U.S. Nuclear Regulatory Commission Operations Center Event Reports For 06/28/94 - 06/29/94 ** EVENT NUMBERS ** 27281 27391 27453 27454 27458 27459 27460 27461 27462 !!!!!!!!! THIS EVENT HAS BEEN RETRACTED. THIS EVENT HAS BEEN RETRACTED !!!!!!! +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27281 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: HATCH REGION: 2 |NOTIFICATION DATE: 05/20/94 | |UNIT: [1] [ ] [ ] STATE: GA |NOTIFICATION TIME: 17:57 [ET]| |RX TYPE: [1] GE-4,[2] GE-4 |EVENT DATE: 05/20/94 | +------------------------------------------------+EVENT TIME: 16:10[CDT]| |NRC NOTIFIED BY: COLEMAN |LAST UPDATE DATE: 06/28/94 | |HQ OPS OFFICER: CHAUNCEY GOULD +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |EDWARD MCALPINE RDO | |AIND 50.72(b)(2)(iii)(D) ACCIDENT MITIGATION | | |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 +------------------------------------------------------------------------------+ | THE LICENSEE DECLARED HIGH PRESSURE COOLANT INJECTION SYSTEM INOPERABLE AND | | RE-ENTERED A 14 DAY LCO ACTION STATEMENT THAT HAD BEEN INITIALLY ENTERED 5 | | DAYS BEFORE. | | | | THE LICENSEE FIRST ENTERED THE 14 DAY LCO ACTION STATEMENT ON 5/15/94 WHEN | | HPCI WAS DECLARED INOPERABLE DUE TO A DEFECTIVE FLOW CONTROLLER. THE | | CONTROLLER WAS REPAIRED AND TESTED ON 5/17/94 AND THEY EXITED THE LCO. ON | | 5/20/94 THEY DISCOVERED THAT THE REPAIRS WERE MADE WITH NON-QUALIFIED PARTS | | SO HPCI WAS AGAIN DECLARED INOPERABLE AND THEY RE-ENTERED THE LCO. THEY ARE | | INVESTIGATING WHY NON-QUALIFIED PARTS WERE USED IN THIS REPAIR. THEY HAVE 9 | | DAYS LEFT OF THE 14 DAY LCO TO COMPLETE REPAIRS. ALL OTHER ECCS EQUIPMENT | | HAS BEEN OPERABLE SINCE 5/15/94. | | | | HE RI WILL BE INFORMED. | | | | * * * UPDATE 06/28/94 0830EDT FROM:HAMMONDS BY:SCARFO * * * | | THE LICENSEE IS RETRACTING THIS EVENT ON THE BASIS THAT THE NON-QUALIFIED | | PARTS PASSED THE "COMMERCIAL-DEDICATION" PROCESS AND THE HPCI SYSTEM PASSED | | THE OPERABILITY SURVEILLANCE WITH THE COMMERCIALLY-DEDICATED PARTS | | INSTALLED. THEREFORE, THE HPCI SYSTEM WAS OPERABLE AND THIS IS NOT A | | REPORTABLE EVENT. THE LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ !!!!!!!!! THIS EVENT HAS BEEN RETRACTED. THIS EVENT HAS BEEN RETRACTED !!!!!!! +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27391 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: HOPE CREEK REGION: 1 |NOTIFICATION DATE: 06/13/94 | |UNIT: [1] [ ] [ ] STATE: NJ |NOTIFICATION TIME: 15:28 [ET]| |RX TYPE: [1] GE-4 |EVENT DATE: 06/13/94 | +------------------------------------------------+EVENT TIME: 12:10[EDT]| |NRC NOTIFIED BY: FRANK HUGHES |LAST UPDATE DATE: 06/28/94 | |HQ OPS OFFICER: THOMAS ANDREWS +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |GENE KELLY 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 +------------------------------------------------------------------------------+ | SERVICE WATER ISOLATION VALVE EAHV-2204 (SERVICE WATER TO NON-SAFETY | | RELATED EQUIPMENT) CLOSED ON ROOM FLOODING ALARM (CAPACITY PROBE) DUE TO | | PAINTERS PLACING A PORTABLE FAN WHERE IT WOULD BLOW ON THE CAPACITY PROBE | | LSH2365B, CAUSING THE VALVE TO CLOSE. THIS VALVE GOES TO THE REACTOR | | AUXILIARY COOLING SYSTEM. FLOW THROUGH THE VALVE HAS BEEN REINSTATED. | | | | THE LICENSEE HAS