U.S. Nuclear Regulatory Commission Operations Center Event Reports For 12/06/96 - 12/09/96 ** EVENT NUMBERS ** 31413 31414 31415 31416 31417 31418 31419 31420 31421 31422 31423 +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 31413 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: SEQUOYAH REGION: 2 |NOTIFICATION DATE: 12/06/96 | |UNIT: [ ] [2] [ ] STATE: TN |NOTIFICATION TIME: 02:26 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 12/06/96 | +------------------------------------------------+EVENT TIME: 00:33[EST]| |NRC NOTIFIED BY: MICHAEL MUNROE |LAST UPDATE DATE: 12/06/96 | |HQ OPS OFFICER: DOUG WEAVER +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |CHARLES HOSEY 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 | +-----+----------+-------+--------+-----------------+--------+-----------------+ | | | | | 2 | A/R Y 100 POWER OPERATION | 0 HOT STANDBY | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | REACTOR TRIP - LOSS OF TWO REACTOR COOLANT PUMPS (RCPs) | | | | "AT 0033 EDT, 12/6/96, UNIT 2 REACTOR TRIPPED AUTOMATICALLY FROM FULL POWER | | AS A RESULT OF LOSS OF POWER TO THE UNIT 2 6.9 KV UNIT BOARDS, RESULTING IN | | LOSS OF LOOP 1 AND 3 RCPs. THE REACTOR FIRST OUT ALARM WAS "RCP BUS 3 | | UNDER VOLTAGE CHANNEL III". | | | | "THE CAUSE FOR THE LOSS OF POWER TO THE 2A 6.9 KV START BUS, WHICH FEEDS | | THE 2A & 2C 6.9 KV UNIT BOARDS, HAS NOT BEEN DETERMINED AT THIS TIME. THE | | TRIP TEAM IS BEING ASSEMBLED TO INITIATE THE TRIP INVESTIGATION. | | | | "DUE TO LOSS OF POWER TO THE 2B 6.9 KV SHUTDOWN BOARD ALL FOUR EDGs | | STARTED, THE 2B D/G TIED ONTO THE 2B SHUTDOWN BOARD AND IS PRESENTLY | | CARRYING THAT LOAD. AS A RESULT OF THE BLACKOUT SIGNAL THE STANDBY 2B-B | | CENTRIFUGAL CHARGING PUMP, THERMAL BARRIER BOOSTER PUMP AND 2B COMPONENT | | COOLING WATER (PUMP) STARTED. ALSO, AS A RESULT OF THE REACTOR TRIP | | SIGNAL, ALL THREE AUX FEEDWATER PUMPS STARTED. | | | | "ALL SYSTEMS AND COMPONENTS OPERATED AS EXPECTED FOR THIS EVENT. THE RCS | | TEMPERATURE WENT TO 536øF FOLLOWING THE TRIP & THE RCS WAS BORATED IN | | ACCORDANCE WITH EMERGENCY PROCEDURES. UNIT 2 IS BEING MAINTAINED IN MODE 3 | | WITH RCS TEMPERATURE @ 547øF AND RCS TEMPERATURE AT 2235 PSIG." | | | | ALL RODS FULLY INSERTED. STEAM IS BEING DUMPED TO THE MAIN CONDENSER AS | | NECESSARY TO REMOVE DECAY HEAT. THE 2B EDG WILL CONTINUE TO SUPPLY IT'S | | SHUTDOWN BUS WHILE THE PROBLEM WITH THE START BUS IS INVESTIGATED. | | | | THE LICENSEE WILL INFORM THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 31414 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: LASALLE REGION: 3 |NOTIFICATION DATE: 12/06/96 | |UNIT: [1] [2] [ ] STATE: IL |NOTIFICATION TIME: 11:10 [ET]| |RX TYPE: [1] GE-5,[2] GE-5 |EVENT DATE: 12/06/96 | +------------------------------------------------+EVENT TIME: 09:10[CST]| |NRC NOTIFIED BY: GUY McCALLUM |LAST UPDATE DATE: 12/06/96 | |HQ OPS OFFICER: RUDY KARSCH +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |MONTE