U.S. Nuclear Regulatory Commission Operations Center Event Reports For 09/07/94 - 09/08/94 ** EVENT NUMBERS ** 27752 27753 27754 27755 27756 +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27752 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: PRAIRIE ISLAND REGION: 3 |NOTIFICATION DATE: 09/07/94 | |UNIT: [1] [ ] [ ] STATE: MN |NOTIFICATION TIME: 10:15 [ET]| |RX TYPE: [1] W-2-LP,[2] W-2-LP |EVENT DATE: 09/06/94 | +------------------------------------------------+EVENT TIME: 20:59[CDT]| |NRC NOTIFIED BY: ANDERSON |LAST UPDATE DATE: 09/07/94 | |HQ OPS OFFICER: TIM McGINTY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |CYNTHIA PEDERSON 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 +------------------------------------------------------------------------------+ | CVCS LETDOWN ISOLATION VALVE CLOSED ON A BREAKER INTERLOCK WHEN THE | | OPERATING CHARGING PUMP TRIPPED ON MOTOR OVERLOAD. | | | | THE LETDOWN ISOLATION VALVE ON THE CVCS SYSTEM CLOSED WHEN THE OPERATING | | CHARGING PUMP (#12) TRIPPED ON OVERLOAD. THE LETDOWN ISOLATION VALVE IS | | INTERLOCKED WITH A CHARGING PUMP BREAKER "CLOSED" POSITION SIGNAL. PRAIRIE | | ISLAND HAS THREE CHARGING PUMPS (NORMALLY RUN ONE PUMP), AND A BACKUP | | CHARGING PUMP WAS STARTED AND LETDOWN WAS PROMPTLY RESTORED. THE CAUSE OF | | THE CHARGING PUMP TRIP IS UNDER INVESTIGATION. THE #12 CHARGING PUMP HAS | | BEEN DECLARED INOPERABLE, HOWEVER, THIS DOES NOT REQUIRE THE NEED TO ENTER | | A TECH SPEC LCO. THE CHARGING PUMP IS NOT CONSIDERED TO BE PART OF THE | | ECCS. | | | | THE LETDOWN ISOLATION VALVE IS CONSIDERED PART OF THE CONTAINMENT SYSTEM, | | AND THIS IS BEING REPORTED BECAUSE CONTAINMENT IS CONSIDERED TO BE AN | | ENGINEERED SAFETY FEATURE. THIS EVENT IS CONSIDERED TO BE A NON-ESF | | ACTUATION OF AN ESF COMPONENT. | | | | THE EVENT WAS NOT RECOGNIZED BY THE NIGHT SHIFT AS BEING REPORTABLE UNDER | | THE ESF ACTUATION CRITERIA. THE DECISION TO REPORT IT WAS MADE BY THE | | PLANT MANAGEMENT STAFF TODAY. THE CALLER MENTIONED THAT A SIMILAR EVENT | | (LESS THAN SIX MONTHS AGO) HAD OCCURRED PREVIOUSLY, AND WAS DETERMINED TO | | BE REPORTABLE AFTER DISCUSSIONS WITH THE RESIDENT INSPECTOR. THE PROCEDURES | | HAD NOT BEEN UPDATED YET TO REFLECT THE CHANGE IN PHILOSOPHY, BUT WILL | | PROBABLY BE CHANGED LATER TODAY. THE LICENSEE INFORMED THE RESIDENT | | INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27753 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: MONTICELLO REGION: 3 |NOTIFICATION DATE: 09/07/94 | |UNIT: [1] [ ] [ ] STATE: MN |NOTIFICATION TIME: 10:38 [ET]| |RX TYPE: [1] GE-3 |EVENT DATE: 09/07/94 | +------------------------------------------------+EVENT TIME: 08:28[CDT]| |NRC NOTIFIED BY: GERADS |LAST UPDATE DATE: 09/07/94 | |HQ OPS OFFICER: TIM McGINTY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |CYNTHIA PEDERSON 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 81 POWER OPERATION | 81 POWER OPERATION | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | BOTH DIESEL GENERATORS FAST STARTED DUE TO THE OPERATION OF THE INCORRECT | | RELAY DURING A SURVEILLANCE TEST PROCEDURE. THE PLANT ELECTRICAL BUSES | | REMAINED ENERGIZED VIA THE NORMAL SOURCE. | | | | MONTICELLO IS OPERATING AT 81%, COASTING DOWN TO A REFUELING OUTAGE. DURING | | THE PERFORMANCE OF A SURVEILLANCE TEST (SAFEGUARDS BUS VOLTAGE PROTECTION | | RELAY UNIT FUNCTIONAL TEST), OPERATION OF A TEST PUSHBUTTON ON AN INCORRECT | | RELAY RESULTED IN FAST STARTS OF BOTH DIESEL GENERATORS