U.S. Nuclear Regulatory Commission Operations Center Event Reports For 04/03/96 - 04/04/96 ** EVENT NUMBERS ** 30185 30220 30227 30228 30229 30230 30231 +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 30185 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: TURKEY POINT REGION: 2 |NOTIFICATION DATE: 03/27/96 | |UNIT: [3] [ ] [ ] STATE: FL |NOTIFICATION TIME: 18:16 [ET]| |RX TYPE: [3] W-3-LP,[4] W-3-LP |EVENT DATE: 03/27/96 | +------------------------------------------------+EVENT TIME: 17:15[EST]| |NRC NOTIFIED BY: ADAMSON |LAST UPDATE DATE: 04/03/96 | |HQ OPS OFFICER: BOB STRANSKY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |BELISLE 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 | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 3 | M/R Y 100 POWER OPERATION | 0 HOT STANDBY | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | MANUAL REACTOR TRIP DUE TO LOSS OF FEEDWATER PUMP | | | | DURING PROTECTIVE RELAY TESTING ON THE ALTERNATE FEEDER BREAKER FOR | | 4160-VAC BUS '3C', A BUS LOCKOUT OCCURRED RESULTING IN THE TRIP OF THE '3B' | | STEAM GENERATOR FEEDWATER PUMP. AN AUTOMATIC MAIN TURBINE RUNBACK OCCURRED | | IN RESPONSE TO THE LOSS OF THE FEEDWATER PUMP. OPERATORS MANUALLY TRIPPED | | THE REACTOR DUE TO DECREASING STEAM GENERATOR WATER LEVELS AT APPROXIMATELY | | 25% NARROW RANGE LEVEL. ALL CONTROL RODS INSERTED FOLLOWING THE REACTOR | | TRIP, AND ALL SYSTEMS FUNCTIONED AS EXPECTED. THE AUXILIARY FEEDWATER | | SYSTEM AUTOMATICALLY ACTUATED DUE TO LOW STEAM GENERATOR WATER LEVELS. NO | | PRIMARY OR SECONDARY RELIEF VALVES LIFTED DURING THE EVENT. | | | | THE PLANT IS STABLE IN MODE 3 WITH DECAY HEAT BEING EXHAUSTED TO THE MAIN | | CONDENSER. THE LICENSEE INTENDS TO RESTART THE UNIT TOMORROW. THE NRC | | RESIDENT INSPECTOR HAS BEEN INFORMED BY THE LICENSEE. | | | | * * * 1335 APRIL 3, 1996, UPDATE FROM KNORR TAKEN BY TROCINE * * * | | | | THE LICENSEE REPORTED A CLARIFICATION TO THIS EVENT SCENARIO. THERE WAS NO | | AUTOMATIC MAIN TURBINE RUNBACK DURING THIS EVENT. A MANUAL TURBINE RUNBACK | | WAS ATTEMPTED AND DID OCCUR JUST PRIOR TO THE MANUAL TRIP. | | | | THE NRC OPERATIONS CENTER NOTIFIED THE R2DO (URYC). | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |FUEL CYCLE FACILITY | |EVENT NUMBER: 30220 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: NUCLEAR FUEL SERVICES INC. |NOTIFICATION DATE: 04/02/96 | | RXTYPE: URANIUM FUEL FABRICATION |NOTIFICATION TIME: 12:52 [ET]| |COMMENTS: HEU CONVERSION & SCRAP RECOVERY |EVENT DATE: 04/02/96 | | NAVAL REACTOR FUEL CYCLE |EVENT TIME: 12:26[EST]| | LEU SCRAP RECOVERY |LAST UPDATE DATE: 04/03/96 | | CITY: ERWIN REGION: 2 +-----------------------------+ | COUNTY: UNICOI STATE: TN |PERSON ORGANIZATION| |LICENSE#: SNM-124 AGREEMENT: Y |BRUNO URYC RDO | | DOCKET: 07000143 |JOHN LINEHAN, NMSS EO | +------------------------------------------------+HOWARD EARL FEMA | |NRC NOTIFIED BY: WAYNE PHILLIPS |KEVIN MOORE DOE | |HQ OPS OFFICER: LEIGH TROCINE |CHECKAN EPA | +------------------------------------------------+JIM RAAB HHS | |EMERGENCY CLASS: SITE AREA EMERGENCY | | |10 CFR SECTION: | | |AAEC 50.72(a)(1)(i) EMERGENCY DECLARED | | |KBAD 70.50(b)(1)(ii) MATL >5X LOWEST LIMIT | | |KBDA 70.50(b)(4)(i) FIRE/EXP INVOLV LNM | | |NOCM COMM ASST BRIEF | | | | | +------------------------------------------------+-----------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | DECLARATION OF A SITE AREA EMERGENCY DUE TO A FIRE EXCEEDING 15 MINUTES, A | | BREECH OF CONTAINMENT, AND THE POTENTIAL FOR A RADIOACTIVE RELEASE | | | | AT 1226, THE LICENSEE DECLARED A SITE AREA EMERGENCY DUE TO A FIRE THAT WAS | | NOT EXTINGUISHED WITHIN 15 MINUTES, A BREECH IN CONTAINMENT, AND THE | | POTENTIAL FOR A RADIOACTIVE RELEASE. THE FIRE WAS DETECTED IN THE #302 | | INCINERATOR ROOM. IT SPREAD TO THE DUCTING ON THE ROOF AND BREECHED THE | | DUCTING. AT THE TIME OF THIS NOTIFICATION, THE FIRE WAS UNDER CONTROL, AND | | IT WAS EXTINGUISHED BY 1255 (DURING THIS NOTIFICATION). THE INCINERATOR | | WAS BURNING RADIOACTIVE MATERIAL AT THE TIME SO THE POTENTIAL EXISTED FOR A | | RADIOLOGICAL RELEASE. THE LICENSEE DETERMINED THAT THERE WAS A MAXIMUM OF | | 800 GRAMS OF HIGH ENRICHED URANIUM AVAILABLE FOR RELEASE AND IS CURRENTLY | | PERFORMING EVALUATIONS TO DETERMINE A MORE ACCURATE QUANTITY. (IT WAS | | LATER DETERMINED THAT THERE WAS APPROXIMATELY 50 GRAMS OF 90% ENRICHED | | URANIUM AVAILABLE FOR POSSIBLE RELEASE.) AT THE TIME OF THIS NOTIFICATION, | | THE WIND WAS BLOWING OUT OF THE SOUTH (AWAY FROM THE LOCAL POPULATION | | CENTER) AT A SPEED OF THREE TO FIVE MILES PER HOUR. OFFSITE EVACUATION WAS | | NOT RECOMMENDED. THE LOCAL FIRE DEPARTMENT AND LOCAL LAW ENFORCEMENT | | REPRESENTATIVES RESPONDED TO THE SITE TO ASSIST ONSITE EMERGENCY RESPONSE | | PERSONNEL. | | | | IN ADDITION TO THE NOTIFICATIONS REFERENCED AT THE TOP OF THIS FORM, THE | | NRC OPERATIONS CENTER NOTIFIED THE USDA (KECIA COOPER). | | | | * * * 1345 APRIL 2, 1996, NRC UPDATE TAKEN BY BAILEY * * * | | | | AT 1345 ON APRIL 2, 1996, THE NRC ENTERED THE MONITORING PHASE OF NORMAL | | OPERATIONS. | | | | * * * 1445 APRIL 2, 1996, COMMISSIONERS' ASSISTANTS BRIEFING * * * | | | | AT 1445 ON APRIL 2, 1996, A COMMISSIONERS' ASSISTANTS BRIEFING WAS | | CONDUCTED