PHILLIPS 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 | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | N N 0 COLD SHUTDOWN | 0 COLD SHUTDOWN | | 2 | N N 0 REFUELING | 0 REFUELING | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | THE PROCESS COMPUTER TRIPPED DUE TO HIGH ROOM TEMPERATURE. | | | | THE PROCESS COMPUTER ROOM IS COOLED BY ONE OF TWO HVAC UNITS. ONE HVAC | | UNIT WAS OUT FOR MAINTENANCE WHEN THE REMAINING UNIT TRIPPED. THIS | | RESULTED IN ELEVATED ROOM TEMPERATURES. SUBSEQUENTLY THE PROCESS COMPUTER | | TRIPPED ON HIGH ROOM AMBIENT TEMPERATURE. THE LOSS OF THE PROCESS COMPUTER | | AFFECTS THE DATA COLLECTION AND DISPLAY OF PLANT EQUIPMENT, "A-MODEL | | REPORT", SPDS DISPLAY, AND GSEP ASSESSMENT CAPABILITY FROM ALL OFFSITE | | LOCATIONS. THE LICENSEE WILL INFORM THE STATE OF ILLINOIS AND THE NRC | | RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 31415 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: PERRY REGION: 3 |NOTIFICATION DATE: 12/06/96 | |UNIT: [1] [ ] [ ] STATE: OH |NOTIFICATION TIME: 13:02 [ET]| |RX TYPE: [1] GE-6 |EVENT DATE: 12/06/96 | +------------------------------------------------+EVENT TIME: 13:00[EST]| |NRC NOTIFIED BY: RUSS KEARNEY |LAST UPDATE DATE: 12/08/96 | |HQ OPS OFFICER: DICK JOLLIFFE +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |MONTE PHILLIPS 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 | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | N Y 100 POWER OPERATION | 100 POWER OPERATION | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | - EMERGENCY OPERATIONS FACILITY OUT OF SERVICE FOR MAINTENANCE ACTIVITIES - | | | | THE LICENSEE REMOVED THE EMERGENCY OPERATIONS FACILITY (EOF) FROM SERVICE | | TO PERFORM MAINTENANCE ACTIVITIES ON ELECTRICAL EQUIPMENT. A BACKUP EOF | | IS AVAILABLE, IF NEEDED. THE EOF IS EXPECTED TO BE RETURNED TO SERVICE AT | | 1200 ON 12/07/96. | | | | THE LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. | | | | * * * UPDATE AT 0938 EST ON 12/8/96 FROM MARK MLACHAK TO S. SANDIN * * * | | | | THE EOF IS AVAILABLE AS OF 0915 EST. THE LICENSEE WILL INFORM THE NRC | | RESIDENT INSPECTOR. THE HOO NOTIFIED R3DO (PHILLIPS). | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 31416 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: LIMERICK REGION: 1 |NOTIFICATION DATE: 12/06/96 | |UNIT: [1] [2] [ ] STATE: PA |NOTIFICATION TIME: 14:02 [ET]| |RX TYPE: [1] GE-4,[2] GE-4 |EVENT DATE: 12/05/96 | +------------------------------------------------+EVENT TIME: 14:30[EST]| |NRC NOTIFIED BY: DAVID NEFF |LAST UPDATE DATE: 12/06/96 | |HQ OPS OFFICER: DICK JOLLIFFE +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |GLENN MEYER 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 | | 2 | N Y 91 POWER OPERATION | 91 POWER OPERATION | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | - INSUFFICIENT GAS AVAILABLE TO OPERATE MSRVs FOR REMOTE S/D AFTER A FIRE - | | | | DURING A FLOW