U.S. Nuclear Regulatory Commission Operations Center Event Reports For 05/07/98 - 05/08/98 ** EVENT NUMBERS ** 34005 34049 34187 34188 34189 34190 34191 34192 34193 !!!!!!!!! THIS EVENT HAS BEEN RETRACTED. THIS EVENT HAS BEEN RETRACTED !!!!!!! +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 34005 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: VERMONT YANKEE REGION: 1 |NOTIFICATION DATE: 04/02/98 | |UNIT: [1] [ ] [ ] STATE: VT |NOTIFICATION TIME: 11:46 [ET]| |RX TYPE: [1] GE-4 |EVENT DATE: 04/02/98 | +------------------------------------------------+EVENT TIME: 10:15[EST]| |NRC NOTIFIED BY: WISNIEWSKI |LAST UPDATE DATE: 05/07/98 | |HQ OPS OFFICER: JOHN MacKINNON +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |BILL RULAND RDO | |ADAS 50.72(b)(2)(i) DEG/UNANALYZED COND | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |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 +------------------------------------------------------------------------------+ | DESIGN BASIS ANALYSIS LACKING FOR THE ANTICIPATED TRANSIENT WITHOUT SCRAM | | (ATWS) MITIGATION SYSTEM | | | | AT 1015 EST ON 04/02/98, THE CONTROL ROOM WAS INFORMED THAT THERE APPEARS | | TO BE NO ANALYSIS TO SUBSTANTIATE THE DESIGN BASIS FOR THE ATWS MITIGATION | | SYSTEM. THIS CONDITION WAS DISCOVERED AS A RESULT OF AN ONGOING | | INVESTIGATION OF THE REACTOR RECIRCULATION SYSTEM PUMP "B" FIELD CIRCUIT | | BREAKER FAILURE ON 03/20/98. THIS PLACES THE PLANT IN AN UNANALYZED | | CONDITION. | | | | THIS CONDITION IS BEING INVESTIGATED AND WILL REQUIRE RESOLUTION PRIOR TO | | PLANT STARTUP. THE ALTERNATE ROD INSERTION RECIRCULATION PUMP TRIP | | (ARI-RPT) FUNCTION WAS DECLARED INOPERABLE. | | | | THE NRC RESIDENT INSPECTOR WAS NOTIFIED OF THIS EVENT BY THE LICENSEE. | | | | * * * UPDATE AT 1014 ON 05/07/98 BY MIKE SORTWELL TO BAILEY * * * | | | | SINCE THE ABOVE EVENT WAS REPORTED TO THE NRC, THE LICENSEE HAS IDENTIFIED | | AN ADDITIONAL ANALYSIS THAT SUBSTANTIATES THE DESIGN BASIS FOR THE ATWS | | MITIGATION SYSTEM. THUS, THE LICENSEE DESIRES TO RETRACT THIS EVENT. | | | | THE LICENSEE NOTIFIED THE NRC RESIDENT INSPECTOR. THE NRC OPERATIONS | | OFFICER NOTIFIED THE R1DO JACK MCFADDEN. | +------------------------------------------------------------------------------+ !!!!!!!!! THIS EVENT HAS BEEN RETRACTED. THIS EVENT HAS BEEN RETRACTED !!!!!!! +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 34049 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: OCONEE REGION: 2 |NOTIFICATION DATE: 04/09/98 | |UNIT: [1] [2] [3] STATE: SC |NOTIFICATION TIME: 18:32 [ET]| |RX TYPE: [1] B&W-L-LP,[2] B&W-L-LP,[3] B&W-L-LP |EVENT DATE: 04/09/98 | +------------------------------------------------+EVENT TIME: 15:50[EDT]| |NRC NOTIFIED BY: MIKE HILL |LAST UPDATE DATE: 05/07/98 | |HQ OPS OFFICER: DICK JOLLIFFE +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |PIERCE SKINNER 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 | | 2 | N N 0 REFUELING | 0 REFUELING | | 3 | N Y 100 POWER OPERATION | 100 POWER