U.S. Nuclear Regulatory Commission Operations Center Event Reports For 02/28/95 - 03/01/95 ** EVENT NUMBERS ** 28453 28454 28455 28456 28457 28458 28459 28460 +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28453 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: FERMI REGION: 3 |NOTIFICATION DATE: 02/28/95 | |UNIT: [2] [ ] [ ] STATE: MI |NOTIFICATION TIME: 04:38 [ET]| |RX TYPE: [2] GE-4 |EVENT DATE: 02/28/95 | +------------------------------------------------+EVENT TIME: 04:16[EST]| |NRC NOTIFIED BY: SUE REITH |LAST UPDATE DATE: 02/28/95 | |HQ OPS OFFICER: JOSEPH SEBROSKY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: UNUSUAL EVENT +-----------------------------+ |10 CFR SECTION: |JIM MCCORMICKBARGER RDO | |AAEC 50.72(a)(1)(i) EMERGENCY DECLARED |WILLIAM TRAVERS EO | |NLCO TECH SPEC LCO A/S |CARR FEMA | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 2 | N N 0 STARTUP | 0 COLD SHUTDOWN | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | UNUSUAL EVENT DECLARED AND TERMINATED DUE TO A REACTOR VESSEL LEVEL | | DIVERGENCE RESULTING IN SHUTDOWN OF THE UNIT. | | | | AT 4:16 AN UNUSUAL EVENT WAS DECLARED DUE TO LOSS OF ESF REQUIRING SHUTDOWN | | IN ACCORDANCE WITH TECHNICAL SPECIFICATIONS. ISOLATION AND ACTUATION | | INSTRUMENTATION CHANNELS WERE DECLARED INOPERABLE PER TECH SPEC 3.3.2.1 | | WHEN DIVISION II NARROW RANGE LEVEL INDICATORS BEGAN DIVERGING FROM | | DIVISION I LEVEL INSTRUMENTATION. AT THE TIME THE REACTOR WAS IN MODE 2 | | STARTUP WITH ALL RODS INSERTED PERFORMING TESTING ON THE MAIN TURBINE. | | | | TO COMPLY WITH THE TECH SPEC ACTION STATEMENT THE MODE SWITCH WAS PLACED IN | | SHUTDOWN. THIS PLACED THE UNIT IN A COLD SHUTDOWN CONDITION. CURRENT | | REACTOR COOLANT TEMPERATURE IS 160øF. THE UNUSUAL EVENT WAS TERMINATED AT | | THE SAME TIME THE MODE SWITCH WAS PLACED IN SHUTDOWN. | | | | THE LICENSEE IS CONTINUING TO INVESTIGATE THE CAUSE OF THE LEVEL | | DIVERGENCE. THE LICENSEE FIRST NOTICED THE INCREASE IN THE DIVERGENCE ON | | THE EARLY AFTERNOON OF 2/27/95. AT 16:32 ON 2/27/95 DIVISION II NARROW | | RANGE LEVEL INSTRUMENTS WERE DECLARED INOPERABLE BECAUSE THEY WERE READING | | 5 INCHES HIGHER THAN DIVISION I INSTRUMENTS. THIS PLACED THE LICENSEE IN A | | 12 HOUR SHUTDOWN LCO. THE LICENSEE WAS UNABLE TO RESOLVE THE LEVEL | | DISCREPANCY AND CONSEQUENTLY WENT TO SHUTDOWN ON THE MODE SELECTOR SWITCH. | | | | DIVISION II NARROW RANGE LEVEL INSTRUMENTS ARE CURRENTLY READING | | APPROXIMATELY 10 INCHES HIGHER THAN DIVISION I. THE LICENSEE INITIALLY | | SUSPECTED REFERENCE LEG LEAKAGE AND HAS PERFORMED WALKDOWNS OF ALL THE | | INSTRUMENTATION WITHOUT IDENTIFYING ANY PROBLEMS. | | | | THE LICENSEE INFORMED STATE, LOCAL, AND CANADIAN OFFICIALS IN ACCORDANCE | | WITH THEIR EMERGENCY PLAN. THE LICENSEE ALSO NOTIFIED THE RESIDENT | | INSPECTOR. HOO NOTIFIED AECB OF CANADA (PEREIRA). | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28454 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: NINE MILE POINT REGION: 1 |NOTIFICATION DATE: 02/28/95 | |UNIT: [ ] [2] [ ] STATE: NY |NOTIFICATION TIME: 08:50 [ET]| |RX TYPE: [1] GE-2,[2] GE-5 |EVENT DATE: 02/28/95 | +------------------------------------------------+EVENT TIME: 06:50[EST]| |NRC NOTIFIED BY: CIGLER |LAST UPDATE DATE: 02/28/95 | |HQ OPS OFFICER: DICK JOLLIFFE +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |HAROLD GRAY 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 100 POWER OPERATION | 100 POWER OPERATION | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | - CONTRACT EMPLOYEE FOUND DECEASED AT HIS DESK AT THE PLANT - | | | | AT 0650 ON 02/28/95, A CONTRACT EMPLOYEE WAS FOUND SLUMPED OVER IN HIS | | CHAIR IN HIS OFFICE. THE FIRE BRIGADE WAS CALLED AND BEGAN ADMINISTERING | | CPR. THE NONCONTAMINATED CONTRACT EMPLOYEE WAS TRANSFERRED BY AMBULANCE | | TO OSWEGO HOSPITAL WHERE HE WAS PRONOUNCED DEAD ON ARRIVAL. | | | | LICENSEE NOTIFIED THE NRC RESIDENT INSPECTOR AND PLANS TO NOTIFY OSHA. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |OTHER NUCLEAR MATERIAL | |EVENT NUMBER: 28455 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |LICENSEE: SYNCOR INTERNATIONAL CORP |NOTIFICATION DATE: 02/28/95 | | CITY: STAMFORD REGION: 1 |NOTIFICATION TIME: 12:20 [ET]| | COUNTY: STATE: CT |EVENT DATE: 02/27/95 | |LICENSE#: AGREEMENT: N |EVENT TIME: 15:30[EST]| | DOCKET: |LAST UPDATE DATE: 02/28/95 | | +-----------------------------+ | |PERSON ORGANIZATION| | |GRAY RDO | | | | +------------------------------------------------+ | |NRC NOTIFIED BY: DOMITER | | |HQ OPS OFFICER: BOB STRANSKY | | +------------------------------------------------+ | |EMERGENCY CLASS: NOT APPLICABLE | | |10 CFR SECTION: | | |NINF INFORMATION ONLY | | | | | | | | | | | | | | +------------------------------------------------+-----------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | A FUME HOOD AT THE SYNCOR FACILITY IN STAMFORD, CT HAS FAILED. THE | | LICENSEE HAS BEEN PERFORMING DAILY AIR SAMPLES, AND AIRBORNE CONCENTRATIONS | | OF RADIOACTIVE MATERIALS INSIDE THE FACILITY ARE BELOW ALL LIMITS. MATERIAL | | PROCESSING HAS BEEN SUSPENDED UNTIL THE HOOD IS REPAIRED. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28456 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: MAINE YANKEE REGION: 1 |NOTIFICATION DATE: 02/28/95 | |UNIT: [1] [ ] [ ] STATE: ME |NOTIFICATION TIME: 13:15 [ET]| |RX TYPE: [1] CE |EVENT DATE: 02/28/95 | +------------------------------------------------+EVENT TIME: 11:45[EST]| |NRC NOTIFIED BY: McDOUGOLD |LAST UPDATE DATE: 02/28/95 | |HQ OPS OFFICER: BOB STRANSKY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |GRAY RDO | |ADAS 50.72(b)(2)(i) DEG/UNANALYZED COND | | |CDEF 21.21(b)(2) DEFECTS/NONCOMPLIANCE | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | N N 0 REFUELING | 0 REFUELING | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | TWENTY CONTROL SWITCHES INSTALLED IN THE CONTROL ROOM HAVE BEEN FOUND TO | | HAVE CRACKS. | | | | THE FOLLOWING IN TEXT OF A FACSIMILE SUBMITTED BY THE LICENSEE: | | | | "WE HAVE EXAMINED 20 CONTROL SWITCHES ON THE MAIN CONTROL BOARD IN