PATH STUDY VERIFICATION PERFORMED FOR THE LICENSEE THERMOLAG | | REDUCTION PROJECT, THE LICENSEE DETERMINED THAT CERTAIN EQUIPMENT THAT | | WOULD BE NEEDED TO PROVIDE DEPRESSURIZATION CONTROL OF THE REACTOR IN THE | | EVENT OF A FIRE REQUIRING REMOTE PLANT SHUTDOWN IS NOT PROTECTED. | | | | IN THE EVENT OF A SIGNIFICANT AREA WIDE FIRE IN THE MAIN CONTROL ROOM | | (MCR), THE AUXILIARY EQUIPMENT ROOM (AER), OR THE CABLE SPREADING ROOMS | | (CSRs), THE REMOTE PLANT SHUTDOWN METHOD WOULD BE UTILIZED TO ACHIEVE AND | | MAINTAIN SAFE SHUTDOWN OF BOTH UNITS 1 AND 2. THIS PLANT SHUTDOWN METHOD | | UTILIZES THREE MAIN STEAM RELIEF VALVES (MSRVs) FOR DEPRESSURIZATION | | CONTROL OF THE REACTOR. OPERATION OF THESE MSRVs REQUIRES PRIMARY | | CONTAINMENT INSTRUMENT GAS PRESSURE TO OPEN THE MSRVs. A LICENSEE | | EVALUATION WAS PERFORMED THAT CONCLUDED THAT THERE IS INSUFFICIENT GAS | | AVAILABLE FOLLOWING POSTULATED FIRE DAMAGE SUCH THAT OPERATION OF THE | | MSRVs MAY NOT BE AVAILABLE FOR THE PERIOD OF TIME NEEDED TO ACHIEVE COLD | | SHUTDOWN. | | | | AN HOURLY FIRE WATCH PATROL IS BEING UTILIZED AS A COMPENSATORY MEASURE | | UNTIL PROTECTED DEPRESSURIZATION CONTROL IS PROVIDED. PRIOR TO DISCOVERY | | OF THIS CONDITION, HOURLY FIRE WATCH PATROLS HAD BEEN ESTABLISHED IN THESE | | FIRE AREAS FOR INOPERABLE FIRE BARRIERS (i.e., THERMOLAG) AND THIS NEW | | CONCERN HAS BEEN ADDED TO THE REASON FOR THE HOURLY FIRE WATCH PATROL. | | | | EACH OF THE AFFECTED FIRE AREAS IS PROVIDED WITH FIRE DETECTION | | INSTRUMENTATION. THE MCR IS CONTINUALLY MANNED, WITH MANUAL FIRE | | SUPPRESSION EQUIPMENT AVAILABLE. AUTOMATIC FIRE SUPPRESSION EQUIPMENT IS | | PROVIDED IN THE AER AND THE CSRs. IN THE EVENT OF AN ACTUAL FIRE, OTHER | | METHODS OF DEPRESSURIZATION CONTROL OR OTHER SOURCES OF GAS/AIR PRESSURE | | COULD BE MADE AVAILABLE THROUGH THE USE OF EXISTING PROCEDURES TO ACHIEVE | | COLD SHUTDOWN. | | | | THE APPROPRIATE LICENSEE OPERATIONS DEPARTMENT PERSONNEL ARE BEING MADE | | AWARE OF THIS CONCERN. ACTIONS ARE BEING TAKEN TO PROVIDE AN ADEQUATELY | | PROTECTED GAS SUPPLY INCLUDING NECESSARY PROCEDURE CHANGES AND TRAINING. | | | | SINCE THE PROVISIONS OF THE LICENSEE FIRE PROTECTION PROGRAM WERE NOT | | MAINTAINED, THIS EVENT REPORT CONSTITUTES A NONCOMPLIANCE WITH FACILITY | | OPERATING LICENSE CONDITION #2.C.3 FOR UNITS 1 AND 2, REQUIRING A 24 HOUR | | NOTIFICATION TO THE NRC PER THE OPERATING LICENSES. | | | | THE LICENSEE PLANS TO SUBMIT AN LER ON THIS ISSUE. | | | | THE LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 31417 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: BROWNS FERRY REGION: 2 |NOTIFICATION DATE: 12/06/96 | |UNIT: [ ] [2] [3] STATE: AL |NOTIFICATION TIME: 13:42 [ET]| |RX TYPE: [1] GE-4,[2] GE-4,[3] GE-4 |EVENT DATE: 12/06/96 | +------------------------------------------------+EVENT TIME: 08:30[CST]| |NRC NOTIFIED BY: TERRY KNUETTEL |LAST UPDATE DATE: 12/06/96 | |HQ OPS OFFICER: DICK JOLLIFFE +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |CHARLES HOSEY RDO | |HFIT 26.73 FITNESS FOR DUTY | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | | | | | 2 | N Y 100 POWER OPERATION | 100 POWER OPERATION | | 3 | N Y 99 POWER OPERATION | 99 POWER OPERATION | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | A NONLICENSED PLANT EMPLOYEE SUPERVISOR TESTED POSITIVE FOR ALCOHOL | | DURING A RANDOM TEST. THE LICENSEE REVOKED THE EMPLOYEE'S SITE ACCESS | | AUTHORIZATION, SUSPENDED HIM FOR 14 DAYS, AND REFERRED HIM TO THE | | EMPLOYEE'S ASSISTANCE PROGRAM. SEE THE HOO LOG FOR DETAILS. | | | | THE LICENSEE WILL INFORM THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 31418 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: SEABROOK REGION: 1 |NOTIFICATION DATE: 12/06/96 | |UNIT: [1] [ ] [ ] STATE: NH |NOTIFICATION TIME: 15:51 [ET]| |RX TYPE: [1] W-4-LP |EVENT DATE: 12/06/96 | +------------------------------------------------+EVENT TIME: 15:30[EST]| |NRC NOTIFIED BY: PAUL FREEMAN |LAST UPDATE DATE: 12/06/96 | |HQ OPS OFFICER: DICK JOLLIFFE +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |GLENN MEYER 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 Y 100 POWER OPERATION | 100 POWER OPERATION | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | - FW LINE BREAK ACCIDENT ANALYSIS CONDITION OUTSIDE PLANT DESIGN BASIS - | | | | THE LICENSEE DISCOVERED A CONDITION THAT IS OUTSIDE THE DESIGN BASIS OF | | THE PLANT. THIS CONDITION, WHILE NOT SAFETY SIGNIFICANT, INVOLVES A | | DISCREPANCY IN THE UFSAR CHAPTER 15 ANALYSIS OF THE FEEDWATER LINE BREAK | | (FLB) ACCIDENT. | | | | SPECIFICALLY, THE FLB ACCIDENT ANALYSIS DOES NOT ACCOUNT FOR THE TIME | | ASSOCIATED WITH THE AUTOMATIC ISOLATION OF EMERGENCY FEEDWATER (EFW) FLOW | | TO THE FAULTED STEAM GENERATOR. THIS TIME IS APPROXIMATELY 20 SECONDS, | | WHICH WOULD DELAY THE DELIVERY OF EFW FLOW TO THE THREE INTACT STEAM | | GENERATORS BY THE TURBINE DRIVEN EFW PUMP. A LICENSEE QUALITATIVE | | ENGINEERING ASSESSMENT OF THIS CONDITION HAS CONCLUDED THAT THE EFFECT | | OF THIS CONDITION ON THE CONSEQUENCES OF THE FLB ACCIDENT ANALYSIS IS | | INCONSEQUENTIAL. | | | | THE LICENSEE IS CONTINUING TO INVESTIGATE THIS CONDITION. | | | | THE LICENSEE WILL INFORM THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 31419 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: LIMERICK REGION: 1 |NOTIFICATION DATE: 12/07/96 | |UNIT: [ ] [2] [ ] STATE: PA |NOTIFICATION TIME: 02:47 [ET]| |RX TYPE: [1] GE-4,[2] GE-4 |EVENT DATE: 12/06/96 | +------------------------------------------------+EVENT TIME: 23:37[EST]| |NRC NOTIFIED BY: PATON |LAST UPDATE DATE: 12/07/96 | |HQ OPS OFFICER: CHAUNCEY GOULD +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |GLENN MEYER 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 | +-----+----------+-------+--------+-----------------+--------+-----------------+ | | | | | 2 | M/R Y 90 POWER OPERATION | 0 HOT SHUTDOWN | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | REACTOR MANUALLY SCRAMMED FROM 90% POWER BECAUSE OF MAIN TURBINE HYDRAULIC | | OIL LEAK | | | | THE REACTOR WAS MANUALLY SCRAMMED FROM 90% POWER DUE TO AN EHC LEAK FROM | | THE #2 MAIN TURBINE CONTROL VALVE. THE LEAK WAS RECOGNIZED AFTER CONTROL | | ROOM PERSONNEL RECEIVED A CHANNEL "B" HALF SCRAM SIGNAL AND A LOW EHC | | RESERVOIR LEVEL ALARM. A MANUAL REACTOR SCRAM WAS INSERTED PRIOR TO | | RECEIVING AN EHC LOW PRESSURE SCRAM SIGNAL. ALL CONTROL RODS FULLY | | INSERTED, NO SAFETY/RELIEF VALVES LIFTED, AND NO ECCSs ACTUATED. FOLLOWING | | THE SCRAM, THE LEAK WAS ISOLATED, PERMITTING REACTOR PRESSURE CONTROL WITH | | THE TURBINE BYPASS VALVES. THE CAUSE OF THE LEAK WAS DUE TO SEPARATION OF | | 1/4" TUBING FROM THE OIL PRESSURE SWITCH. THE LICENSEE NOTIFIED THE NRC | | RESIDENT INSPECTOR, AND STATE AND LOCAL OFFICIALS, AND WILL ISSUE A PRESS | | RELEASE. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 31420 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: BIG ROCK POINT REGION: 3 |NOTIFICATION DATE: 12/07/96 | |UNIT: [1] [ ] [ ] STATE: MI |NOTIFICATION TIME: 13:26 [ET]| |RX TYPE: [1] GE-1 |EVENT DATE: 12/07/96 | +------------------------------------------------+EVENT TIME: 12:10[EST]| |NRC NOTIFIED BY: TOM MORT |LAST UPDATE DATE: 12/07/96 | |HQ OPS OFFICER: DICK JOLLIFFE +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |MONTE PHILLIPS 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 95 POWER OPERATION | 0 HOT SHUTDOWN | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | - AUTO Rx SCRAM DUE TO UNSTABLE MAIN GENERATOR FIELD GENERATOR CURRENT - | | | | WHILE THE PLANT WAS OPERATING AT 95% POWER, THE ELECTRICAL CURRENT TO | | THE AMPLIDYNE MAIN GENERATOR FIELD GENERATOR BECAME UNSTABLE FOR UNKNOWN | | REASONS. WHILE CONTROL ROOM OPERATORS WERE ATTEMPTING TO REMOVE THE MAIN | | GENERATOR FROM SERVICE, THE MAIN TURBINE TRIPPED OFF LINE. THE REACTOR | | AUTOMATICALLY SCRAMMED DUE TO HIGH FLUX ON CHANNELS 1 AND 2. 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 ROOT CAUSE OF THIS EVENT. | | | | THE LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 31421 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: SEQUOYAH REGION: 2 |NOTIFICATION DATE: 12/07/96 | |UNIT: [ ] [2] [ ] STATE: TN |NOTIFICATION TIME: 17:12 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 12/07/96 | +------------------------------------------------+EVENT TIME: 15:56[EST]| |NRC NOTIFIED BY: BILL HARRIS |LAST UPDATE DATE: 12/07/96 | |HQ OPS OFFICER: DICK JOLLIFFE +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |CHARLES HOSEY 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 +------------------------------------------------------------------------------+ | -MAIN FEEDWATER ISOLATION SIGNAL RECEIVED DURING PLANT RESTART PREPARATIONS | | | | AT 1556, WHILE PREPARING TO RESTART UNIT 2, MAINTENANCE TECHNICIANS WERE | | FILLING MAIN FEEDWATER HEATERS WHEN A LOW INJECTION WATER PRESSURE