U.S. Nuclear Regulatory Commission Operations Center Event Reports For 09/13/96 - 09/16/96 ** EVENT NUMBERS ** 30876 30999 31000 31001 31002 31003 31004 31005 31006 31007 !!!!!!!!! THIS EVENT HAS BEEN RETRACTED. THIS EVENT HAS BEEN RETRACTED !!!!!!! +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 30876 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: INDIAN POINT REGION: 1 |NOTIFICATION DATE: 08/14/96 | |UNIT: [ ] [3] [ ] STATE: NY |NOTIFICATION TIME: 23:54 [ET]| |RX TYPE: [2] W-4-LP,[3] W-4-LP |EVENT DATE: 08/14/96 | +------------------------------------------------+EVENT TIME: 20:20[EDT]| |NRC NOTIFIED BY: DINELLI |LAST UPDATE DATE: 09/13/96 | |HQ OPS OFFICER: BOB STRANSKY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |CARUSO RDO | |AESF 50.72(b)(2)(ii) ESF ACTUATION | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | | | | | 3 | N Y 100 POWER OPERATION | 80 POWER OPERATION | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | MAIN TURBINE RUNBACK DUE TO VOLTAGE TRANSIENT ON INSTRUMENT BUS | | | | AN OPERATOR WAS ATTEMPTING TO REINSTALL CONTROL POWER FUSES FOR A RADIATION | | MONITOR PANEL WHEN HE CAUSED A VOLTAGE SPIKE ON ITS ASSOCIATED INSTRUMENT | | BUS (#34). THIS VOLTAGE TRANSIENT CAUSED 1 OF 4 NUCLEAR POWER RANGE | | INDICATION CHANNELS (NI-43) TO PICK UP THE "NIS POWER RANGE DROPPED ROD | | STOP". (THIS FEATURE IS ACTUATED WHEN INDICATED POWER DECREASES BY MORE | | THAN 5% IN LESS THAN 5 SECONDS.) AN AUTOMATIC TURBINE LOAD RUNBACK | | OCCURRED, AND TURBINE LOAD WAS REDUCED TO 80% BEFORE THE RUNBACK WAS | | TERMINATED BY CONTROL ROOM OPERATORS. THE AXIAL FLUX PROFILE DEVIATED FROM | | ITS TARGET BAND BUT WAS RESTORED TO THE NORMAL OPERATING BAND WITHIN THE | | TIME SPECIFIED IN THE PLANT TECHNICAL SPECIFICATIONS. THE NRC RESIDENT HAS | | BEEN INFORMED BY THE LICENSEE. | | | | * * * UPDATE AT 1640 ON 09/13/96 FROM MCKEE TAKEN BY STRANSKY * * * | | | | THE LICENSEE IS RETRACTING THIS NOTIFICATION. THE TURBINE RUNBACK IS NOT AN | | ENGINEERED SAFEGURARDS FEATURE, AND THEREFORE THIS EVENT IS NOT REPORTABLE. | | THE NRC RESIDENT INSPECTOR HAS BEEN INFORMED BY THE LICENSEE. HOO NOTIFIED | | R1DO (COSTELLO). | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 30999 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: LASALLE REGION: 3 |NOTIFICATION DATE: 09/13/96 | |UNIT: [1] [2] [ ] STATE: IL |NOTIFICATION TIME: 10:43 [ET]| |RX TYPE: [1] GE-5,[2] GE-5 |EVENT DATE: 09/11/96 | +------------------------------------------------+EVENT TIME: 00:01[CDT]| |NRC NOTIFIED BY: SUBALUSKY |LAST UPDATE DATE: 09/13/96 | |HQ OPS OFFICER: CHAUNCEY GOULD +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: | | |CCCC 21.21 UNSPECIFIED PARAGRAPH | | | |VERNON HODGE NRR | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |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 82 POWER OPERATION | 82 POWER OPERATION | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | THE