THE | | CONTROL ROOM. EACH SWITCH HAS SOME TYPE OF PROBLEM WITH A CRACK THAT IF | | THE CRACK PROPAGATES TO A BREAK, POTENTIALLY ALLOWS THE CONTACT TO DETACH | | FROM THE CAM FOLLOWER. IN ADDITION, A NEW SWITCH FROM STOCK WAS EXAMINED | | AND IT ALSO HAD EVIDENCE OF CRACKING. THESE SWITCHES ARE SAFETY AND | | NON-SAFETY CLASS AND HAD THEY BEEN FOUND DEFECTIVE (COMPLETE SEPARATION) | | WHILE THE REACTOR WAS AT POWER, IT COULD HAVE RESULTED IN THE PLANT BEING | | SERIOUSLY DEGRADED THAT SIGNIFICANTLY COMPROMISED PLANT SAFETY. | | | | PRESENTLY THE PLANT IS IN A SHUTDOWN CONDITION WITH THE REACTOR DEFUELED. | | SPENT FUEL POOL COOLING IS IN SERVICE AND WITHOUT PROBLEMS. OUR OUTAGE | | RISK MANAGEMENT PROGRAM HAS CONTINGENCY PLANS IN PLACE TO COMPENSATE FOR | | ANY PROBLEMS WITH SPENT FUEL POOL COOLING. (THE TIME TO BOIL IS 18 HOURS | | WITH A LOSS OF COOLING.) ADDITIONAL INFORMATION WILL BE SENT TO THE NRC | | VIA AN LER AS REQUIRED BY 50.73(A)(2)(ii) AND 10 CFR PART 21." | | | | THE NRC RESIDENT INSPECTOR HAS BEEN INFORMED OF THIS CONDITION BY THE | | LICENSEE. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28457 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: POINT BEACH REGION: 3 |NOTIFICATION DATE: 02/28/95 | |UNIT: [1] [ ] [ ] STATE: WI |NOTIFICATION TIME: 22:26 [ET]| |RX TYPE: [1] W-2-LP,[2] W-2-LP |EVENT DATE: 02/28/95 | +------------------------------------------------+EVENT TIME: 20:59[CST]| |NRC NOTIFIED BY: BAUER |LAST UPDATE DATE: 02/28/95 | |HQ OPS OFFICER: BOB STRANSKY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: UNUSUAL EVENT +-----------------------------+ |10 CFR SECTION: |MCCORMICK-BARGER RDO | |AAEC 50.72(a)(1)(i) EMERGENCY DECLARED |THOMAS EO | |ASHU 50.72(b)(1)(i)(A) PLANT S/D REQD BY TS |AUSTIN FEMA | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | N Y 100 POWER OPERATION | 90 POWER OPERATION | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | UNUSUAL EVENT DECLARED DUE TO PLANT SHUTDOWN REQUIRED BY TECHNICAL | | SPECIFICATIONS. | | | | THE FOLLOWING IS TEXT OF A FACSIMILE SUBMITTED BY THE LICENSEE: | | | | "POINT BEACH UNIT 1 IS IN AN UNUSUAL EVENT EMERGENCY CLASSIFICATION | | REQUIRING UNIT 1 SHUTDOWN IN 3 HOURS DUE TO LOSS OF DC CONTROL POWER TO | | SAFEGUARDS RELAY RACK 1C157. UNIT 1 IS SHUTTING DOWN AT A RATE OF 15% PER | | HOUR. TROUBLESHOOTING EFFORTS ARE IN PROGRESS. IT APPEARS THAT DC CONTROL | | POWER WAS LOST AS A RESULT OF DC CONTROL POWER INDICATING LAMP FAILURE. THE | | LAMP AND FUSES ARE BEING REPLACED AT THIS TIME. IF REPAIRS ARE | | UNSUCCESSFUL, THE RATE OF SHUTDOWN WILL BE INCREASED." | | | | ALL EMERGENCY SAFETY FEATURES EQUIPMENT IS AVAILABLE, WITH THE EXCEPTION OF | | THE "A" COMPONENT COOLING WATER PUMP. THE NRC RESIDENT WILL BE INFORMED BY | | THE LICENSEE. THE STATE AND LOCAL COUNTIES HAVE BEEN NOTIFIED BY THE | | LICENSEE. | | | | * * * UPDATE 2324 2/28/95 BY BAUER TAKEN BY STRANSKY * * * | | | | THE UNUSUAL EVENT WAS TERMINATED AT 2145 CST WHEN POWER WAS RESTORED TO THE | | RELAY RACK. TECHNICIANS REPLACED THE INDICATING