U.S. Nuclear Regulatory Commission Operations Center Event Reports For 09/01/94 - 09/02/94 ** EVENT NUMBERS ** 27440 27668 27738 27739 27740 27741 27742 !!!!!!!!! THIS EVENT HAS BEEN RETRACTED. THIS EVENT HAS BEEN RETRACTED !!!!!!! +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27440 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: OCONEE REGION: 2 |NOTIFICATION DATE: 06/23/94 | |UNIT: [1] [2] [3] STATE: SC |NOTIFICATION TIME: 12:01 [ET]| |RX TYPE: [1] B&W-L-LP,[2] B&W-L-LP,[3] B&W-L-LP |EVENT DATE: 06/23/94 | +------------------------------------------------+EVENT TIME: 11:05[EDT]| |NRC NOTIFIED BY: BENESOLE |LAST UPDATE DATE: 09/01/94 | |HQ OPS OFFICER: DICK JOLLIFFE +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |MILTON SHYMLOCK 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 | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | N N 0 HOT SHUTDOWN | 0 HOT SHUTDOWN | | 2 | N Y 100 POWER OPERATION | 100 POWER OPERATION | | 3 | N Y 100 POWER OPERATION | 100 POWER OPERATION | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | - THE ELECTRICAL POWER SYSTEM FOR OCONEE IS PRESENTLY VULNERABLE TO | | A SINGLE FAILURE DUE TO RELIANCE ON A NON-SAFETY RELATED SYSTEM - | | | | WHILE PERFORMING MAINTENANCE ACTIVITIES, LICENSEE DISCOVERED THAT IF THE | | AIR PRESSURE WHICH OPERATES THE AIR OPERATED CIRCUIT BREAKERS IN THE | | KEOWEE ELECTRICAL TIES TO THE OCONEE EMERGENCY POWER PATH (#ACB-1,2,3,4) | | BECOMES LOW, A RELAY WILL LOCK OUT THE KEOWEE MAIN TRANSFORMER FROM THE | | OCONEE OVERHEAD EMERGENCY POWER PATH. PORTIONS OF THE AIR SUPPLY TO THESE | | BREAKERS IS NON-SAFETY RELATED. | | | | AT 1515 ON 06/22/94, LICENSEE DECLARED THE OCONEE OVERHEAD EMERGENCY POWER | | PATH INOPERABLE AND ENTERED TECH SPEC LCO A/S 3.7.2.A.1 WHICH REQUIRES | | THE LICENSEE TO RESTORE THE OCONEE OVERHEAD EMERGENCY POWER PATH TO | | OPERABILITY STATUS WITHIN 72 HOURS OR TO SHUT ALL THREE UNITS DOWN. | | | | LICENSEE IS PERFORMING A TEMPORARY PLANT MODIFICATION TO DISABLE THIS | | PROTECTIVE FEATURE. | | | | AT 1105 ON 06/23/94, LICENSEE COMPLETED THE OPERABILITY EVALUATION | | INCLUDING THE 10CFR50.59 SAFETY EVALUATION AND DETERMINED THAT THIS EVENT | | IS REPORTABLE TO THE NRC. | | | | LICENSEE WILL SUBMIT AN LER OF THIS EVENT TO THE NRC. | | | | LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. | | | | * * * UPDATE 9/1/94 @ 0850 FROM BAILEY TAKEN BY SEBROSKY * * * | | THE LICENSEE IS RETRACTING THE EVENT. THE BASIS FOR THE RETRACTION IS | | CONTAINED IN A FACSIMILE FROM THE LICENSEE AND IS AS FOLLOWS: "AFTER | | REVIEWING THE OPERABILITY DETERMINATION, OCONEE NUCLEAR STATION HAS | | DETERMINED THAT THE ORIGINAL DESIGN RELIED ON THE AIR SYSTEM TO FUNCTION TO | | MITIGATE AN ACCIDENT. ALSO, THE AIR SYSTEM WAS EVALUATED AND DETERMINED TO | | BE ABLE TO FUNCTION DURING A SEISMIC EVENT. THIS HAS RESULTED IN A REVISION | | OF THE OPERABILITY DETERMINATION. THE EMERGENCY POWER SYSTEM WAS DECLARED | | OPERABLE FOR BOTH PAST AND PRESENT CONDITIONS." END OF TEXT. | | | | THE