOULD *** | | | | THE LICENSEE IS RETRACTING THIS EVENT DUE TO THE DISCOVERY OF A TERMINOLOGY | | DISCREPANCY BETWEEN A COMPUTER PRINTOUT AND EMERGENCY PLAN PROCEDURES WHICH | | CAUSED THE FACILITY TO ENTER AN NOUE. THIS DISCREPANCY HAS BEEN CORRECTED. | | | | THE RESIDENT INSPECTOR WAS NOTIFIED. | | | | THE REG 3 RDO(JORDAN) WAS NOTIFIED. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 34433 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: CATAWBA REGION: 2 |NOTIFICATION DATE: 06/24/98 | |UNIT: [1] [2] [ ] STATE: SC |NOTIFICATION TIME: 15:35 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 06/24/98 | +------------------------------------------------+EVENT TIME: 13:30[EDT]| |NRC NOTIFIED BY: JACK VRISSON |LAST UPDATE DATE: 06/24/98 | |HQ OPS OFFICER: JOHN MacKINNON +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |CHARLES OGLE 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 | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | N Y 100 POWER OPERATION | 100 POWER OPERATION | | 2 | N Y 100 POWER OPERATION | 100 POWER OPERATION | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | INOPERABLE CONTROL ROOM AREA VENTILATION SYSTEM | | | | ON JUNE 22, 1998, CONTROL ROOM AREA VENTILATION SYSTEM TRAIN "B" WAS | | INOPERABLE AS PART OF PRE-PLANNED MAINTENANCE ACTIVITY. AT APPROXIMATELY | | 2300 HOURS, AN OIL LEAK WAS FOUND ON AN INSTRUMENTATION LINE ON THE "A" | | TRAIN CONTROL ROOM AREA VENTILATION SYSTEM CHILLER. THE LEAK WAS ON THE | | DISCHARGE OIL PRESSURE SENSING LINE. THIS LINE IS AN OIL FILLED COPPER | | TUBE AND IS USED TO SENSE DISCHARGE OIL PRESSURE AS AN INPUT TO THE OIL | | REGULATION AND CONTROL INSTRUMENTATION (OIL PRESSURE AND OIL PRESSURE | | SAFETY SWITCH). THE LINE IS STATIC AND DOES NOT NORMALLY HAVE OIL FLOWING | | THROUGH IT. INITIALLY, IT WAS DETERMINED THAT THE LEAK WAS NOT LARGE | | ENOUGH TO CAUSE INOPERABILITY OF THE SYSTEM BECAUSE THE OIL LEVEL COULD BE | | PERIODICALLY MONITORED AND THE SUPPLY COULD BE PERIODICALLY REPLENISHED. ON | | JUNE 23, A TEMPORARY PATCH WAS INSTALLED WHICH HAS STOPPED THE LEAKAGE. | | | | UPON FURTHER REVIEW IT WAS DETERMINED THAT THE AREA WOULD BE INACCESSIBLE | | DURING POST LOCA CONDITIONS, PREVENTING REPLENISHMENT OF THE OIL SUPPLY. | | BECAUSE THIS SYSTEM IS REQUIRED TO FUNCTION POST-LOCA, THIS CONDITION | | RENDERED THE TRAIN INOPERABLE. THE TRAIN WAS INOPERABLE BETWEEN THE TIME | | THE LEAK OCCURRED UNTIL INSTALLATION OF THE PATCH. THIS CONDITION WAS | | DETERMINED TO BE A SINGLE CAUSE OR CONDITION THAT ALONE COULD HAVE | | PREVENTED THE FULFILLMENT OF THE SAFETY FUNCTION OF STRUCTURES THAT ARE | | NEEDED TO MITIGATE THE CONSEQUENCES OF AN ACCIDENT. | | | | | | THE NRC RESIDENT INSPECTOR WAS NOTIFIED OF THIS EVENT BY THE LICENSEE. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 34434 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: CLINTON REGION: 3 |NOTIFICATION DATE: 06/24/98 | |UNIT: [1] [ ] [ ] STATE: IL |NOTIFICATION TIME: 17:44 [ET]| |RX TYPE: [1] GE-6 |EVENT DATE: 06/24/98 | +------------------------------------------------+EVENT TIME: 14:30[CDT]| |NRC NOTIFIED BY: RICH CHEAR |LAST UPDATE DATE: 06/24/98 | |HQ OPS OFFICER: JOHN MacKINNON +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |MIKE JORDAN 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 COLD SHUTDOWN | 0 COLD SHUTDOWN | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | THE FIVE YEAR DESIGN LIFE OF PORTIONS OF THE MAIN STEAM DRAIN LINES HAS | | BEEN EXCEEDED. | | | | PORTIONS OF THE MAIN STEAM (MS) DRAIN LINES (PIPING SUBSYSTEM 1MS-38A) ARE | | DESIGNED PER USAR 3.9.1.1.13 (BALANCE-OF-PLANT [BOP] SYSTEM AND COMPONENT | | DESIGN TRANSIENTS) FOR A DESIGN LIFE OF FIVE YEARS. THE PORTIONS OF THIS | | PIPING SUBSYSTEM HAVE A FIVE YEAR DESIGN LIFE DUE TO THE WELDING OF THE | | STAINLESS STEEL VALVES TO THE CARBON STEEL PIPES. THESE PORTIONS HAVE BEEN | | IN SERVICE LONGER THAN THEIR DESIGN LIFE. THEREFORE, THE PORTIONS OF PIPING | | SUBSYSTEM 1MS-38A THAT CONSIST OF STAINLESS STEEL VALVES AND CARBON STEEL | | PIPES ARE CURRENTLY OUTSIDE THE DESIGN AND LICENSING BASIS. THESE DRAIN | | LINES ARE LOCATED ON ALL FOUR MAIN STEAM LINES. ENGINEERING IS STILL | | EVALUATING WHAT CORRECTIVE ACTIONS HAVE TO BE TAKEN. | | | | THE NRC RESIDENT INSPECTOR WAS NOTIFIED OF THIS EVENT BY THE LICENSEE. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 34435 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: DAVIS BESSE REGION: 3 |NOTIFICATION DATE: 06/24/98 | |UNIT: [1] [ ] [ ] STATE: OH |NOTIFICATION TIME: 21:37 [ET]| |RX TYPE: [1] B&W-R-LP |EVENT DATE: 06/24/98 | +------------------------------------------------+EVENT TIME: 21:18[EDT]| |NRC NOTIFIED BY: MCGEE |LAST UPDATE DATE: 06/24/98 | |HQ OPS OFFICER: JOHN MacKINNON +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: ALERT +-----------------------------+ |10 CFR SECTION: |MIKE JORDAN RDO | |AAEC 50.72(a)(1)(i) EMERGENCY DECLARED |TAD MARSH EO | | |STUART RUBIN IRD | | |TIM MARTIN AEOD | | |PAPERIELLO RA | | |JANET QUISSELL RCT | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | A/R Y 99 POWER OPERATION | 0 HOT STANDBY | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | TURBINE TRIP/REACTOR CAUSED BY LOSS OF OFFSITE POWER. | | | | LIGHTNING STRIKES WERE SEEN IN THE SWITCHYARD. THE LICENSEE STARTED BOTH | | EMERGENCY DIESEL GENERATORS. AT 2047EDT A TURBINE TRIP/REACTOR TRIP | | OCCURRED DUE TO LOSS OF OFFSITE POWER. A TORNADO ONSITE DAMAGED THE | | ELECTRICAL SWITCHYARD, COOLING TOWER AND THE TURBINE BUILDING. THE | | LICENSEE DECLARED AN ALERT AT 2118EDT. THE PLANT IS ON NATURAL CIRCULATION | | WITH AUXILIARY FEEDWATER SUPPLYING EMERGENCY FEEDWATER TO THE OTSGs (ONCE | | THROUGH STEAM GENERATORS). THE NRC ENTERED STANDBY AT 2201EDT. | | | | * * * UPDATE 0001EDT 6/25/98 * * * | | | | COMMISSIONER'S ASSISTANTS BRIEFING HELD. SEE HOO LOG FOR PARTICIPANTS. | | | | * * * UPDATE 0211EDT 6/25/98 * * * | | | | THE NRC DOWNGRADED THE AGENCY RESPONSE TO THE MONITORING PHASE OF NORMAL | | MODE. | +------------------------------------------------------------------------------+