LIGHT BULB AND ITS HOLDER, | | AND ALSO REPLACED A BLOWN FUSE ON THE RELAY RACK. THE NRC RESIDENT HAS | | BEEN INFORMED. NOTIFIED R3DO (McCORMICK-BARGER), EO (THOMAS), FEMA | | (AUSTIN). | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28458 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: SOUTH TEXAS REGION: 4 |NOTIFICATION DATE: 02/28/95 | |UNIT: [1] [ ] [ ] STATE: TX |NOTIFICATION TIME: 23:32 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 02/28/95 | +------------------------------------------------+EVENT TIME: 17:45[CST]| |NRC NOTIFIED BY: KRUGER |LAST UPDATE DATE: 02/28/95 | |HQ OPS OFFICER: BOB STRANSKY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |POWERS RDO | |NLTR LICENSEE 24 HR REPORT | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |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 +------------------------------------------------------------------------------+ | LICENSEE 24 HOUR EVENT REPORT DUE TO MAIN STEAM SAFETY VALVES FOUND OUTSIDE | | OF TOLERANCE. | | | | THE FOLLOWING IS TEXT OF A FACSIMILE SUBMITTED BY THE LICENSEE: | | | | "PURSUANT TO OPERATING LICENSE NPF-76 SECTION 2G, AND 10 CFR | | 50.73(A)(2)(B), THIS NOTIFICATION IS BEING MADE DUE TO THE IDENTIFICATION | | OF 7 OUT OF 20 STEAM LINE SAFETIES FOUND IN A CONDITION OUTSIDE THE | | TOLERANCE STATED IN T.S. 3.7.1.1, TABLE 3.7-2. | | | | DURING THE PERFORMANCE OF THE MAIN STEAM SAFETY VALVE INSERVICE TEST WHICH | | WAS COMMENCED ON 2/27/95 AND COMPLETED ON 2/28/95, THE FOLLOWING STEAM LINE | | SAFETIES WERE FOUND WITH LIFT SETTINGS GREATER THAN OR EQUAL TO PLUS OR | | MINUS 1% OF ALLOWED: | | | | SG 1B... PSV-7420D | | SG 1C... PSV-7430,7430B,7430C | | SG 1D... PSV-7440A,7440B,7440D | | | | THE ABOVE LISTED VALVE LIFT SETTINGS WERE ADJUSTED TO BE WITHIN THEIR | | ALLOWABLE TOLERANCE. ALL OTHER STEAM LINE SAFETY VALVES WERE DETERMINED TO | | BE WITHIN THE REQUIRED ALLOWABLE TOLERANCE. | | | | THE NRC RESIDENT INSPECTOR WILL BE INFORMED. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28459 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: CLINTON REGION: 3 |NOTIFICATION DATE: 03/01/95 | |UNIT: [1] [ ] [ ] STATE: IL |NOTIFICATION TIME: 05:02 [ET]| |RX TYPE: [1] GE-6 |EVENT DATE: 03/01/95 | +------------------------------------------------+EVENT TIME: 03:45[CST]| |NRC NOTIFIED BY: JIM SCHOTTEL |LAST UPDATE DATE: 03/01/95 | |HQ OPS OFFICER: DOUG WEAVER +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: UNUSUAL EVENT +-----------------------------+ |10 CFR SECTION: |JIM MCCORMICKBARGER RDO | |AAEC 50.72(a)(1)(i) EMERGENCY DECLARED |THOMAS EO | | |BAGWELL FEMA | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | N Y 75 POWER OPERATION | 75 POWER OPERATION | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | UNUSUAL EVENT DECLARED BASED ON A FIRE LASTING MORE THAN 10 MINUTES | | | | AN UNUSUAL EVENT WAS DECLARED DUE TO A FIRE ON THE ALPHA MAIN FEED PUMP | | TURBINE. THE FIRE WAS DISCOVERED AT 0335 CST. THE UE WAS DECLARED AT 0345 | | CST. ALTHOUGH THE FIRE BRIGADE RESPONDED