LICENSEE HAS INFORMED THE RESIDENT INSPECTOR. HOO NOTIFIED | | R2DO(COLLINS). | +------------------------------------------------------------------------------+ !!!!!!!!! THIS EVENT HAS BEEN RETRACTED. THIS EVENT HAS BEEN RETRACTED !!!!!!! +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27668 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: FERMI REGION: 3 |NOTIFICATION DATE: 08/13/94 | |UNIT: [2] [ ] [ ] STATE: MI |NOTIFICATION TIME: 17:51 [ET]| |RX TYPE: [2] GE-4 |EVENT DATE: 08/13/94 | +------------------------------------------------+EVENT TIME: 14:27[EDT]| |NRC NOTIFIED BY: GORDON NADER |LAST UPDATE DATE: 09/01/94 | |HQ OPS OFFICER: DOUG WEAVER +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |MARK RING 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 +------------------------------------------------------------------------------+ | LPCI LOOP SELECT WAS INADVERTENTLY ACTUATED DURING TROUBLE SHOOTING. | | | | DURING TROUBLE SHOOTING ACTIVITIES IN THE DIVISION II RHR RELAY CABINETS, | | AN INADVERTENT ACTUATION OF LPCI LOOP SELECT OCCURRED, LOOP B WAS SELECTED. | | BECAUSE THE REACTOR IS DEFUELED WITH THE FUEL POOL GATES REMOVED (NO MODE | | PER TECH SPECS) THE RHR SYSTEM IS NOT REQUIRED TO BE OPERABLE AND BOTH | | DIVISIONS OF RHR PUMPS WERE IN OFF/RESET. BASED ON THE INITIAL | | INVESTIGATION THE CORRECT VALVE RE-ALIGNMENT AND INDICATIONS OCCURRED. | | TROUBLE SHOOTING ACTIVITIES WERE STOPPED. THE LOGIC WAS RESET AND THE | | VALVES WERE REPOSITIONED TO THEIR STANDBY LINE UP. INVESTIGATION CONTINUES | | TO DETERMINE THE EXACT CAUSE OF THIS EVENT. | | | | THE LICENSEE WILL INFORM THE NRC RESIDENT INSPECTOR. | | | | * * * UPDATE 09/01/94 1309EDT FROM:HOSKINS BY:SCARFO * * * | | THE LICENSEE IS RETRACTING THIS EVENT ON THE BASIS THAT IT IS NOT | | REPORTABLE DUE TO THE INVALID NATURE OF THE INITIATING SIGNAL. THE CAUSE | | OF THIS EVENT IS ATTRIBUTED TO A TECHNICIAN ERROR RESULTING IN A TEST | | VOLTAGE BEING APPLIED TO THE WRONG RELAY. THE CLOSING OF THE RELAY | | RESULTED IN THE ACTUATION. THE LPCI SYSTEM WAS PROPERLY REMOVED FROM | | SERVICE AT THE TIME OF THIS EVENT. THE LICENSEE INFORMED THE NRC RESIDENT | | INSPECTOR. R3DO(KROPP) NOTIFIED. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27738 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: INDIAN POINT REGION: 1 |NOTIFICATION DATE: 09/01/94 | |UNIT: [2] [ ] [ ] STATE: NY |NOTIFICATION TIME: 09:52 [ET]| |RX TYPE: [2] W-4-LP,[3] W-4-LP |EVENT DATE: 09/01/94 | +------------------------------------------------+EVENT TIME: 09:30[EDT]| |NRC NOTIFIED BY: DEIRDRE MURPHY |LAST UPDATE DATE: 09/01/94 | |HQ OPS OFFICER: STEVE SANDIN +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |FRANK COSTELLO 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 90 POWER OPERATION | 90 POWER OPERATION | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | FAA AIRCRAFT LIGHTING ON STACK TAKEN OUT OF SERVICE FOR TROUBLESHOOTING. | | | | IN ORDER TO TROUBLESHOOT A PROBLEM WITH THE STACK