IN ORDER TO DISCUSS THE ONGOING SITE AREA EMERGENCY. THE | | FOLLOWING BRIEFING NOTIFICATIONS WERE MADE (*INDICATES OFFICE DID NOT | | PARTICIPATE): AEOD (JORDAN, ROSS, AND CONGEL), ERB (BARRETT AND BAILEY), | | CHAIRMAN JACKSON (BOYLE AND JOHNSON), COMMISSIONER ROGERS (COPLAN), | | COMMISSIONER DICUS (LUBENAU), EDO (THOMPSON), NMSS EO (COOL), PAO | | (BEECHER), CAO (KEELING), SECY (HART), STATE PROGRAMS (BANGART), IP | | (*UPSHAW), BRIEFER (REYES), AND OTHERS (PAPERIELLO, BRACH, TENECK, GREEVES, | | TROSKOSKI, AND THE PROTECTIVE MEASURES TEAM). | | | | THE FOLLOWING IS A SUMMARY OF COMMISSIONERS' ASSISTANTS BRIEFING: | | | | THE FIRE IN THE INCINERATOR BUILDING WAS DETECTED AT 1158. THE LICENSEE | | DECLARED THE SITE AREA EMERGENCY AT 1226, AND THE FIRE WAS EXTINGUISHED AT | | APPROXIMATELY 1230. THE FIRE DAMAGE TO THE ROOF VENTILATION DUCTING WAS IN | | AN AREA APPROXIMATELY 40 FEET LONG. THE LICENSEE NOTIFIED THE STATE OF | | TENNESSEE, AND THE STATE'S INDEPENDENT AIR SAMPLING SYSTEM WAS ACTIVATED AT | | APPROXIMATELY 1340. THE STATE ALSO DISPATCHED FOUR REPRESENTATIVES TO | | PERFORM RELEASE ASSESSMENTS. THE NRC DISPATCHED A REGIONAL MANAGER, TWO | | REGIONAL RADIATION SPECIALISTS, AND A HEADQUARTERS PROJECT MANAGER TO THE | | SITE. THE NRC ALSO ENTERED THE MONITORING PHASE OF NORMAL OPERATIONS AT | | 1345. THE LICENSEE HAS ESTIMATED THAT THE WORST CASE POTENTIAL RELEASE | | COULD HAVE BEEN UP TO 200 GRAMS OF URANIUM-235, AND THE LICENSEE'S | | ANALYTICAL CALCULATIONS SHOW THAT THERE COULD BE UP TO A 3 MILLIREM | | EXPOSURE AT A DISTANCE OF 1 MILE DOWN WIND. THE LICENSEE HAS LOCKED DOWN | | ITS FACILITY AND HAS PERFORMED NASAL SWIPES FOR THE RESPONDERS TO THE FIRE. | | THE RESULTS ARE CURRENTLY PENDING. THE LICENSEE DOWNGRADED ITS EMERGENCY | | CLASSIFICATION TO UNUSUAL EVENT AT 1450 BECAUSE THE FIRE WAS EXTINGUISHED | | AND UNDER CONTROL AND BECAUSE THE SITUATION DOES NOT APPEAR TO BE AS | | SEVERE. | | | | * * * 1518 APRIL 2, 1996, UPDATE FROM PHILLIPS RECEIVED BY BAILEY * * * | | | | THE LICENSEE DOWNGRADED ITS EMERGENCY CLASSIFICATION TO UNUSUAL EVENT AT | | 1450. THE LICENSEE ALSO NOTIFIED FEMA, ANI, AND THE STATE OF TENNESSEE OF | | THIS CHANGE IN CLASSIFICATION. THE NRC OPERATIONS CENTER NOTIFIED THE R2DO | | (URYC), NMSS EO (COOL), FEMA (EARL), DOE (MOORE AND SCHMIT), EPA (CHECKAN), | | HHS (RAAB), USDA (COOPER), AND ARAC. | | | | * * * 1700 APRIL 2, 1996, NRC UPDATE TAKEN BY TROCINE * * * | | | | THE NRC TERMINATED THE MONITORING PHASE OF NORMAL OPERATIONS AT 1700 ON | | APRIL 2, 1996. | | | | * * * 1530 APRIL 3, 1996, COMMISSIONERS' ASSISTANTS BRIEFING * * * | | | | AT 1530 