U.S. Nuclear Regulatory Commission Operations Center Event Reports For 12/19/94 - 12/20/94 ** EVENT NUMBERS ** 28158 28159 28160 28161 28162 28163 28164 28165 28166 +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28158 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: OYSTER CREEK REGION: 1 |NOTIFICATION DATE: 12/19/94 | |UNIT: [1] [ ] [ ] STATE: NJ |NOTIFICATION TIME: 10:33 [ET]| |RX TYPE: [1] GE-2 |EVENT DATE: 12/19/94 | +------------------------------------------------+EVENT TIME: 10:00[EST]| |NRC NOTIFIED BY: FRANK CIGANIK |LAST UPDATE DATE: 12/19/94 | |HQ OPS OFFICER: WILLIAM HUFFMAN +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: UNUSUAL EVENT +-----------------------------+ |10 CFR SECTION: |LARRY NICHOLSON RDO | |ASHU 50.72(b)(1)(i)(A) PLANT S/D REQD BY TS |ED GOODWIN EO | |AAEC 50.72(a)(1)(i) EMERGENCY DECLARED |BAGWELL FEMA | | |GENE KELLY RDO | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | N Y 58 POWER OPERATION | 58 POWER OPERATION | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | TECH SPEC REQUIRED SHUTDOWN DUE TO EXCESSIVE CONTAINMENT LEAKAGE. | | | | BASED ON NITROGEN USAGE CALCULATIONS FOR CONTAINMENT INERTING PURPOSES, THE | | LICENSEE ESTIMATES THAT APPROXIMATELY 900 STANDARD CUBIC FEET PER HOUR | | (SCFH) OF NITROGEN IS BEING USED TO MAINTAIN CONTAINMENT AT 1 PSIG NITROGEN | | PRESSURE. TECH SPEC 3.5.(a) STATES THAT THE PRIMARY CONTAINMENT LEAK RATE | | MUST BE LESS THAN 400 SCFH AT 35 PSIG. THE EXISTING CONTAINMENT LEAKAGE IS | | WELL IN EXCESS OF THE TECH SPEC LEAK RATE AND, THEREFORE, PLACES THE | | LICENSEE IN A TECH SPEC REQUIRED SHUTDOWN CONDITION. | | | | PER THE TECH SPEC, THE LICENSEE MUST BE IN COLD SHUTDOWN WITHIN 24 HOURS. | | HOWEVER, IF THE CONDITION IS NOT CORRECTED WITHIN 8 HOURS, THE LICENSEE | | MUST DECLARE AN UNUSUAL EVENT IN ACCORDANCE WITH THEIR EMERGENCY PLAN | | IMPLEMENTING PROCEDURES (EPIPs). | | | | THE PLANT RECENTLY STARTED UP AND FIRST PRESSURIZED CONTAINMENT WITH | | NITROGEN AT 14:30 EST ON 12/17. IT WAS JUST RECENTLY DETERMINED THAT | | EXCESS NITROGEN WAS BEING USED TO KEEP CONTAINMENT INERTED AT PRESSURE. AN | | INVESTIGATION INTO THE LOCATION OF THE LEAK IS IN PROGRESS. THE LICENSEE | | SUSPECTS THAT A CONTAINMENT VALVE IS MISCONFIGURED. | | | | THE NRC RESIDENT INSPECTOR HAS BEEN INFORMED. | | | | ***UPDATE AT 16:20 BY FRANZ TO GOULD*** THE LICENSEE DECLARED AN UNUSUAL | | EVENT AT 16:07 DUE TO LOSS OF PRIMARY CONTAINMENT IN ACCORDANCE WITH THEIR | | TECHNICAL SPECIFICATIONS AND THE INABILITY TO REPAIR THE LEAK WITHIN 8 | | HOURS. THE LEAK RATE IS 700 SCFH AT 1 PSIG WITH THE REACTOR AT 37% POWER. | | THE LICENSEE IS DECREASING POWER AT THE RATE OF 2MWe/HR. THE LEAK IS | | LOCATED AT DRYWELL VENT CONTAINMENT ISOLATION VALVES V-27-1 AND V-27-2. THE | | LICENSEE