LIGHTING, BOTH LIGHTS IN | | THE SOUTH QUADRANT ARE GOING TO BE TAKEN OUT OF SERVICE UNTIL ABOUT | | 1530EDT. THE LIGHTS IN THE OTHER THREE QUADRANTS REMAIN OPERABLE. THE | | LICENSEE WILL INFORM THE FAA AND THE NRC RESIDENT INSPECTOR. | | | | * * * UPDATE 09/01/94 1417EDT FROM:MURPHY FROM:SCARFO * * * | | THE STACK LIGHTING WAS RETURNED TO SERVICE AFTER A LOOSE CONNECTION FROM | | THE EMERGENCY POWER SUPPLY WAS REPAIRED. THE LICENSEE WILL INFORM THE NRC | | RESIDENT INSPECTOR. STATE AND LOCAL AGENCIES HAVE BEEN NOTIFIED. | | R1DO(COSTELLO) NOTIFIED. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27739 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: MILLSTONE REGION: 1 |NOTIFICATION DATE: 09/01/94 | |UNIT: [ ] [2] [ ] STATE: CT |NOTIFICATION TIME: 14:10 [ET]| |RX TYPE: [1] GE-3,[2] CE,[3] W-4-LP |EVENT DATE: 09/01/94 | +------------------------------------------------+EVENT TIME: 14:00[EDT]| |NRC NOTIFIED BY: NELSON |LAST UPDATE DATE: 09/01/94 | |HQ OPS OFFICER: GREG SCARFO +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |FRANK COSTELLO 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 HOT STANDBY | 0 HOT STANDBY | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | A PARTIAL CONTAINMENT ISOLATION OCCURRED WHEN ELECTRICAL NOISE FROM A | | SWITCH TRIPPED THE STEAM GENERATOR (SG) BLOWDOWN (B/D) RADIATION MONITOR. | | | | TWO SG B/D ISOLATION VALVES CLOSED AFTER AN OPERATOR TURNED THE SG B/D | | ISOLATION SWITCH FROM THE "BYPASS" POSITION TO THE "ON" POSITION. IT IS | | BELIEVED THAT ELECTRICAL NOISE GENERATED BY THE SWITCH AND THE CONTACTS | | TRIPPED THE SG B/D RADIATION MONITOR, RESULTING IN THE PARTIAL CONTAINMENT | | ISOLATION. OPERATORS SUBSEQUENTLY RESTORED THE SG B/D SYSTEM TO ITS NORMAL | | CONFIGURATION AND RESET THE ISOLATION LOGIC. CORRECTIVE ACTIONS ARE UNDER | | INVESTIGATION. THE LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. STATE | | AND LOCAL AGENCIES HAVE BEEN NOTIFIED. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27740 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: WOLF CREEK REGION: 4 |NOTIFICATION DATE: 09/01/94 | |UNIT: [1] [ ] [ ] STATE: KS |NOTIFICATION TIME: 15:58 [ET]| |RX TYPE: [1] W-4-LP |EVENT DATE: 09/01/94 | +------------------------------------------------+EVENT TIME: 14:15[CDT]| |NRC NOTIFIED BY: JOHNSON |LAST UPDATE DATE: 09/01/94 | |HQ OPS OFFICER: GREG SCARFO +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |BLAINE MURRAY RDO | |DDDD 73.71 UNSPECIFIED PARAGRAPH | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | N Y 93 POWER OPERATION | 93 POWER OPERATION | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | DISCOVERY OF CRIMINAL ACT INVOLVING INDIVIDUAL GRANTED ACCESS. IMMEDIATE | | COMPENSATORY MEASURES TAKEN ON DISCOVERY. THE LICENSEE INFORMED THE NRC | | RESIDENT INSPECTOR. SEE HOO LOG FOR DETAILS. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27741 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: BEAVER VALLEY REGION: 1 |NOTIFICATION DATE: 09/01/94 | |UNIT: [1] [2] [ ] STATE: PA |NOTIFICATION TIME: 14:54 [ET]| |RX TYPE: [1] W-3-LP,[2] W-3-LP |EVENT DATE: 09/01/94 | +------------------------------------------------+EVENT TIME: 12:00[EDT]| |NRC NOTIFIED BY: FREELAND |LAST UPDATE DATE: 09/01/94 | |HQ OPS OFFICER: GREG SCARFO +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: | | |CCCC 21.21 UNSPECIFIED PARAGRAPH | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |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 +------------------------------------------------------------------------------+ | A FAULT WAS DISCOVERED IN THE SOLID-STATE PROTECTION SYSTEM (SSPS) TESTER. | | | | THE SOLID-STATE PROTECTION SYSTEM (SSPS) SEMI-AUTOMATIC (S/A) TESTER | | /CLOCK-COUNTER CARD WAS FOUND TO BE DEFECTIVE WHILE TESTING TRAIN "B" OF | | THE SOLID STATE PROTECTION SYSTEM. CHANNEL "A" OF THE SSPS S/A TESTER DID | | NOT TEST ALL LOGIC COMBINATIONS IN THE UNIVERSAL LOGIC CARD OF THE SSPS. | | THIS COULD RESULT IN A FAILURE IN THE UNIVERSAL LOGIC CARD NOT BEING | | DETECTED BY THE TESTER. THE SSPS TESTER IS SUPPLIED BY WESTINGHOUSE | | ELECTRIC CORPORATION | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27742 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: DIABLO CANYON REGION: 4 |NOTIFICATION DATE: 09/01/94 | |UNIT: [1] [2] [ ] STATE: CA |NOTIFICATION TIME: 21:47 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 09/01/94 | +------------------------------------------------+EVENT TIME: 17:30[PDT]| |NRC NOTIFIED BY: PATTY |LAST UPDATE DATE: 09/01/94 | |HQ OPS OFFICER: GREG SCARFO +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |BLAINE MURRAY 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 | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | N Y 100 POWER OPERATION | 100 POWER OPERATION | | 2 | N Y 100 POWER OPERATION | 100 POWER OPERATION | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | REDUNDANT OVERCURRENT PROTECTION WAS DISCOVERED MISSING ON CIRCUITS | | ASSOCIATED WITH TWO ELECTRICAL PENETRATIONS SINCE THE BEGINNING OF PLANT | | OPERATIONS. | | | | A DESIGN REVIEW DETERMINED THAT TWO CIRCUITS THAT SUPPLY POWER TO THE | | INCORE PROBE DRIVE DEHUMIDIFIERS THROUGH ELECTRICAL PENETRATIONS "35E" AND | | "36E" DO NOT HAVE REDUNDANT OVERCURRENT PROTECTION (CURRENT LIMITING | | DEVICES OR ELECTRICAL FILTERS) AS REQUIRED BY A PREVIOUS PLANT | | MODIFICATION. THE ORIGINAL PLANT DESIGN DID NOT INCLUDE SUCH REDUNDANT | | OVERCURRENT PROTECTION AND IT IS BELIEVED THAT NONE HAS EXISTED ON THESE | | CIRCUITS SINCE THE BEGINNING OF PLANT OPERATIONS. THIS SITUATION COULD | | RESULT IN A CHALLENGE TO CONTAINMENT INTEGRITY. | | | | THE SHORT TERM CORRECTIVE ACTION IS TO DE-ENERGIZE THE CIRCUITS BY OPENING | | THE ASSOCIATED CIRCUIT BREAKERS. THIS DISABLES THE HUMIDIFIERS, HOWEVER, | | AND MAY AFFECT THE OPERABILITY OF THE INCORE PROBE DRIVES (USED DURING FLUX | | MAPPING). LONG TERM CORRECTIVE ACTIONS ARE UNDER INVESTIGATION. THE | | LICENSEE WILL INFORM THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+