ON AN INVALID | | INSTANTANEOUS LOSS OF VOLTAGE SIGNAL. ALL PLANT ELECTRICAL BUSES REMAINED | | ENERGIZED VIA THE NORMAL AUXILIARY SOURCE AND THE DIESELS REMAINED OPERABLE | | THROUGHOUT THE EVENT. BUS UNDERVOLTAGE PROTECTION LOGIC FUNCTIONED PROPERLY | | FOR THE SIGNALS PROVIDED. | | | | THE EVENT IS ATTRIBUTED TO PERSONNEL ERROR. THE DIESELS WERE SUBSEQUENTLY | | SHUTDOWN. THE LICENSEE INFORMED THE RESIDENT INSPECTOR. | | | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |GENERAL INFORMATION or OTHER | |EVENT NUMBER: 27754 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |LICENSEE: C&D CHARTER POWER SYSTEMS |NOTIFICATION DATE: 09/07/94 | | CITY: PLYMOUTH MEETIN REGION: 1 |NOTIFICATION TIME: 10:21 [ET]| | COUNTY: STATE: PA |EVENT DATE: 09/07/94 | |LICENSE#: AGREEMENT: N |EVENT TIME: 00:00[EDT]| | DOCKET: |LAST UPDATE DATE: 09/07/94 | | +-----------------------------+ | |PERSON ORGANIZATION| | | | | | | +------------------------------------------------+ | |NRC NOTIFIED BY: KINDEN | | |HQ OPS OFFICER: GREG SCARFO | | +------------------------------------------------+ | |EMERGENCY CLASS: NOT APPLICABLE | | |10 CFR SECTION: | | |CCCC 21.21 UNSPECIFIED PARAGRAPH | | | | | | | | | | | | | | +------------------------------------------------+-----------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | A DEFECTIVE LATCHING MECHANISM IN PARTICULAR POTTER & BRUMFIELD RELAYS | | FOUND ON HIGH VOLTAGE SHUTDOWN ALARM ASSEMBLY CARDS WAS REPORTED BY C&D | | CHARTER POWER SYSTEMS OF PLYMOUTH MEETING, PENNSYLVANIA. | | | | MR. T.J. KINDEN OF C&D CHARTER POWER SYSTEMS OF PLYMOUTH MEETING, | | PENNSYLVANIA, REPORTED A DEFECTIVE LATCHING MECHANISM IN POTTER & BRUMFIELD | | RELAYS "R10-E3286-2" (C&D PART #JR-461-E) FOUND ON C&D HIGH VOLTAGE | | SHUTDOWN ALARM ASSEMBLY PRINTED CIRCUIT BOARDS "MBC-2920-E" IN C&D "ARR" | | BATTERY CHARGERS. THE DEFECT IS LIMITED TO TWO DATE CODE LOTS (9108, 9242) | | IDENTIFIED ON THE RELAY. THE FAILURE OF THE RELAY MAY CAUSE AN APPARENT | | HIGH VOLTAGE SHUTDOWN OF THE CHARGER TERMINATING THE CHARGING OF THE | | BATTERY SYSTEM UNTIL SUCH TIME AS THE RELAY IS RESET. THE BATTERY ITSELF | | WILL BE UNAFFECTED UNLESS THE SHUTDOWN CONDITION IS NOT CORRECTED FOR A | | SUFFICIENT PERIOD OF TIME FOR THE BATTERIES TO BECOME DISCHARGED. | | | | THE FOLLOWING PLANTS ARE AFFECTED: VOGTLE, HATCH, FARLEY, GRAND GULF, | | WATERFORD 3, BROWNS FERRY, VERMONT YANKEE, LIMERICK, COOPER, SAN ONOFRE, | | AND SALEM. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27755 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: PALISADES REGION: 3 |NOTIFICATION DATE: 09/07/94 | |UNIT: [1] [ ] [ ] STATE: MI |NOTIFICATION TIME: 19:20 [ET]| |RX TYPE: [1] CE |EVENT DATE: 09/07/94 | +------------------------------------------------+EVENT TIME: 18:43[EDT]| |NRC NOTIFIED BY: BERNIE BENSON |LAST UPDATE DATE: 09/07/94 | |HQ OPS OFFICER: RUDY KARSCH +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |CYNTHIA PEDERSON 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 Y 100 POWER OPERATION | 100 POWER OPERATION | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | EMERGENCY DIESEL GENERATOR (EDG) INOPERABLE DUE TO INABILITY TO MEET FULL | | LOAD REQUIREMENT. | | | | EDG "12" (ONE OF TWO) HAS BEEN INOPERABLE FOR AN EXTENDED PERIOD OF TIME | | (EXACT DURATION IS NOT KNOWN), DUE TO ITS INABILITY TO REACH THE FULL LOAD | | REQUIREMENT IN THE FSAR. THE UNIT IS REQUIRED TO PROVIDE 2678 KW, BUT CAN | | ONLY PROVIDE 2665 KW. THE ACCIDENT