PLANS TO TAKE THE PLANT TO COLD S/D. THE RI HAS BEEN INFORMED | | ALONG WITH STATE AND LOCAL AGENCIES. THE LICENSEE HAS ALSO ISSUED A PRESS | | RELEASE. | | | | ***UPDATE AT 21:49 BY FRANZ TO GOULD*** THE NOUE WAS TERMINATED AT 21:40 | | DUE TO THE COMPLETION OF REPAIRS TO THE TWO LEAKING VALVES. REACTOR POWER | | IS AT 35% AND THE CURRENT LEAK RATE FOR THE VALVES IS 0.4 SCFH AT 37.5 | | PSIG. THE LEAKAGE LIMIT FOR THESE VALVES IS 3.7 SCFH. THE RI WILL BE | | INFORMED AND STATE WAS NOTIFIED. RDO KELLY, EO ROE AND FEMA BAGWELL WERE | | NOTIFIED. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28159 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: DIABLO CANYON REGION: 4 |NOTIFICATION DATE: 12/19/94 | |UNIT: [ ] [2] [ ] STATE: CA |NOTIFICATION TIME: 15:02 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 12/19/94 | +------------------------------------------------+EVENT TIME: 10:17[PST]| |NRC NOTIFIED BY: GEOLZER |LAST UPDATE DATE: 12/19/94 | |HQ OPS OFFICER: CHAUNCEY GOULD +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |THOMAS WESTERMAN 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 | M/R Y 100 POWER OPERATION | 0 HOT STANDBY | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | THE UNIT WAS MANUALLY TRIPPED FROM A LITTLE BELOW 50% POWER DUE TO HIGH | | CONDENSER DIFFERENTIAL PRESSURE. | | | | THE LICENSEE HAD REDUCED REACTOR POWER FROM 100% POWER TO LESS THAN 50% | | POWER DUE TO HIGH SEAS WHICH HAD CAUSED KELP AND DEBRIS TO ENTER THE | | CONDENSER WATERBOX. | | THEY HAD SECURED THE CIRC WATER PUMP 2-2 (THE WEST HALF OF THE CONDENSER) | | ALONG WITH THE ASSOCIATED TRAVELING DEBRIS SCREENS. THE SCREENS FOR CIRC | | WATER PUMP 2-1 THEN OVERLOADED DUE TO KELP AND DEBRIS BUILDUP AND STOPPED | | MOVING. FOLLOWING THIS, A MANUAL UNIT TRIP WAS PERFORMED DUE TO A POSSIBLE | | HIGH CONDENSER DIFFERENTIAL PRESSURE ON THE EAST SIDE OF THE CONDENSER (THE | | WEST SIDE HAD ALREADY BEEN SECURED) AND THEN THE CIRC WATER PUMP 2-1 WAS | | SECURED. ALL RODS FULLY INSERTED AND THERE WAS NO SI OR ECCS ACTUATION. | | THE 2-4 STEAM GENERATOR 10% STEAM DUMP VALVE DID NOT OPEN ACCORDING TO THE | | CONTROLLER SETPOINT, RESULTING IN THE 2-4 S/G SAFETY RELIEF VALVE LIFTING | | FOR APPROXIMATELY 10 SECONDS BEFORE RECLOSING. A CONTROL ROOM OPERATOR | | MANUALLY INCREASED CONTROLLER DEMAND TO THE VALUE IT SHOULD HAVE BEEN, AND | | THEN PLACED THE CONTROLLER IN AUTO, AT WHICH POINT THE CONTROLLER | | FUNCTIONED AS DESIGNED. THE LICENSEE ALSO MANUALLY ISOLATED THE MSIVs DUE | | TO THE LOSS OF CONDENSER COOLING. | | | | THE LICENSEE IS INVESTIGATING AN APPARENT CHARGING LINE PROBLEM WHICH | | INDICATES LOW CHARGING FLOW. THE RI WILL BE INFORMED. THE LICENSEE MAY | | MAKE A PRESS RELEASE. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |GENERAL INFORMATION or OTHER | |EVENT NUMBER: 28160 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |LICENSEE: WESTINGHOUSE |NOTIFICATION DATE: 12/19/94 | | CITY: RICHLAND REGION: 4 |NOTIFICATION TIME: 16:15 [ET]| | COUNTY: BENTON STATE: WA |EVENT DATE: 12/12/94 | |LICENSE#: AGREEMENT: Y |EVENT TIME: 14:30[PST]| | DOCKET: |LAST UPDATE DATE: 12/19/94 | | +-----------------------------+ | |PERSON ORGANIZATION| | |THOMAS WESTERMAN RDO | | | | +------------------------------------------------+ | |NRC NOTIFIED BY: LEWA | | |HQ OPS OFFICER: CHAUNCEY GOULD | | +------------------------------------------------+ | |EMERGENCY CLASS: NOT APPLICABLE | | |10 CFR SECTION: | | |NINF INFORMATION ONLY | | | | | | | | | | | | | | +------------------------------------------------+-----------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | THE HANFORD SITE REPORTED TO THE NATIONAL RESPONSE CENTER THAT THEY HAD A | | CHROMIUM LEAK FROM A QUICK DISCONNECT DURING TANK FLUSHING OF AN | | UNDERGROUND STORAGE TANK. THEY ARE USING ABSORBENTS TO REMOVE THE PRODUCT. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |GENERAL INFORMATION or OTHER | |EVENT NUMBER: 28161 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |LICENSEE: DOW CORNING CORP |NOTIFICATION DATE: 12/19/94 | | CITY: MIDLAND REGION: 3 |NOTIFICATION TIME: 16:25 [ET]| | COUNTY: STATE: MI |EVENT DATE: 12/19/94 | |LICENSE#: AGREEMENT: N |EVENT TIME: 00:00[EST]| | DOCKET: |LAST UPDATE DATE: 12/19/94 | | +-----------------------------+ | |PERSON ORGANIZATION| | | | | | | +------------------------------------------------+ | |NRC NOTIFIED BY: SCHROEDER | | |HQ OPS OFFICER: CHAUNCEY GOULD | | +------------------------------------------------+ | |EMERGENCY CLASS: NOT APPLICABLE | | |10 CFR SECTION: | | |NINF INFORMATION ONLY | | | | | | | | | | | | | | +------------------------------------------------+-----------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | THE FOLLOWING FACSIMILIE WAS TRANSMITTED TO THE NRC FROM DOW CORNING: | | | | "DOW CORNING PRODUCED LAB-SCALE QUANTITIES OF "SYLGARD 170" SILICONE | | ELASTOMER AND "SYLGARD 170" SILICONE FAST CURE ELASTOMER USING A HIGHER | | PIGMENT. LOT ACCEPTANCE TESTING SHOWED THAT THE MATERIAL PRODUCED WITH | | HIGHER PURITY PIGMENT MEETS ALL DOW CORNING'S SALES SPECIFICATIONS. WE WILL | | BE PERFORMING TRIAL RUNS IN OUR PRODUCTION EQUIPMENT, OF "SYLGARD 170" | | SILICONE ELASTOMER AND "SYLGARD 170" SILICONE FAST CURE ELASTOMER, USING | | THE HIGHER PURITY GRADE PIGMENT TO INSURE THE RESULTS ARE COMPARABLE TO OUR | | LAB TRIALS PRIOR TO RESUMING FULL SCALE PRODUCTION. | | | | WE ARE CONTINUING TO WORK IN CONJUNCTION WITH UNDERWRITERS LABORATORIES TO | | IDENTIFY APPROPRIATE FIRE PERFORMANCE TESTS FOR "SYLGARD 170" SILICONE | | ELASTOMER, "SYLGARD 170 SILICONE FAST