ON APRIL 3, 1996, A SECOND COMMISSIONERS' ASSISTANTS BRIEFING WAS | | CONDUCTED. THE FOLLOWING BRIEFING NOTIFICATIONS WERE MADE (*INDICATES | | OFFICE DID NOT PARTICIPATE): AEOD (*ROSS AND *CONGEL), ERB (BAILEY), | | CHAIRMAN JACKSON (*BOYLE), COMMISSIONER ROGERS (FLEISHMAN), COMMISSIONER | | DICUS (MARKLEY), EDO (STABLEIN), NMSS EO (COOL AND BRACH), RDO (*URYC), PAO | | (BEECHER AND GILLILAND), CAO (KEELING), SECY (HART), STATE (*BANGART), | | BRIEFER (COLLINS), AND OTHERS (EBNETER, MALLETT, GREEVES, PIERSON, KANE, | | TROSKOSKI, AND STOUT). | | | | THE FOLLOWING IS A SUMMARY OF THE COMMISSIONERS' ASSISTANTS BRIEFING: | | | | A REGIONAL MANAGER, TWO REGIONAL RADIATION SPECIALISTS, AND A HEADQUARTERS | | PROJECT MANAGER ARE CURRENTLY ONSITE; AND THEY EXPECT TO BE JOINED BY A | | FIRE PROTECTION SPECIALIST FROM HEADQUARTERS LATER TODAY. THE TEAM WAS | | ALSO GIVEN AN AUGMENTED INSPECTION TEAM CHARTER TODAY. IN ADDITION, THE | | NRC ISSUED A CONFIRMATORY ACTION LETTER THIS AFTERNOON TO REQUIRE THE | | LICENSEE TO MAINTAIN THE SYSTEM DOWN UNTIL THE LICENSEE FINISHES ITS | | INVESTIGATION AND MEETS WITH THE NRC TO DISCUSS THE RESULTS AND CORRECTIVE | | ACTIONS. THE NRC PLANS TO HOLD A PRESS CONFERENCE WHEN THE AUGMENTED | | INSPECTION TEAM HAS COMPLETED ITS INVESTIGATION. THERE HAS BEEN MEDIA | | INTEREST IN THIS EVENT. | | | | THE CAUSE OF THE FIRE IS STILL UNDER INVESTIGATION. APPARENTLY, THE | | LICENSEE HAS JUST SHUT THE INCINERATION SYSTEM DOWN WHEN THE FIRE WAS | | IDENTIFIED. THE FIRE DAMAGED APPROXIMATELY 150 FEET OF VENTILATION DUCTING | | ON THE ROOF, AND THE DAMAGE APPEARED TO BE MOSTLY DOWN STREAM OF A BLOWER | | SYSTEM THAT IS ON THE ROOF WITH THE PORTION CLOSEST TO THE FAN HAVING THE | | MOST DAMAGE. THERE DID NOT APPEAR TO BE ANY DAMAGE TO THE PORTION OF THE | | SYSTEM THAT GOES FROM THE INCINERATOR THROUGH A SCRUBBER WHICH IS LOCATED | | INSIDE THE BUILDING, OUT A VENTILATION DUCT, UP THROUGH THE ROOF, AND OVER | | TO THE BLOWER. THE LATEST MEASUREMENTS INDICATE THAT THE AMOUNT OF | | MATERIAL INVOLVED WAS APPROXIMATELY 8 GRAMS IN THE VENTILATION SYSTEM AND | | APPROXIMATELY 45 GRAMS IN THE ACTUAL BURN. | | | | THE RESULTS FROM AIR SAMPLES TAKEN DURING AND SHORTLY AFTER THE EVENT AND | | SURVEYS FOR CONTAMINATION ONSITE INDICATED NOTHING UNUSUAL, AND THERE DID | | NOT APPEAR TO BE ANY SPREAD OF CONTAMINATION FROM THE DUCTING SYSTEM. IN | | ADDITION, THE RESULTS OF THE NASAL SMEARS, URINE SAMPLES, AND LUNG COUNTS | | ON THE FIRE RESPONSE PERSONNEL THUS FAR HAVE BEEN NEGATIVE. THE DIRECT | | RADIATION SURVEYS ON THE INDIVIDUALS WHO FOUGHT THE FIRE ALSO SHOWED NO | | CONTAMINATION