NOTIFIED LOWER ALLOWAYS CREEK TOWNSHIP AND WILL NOTIFY THE | | NRC RESIDENT INSPECTOR. | | | | *** RETRACTION FROM KRUEGER TO HUFFMAN AT 1358 EDT ON 6/28/94 *** | | THE ROOM FLOODING ALARM SIGNAL IS AN ESSENTIAL AUXILIARY SUPPORT SYSTEM | | SIGNAL AND NOT AN ESF SIGNAL. THE NRC RESIDENT INSPECTOR AND | | R1DO(DOERFLEIN) HAVE BEEN NOTIFIED. | +------------------------------------------------------------------------------+ !!!!!!!!! THIS EVENT HAS BEEN RETRACTED. THIS EVENT HAS BEEN RETRACTED !!!!!!! +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27453 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: HOPE CREEK REGION: 1 |NOTIFICATION DATE: 06/27/94 | |UNIT: [1] [ ] [ ] STATE: NJ |NOTIFICATION TIME: 03:44 [ET]| |RX TYPE: [1] GE-4 |EVENT DATE: 06/27/94 | +------------------------------------------------+EVENT TIME: 01:45[EDT]| |NRC NOTIFIED BY: RABDY RIDDLE |LAST UPDATE DATE: 06/28/94 | |HQ OPS OFFICER: JOSEPH SEBROSKY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |ROGGE RDO | |APRE 50.72(b)(2)(vi) OFFSITE NOTIFICATION | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |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 +------------------------------------------------------------------------------+ | THE STATE OF NEW JERSEY WAS NOTIFIED OF A DISCHARGE OF HYDRAZINE EXCEEDING | | THE LICENSEE'S NATIONAL POLLUTION DISCHARGE AND ELIMINATION SYSTEM (NPDES) | | PERMIT. | | | | THE NEW JERSEY DEPARTMENT OF ENVIRONMENTAL PROTECTION WAS NOTIFIED BY THE | | LICENSEE THAT SEVERAL HUNDRED GALLONS OF WATER WERE DRAINED FROM AN | | AUXILIARY BOILER IN SUPPORT OF MAINTENANCE. THIS WATER WAS IDENTIFIED TO | | CONTAIN HYDRAZINE OF 30 PPB CONCENTRATION. THE CURRENT NPDES PERMIT DOES | | NOT ALLOW THE LICENSEE TO DISCHARGE ANY HYDRAZINE. | | | | THE LICENSEE WILL INFORM THE RESIDENT INSPECTOR AND HAS INFORMED LOWER | | ALLOWAYS CREEK TOWNSHIP OFFICIALS. | | | | *** RETRACTION FROM KRUEGER TO HUFFMAN AT 1358 EDT ON 6/28/94 *** | | SUBSEQUENT INVESTIGATION HAS SHOWN THAT THE ACTUAL HYDRAZINE CONCENTRATION | | OF WATER DRAINED WAS LESS THAN DETECTABLE. THE ORIGINAL SAMPLE RESULTS WERE | | ERRONEOUS DUE TO DISCOLORATION OF THE SAMPLE WHICH CAUSED A FALSE HYDRAZINE | | CONCENTRATION INDICATION. THE NRC RESIDENT AND R1DO(DOERFLEIN) WERE | | NOTIFIED. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27454 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: ZION REGION: 3 |NOTIFICATION DATE: 06/27/94 | |UNIT: [ ] [2] [ ] STATE: IL |NOTIFICATION TIME: 14:42 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 06/27/94 | +------------------------------------------------+EVENT TIME: 11:00[CDT]| |NRC NOTIFIED BY: KELLERHALS |LAST UPDATE DATE: 06/28/94 | |HQ OPS OFFICER: CHAUNCEY GOULD +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |RONALD GARDNER RDO | |AARC 50.72(b)(1)(v) OTHER ASMT/COMM INOP | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |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 +------------------------------------------------------------------------------+ | THE LICENSEE REPORTED THAT THEY HAD LOST THEIR PROCESS COMPUTER FOR >2HRS, | | THEREFORE RENDERING THE SPDS UNAVAILABLE FOR >2HRS. | | | | AT 09:00 THE COMPUTER FAILED AND THE MANAGEMENT INFORMATION SYSTEM | | PERSONNEL BEGAN IMMEDIATE TROUBLESHOOTING. THE PROCESS