OPERATION | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | -KEOWEE HYDRO UNITS RECD AN EMERGENCY START SIGNAL DUE TO PERSONNEL ERROR- | | | | WITH UNITS 1 AND 3 AT 100% POWER AND UNIT 2 DEFUELED IN A REFUELING OUTAGE, | | KEOWEE HYDRO UNITS 1 AND 2 WERE GENERATING POWER AND SUPPLYING IT TO THE | | GRID AT THE TIME OF THIS EVENT. | | | | AT 1550, BOTH KEOWEE HYDRO UNITS RECEIVED AN EMERGENCY START SIGNAL AND | | IMMEDIATELY REJECTED THEIR LOADS AND REVERTED TO THE NO LOAD EMERGENCY | | START MODE, AS EXPECTED. | | | | THE EMERGENCY START SIGNAL WAS APPARENTLY GENERATED BY I&C TECHNICIANS | | WHILE THEY WERE PERFORMING A WIRING INSPECTION IN THE KEOWEE EMERGENCY | | START CHANNEL "2A" CABINET. | | | | THE LICENSEE IS INVESTIGATING THE CAUSE OF THIS ESF ACTUATION AND | | INFORMED THE NRC RESIDENT INSPECTOR. | | | | * * * UPDATE AT 1638 ON 05/07/98 FROM R. TODD TAKEN BY STRANSKY * * * | | | | LICENSEE TROUBLESHOOTING AND INVESTIGATION DETERMINED THAT THE INADVERTENT | | INVALID ACTUATION OF KEOWEE EMERGENCY START CHANNEL "2A" DID NOT INVOLVE | | THE ENGINEERED SAFEGUARDS SYSTEM CIRCUITRY. THEREFORE, THIS START WAS | | NOT AN ESF ACTUATION. THUS, THE LICENSEE DESIRES TO RETRACT THIS EVENT | | NOTIFICATION. DUKE POWER COMPANY WILL SUBMIT A VOLUNTARY LER TO THE NRC | | TO DESCRIBE THIS EVENT. | | | | THE LICENSEE NOTIFIED THE NRC RESIDENT INSPECTOR. THE NRC OPERATIONS | | OFFICER NOTIFIED THE R2DO PAUL FREDRICKSON. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 34187 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: PERRY REGION: 3 |NOTIFICATION DATE: 05/07/98 | |UNIT: [1] [ ] [ ] STATE: OH |NOTIFICATION TIME: 10:03 [ET]| |RX TYPE: [1] GE-6 |EVENT DATE: 05/06/98 | +------------------------------------------------+EVENT TIME: 10:25[EDT]| |NRC NOTIFIED BY: TODD HENDERSON |LAST UPDATE DATE: 05/07/98 | |HQ OPS OFFICER: FANGIE JONES +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |PATRICK HILAND RDO | |NLTR LICENSEE 24 HR REPORT | | |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 +------------------------------------------------------------------------------+ | SOME PLANT RADIATION MONITOR SURVEILLANCE REQUIREMENTS MISSED. | | | | THE LICENSEE DETERMINED THAT THE LOGIC SYSTEM FUNCTIONAL TESTING (LSFT) | | REQUIREMENTS AS SPECIFIED IN TECHNICAL SPECIFICATION (TS) SURVEILLANCE | | REQUIREMENT 3.3.6.1.5 HAD NOT BEEN FULLY MET FOR PLANT RADIATION MONITORS | | 1D17-KO609A TO D. SPECIFICALLY, K2 CONTACTS FOR THE CONTAINMENT VESSEL AND | | DRYWELL PURGE (M14) ISOLATION WERE NOT POSITIVELY VERIFIED AS PART OF THE | | SURVEILLANCE PROGRAM. THE INSTRUCTIONS THAT CONTAINED THE REQUIREMENTS | | WERE IMPROPERLY CANCELED FOLLOWING THE RECEIPT OF A LICENSE AMENDMENT | | (#77) THAT REMOVED RESPONSE TIME TESTING AND THE LSFT REQUIREMENTS WERE | | INCORPORATED IN OTHER SURVEILLANCE INSTRUCTIONS. ALTHOUGH THE RELAYS HAVE | | BEEN TESTED, IT APPEARS THAT THE CONTACTS THEMSELVES HAVE NOT BEEN TESTED | | SINCE THE REFUELING OUTAGE IN 1994. THE TESTING WAS COMPLETED ON 