SIGNAL | | CAUSED BOTH NON-RUNNING MAIN FEEDWATER PUMPS TO RECEIVE A TRIP SIGNAL. THIS | | CAUSED THE TURBINE DRIVEN AUXILIARY FEEDWATER PUMP TO START, AS EXPECTED. | | | | AT 1638, THE LICENSEE RESET ALL SYSTEMS TO NORMAL. | | | | THE LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 31422 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: SAN ONOFRE REGION: 4 |NOTIFICATION DATE: 12/07/96 | |UNIT: [ ] [2] [3] STATE: CA |NOTIFICATION TIME: 20:40 [ET]| |RX TYPE: [1] W-3-LP,[2] CE,[3] CE |EVENT DATE: 12/07/96 | +------------------------------------------------+EVENT TIME: 13:40[PST]| |NRC NOTIFIED BY: ROBIN BAKER |LAST UPDATE DATE: 12/07/96 | |HQ OPS OFFICER: DICK JOLLIFFE +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |TOM STETKA 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 N 0 REFUELING | 0 REFUELING | | 3 | N Y 99 POWER OPERATION | 99 POWER OPERATION | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | -LICENSEE NOTIFIED STATE & LOCAL OFFICIALS OF AN OFFSITE CHEMICAL RELEASE- | | | | WHILE REGENERATING THE CIRCULATING WATER SYSTEM HIGH-FLOW MAKEUP | | DEMINERALIZER, TECHNICIANS DID NOT CLOSE THE WASTE NEUTRALIZATION TANK | | DRAIN VALVE. AS A RESULT, CAUSTIC AND ACIDIC CHEMICALS ADDED TO THE | | WASTE NEUTRALIZATION TANK DRAINED DIRECTLY TO THE PACIFIC OCEAN. | | | | THE LICENSEE NOTIFIED THE NRC RESIDENT INSPECTOR, THE STATE DEPARTMENT OF | | HEALTH SERVICES, THE REGIONAL WATER QUALITY BOARD AND WILL NOTIFY LOCAL | | OFFICIALS. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 31423 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: FERMI REGION: 3 |NOTIFICATION DATE: 12/07/96 | |UNIT: [2] [ ] [ ] STATE: MI |NOTIFICATION TIME: 22:48 [ET]| |RX TYPE: [2] GE-4 |EVENT DATE: 12/07/96 | +------------------------------------------------+EVENT TIME: 22:10[EST]| |NRC NOTIFIED BY: JOE SKLARCZYK |LAST UPDATE DATE: 12/07/96 | |HQ OPS OFFICER: DICK JOLLIFFE +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |MONTE PHILLIPS RDO | |ASHU 50.72(b)(1)(i)(A) PLANT S/D REQD BY TS | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 2 | N Y 5 STARTUP | 5 STARTUP | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | -TECH SPEC REQUIRED PLANT SHUTDOWN TO REPAIR SRV TAILPIPE PRESSURE SWITCH- | | | | WHILE PERFORMING TECH SPEC SURVEILLANCE TESTS OF THE SAFETY/RELIEF VALVES | | (SRVs), THE TAILPIPE PRESSURE SWITCH ON 1 OF 15 SRVs ('A' SRV) DID NOT | | PROVIDE POSITIVE "OPEN" INDICATION. POSITIVE "OPEN" INDICATION WAS | | VERIFIED BY OTHER PLANT PARAMETERS (BYPASS VALVE POSITION INDICATION AND | | MAIN STEAM LINE FLOW). THE LICENSEE DECLARED THE 'A' SRV INOPERABLE. | | | | TECH SPEC LCO A/S 3.3.7.5 REQUIRES THE LICENSEE TO REPAIR THE SRV POSITION | | INDICATION WITHIN 48 HOURS OR PLACE THE PLANT IN AT LEAST HOT SHUTDOWN | | CONDITION WITHIN THE NEXT 12 HOURS. | | | | THE LICENSEE BEGAN SHUTTING THE PLANT DOWN TO REPAIR THE VALVE. | | | | THE LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+