IMMEDIATELY AND PUT OUT THE FIRE, | | SUBSEQUENT REFLASHES EXCEEDED 10 MINUTES AND AN UNUSUAL EVENT WAS DECLARED. | | THE LICENSEE PLANS TO TERMINATE THE UE WHEN THERE IS NO CHANCE OF ANOTHER | | REFLASH. MEMBERS OF THE FIRE BRIGADE WILL REMAIN IN THE MAIN FEED PUMP | | ROOM UNTIL THEIR IS NO RISK OF FURTHER FIRE. ALL ECCSs ARE OPERABLE. | | | | THE BRAVO MAIN FEED PUMP TRIPPED YESTERDAY AT ABOUT 83% POWER FOR UNKNOWN | | REASONS. THE LICENSEE REDUCED POWER TO 75% AT THAT POINT AND HAS BEEN | | OPERATING AT 75% POWER SINCE THEN. THE ALPHA PUMP IS OPERATING NEAR | | CAPACITY AND IS BEING SUPPLIED WITH STEAM FROM THE MAIN STEAM LINES VICE | | THE CROSS OVER LINES. THE LICENSEE HAS SPECULATED THAT THE INCREASED | | TEMPERATURE OF THE SUPPLY STEAM IN A PIPE WHICH HAS NOT SUPPLIED STEAM FOR | | A LONG PERIOD OF TIME MAY HAVE IGNITED SOME OIL SOAKED LAGGING. | | | | THE LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. | | | | * * * UPDATE AT 0631 ON 3/1/95 BY SCHOTTEL TAKEN BY WEAVER * * *] | | THE LICENSEE TERMINATED THE UNUSUAL EVENT AT 0528 CST AFTER THE LAGGING WAS | | REMOVED FROM THE AREA OF THE FIRE. ALL COMBUSTIBLE MATERIAL HAS | | EFFECTIVELY BEEN REMOVED FROM THE AREA OF THE FIRE. THE LICENSEE REDUCED | | POWER TO 62% SHORTLY AFTER MAKING THE INITIAL NOTIFICATION. THIS CAUSED | | THE STEAM SUPPLY TO THE FEED PUMP TURBINE TO SHIFT BACK TO THE CROSS OVER | | PIPING. HOO NOTIFIED RDO(MCCORMICKBARGER), FEMA (BAGWELL), EO (THOMAS) | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28460 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: GRAND GULF REGION: 2 |NOTIFICATION DATE: 03/01/95 | |UNIT: [1] [ ] [ ] STATE: MS |NOTIFICATION TIME: 05:45 [ET]| |RX TYPE: [1] GE-6 |EVENT DATE: 03/01/95 | +------------------------------------------------+EVENT TIME: 01:05[CST]| |NRC NOTIFIED BY: POWELL BREWER |LAST UPDATE DATE: 03/01/95 | |HQ OPS OFFICER: DOUG WEAVER +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |WILLIAM CLINE 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 +------------------------------------------------------------------------------+ | RCIC SYSTEM ISOLATED WHILE RESTORING FROM MAINTENANCE | | | | THE RCIC SYSTEM WAS BEING RESTORED TO A FUNCTIONAL STATUS FOLLOWING | | MAINTENANCE. WHILE THROTTLING OPEN VALVE E51 F064 AS PART OF THE | | RESTORATION A RCIC HIGH STEAM FLOW ISOLATION WAS RECEIVED. THE SIGNAL HAS | | BEEN RESET AND THE ISOLATION VALVES OPENED. THE ACTUAL CAUSE OF THE HIGH | | STEAM FLOW SIGNAL WAS CONDENSATION MOVING THROUGH THE LINE WHEN F064 WAS | | OPENED. | | | | THIS PROBLEM HAD BEEN ADDRESSED PREVIOUSLY BY A DESIGN CHANGE WHICH | | INSTALLED A NEW SMALLER VALVE (E51 F076) TO BE USED AS A THROTTLE. THE | | PLANT DECIDED NOT TO USE F076 BECAUSE IT IS CURRENTLY BACKSEATED TO PREVENT | | LEAKAGE INTO THE DRYWELL. THE SYSTEM IS CURRENTLY TERMED FUNCTIONAL. THE | | SYSTEM IS EXPECTED TO BE RETURNED TO OPERABILITY WITHIN A FEW HOURS WHEN | | RETESTS ARE COMPLETED. | | | | THE LICENSEE WILL INFORM THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+