CURE ELASTOMER, AND DOW CORNING | | "96-081" RTV ADHESIVE/SEALANT. | | | | WHILE OUR EFFORTS TO RESOLVE THIS MATTER WILL CONTINUE OVER THE UPCOMING | | HOLIDAYS, OUR NEXT UPDATE WILL OCCUR NO LATER THAN JANUARY 6, 1995. IF YOU | | HAVE QUESTIONS, PLEASE CONTACT ME ON OUR INFORMATION LINE FOR THIS MATTER | | (517) 496-8777." | | | | SENT NOTICE TO W. HAASS. | | | | ALSO SEE EVENTS 28079 & 28136 | | | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28162 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: FERMI REGION: 3 |NOTIFICATION DATE: 12/19/94 | |UNIT: [2] [ ] [ ] STATE: MI |NOTIFICATION TIME: 17:19 [ET]| |RX TYPE: [2] GE-4 |EVENT DATE: 12/19/94 | +------------------------------------------------+EVENT TIME: 17:08[EST]| |NRC NOTIFIED BY: KIEL |LAST UPDATE DATE: 12/19/94 | |HQ OPS OFFICER: CHAUNCEY GOULD +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |LEWIS MILLER RDO | |APRE 50.72(b)(2)(vi) OFFSITE NOTIFICATION |ROE EO | | | | | |BEECHER PAO | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 2 | N Y 1 STARTUP | 0 STARTUP | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | THE LICENSEE IS MAKING A PRESS RELEASE CONCERNING THE STARTUP OF THE UNIT | | FOLLOWING A LENGTHY SHUTDOWN FOR TURBINE REPAIRS. | | | | AT 17:08 @ 12/19/94, THE FERMI 2 REACTOR WAS CRITICAL FOR SHUTDOWN MARGIN | | TESTING. TESTING WILL CONTINUE THROUGH THE POWER ASCENSION AND IS EXPECTED | | TO TAKE 45-60 DAYS. THE PLANTS REACTOR, TURBINE AND SAFETY SYSTEMS WILL BE | | THOROUGHLY TESTED BEFORE FULL POWER OPERATION BEGINS. | | | | THE FERMI 2 TURBINE WILL OPERATE WITHOUT ITS LARGEST BLADES, REDUCING THE | | PLANTS OPERATING CAPABILITY FROM 1140 MW TO 800-900 MW. | | | | NEW LOW PRESSURE TURBINES WILL BE INSTALLED IN 1996, INCREASING THE PLANTS | | CAPACITY TO ABOUT 1160 MW. | | | | THE RI WAS INFORMED. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28163 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: OYSTER CREEK REGION: 1 |NOTIFICATION DATE: 12/19/94 | |UNIT: [1] [ ] [ ] STATE: NJ |NOTIFICATION TIME: 18:06 [ET]| |RX TYPE: [1] GE-2 |EVENT DATE: 12/19/94 | +------------------------------------------------+EVENT TIME: 18:00[EST]| |NRC NOTIFIED BY: DEMONCH |LAST UPDATE DATE: 12/19/94 | |HQ OPS OFFICER: CHAUNCEY GOULD +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |GENE KELLY RDO | |NLTR LICENSEE 24 HR REPORT | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | N Y 38 POWER OPERATION | 38 POWER OPERATION | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | TECHNICAL SPECIFICATION VIOLATION DUE TO FAILURE TO VALVE OUT CONTROL ROD | | HYDRAULIC CONTROL UNIT DUE TO FAILURE TO PERFORM SCRAM TIME TESTING. | | | | THE LICENSEE HAS DETERMINED THAT CONTROL ROD 50-23 SHOULD HAVE BEEN | | DECLARED INOPERABLE AND VALVED OUT OF SERVICE DURING THE