ANALYSIS REQUIRES 2678 KW IF THE OTHER | | EDG FAILS IN CONJUNCTION WITH A LOSS OF OFF-SITE POWER. EDG "11" ALSO HAD | | THIS PROBLEM, SEE EVENT # 27745. THE LICENSEE IS ATTEMPTING TO CORRECT THE | | PROBLEM BY ADJUSTING THE GOVERNOR LINKAGE, AS WAS DONE TO CORRECT THE | | PROBLEM ON EDG "11". TECH SPEC 3.7.2 SEVEN DAY LCO WILL EXPIRE ON 9/9/94. | | THE LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27756 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: BYRON REGION: 3 |NOTIFICATION DATE: 09/08/94 | |UNIT: [1] [ ] [ ] STATE: IL |NOTIFICATION TIME: 04:26 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 09/08/94 | +------------------------------------------------+EVENT TIME: 01:25[CDT]| |NRC NOTIFIED BY: ROBERT |LAST UPDATE DATE: 09/08/94 | |HQ OPS OFFICER: TIM McGINTY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |CYNTHIA PEDERSON 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 Y 10 POWER OPERATION | 0 HOT STANDBY | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | REACTOR TRIP ON HIGH SOURCE RANGE FLUX WHEN THE "N-31" SOURCE RANGE | | RE-ENERGIZED SOONER THAN EXPECTED. | | | | DURING A UNIT 1 SHUTDOWN FOR REFUELING, FOLLOWING A 508 DAY RUN, THE UNIT 1 | | REACTOR TRIPPED FROM 10% POWER ON NUCLEAR INSTRUMENTATION SOURCE RANGE HIGH | | FLUX TRIP. THE TURBINE GENERATOR WAS OFF-LINE AT THE TIME OF THE TRIP. THE | | SOURCE RANGE FLUX HIGH TRIP OCCURRED WHEN THE SOURCE RANGE "N-31" | | INADVERTENTLY RE-ENERGIZED WHEN THE "P-10" POWER RANGE PERMISSIVE RESET. | | THE SOURCE RANGE ENERGIZATION SHOULD HAVE BEEN BLOCKED BY THE SOLID STATE | | PROTECTION SYSTEM "P-6" PERMISSIVE. FOLLOWING THE REACTOR TRIP, A | | FEEDWATER ISOLATION WAS RECEIVED AS EXPECTED. ALL OTHER EQUIPMENT | | FUNCTIONED AS DESIGNED. THE MALFUNCTION OF THE "P-6" PERMISSIVE IS | | CURRENTLY BEING INVESTIGATED. | | | | ALL RODS FULLY INSERTED ON THE TRIP. THE RE-ALIGNMENT OF ELECTRICAL BUSES | | FOR THE SHUTDOWN HAD ALREADY BEEN COMPLETED, SO THERE WERE NO PROBLEMS WITH | | TRANSFERS OF ELECTRICAL BUSES. THE FEEDWATER ISOLATION WAS RESET, AND THE | | STEAM GENERATORS ARE BEING FED VIA START-UP FEEDWATER, WITH STEAM BEING | | BYPASSED TO THE MAIN CONDENSER. ALL ECCS's AND EDG's ARE CURRENTLY | | OPERABLE. | | | | THE "P-10" PERMISSIVE IS PROVIDED BY THE POWER RANGE NI's AT 10% POWER, | | ALLOWING THE SOURCE RANGE NI's TO RE-ENERGIZE (DECREASING) AND ALSO IS | | DESIGNED TO AUTOMATICALLY SECURE SOURCE RANGE NI's WHEN INCREASING ABOVE | | 10%. THE "P-6" PERMISSIVE PERFORMS THE ACTUAL AUTOMATIC RE-ENERGIZATION OF | | SOURCE RANGE NI's, WHICH IS DESIGNED TO OCCUR AT 5.0 EE-11 AMPS (LESS THAN | | 0% POWER). IN THIS INSTANCE, UPON DECREASING BELOW 10% ("P-10" | | PERMISSIVE), THE "P-6" PERMISSIVE DID NOT "WAIT" UNTIL POWER WAS FURTHER | | REDUCED PRIOR TO ACTUALLY ENERGIZING THE SOURCE RANGE NI's. THE SOURCE | | RANGE FLUX HIGH TRIP IS 1.0 EE+05 CPS. | | | | THE LICENSEE PULLED THE FUSES FOR THE "N-31" NI DRAWER WITHIN A COUPLE OF | | MINUTES OF THE EVENT. WHEN THE NORMAL "P-6" PERMISSIVE SETPOINT PERMISSIVE | | WAS REACHED, THEY RE-INSTALLED THE FUSES. THUS, THE "N-31" SOURCE RANGE NI | | WAS INOPERABLE FOR ABOUT 10 MINUTES, HOWEVER THEY ARE BOTH NOW FUNCTIONING | | PROPERLY. THE "P-6" PERMISSIVE HAS BEEN DECLARED INOPERABLE, HOWEVER THE | | TS LCO ONLY APPLIES IN MODES 1 AND 2. THE LICENSEE INFORMED THE RESIDENT | | INSPECTOR, WHO WAS ON-SITE AT THE TIME OF THE TRIP. | | | +------------------------------------------------------------------------------+