COMPUTER WAS RUNNING | | BETWEEN 11:02 AND 11:15 HRS, BUT THE SPDS WAS NOT VERIFIED OPERABLE DURING | | THIS TIME FRAME. THE PROCESS COMPUTER AGAIN WENT DOWN AT 11:15, BUT WAS | | RESTORED TO NORMAL OPERATION ALONG WITH SPDS AT 13:23. THEY ARE ALSO | | IDENTIFYING THAT THIS REPORT IS BEING MADE LATE SINCE THE ONE HOUR TIME | | LIMIT EXPIRED AT 12:00 CT SINCE THEY HAD NOT VERIFIED OPERABILITY OF SPDS. | | THE RI WAS INFORMED ALONG WITH THE STATE DEPARTMENT OF NUCLEAR SAFETY. | | | | *** UPDATE FROM BREEN TO HUFFMAN AT 2038 EDT ON 6/28/94 *** | | UPON INVESTIGATION OF THIS EVENT, IT WAS NOTED THAT A SIMILAR EVENT | | OCCURRED AT 0450 CDT ON 5/28/94. AT THAT TIME, THE PROCESS COMPUTER WAS | | LOST FOR GREATER THAN 2 HOURS RESULTING IN A LOSS OF THE SAFETY PARAMETER | | DISPLAY SYSTEM FOR GREATER THAN 2 HOURS. AT 1100 THAT SAME DAY, THE PROCESS | | COMPUTER AND SPDS WERE RESTORED BUT THE NEED FOR MAKING A 1 HOUR REPORT WAS | | NOT RECOGNIZED. THIS NOTIFICATION IDENTIFIES THAT DISCREPANCY. | | R3DO(GARDNER) HAS BEEN INFORMED. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27458 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: MILLSTONE REGION: 1 |NOTIFICATION DATE: 06/28/94 | |UNIT: [ ] [2] [ ] STATE: CT |NOTIFICATION TIME: 00:40 [ET]| |RX TYPE: [1] GE-3,[2] CE,[3] W-4-LP |EVENT DATE: 06/27/94 | +------------------------------------------------+EVENT TIME: 23:06[EDT]| |NRC NOTIFIED BY: OLECHWOWICZ |LAST UPDATE DATE: 06/28/94 | |HQ OPS OFFICER: GREG SCARFO +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |LAWRENCE DOERFLEIN 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 Y 100 POWER OPERATION | 100 POWER OPERATION | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | A CONTAINMENT PURGE ISOLATION OCCURRED WHEN A RADIATION MONITOR TRIPPED FOR | | UNKNOWN REASONS. | | | | WHILE PERFORMING A CONTAINMENT PURGE, RADIATION MONITOR "RM8240" TRIPPED ON | | A HIGH RADIATION CONDITION CAUSING A CONTAINMENT PURGE ISOLATION. NO HIGH | | RADIATION CONDITION EXISTED AT THE TIME OF THE ISOLATION. THE RADIATION | | MONITOR IN QUESTION HAS HAD A HISTORY OF FALSE HIGH-RADIATION TRIPS. THE | | CAUSE OF THE RADIATION MONITOR TRIP IS UNDER INVESTIGATION. THE LICENSEE | | INFORMED THE NRC RESIDENT INSPECTOR. STATE AND LOCAL AGENCIES WERE | | NOTIFIED. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27459 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: BEAVER VALLEY REGION: 1 |NOTIFICATION DATE: 06/28/94 | |UNIT: [1] [ ] [ ] STATE: PA |NOTIFICATION TIME: 12:50 [ET]| |RX TYPE: [1] W-3-LP,[2] W-3-LP |EVENT DATE: 06/28/94 | +------------------------------------------------+EVENT TIME: 10:42[EDT]| |NRC NOTIFIED BY: JIM DAUGHERTY |LAST UPDATE DATE: 06/28/94 | |HQ OPS OFFICER: WILLIAM HUFFMAN +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |LAWRENCE DOERFLEIN 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 N 0 COLD SHUTDOWN | 0 COLD SHUTDOWN | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | INADVERTENT AUTO-START OF RIVER WATER PUMP. | | | | RIVER WATER PUMP RW-P-1B AUTO-STARTED ON LOW PRESSURE DURING AN EQUIPMENT | | CLEARANCE EVOLUTION. PORTIONS OF THE RIVER WATER HEADER TO THE RECIRC SPRAY | | HEAT EXCHANGERS HAD BEEN ISOLATED AND DRAINED VIA A CLEARANCE FOR NORMAL | | OUTAGE MAINTENANCE WORK. DURING THE PROCESS OF LIFTING THE CLEARANCE AND | | TESTING VARIOUS VALVES, THE DRAINED RECIRC SPRAY HEADER WAS UNISOLATED AND | | REFILLED. THIS RESULTED IN A DROP IN THE RIVER WATER SYSTEM PRESSURE AND | | THE AUTO-START OF THE PUMP. | | | | ALL SYSTEMS FUNCTIONED AS DESIGNED AND NO OTHER OPERATIONAL PROBLEMS | | RESULTED FROM THE REPORTED EVENT. THE NRC RESIDENT INSPECTOR HAS BEEN | | INFORMED. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |OTHER NUCLEAR MATERIAL | |EVENT NUMBER: 27460 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |LICENSEE: WOODWARD CLYDE |NOTIFICATION DATE: 06/28/94 | | CITY: OVERLAND PARK REGION: 4 |NOTIFICATION TIME: 17:09 [ET]| | COUNTY: STATE: KS |EVENT DATE: 06/24/94 | |LICENSE#: 15-19109-01 AGREEMENT: Y |EVENT TIME: 12:00[CDT]| | DOCKET: |LAST UPDATE DATE: 06/28/94 | | +-----------------------------+ | |PERSON ORGANIZATION| | |CHARLES CAIN RDO | | | | +------------------------------------------------+ | |NRC NOTIFIED BY: TIM SMITH |RON GARDNER R3DO | |HQ OPS OFFICER: WILLIAM HUFFMAN | | +------------------------------------------------+ | |EMERGENCY CLASS: NOT APPLICABLE | | |10 CFR SECTION: | | |NDAM DAMAGE MEASURE GAUGE | | | | | | | | | | | | | | +------------------------------------------------+-----------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | DAMAGE TO TROXLER GAUGE REPORTED. | | | | THE WOODWARD CLYDE COMPANY OF OVERLAND PARK, KANSAS, REPORTED AN INCIDENT | | INVOLVING A TROXLER 34-40 MEASURING GAUGE. THE GAUGE CONTAINS .008 CURIES | | OF CS-137 AND .04 CURIES OF AM-241/BE. THE GAUGE WAS RUN OVER BY THE RUBBER | | TIRE OF A FRONT END LOADER AT A CONSTRUCTION SITE IN MARSHAL, MISSOURI. THE | | GAUGE WAS IN THE RETRACTED POSITION AT THE TIME AND NO DAMAGE TO THE SOURCE | | OR PERSONNEL OVEREXPOSURE OCCURRED. THERE WAS SOME DAMAGE TO THE PLASTIC | | HOUSING OF THE GAUGE. THE GAUGE WILL BE SHIPPED BACK TO TROXLER FOR | | REPAIRS. THE LICENSEE PLANS TO MAKE A FOLLOWUP NOTIFICATION TO THE REGION. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27461 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: PERRY REGION: 3 |NOTIFICATION DATE: 06/28/94 | |UNIT: [1] [ ] [ ] STATE: OH |NOTIFICATION TIME: 17:24 [ET]| |RX TYPE: [1] GE-6 |EVENT DATE: 06/28/94 | +------------------------------------------------+EVENT TIME: 15:00[EDT]| |NRC NOTIFIED BY: MIKE NEMCEK |LAST UPDATE DATE: 06/28/94 | |HQ OPS OFFICER: WILLIAM HUFFMAN +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |RONALD GARDNER RDO | |AINB 50.72(b)(2)(iii)(B) POT RHR INOP | | |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 N 0 COLD SHUTDOWN | 0 COLD SHUTDOWN | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | INADEQUATE SEATING TORQUE IN MOTOR OPERATED VALVES. | | | | DYNAMIC FLOW TESTING OF THE FUEL POOL COOLING AND CLEANUP SYSTEM WAS | | PERFORMED PER GENERIC LETTER 89-10 ON 6/24/94. PRELIMINARY REVIEW OF DATA | | FOR THE DEMINERALIZER INLET AND OUTLET VALVES, F-280/285/290/295 (BUTTERFLY | | MOV's), INDICATES SIGNIFICANTLY HIGHER THAN VENDOR PREDICTED SEATING | | TORQUES. | | | | THE DESIGN BASIS OF THE MOV'S IS TO CLOSE ON A LOCA SIGNAL OR SEISMIC | | EVENT. THE TESTING REVEALED THAT THE VALVES MAY NOT CLOSE UNDER DESIGN | | BASIS. A FOLLOW-UP LER WILL BE ISSUED. CORRECTIVE ACTIONS ARE STILL UNDER | | EVALUATION BUT WILL INCLUDE BOTH DESIGN AND PROCEDURAL CHANGES. THEY WILL | | BE COMPLETED BEFORE RESTART. | | | | THE NRC RESIDENT INSPECTOR HAS BEEN INFORMED. | | | | HOO NOTE: THE NAME OF THE VALVE VENDOR WAS NOT KNOWN BY THE INDIVIDUAL | | PROVIDING THE REPORT NOTIFICATION. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27462 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: SALEM REGION: 1 |NOTIFICATION DATE: 06/29/94 | |UNIT: [ ] [2] [ ] STATE: NJ |NOTIFICATION TIME: 05:33 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 06/29/94 | +------------------------------------------------+EVENT TIME: 04:39[EDT]| |NRC NOTIFIED BY: SERWAN |LAST UPDATE DATE: 06/29/94 | |HQ OPS OFFICER: GREG SCARFO +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |LAWRENCE DOERFLEIN RDO | |ARPS 50.72(b)(2)(ii) RPS ACTUATION | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | | | | | 2 | A/R Y 14 STARTUP | 0 HOT STANDBY | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | A REACTOR TRIP OCCURRED ON LOW STEAM GENERATOR (SG) LEVEL DURING A STARTUP | | FEEDWATER TRANSIENT. | | | | WITH THE UNIT AT APPROXIMATELY 14% POWER, SG "22" RECEIVED A FEEDWATER | | ISOLATION SIGNAL ON HIGH-HIGH SG WATER LEVEL (ABOUT 60%). A TURBINE TRIP | | WOULD'VE OCCURRED IF THE TURBINE WAS ONLINE. THIS RESULTED IN THE CLOSURE | | OF ALL FEEDWATER REGULATING VALVES, FEEDWATER BYPASS VALVES, AND FEEDWATER | | ISOLATION VALVES, AS WELL AS A TRIP OF THE ONLY OPERATING SG FEED PUMP. | | OPERATORS INSERTED RODS IN AN ATTEMPT TO REDUCE POWER TO A POINT WHERE THE | | AUXILIARY FEEDWATER SYSTEM (AFW) COULD SUPPORT LEVEL IN THE SGs (AFW WAS | | OPERATING BUT NOT SUPPLYING THE SGs). POWER WAS REDUCED FROM 14% TO | | APPROXIMATELY 7% WHEN WATER LEVEL IN SG "23" DROPPED TO THE LOW-LOW REACTOR | | TRIP SETPOINT OF 17%. A REACTOR TRIP SIGNAL WAS ISSUED AND ALL RODS FULLY | | INSERTED. WHEN THE STEAM DUMP SYSTEM ACTUATED, REACTOR COOLANT SYSTEM | | (RCS) TEMPERATURE DECREASED FROM 547 DEGREES F (NOT) TO 540 DEGREES F. AT | | 540 DEGREES F, OPERATORS CLOSED THE MAIN STEAM ISOLATION VALVES (MSIVs) PER | | THEIR EMERGENCY OPERATING PROCEDURES (EOPs) AND RCS TEMPERATURE RECOVERED. | | NO ECCS ACTUATIONS OR OTHER ESF ACTUATIONS OCCURRED. NO PORVs OR SAFETY | | VALVES LIFTED. ALL OTHER PLANT PARAMETERS REMAINED WITHIN THEIR EXPECTED | | BANDS. | | | | CURRENTLY, THE UNIT IS STABLE IN HOT STANDBY (MODE 3). AFW IS FEEDING THE | | SGs. THE ATMOSPHERIC DUMP VALVES ARE BEING UTILIZED TO DISSIPATE DECAY | | HEAT. OFFSITE POWER SUPPLIED ALL LOADS THROUGHOUT THE EVENT. ALL ECCS | | EQUIPMENT AND EMERGENCY DIESEL GENERATORS ARE OPERABLE. | | | | THE CAUSE OF THE FEEDWATER TRANSIENT IS DUE TO THE CHANGING STATE OF THE | | SGFP "21" RECIRCULATING VALVE. WITH THE FEEDWATER REGULATING VALVES IN | | AUTOMATIC, SG LEVEL SWINGS OCCURRED WHICH CAUSED SGFP "21" RECIRCULATING | | VALVE WENT CLOSED AT ONE POINT. THIS RESULTED IS ADDITIONAL FLOW THROUGH | | THE OPEN FEEDWATER REGULATING VALVES AND ENHANCED LEVEL IN ALL THE SGs. SG | | "23" HAD THE HIGHEST LEVEL PRIOR TO THE ADDITIONAL FLOW CONDITION AND | | REACHED ITS HIGH-HIGH LEVEL SETPOINT BEFORE OPERATORS COULD RESPOND. | | | | THE LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. LOWER ALLOWAYS CREEK | | TOWNSHIP WAS NOTIFIED. | +------------------------------------------------------------------------------+