UNIT STARTUP ON | | 12/14/94 UNTIL SCRAM TIME TESTING ON THIS ROD HAD BEEN PERFORMED. THE | | CONTROL ROD WAS TESTED, BUT DUE TO A BAD POSITION INDICATION PROBE, THE | | SCRAM TIME COULD NOT BE OBTAINED FOR THIS PARTICULAR CONTROL ROD. THE | | CONTROL ROD HAS BEEN SUBSEQUENTLY TESTED SATISFACTORILY (12//16/94 @ | | 22:40). THE FAILURE TO VALVE OUT THE CONTROL ROD WAS CAUSED BY PERSONNEL | | ERROR. THE RI WILL BE NOTIFIED. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28164 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: LASALLE REGION: 3 |NOTIFICATION DATE: 12/19/94 | |UNIT: [1] [ ] [ ] STATE: IL |NOTIFICATION TIME: 21:38 [ET]| |RX TYPE: [1] GE-5,[2] GE-5 |EVENT DATE: 12/19/94 | +------------------------------------------------+EVENT TIME: 18:36[CST]| |NRC NOTIFIED BY: HENRY |LAST UPDATE DATE: 12/19/94 | |HQ OPS OFFICER: CHAUNCEY GOULD +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |LEWIS MILLER RDO | |NINF INFORMATION ONLY | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | N Y 17 POWER OPERATION | 0 HOT SHUTDOWN | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | MANUAL REACTOR SCRAM DURING UNIT SHUTDOWN. | | | | DURING THE STARTUP OF UNIT 1, NUMEROUS PROBLEMS WITH THE ROD PATTERN | | INDICATION SYSTEM WERE EXPERIENCED. AS A RESULT, A DECISION WAS MADE TO | | TAKE THE UNIT TO HOT SHUTDOWN TO RENDER REPAIRS. DURING THE UNIT SHUTDOWN, | | A MANUAL REACTOR SCRAM WAS INITIATED IN ACCORDANCE WITH STATION PROCEDURES. | | THE RESULTANT SHRINK IN LEVEL ASSOCIATED WITH THE SCRAM CAUSED AN | | AUTOMATIC RPS ACTUATION DUE TO LOW REACTOR VESSEL WATER LEVEL, HOWEVER ALL | | CONTROL RODS WERE ALREADY FULLY INSERTED. THE LICENSEE REPORTED THAT NO | | SAFETY/RELIEF VALVES LIFTED, AND NO ECCS INJECTION OCCURRED. | | | | THE LICENSEE REPORTED THIS AS AN INFORMATION ONLY CALL SINCE IT WAS A | | PREPLANNED MANUAL REACTOR SCRAM. THE NRC RESIDENT INSPECTOR HAS BEEN | | INFORMED. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |OTHER NUCLEAR MATERIAL | |EVENT NUMBER: 28165 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |LICENSEE: MICHIGAN STATE UNIVERSITY |NOTIFICATION DATE: 12/19/94 | | CITY: EAST LANSING REGION: 3 |NOTIFICATION TIME: 21:41 [ET]| | COUNTY: STATE: MI |EVENT DATE: 12/19/94 | |LICENSE#: 21-00021-29 AGREEMENT: N |EVENT TIME: 17:00[EST]| | DOCKET: |LAST UPDATE DATE: 12/19/94 | | +-----------------------------+ | |PERSON ORGANIZATION| | |LEWIS MILLER RDO | | | | +------------------------------------------------+ | |NRC NOTIFIED BY: ERICKSON | | |HQ OPS OFFICER: CHAUNCEY GOULD | | +------------------------------------------------+ | |EMERGENCY CLASS: NOT APPLICABLE | | |10 CFR SECTION: | | |NINF INFORMATION ONLY | | | | | | | | | | | | | | +------------------------------------------------+-----------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | THE