OF THE INDIVIDUALS. THE LICENSEE CURRENTLY PLANS TO CONTINUE | | PERFORMING LUNG COUNTS UNTIL EVERYONE THAT WAS INVOLVED IS COUNTED. | | | | THE TENNESSEE RADIOLOGICAL HEALTH DEPARTMENT REPRESENTATIVES PERFORMED | | SURVEYS AND TOOK SAMPLES OF SOIL AND VEGETATION DOWN WIND OF THE FIRE. THE | | LICENSEE SPLIT SAMPLES WITH THE STATE SO THAT BOTH CAN RUN SAMPLES FOR | | COMPARISON. THE LICENSEE HAS ALSO TAKEN SAMPLES OF SOIL AND VEGETATION IN | | THE AREAS WHERE SAMPLES ARE NORMALLY TAKEN TO SEE IF THERE IS ANY | | INDICATION OF IMPACT IN THOSE AREAS. IN ADDITION, THE LICENSEE'S | | ENVIRONMENTAL MANAGER HAS PUT TOGETHER AN AUGMENTED SAMPLING PLAN WHICH | | WILL BE TAKING ADDITIONAL SOIL AND VEGETATION SAMPLES AND WILL PERHAPS | | PERFORM SOME SURVEYS IN DOWN STREAM LOCATIONS. | | | | NOTE: THE LICENSEE TERM 'UNUSUAL EVENT' IS NOT AN OFFICIAL EMERGENCY | | CLASSIFICATION. THE EMERGENCY CLASSIFICATION WAS TERMINATED WHEN THE | | LICENSEE ENTERED THE UNUSUAL EVENT AT 1450 ON APRIL 2, 1996. THE NRC | | OPERATIONS CENTER NOTIFIED THE R2DO (URYC), NMSS EO (LINEHAN), FEMA | | (SULLIVAN), DOE (JOHNSON), EPA (PETTIFORD), HHS (RAAB), AND USDA | | (BICKERTON). | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |OTHER NUCLEAR MATERIAL | |EVENT NUMBER: 30227 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |LICENSEE: KNIGHT CONSULTING ENGINEERS |NOTIFICATION DATE: 04/03/96 | | CITY: WILLISTON REGION: 1 |NOTIFICATION TIME: 10:02 [ET]| | COUNTY: CHITTENDEN STATE: VT |EVENT DATE: 04/03/96 | |LICENSE#: AGREEMENT: N |EVENT TIME: 08:30[EST]| | DOCKET: |LAST UPDATE DATE: 04/03/96 | | +-----------------------------+ | |PERSON ORGANIZATION| | |GRAY RDO | | | | +------------------------------------------------+ | |NRC NOTIFIED BY: R. LUNDGREN | | |HQ OPS OFFICER: BOB STRANSKY | | +------------------------------------------------+ | |EMERGENCY CLASS: NOT APPLICABLE | | |10 CFR SECTION: | | |NINF INFORMATION ONLY | | | | | | | | | | | | | | +------------------------------------------------+-----------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | A TROXLER MODEL 3401 MOISTURE DENSITY GAUGE WAS DAMAGED WHEN A DUMP TRUCK | | BACKED OVER IT AT A CONSTRUCTION SITE. THE CALLER REPORTED THAT THE CASE | | WAS DAMAGED BUT THAT THE SOURCE ROD WAS STILL IN ITS LOCKED POSITION AND | | APPEARED TO BE UNDAMAGED. THE CALLER REPORTED THAT HIS SURVEY METER WAS | | BEING CALIBRATED AND THAT HE HAD SECURED THE AREA AROUND THE DAMAGED GAUGE | | UNTIL HE IS ABLE TO OBTAIN A METER AND PERFORM A SURVEY OF THE AREA. THE | | CALLER PLANNED TO CONTACT REGION 1 REGARDING THIS EVENT. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 30228 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: PILGRIM REGION: 1 |NOTIFICATION DATE: 04/03/96 | |UNIT: [1] [ ] [ ] STATE: MA |NOTIFICATION TIME: 13:17 [ET]| |RX TYPE: [1] GE-3 |EVENT DATE: 04/03/96 | +------------------------------------------------+EVENT TIME: 12:30[EST]| |NRC NOTIFIED BY: KEN GRACIA |LAST UPDATE DATE: 04/03/96 | |HQ OPS OFFICER: LEIGH TROCINE +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |HAROLD GRAY 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 +------------------------------------------------------------------------------+ | REACTOR CORE ISOLATION COOLING DECLARED INOPERABLE BUT AVAILABLE FOLLOWING | | THE REVIEW OF QUARTERLY SURVEILLANCE DATA | | | | AFTER REVIEWING REACTOR CORE ISOLATION COOLING QUARTERLY SURVEILLANCE TEST | | DATA AND COMPUTER TRACES, THE LICENSEE NOTED OSCILLATIONS ON THE FLOW | | CONTROLLER WHEN IT WAS IN AUTOMATIC CONTROL. HIGH DISCHARGE PRESSURE WAS | | ALSO NOTED. AS A RESULT, THE LICENSEE DECLARED THE REACTOR CORE ISOLATION | | COOLING SYSTEM INOPERABLE (BUT AVAILABLE) AT 1230. THIS PLACED THE UNIT IN | | A 14-DAY TECHNICAL SPECIFICATION LIMITING CONDITION FOR OPERATION. ALL | | OTHER EMERGENCY CORE COOLING SYSTEMS ARE CURRENTLY AVAILABLE. | | | | THE LICENSEE IS CURRENTLY TROUBLESHOOTING THE FLOW CONTROLLER AND PLANS TO | | PERFORM THE SURVEILLANCE AGAIN LATER TODAY. THE LICENSEE NOTIFIED THE NRC | | RESIDENT INSPECTOR AND PLANS TO NOTIFY THE STATE. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 30229 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: MILLSTONE REGION: 1 |NOTIFICATION DATE: 04/03/96 | |UNIT: [ ] [ ] [3] STATE: CT |NOTIFICATION TIME: 14:09 [ET]| |RX TYPE: [1] GE-3,[2] CE,[3] W-4-LP |EVENT DATE: 04/03/96 | +------------------------------------------------+EVENT TIME: 13:55[EST]| |NRC NOTIFIED BY: DAVID McDANIEL |LAST UPDATE DATE: 04/03/96 | |HQ OPS OFFICER: LEIGH TROCINE +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |HAROLD GRAY RDO | |AIND 50.72(b)(2)(iii)(D) ACCIDENT MITIGATION | | |AINB 50.72(b)(2)(iii)(B) POT RHR INOP | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | | | | | | | | | 3 | N N 0 COLD SHUTDOWN | 0 COLD SHUTDOWN | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | DISCOVERY THAT THE RECIRCULATION SPRAY SYSTEM (RSS) MAY BE EXPOSED TO | | HIGHER TEMPERATURES THAN DESIGNED FOLLOWING A DESIGN BASIS ACCIDENT | | | | THE FOLLOWING IS A PORTION OF A FACSIMILE PROVIDED BY THE LICENSEE: | | | | "AN ENGINEERING REVIEW INDICATES THAT THE RSS (DESIGNED FOR 150 DEGREES | | FAHRENHEIT) MAY SEE SIGNIFICANTLY HIGHER TEMPERATURES FOLLOWING A LOCA, | | WHICH