LICENSEE FOLLOWED UP ON A PROBABLE PART 21 THAT WAS SUBMITTED BY | | GENERAL ELECTRIC NUCLEAR ENERGY (GE-NE). | | | | THE NOTIFICATION SUBMITTED BY GE-NE PROVIDED THE RESULTS OF AN EVALUATION | | MADE BY GE-NE OF REPORTED FAILURES OF THE INSTANTANEOUS TRIP FUNCTION OF | | THE GE TYPE RMS-9 OVERCURRENT TRIP DEVICE PROGRAMMERS. THESE DEVICES WERE | | MANUFACTURED BY GE ELECTRICAL DISTRIBUTION AND CONTROL, AND SUPPLIED BY | | GE-NE AS SAFETY RELATED COMPONENTS FOR BALANCE-OF-PLANT OR UNSPECIFIED | | APPLICATIONS. SINCE THE APPLICATIONS AND ASSOCIATED SAFETY FUNCTIONS OF | | RMS-9 PROGRAMMERS SUPPLIED BY GE-NE ARE NOT KNOWN, IT IS NOT POSSIBLE FOR | | GE-NE TO EVALUATE THE SAFETY SIGNIFICANCE OF A POSSIBLE FAILURE. | | | | LASALLE EVALUATED THE GE REPORT AND HAS DETERMINED THAT THE | | DEFECT/NONCOMPLIANCE IS REPORTABLE UNDER THE REQUIREMENTS OF 10CFR21. | | | | GE-NE HAS LISTED APPROXIMATELY 27 PLANTS THAT ARE AFFECTED. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |GENERAL INFORMATION or OTHER | |EVENT NUMBER: 31000 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |LICENSEE: COGEMA MINING, INC. |NOTIFICATION DATE: 09/13/96 | | CITY: 90 MILES NORTH REGION: 4 |NOTIFICATION TIME: 11:35 [ET]| | COUNTY: STATE: WY |EVENT DATE: 09/12/96 | |LICENSE#: SUA-1341 AGREEMENT: N |EVENT TIME: 00:00[MDT]| | DOCKET: |LAST UPDATE DATE: 09/13/96 | | +-----------------------------+ | |PERSON ORGANIZATION| | |ELMO COLLINS RDO | | | | +------------------------------------------------+ | |NRC NOTIFIED BY: DONNA WICHES | | |HQ OPS OFFICER: DOUG WEAVER | | +------------------------------------------------+ | |EMERGENCY CLASS: NOT APPLICABLE | | |10 CFR SECTION: | | |NINF INFORMATION ONLY | | | | | | | | | | | | | | +------------------------------------------------+-----------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | MINE #SSM-18 WENT INTO EXCURSION STATUS | | | | THE MINE EXCEEDED SPECIFICATIONS IN CHLORIDES (15.3 mg/l VS 14.7 mg/l | | limit) AND IN ALKALINITY (133 mg/l VS 119.4 mg/l limit). THIS MINE IS | | CURRENTLY BEING CLEANED UP. THE WYOMING DEPARTMENT OF ENVIRONMENTAL | | QUALITY WAS INFORMED OF THIS EVENT. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 31001 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: MILLSTONE REGION: 1 |NOTIFICATION DATE: 09/13/96 | |UNIT: [1] [ ] [ ] STATE: CT |NOTIFICATION TIME: 12:01 [ET]| |RX TYPE: [1] GE-3,[2] CE,[3] W-4-LP |EVENT DATE: 09/13/96 | +------------------------------------------------+EVENT TIME: 11:40[EDT]| |NRC NOTIFIED BY: BIGIARELLI |LAST UPDATE DATE: 09/13/96 | |HQ OPS OFFICER: BOB STRANSKY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |COSTELLO RDO | |AOUT 50.72(b)(1)(ii)(B) OUTSIDE DESIGN BASIS | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | N N 0 REFUELING | 0 REFUELING | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | SOME SECONDARY SYSTEM PIPING DOES NOT MEET SEISMIC DESIGN REQUIREMENTS | | | | THE LICENSEE REPORTED THAT SOME PORTIONS OF TURBINE BUILDING SECONDARY | | CLOSED COOLING WATER AND CONDENSATE SYSTEM PIPING DO NOT MEET SEISMIC | | DESIGN REQUIREMENTS. THIS CONDITION HAS EXISTED SINCE ORIGINAL | | CONSTRUCTION. THE NRC RESIDENT INSPECTOR HAS BEEN INFORMED BY THE | | LICENSEE. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 31002 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: WATTS BAR REGION: 2 |NOTIFICATION DATE: 09/13/96 | |UNIT: [1] [ ] [ ] STATE: TN |NOTIFICATION TIME: 18:49 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 09/13/96 | +------------------------------------------------+EVENT TIME: 17:20[EDT]| |NRC NOTIFIED BY: CULISAK |LAST UPDATE DATE: 09/13/96 | |HQ OPS OFFICER: BOB STRANSKY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |AL BELISLE 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 | 66 POWER OPERATION | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | INFORMATION ONLY NOTIFICATION - FIRE ON MAIN FEEDWATER PUMP TURBINE | | | | THE LICENSEE REPORTED THAT A FIRE OCCURRED ON THE OUTBOARD BEARING OF THE | | '1A' MAIN FEEDWATER PUMP TURBINE. THE FIRE WAS IMMEDIATELY EXTINGUISHED. | | THE LICENSEE BEGAN REDUCING REACTOR POWER IN PREPARATION FOR REMOVING THE | | FEEDWATER PUMP FROM SERVICE. AT 1741, THE FIRE REFLASHED, AND THE | | FEEDWATER PUMP WAS TRIPPED. THE FIRE WAS AGAIN EXTINGUISHED. | | | | THE UNIT REMAINS IN OPERATION AT 66% POWER. THE LICENSEE HAS NOTIFIED THE | | NRC RESIDENT INSPECTOR OF THIS EVENT. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 31003 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: INDIAN POINT REGION: 1 |NOTIFICATION DATE: 09/13/96 | |UNIT: [2] [ ] [ ] STATE: NY |NOTIFICATION TIME: 23:27 [ET]| |RX TYPE: [2] W-4-LP,[3] W-4-LP |EVENT DATE: 09/13/96 | +------------------------------------------------+EVENT TIME: 23:20[EDT]| |NRC NOTIFIED BY: LEJOY |LAST UPDATE DATE: 09/13/96 | |HQ OPS OFFICER: BOB STRANSKY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |COSTELLO RDO | |ANHU 50.72(b)(1)(iii) HURRICANE | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 2 | N Y 100 POWER OPERATION | 100 POWER OPERATION | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | HURRICANE WITHIN 500 NAUTICAL MILES OF PLANT | | | | THE LICENSEE REPORTED THAT HURRICANE HORTENSE HAS APPROACHED TO WITHIN 500 | | NAUTICAL MILES OF THE SITE. [HOO NOTE: THE CURRENT WEATHER FORECAST | | PREDICTS THAT HORTENSE WILL NOT APPROACH THE EASTERN U.S. COAST.] THE NRC | | RESIDENT INSPECTOR WILL BE INFORMED OF THIS NOTIFICATION BY THE LICENSEE. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 31004 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: VERMONT YANKEE REGION: 1 |NOTIFICATION DATE: 09/14/96 | |UNIT: [1] [ ] [ ] STATE: VT |NOTIFICATION TIME: 03:19 [ET]| |RX TYPE: [1] GE-4 |EVENT DATE: 09/13/96 | +------------------------------------------------+EVENT TIME: 20:30[EDT]| |NRC NOTIFIED BY: ANDY WISNIEWSKI |LAST UPDATE DATE: 09/14/96 | |HQ OPS OFFICER: DICK JOLLIFFE +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |FRANK COSTELLO RDO | |AINA 50.72(b)(2)(iii)(A) POT UNABLE TO SAFE SD | | |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 COLD SHUTDOWN | 0 COLD SHUTDOWN | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | - EDG OUTPUT BREAKER MAY HAVE BEEN INOPERABLE FOR THE LAST 25 DAYS - | | | | AT 2030 ON 09/13/96, THE LICENSEE DISCOVERED THREE BOLTS ON THE FLOOR NEAR | | THE OUTPUT BREAKER OF 1 OF 2 EDGs (#1-1A). THE BREAKER WAS OPEN AND ITS | | CLOSING SPRINGS WERE DISCHARGED. TWO OF THE BOLTS CAME FROM THE SPRING | | CHARGING MOTOR; THE SOURCE OF THE THIRD BOLT IS TO BE DETERMINED. THE | | LICENSEE RACKED DOWN THE BREAKER, TAGGED IT OUT TO PREVENT DISTURBANCE OF | | THE AS-FOUND CONDITIONS, AND DECLARED THE BREAKER AND THE EDG INOPERABLE. | | | | WITH THE BREAKER OPEN AND ITS CLOSING SPRINGS DISCHARGED, THE BREAKER CAN | | NOT BE CLOSED EITHER ELECTRICALLY (REMOTE OPERATION) OR MANUALLY (LOCAL | | OPERATION). | | | | THE LICENSEE BELIEVES THAT THIS BREAKER COULD HAVE BEEN INOPERABLE SINCE | | THE LAST TECH SPEC SURVEILLANCE TEST WAS PERFORMED ON THE BREAKER ON | | 08/19/96 WHILE THE PLANT WAS AT 91% POWER. | | | | THE PLANT WAS SHUTDOWN FOR A REFUELING OUTAGE ON 09/06/96. | | | | TECH SPEC LCO A/S 3.5.H.3 PROHIBITS ANY ACTIVITIES THAT HAVE THE POTENTIAL | | TO DRAIN THE REACTOR VESSEL. | | | | THE LICENSEE IS INVESTIGATING THIS SITUATION. | | | | THE LICENSEE WILL INFORM THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 31005 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: SUSQUEHANNA REGION: 1 |NOTIFICATION DATE: 09/15/96 | |UNIT: [1] [ ] [ ] STATE: PA |NOTIFICATION TIME: 09:55 [ET]| |RX TYPE: [1] GE-4,[2] GE-4 |EVENT DATE: 09/15/96 | +------------------------------------------------+EVENT TIME: 07:15[EDT]| |NRC NOTIFIED BY: DAN BOYLE |LAST UPDATE DATE: 09/15/96 | |HQ OPS OFFICER: DICK JOLLIFFE +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |FRANK COSTELLO 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 +------------------------------------------------------------------------------+ | - CONTAINMENT PENETRATION LEAK RATE ABOVE TECH SPEC LIMIT DURING AN LLRT - | | | | UNIT 1 IS IN CONDITION 5 IN A REFUELING OUTAGE. | | | | THE 'D' MAIN STEAM LINE VALVE CONTAINMENT PENETRATION LEAK RATE DURING | | A LOCAL LEAK RATE TEST (LLRT) WAS 96.1 STANDARD LITERS PER MINUTE | | (203.7 STANDARD CUBIC FEET PER HOUR); PLANT TECH SPEC LEAK RATE LIMIT IS | | 21.7 STANDARD LITERS PER MINUTE (46 STANDARD CUBIC FEET PER HOUR). | | | | THE LICENSEE WILL REPAIR THE INBOARD AND OUTBOARD CONTAINMENT PENETRATION | | VALVES. | | | | THE LICENSEE WILL INFORM THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 31006 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: BROWNS FERRY REGION: 2 |NOTIFICATION DATE: 09/15/96 | |UNIT: [ ] [ ] [3] STATE: AL |NOTIFICATION TIME: 19:22 [ET]| |RX TYPE: [1] GE-4,[2] GE-4,[3] GE-4 |EVENT DATE: 09/15/96 | +------------------------------------------------+EVENT TIME: 17:24[CDT]| |NRC NOTIFIED BY: ROGERS |LAST UPDATE DATE: 09/15/96 | |HQ OPS OFFICER: BOB STRANSKY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |AL BELISLE RDO | |ASHU 50.72(b)(1)(i)(A) PLANT S/D REQD BY TS | | |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 | +-----+----------+-------+--------+-----------------+--------+-----------------+ | | | | | | | | | 3 | M/R Y 40 POWER OPERATION | 0 HOT SHUTDOWN | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | UNIT 3 MANUALLY SCRAMMED DUE TO TECHNICAL SPECIFICATION REQUIRED SHUTDOWN | | | | AT 2047 (CDT) ON 09/14/96, THE #3A RECIRCULATION PUMP MOTOR/GENERATOR SET | | TRIPPED DUE TO A GENERATOR FIELD GROUND. THE LICENSEE ENTERED A 24 HOUR | | LIMITED CONDITION FOR OPERATION (LCO) DUE TO PLANT OPERATION WITH ONLY A | | SINGLE RECIRCULATION LOOP. | | | | (HOO NOTE: THE LICENSEE HAD REQUESTED RELIEF FROM THE NRC EARLIER TODAY IN | | ORDER TO CONTINUE PLANT OPERATION WHILE THE RECIRC M/G SET WAS REPAIRED; | | HOWEVER, THE NRC DENIED THE REQUEST.) | | | | AT 1724 (CDT) ON 09/15/96, THE LICENSEE MANUALLY SCRAMMED UNIT 3 FROM 40% | | POWER IN ORDER TO COMPLY WITH A TECH SPEC LCO SHUTDOWN ACTION STATEMENT. | | ALL CONTROL RODS INSERTED COMPLETELY AND ALL SYSTEMS FUNCTIONED, AS | | EXPECTED. UNIT 3 IS STABLE IN CONDITION 3 (HOT SHUTDOWN). | | | | THE NRC RESIDENT INSPECTOR HAS BEEN INFORMED OF THIS EVENT BY THE LICENSEE. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 31007 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: BIG ROCK POINT REGION: 3 |NOTIFICATION DATE: 09/16/96 | |UNIT: [1] [ ] [ ] STATE: MI |NOTIFICATION TIME: 04:31 [ET]| |RX TYPE: [1] GE-1 |EVENT DATE: 09/16/96 | +------------------------------------------------+EVENT TIME: 02:51[EDT]| |NRC NOTIFIED BY: TOM MORT |LAST UPDATE DATE: 09/16/96 | |HQ OPS OFFICER: DICK JOLLIFFE +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |MARK RING RDO | |ARPS 50.72(b)(2)(ii) RPS ACTUATION | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | A/R Y 55 POWER OPERATION | 0 HOT SHUTDOWN | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | -AUTO Rx SCRAM FROM 55% DUE TO MAIN TURBINE STEAM ADMISSION VALVES CLOSING- | | | | WHILE INCREASING REACTOR POWER, THE MAIN TURBINE STEAM ADMISSION VALVES | | CLOSED FOR UNKNOWN REASONS. THIS CAUSED REACTOR PRESSURE TO INCREASE FROM | | THE NORMAL OPERATING PRESSURE OF 1335 PSIG TO THE REACTOR HIGH PRESSURE | | SCRAM SETPOINT OF 1385 PSIG WHICH CAUSED THE REACTOR TO AUTO SCRAM FROM | | 55% POWER. | | | | ALL CONTROL RODS INSERTED COMPLETELY. STEAM IS BEING DUMPED TO THE MAIN | | CONDENSER. THE PLANT IS STABLE IN CONDITION 3 (HOT SHUTDOWN). | | | | THE LICENSEE IS INVESTIGATING THE CAUSE OF THE VALVES CLOSING. | | | | THE LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+