LICENSEE REPORTED A LEAK FROM A 8 MILLICURIE NI-63 SEALED SOURCE USED | | IN AN ELECTRON CAPTURE DEVICE. | | | | THE LICENSEE REPORTED THAT AN EMPLOYEE ACCIDENTALLY DAMAGED THE NI-63 | | SOURCE ON 12/16/94 WITH A SCREWDRIVER WHILE ATTEMPTING TO REMOVE IT FROM AN | | INSTRUMENT TO PUT IT AWAY. THERE WAS NO LEAKAGE MEASURED ON 12/16/94, BUT | | ON 12/19/94 THEY TOOK CONFIRMATORY READINGS AND MEASURED A LEAKAGE OF | | 0.0086 MICROCURIES. THE SOURCE HAD BEEN ISOLATED IN PLASTIC BAGS IN A BOX | | AND HAS NOT BEEN TOUCHED SINCE 12/16. A BIOASSAY WAS PERFORMED ON THE | | INDIVIDUAL WHO DAMAGED THE SOURCE, BUT THE RESULTS WERE NEGATIVE. THE | | SOURCE HAS SINCE BEEN PLACED IN A MORE SECURE AREA. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28166 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: DIABLO CANYON REGION: 4 |NOTIFICATION DATE: 12/20/94 | |UNIT: [1] [2] [ ] STATE: CA |NOTIFICATION TIME: 06:04 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 12/20/94 | +------------------------------------------------+EVENT TIME: 02:45[PST]| |NRC NOTIFIED BY: BRAD HINDS |LAST UPDATE DATE: 12/20/94 | |HQ OPS OFFICER: WILLIAM HUFFMAN +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: UNUSUAL EVENT +-----------------------------+ |10 CFR SECTION: |THOMAS WESTERMAN RDO | |AAEC 50.72(a)(1)(i) EMERGENCY DECLARED |JACK ROE EO | |ANEA 50.72(b)(1)(iii) EARTHQUAKE |EARL FEMA | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | N Y 90 POWER OPERATION | 90 POWER OPERATION | | 2 | N N 0 HOT STANDBY | 0 HOT STANDBY | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | MINOR EARTHQUAKE FELT ONSITE. | | | | AN MAGNITUDE 4.5 EARTHQUAKE ON THE RICHTER SCALE OCCURRED AT O2:28 PST 15 | | MILES NNE OF PASO ROBLES, CALIFORNIA. THIS IS APPROXIMATELY 50 MILES FROM | | THE PLANT SITE. THE EARTHQUAKE WAS BARELY FELT BY PLANT PERSONNEL, BUT PER | | THE LICENSEE'S EMERGENCY ACTION LEVELS, HAD TO BE CLASSIFIED AS AN UNUSUAL | | EVENT. | | | | THE EARTHQUAKE DID TRIGGER THE SITE'S TERRATECH SEISMIC MONITOR (LOW LEVEL) | | BUT DID NOT TRIGGER THE HIGH LEVEL KINEMETRICS MONITOR. BECAUSE THE | | KINEMETRICS WAS NOT TRIGGERED, THE LICENSEE CONCLUDED THAT GROUND MOTION | | WAS LESS THAN 0.02 G'S. | | | | THERE IS NO EVIDENCE OR REASON TO BELIEVE THAT ANY DAMAGE OCCURRED ONSITE. | | THERE HAS BEEN NO REPORTS OF DAMAGE OR INJURIES OFFSITE. | | | | THE LICENSEE WILL TERMINATE THE UNUSUAL EVENT AFTER ALL NOTIFICATIONS HAVE | | BEEN MADE AND LICENSEE MANAGEMENT IS SATISFIED WITH THE OPERATIONAL | | ASSESSMENT OF THE PLANT. | | | | THE CALIFORNIA OFFICE OF EMERGENCY SERVICES AND LOCAL AUTHORITIES HAVE BEEN | | INFORMED. THE RESIDENT INSPECTOR WILL BE INFORMED. | +------------------------------------------------------------------------------+