MAY RESULT IN SUPPORT STRESSES ABOVE ASME III, APPENDIX F, ALLOWABLE | | STRESSES FOR ONE-TIME FAULTED CONDITION. | | | | "A LOSS OF SERVICE WATER TO ONE OR TWO RSS HEAT EXCHANGERS AND AN AUTOMATIC | | START OF THE RSS PUMPS AT APPROXIMATELY 11 MINUTES WOULD RESULT IN A HIGHER | | THAN ANALYZED TEMPERATURE RECIRCULATION FLOW FROM THE SUMP TO THE RSS | | HEADERS DOWNSTREAM OF THE HEAT EXCHANGERS. | | | | "IT IS NOT APPARENT THAT OPERATORS WOULD HAVE CLEAR, UNAMBIGUOUS | | INDICATION, OR PROCEDURAL REQUIREMENTS TO ISOLATE THE RSS HEADERS TO | | PREVENT A FAULTED CONDITION." (END OF TEXT) | | | | THE UNIT IS NOT CURRENTLY IN ANY TECHNICAL SPECIFICATION LIMITING | | CONDITIONS FOR OPERATION AS A RESULT OF THIS CONDITION BECAUSE IT WAS | | DISCOVERED WHILE THE UNIT WAS IN A COLD SHUTDOWN CONDITION. TEMPERATURES | | AS HIGH AS 200øF TO 250øF MAY OCCUR. | | | | THE LICENSEE NOTIFIED THE NRC RESIDENT INSPECTOR AND THE APPROPRIATE STATE | | AND LOCAL AUTHORITIES. THE LICENSEE ALSO PLANS TO ISSUE A PRESS RELEASE. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 30230 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: WATTS BAR REGION: 2 |NOTIFICATION DATE: 04/03/96 | |UNIT: [1] [ ] [ ] STATE: TN |NOTIFICATION TIME: 18:58 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 04/03/96 | +------------------------------------------------+EVENT TIME: 17:00[EST]| |NRC NOTIFIED BY: EDWARD O. GAMBILL |LAST UPDATE DATE: 04/03/96 | |HQ OPS OFFICER: LEIGH TROCINE +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |BRUNO URYC RDO | |AIND 50.72(b)(2)(iii)(D) ACCIDENT MITIGATION | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | N Y 47 POWER OPERATION | 47 POWER OPERATION | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | POTENTIAL FOR THE LOSS AUTOMATIC CONTROL OF THE ANNULUS VACUUM FOR A PERIOD | | OF TIME UNTIL THE SETPOINT FOR RE-ENABLING THE INITIAL EMERGENCY GAS | | TREATMENT TRAIN IS REACHED | | | | AS A RESULT OF AN ENGINEERING REVIEW, THE LICENSEE DETERMINED THAT, UNDER | | INITIAL LOSS OF COOLANT ACCIDENT CONDITIONS, THE EMERGENCY GAS TREATMENT | | SYSTEM MAY NOT BE CAPABLE OF FULFILLING ITS SAFETY FUNCTION FOR A PERIOD OF | | TIME UNDER THE WORST CASE SINGLE FAILURE CONDITIONS. THIS SYSTEM IS USED | | TO KEEP AIR PRESSURE IN THE SHIELD BUILDING BELOW ATMOSPHERIC PRESSURE AT | | ALL TIMES AND TO PROCESS AIR THROUGH THE HEPA FILTERS PRIOR TO RELEASE TO | | THE ATMOSPHERE DURING ACCIDENT CONDITIONS. | | | | IN THE EVENT OF A LOSS OF COOLANT ACCIDENT, THE INITIAL PRESSURE RESPONSE | | IN THE ANNULUS MAY CAUSE THE SETPOINT FOR SWAP OVER FROM THE TRAIN IN | | "AUTO" TO THE TRAIN IN "STANDBY" TO BE EXCEEDED BEFORE CONTROL IS | | ESTABLISHED. IF THE STANDBY TRAIN WERE TO SUFFER A SINGLE FAILURE, | | AUTOMATIC CONTROL OF THE ANNULUS VACUUM WOULD BE LOST FOR A PERIOD OF TIME | | UNTIL THE SETPOINT FOR RE-ENABLING THE INITIAL (AUTO) TRAIN IS REACHED. | | PRELIMINARY CALCULATIONS INDICATE THAT THERE WOULD NOT BE AN IMPACT ON | | CONTROL ROOM OR OFFSITE DOSES WITH EXISTING CONTAINMENT LEAKAGE FIGURES. | | | | THE UNIT ENTERED A 7-DAY LIMITING CONDITION FOR OPERATION PER THE ACTION | | STATEMENT FOR TECHNICAL SPECIFICATION 3.6.9 AT 1155 ON APRIL 2, 1996, AND A | | DESIGN CHANGE TO MODIFY THE SETPOINT FOR SWAP OVER IS BEING PREPARED. THE | | LICENSEE MADE THE DECISION TO REPORT THIS EVENT AT 1700 TODAY (APRIL 3, | | 1996). | | | | THE LICENSEE NOTIFIED THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 30231 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: BROWNS FERRY REGION: 2 |NOTIFICATION DATE: 04/03/96 | |UNIT: [ ] [2] [ ] STATE: AL |NOTIFICATION TIME: 19:05 [ET]| |RX TYPE: [1] GE-4,[2] GE-4,[3] GE-4 |EVENT DATE: 04/03/96 | +------------------------------------------------+EVENT TIME: 16:16[CST]| |NRC NOTIFIED BY: RAY SWAFFORD |LAST UPDATE DATE: 04/03/96 | |HQ OPS OFFICER: LEIGH TROCINE +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |BRUNO URYC 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 REFUELING | 0 REFUELING | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | ENGINEERED SAFETY FEATURE (ESF) ACTUATION DUE TO A SPURIOUS HIGH DRYWELL | | SIGNAL IN THE CORE SPRAY LOGIC WHILE THE UNIT WAS IN REFUELING | | | | AT 1616 CST, UNIT 2 RECEIVED AN ESF ACTUATION DUE TO A SPURIOUS HIGH | | DRYWELL SIGNAL IN THE CORE SPRAY LOGIC. THERE WAS NO EXISTING HIGH DRYWELL | | CONDITION AT THE TIME. AS A RESULT OF THIS ACTUATION SIGNAL, ALL EIGHT | | EMERGENCY DIESEL GENERATORS AUTOMATICALLY STARTED BUT DID NOT TIE ONTO | | THEIR RESPECTIVE 4-KV SHUTDOWN BOARDS. IN ADDITION, EMERGENCY EQUIPMENT | | COOLING WATER PUMPS "B3" AND "C3", RESIDUAL HEAT REMOVAL (RHR) PUMP "2D" | | AND ALL FOUR CORE SPRAY PUMPS AUTOMATICALLY STARTED. THE "A3" AND "D3" | | EMERGENCY EQUIPMENT COOLING WATER PUMPS WERE ALREADY RUNNING, AND RHR PUMP | | "2B" WAS ALREADY RUNNING TO SUPPORT SHUTDOWN COOLING. RHR PUMPS "2A" AND | | "2C" WERE TAGGED OUT OF SERVICE TO SUPPORT MAINTENANCE ACTIVITIES. | | | | ALL SYSTEMS RESPONDED AS REQUIRED, AND THERE WAS NO INJECTION TO THE | | VESSEL. THERE WAS ALSO NO LOSS OF SHUTDOWN COOLING. THE ACTUAL CAUSE OF | | THE SPURIOUS SIGNAL IS CURRENTLY UNDER INVESTIGATION. | | | | THE LICENSEE NOTIFIED THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+