05/06/98, | | INSURING TS COMPLIANCE. | | | | AN INVESTIGATION IS ONGOING AND FINAL CORRECTIVE ACTIONS WILL BE DETERMINED | | TO ENSURE TS COMPLIANCE IN THE FUTURE. | | | | THE LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 34188 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: HADDAM NECK REGION: 1 |NOTIFICATION DATE: 05/07/98 | |UNIT: [1] [ ] [ ] STATE: CT |NOTIFICATION TIME: 10:10 [ET]| |RX TYPE: [1] W-4-LP |EVENT DATE: 05/07/98 | +------------------------------------------------+EVENT TIME: 09:30[EDT]| |NRC NOTIFIED BY: RICHARD WILLIS |LAST UPDATE DATE: 05/07/98 | |HQ OPS OFFICER: FANGIE JONES +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |JACK MCFADDEN 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 N 0 REFUELING | 0 REFUELING | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | ACCIDENT STACK RADIATION MONITOR SAMPLING IS INCORRECT, BUT CONSERVATIVE. | | | | DURING VENTILATION SYSTEM TESTING, THE LICENSEE DISCOVERED THAT THE | | ACCIDENT STACK RADIATION MONITOR SAMPLING WAS NOT ISOKINETIC AS STATED | | IN THE UFSAR. THE ERROR APPEARS TO BE THE RESULT OF 'UNACCOUNTED FOR' | | STACK FLOW. THE ERRORS HAVE BEEN DETERMINED TO BE CONSERVATIVE. | | LICENSEE ENGINEERING DEPARTMENT PERSONNEL ARE DETERMINING CORRECTIVE | | ACTIONS. | | | | THE LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |FUEL CYCLE FACILITY | |EVENT NUMBER: 34189 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: PORTSMOUTH GASEOUS DIFFUSION PLANT |NOTIFICATION DATE: 05/07/98 | | RXTYPE: URANIUM ENRICHMENT FACILITY |NOTIFICATION TIME: 16:51 [ET]| |COMMENTS: 2 DEMOCRACY CENTER |EVENT DATE: 05/06/98 | | 6903 ROCKLEDGE DRIVE |EVENT TIME: 16:50[EDT]| | BETHESDA, MD 20817 (301)564-3200 |LAST UPDATE DATE: 05/07/98 | | CITY: PIKETON REGION: 3 +-----------------------------+ | COUNTY: PIKE STATE: OH |PERSON ORGANIZATION| |LICENSE#: GDP-2 AGREEMENT: N |PATRICK HILAND RDO | | DOCKET: 0707002 |MARGARET FEDERLINE EO | +------------------------------------------------+ | |NRC NOTIFIED BY: RON CRABTREE | | |HQ OPS OFFICER: BOB STRANSKY | | +------------------------------------------------+ | |EMERGENCY CLASS: NOT APPLICABLE | | |10 CFR SECTION: | | |NBNL RESPONSE-BULLETIN | | | | | | | | | | | | | | +------------------------------------------------+-----------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | NRC BULLETIN 91-01, 24 HOUR REPORT. | | | | WHILE PERFORMING A TECHNICAL SERVICE REQUIREMENT (TSR) SURVEILLANCE OF CELL | | #29-3-6 WHICH WAS REQUIRED TO BE IN A FLUORINATED ENVIRONMENT, OPERATIONS | | PERSONNEL OBSERVED CONFLICTING INDICATIONS FROM ADJACENT STAGES. DUE TO | | DOUBTS ABOUT THE INTEGRITY OF THE FLUORINATED ENVIRONMENT, THE CELL WAS | | CONSIDERED TO BE IN A UF6-NEGATIVE CONDITION. NUCLEAR CRITICALITY SAFETY | | APPROVAL NCSA_0330-004.A02 REQUIRES THAT ANY CASCADE EQUIPMENT SHUT DOWN | | (MOTOR TURNED OFF) AND IN A UF6-NEGATIVE CONDITION BE SUPPLIED WITH A | | DRY AIR OR NITROGEN BUFFER AT GREATER THAN 14 PSIA FOR MODERATION CONTROL. | | THIS CELL HAD PREVIOUSLY BEEN CLASSIFIED AS "PLANNED EXPEDITIOUS HANDLING", | | INDICATING THAT THE CELL CONTAINS MORE THAN THE SAFE MASS OF URANIUM. | | | | PLANT OPERATIONS PERSONNEL PRESSURIZED THE CELL WITH DRY AIR AT GREATER | | THAN 14 PSIA WITHIN EIGHT HOURS, AS REQUIRED BY THE TSR. | | | | THE LICENSEE NOTIFIED THE NRC RESIDENT INSPECTOR AND THE DOE SITE | | REPRESENTATIVE. | | | | NOTE: REFER TO EVENT #34192 FOR A RELATED EVENT. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |GENERAL INFORMATION or OTHER | |EVENT NUMBER: 34190 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |LICENSEE: SAIC, INC, EGS DIVISION |NOTIFICATION DATE: 05/07/98 | | CITY: HUNTSVILLE REGION: 2 |NOTIFICATION TIME: 17:14 [ET]| | COUNTY: STATE: AL |EVENT DATE: 05/07/98 | |LICENSE#: AGREEMENT: Y |EVENT TIME: 01:00[CDT]| | DOCKET: |LAST UPDATE DATE: 05/07/98 | | +-----------------------------+ | |PERSON ORGANIZATION| | |PAUL FREDRICKSON RDO | | | | +------------------------------------------------+VERN HODGE NRR | |NRC NOTIFIED BY: TONY GILL | | |HQ OPS OFFICER: BOB STRANSKY | | +------------------------------------------------+ | |EMERGENCY CLASS: NOT APPLICABLE | | |10 CFR SECTION: | | |CDEG 21.21(c)(3)(i) DEFECTS/NONCOMPLIANCE | | | | | | | | | | | | | | +------------------------------------------------+-----------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | 10CFR PART 21 REPORT REGARDING INCORRECTLY INSTALLED MOVABLE CONTACTS IN | | CUTLER-HAMMER RELAYS PROVIDED TO DUKE POWER COMPANY AND GEORGIA POWER | | COMPANY. | | | | MOVABLE CONTACTS IN A CUTLER-HAMMER D26MA 4-POLE FRONT ATTACHMENT FOR A D26 | | RELAY WERE FOUND TO BE INSTALLED UPSIDE DOWN. THE PROBLEM WAS IDENTIFIED | | TO CUTLER-HAMMER IN OCTOBER 1997, AND IS THOUGHT TO BE A RANDOM OCCURRENCE. | | HOWEVER, THE VENDOR HAS TAKEN STEPS TO PREVENT RECURRENCE. | | | | THE CALLER REPORTED THAT WITH THE INCORRECTLY INSTALLED MOVABLE CONTACTS, | | THE RELAY WILL WORK PROPERLY WHEN NEW, BUT THE COPPER CONTACT SURFACE WILL | | BE BURNED AWAY BY REPEATED OPENING AND CLOSING OF THE RELAY, INCREASING | | CONTACT RESISTANCE. (THE OTHER SIDE OF THE CONTACT IS COATED WITH SILVER | | TO PREVENT THIS PROBLEM.) THIS CONDITION COULD LEAD TO UNSATISFACTORY | | OPERATION OF THE RELAY CONTACTS AT SOME POINT IN THE FUTURE. | | | | THE CALLER STATED THAT THE DATE CODES OF POTENTIALLY AFFECTED RELAY | | ATTACHMENTS WOULD BE PROVIDED TO THE NRC IN A LETTER TO BE ISSUED ON | | 05/08/98. HOWEVER, A TOTAL OF SIX POTENTIALLY AFFECTED RELAY ATTACHMENTS | | WERE SOLD TO GEORGIA POWER COMPANY, AND 80 RELAY ATTACHMENTS WERE SOLD TO | | DUKE POWER COMPANY. A SIMPLE VISUAL INSPECTION OF THE ATTACHMENT WILL | | DETERMINE WHETHER THE CONTACTS ARE ORIENTED CORRECTLY. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 34191 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: CATAWBA REGION: 2 |NOTIFICATION DATE: 05/07/98 | |UNIT: [1] [ ] [ ] STATE: SC |NOTIFICATION TIME: 18:43 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 05/07/98 | +------------------------------------------------+EVENT TIME: 17:45[EDT]| |NRC NOTIFIED BY: CHRISTOPHER ORR |LAST UPDATE DATE: 05/07/98 | |HQ OPS OFFICER: BOB STRANSKY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |PAUL FREDRICKSON RDO | |AUNA 50.72(b)(1)(ii)(A) UNANALYZED COND OP | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | N Y 50 POWER OPERATION | 30 POWER OPERATION | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | AUXILIARY FEEDWATER (AFW) SYSTEM DECLARED INOPERABLE DUE TO ELEVATED | | SUCTION SOURCE WATER TEMPERATURE. | | | | AT 1530, FOLLOWING A POWER REDUCTION FOR AN UNRELATED PROBLEM, THE LICENSEE | | DETERMINED THAT THE UPPER SURGE TANK (NORMAL SUCTION SOURCE FOR THE AFW | | SYSTEM) WATER TEMPERATURE WAS 230øF. THE AFW SYSTEM MAXIMUM DESIGN | | TEMPERATURE LISTED IN THE UPDATED FINAL SAFETY ANALYSIS REPORT IS 138øF. | | ALL THREE AFW PUMPS WERE DECLARED INOPERABLE DUE TO THIS ELEVATED | | TEMPERATURE. | | | | THE LICENSEE DISCOVERED THAT RECIRCULATION VALVE 1-CM-127 WAS PERMITTING | | EXCESSIVE FLOW OF HOT WATER INTO THE UPPER SURGE TANK. THE TEMPERATURE OF | | THE UPPER SURGE TANK WAS REDUCED TO LESS THAN 138øF AT 1730. THE AFW PUMPS | | REMAIN INOPERABLE PENDING THE LICENSEE'S EVALUATION OF THE IMPACT OF THE | | ELEVATED SUCTION TEMPERATURE ON THE AFW SYSTEM. THE APPLICABLE TECHNICAL | | SPECIFICATION LCO REQUIRES THAT ONE AFW PUMP BE RESTORED TO OPERABLE AS | | SOON AS POSSIBLE. | | | | THE LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |FUEL CYCLE FACILITY | |EVENT NUMBER: 34192 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: PORTSMOUTH GASEOUS DIFFUSION PLANT |NOTIFICATION DATE: 05/08/98 | | RXTYPE: URANIUM ENRICHMENT FACILITY |NOTIFICATION TIME: 02:59 [ET]| |COMMENTS: 2 DEMOCRACY CENTER |EVENT DATE: 05/07/98 | | 6903 ROCKLEDGE DRIVE |EVENT TIME: 15:00[EDT]| | BETHESDA, MD 20817 (301)564-3200 |LAST UPDATE DATE: 05/08/98 | | CITY: PIKETON REGION: 3 +-----------------------------+ | COUNTY: PIKE STATE: OH |PERSON ORGANIZATION| |LICENSE#: GDP-2 AGREEMENT: N |PATRICK HILAND RDO | | DOCKET: 0707002 |MARGARET FEDERLINE EO | +------------------------------------------------+ | |NRC NOTIFIED BY: STEVE MAY | | |HQ OPS OFFICER: DICK JOLLIFFE | | +------------------------------------------------+ | |EMERGENCY CLASS: NOT APPLICABLE | | |10 CFR SECTION: | | |NBNL RESPONSE-BULLETIN | | | | | | | | | | | | | | +------------------------------------------------+-----------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | NRC BULLETIN 91-01, 24 HOUR REPORT. | | | | AT 1610 ON 04/21/98, PLANT OPERATIONS PERSONNEL DISCOVERED THAT A NUCLEAR | | CRITICALITY SAFETY APPROVAL (NCSA) REQUIREMENT WAS NOT BEING MAINTAINED | | WITHIN THE X-330 PROCESS BUILDING. | | | | SAMPLE RESULTS FOR CELL #29-5-8 INDICATED THAT THE CELL WAS NOT IN A | | FLUORINATING ENVIRONMENT. WITHOUT A FLUORINATING ENVIRONMENT, THE CELL | | IS IN A UF6-NEGATIVE CONDITION (LESS THAN 10 PPM UF6 AT 2 PSIA). THIS | | CELL HAD PREVIOUSLY BEEN CLASSIFIED AS "PLANNED EXPEDITIOUS HANDLING" | | (PEH) INDICATING THAT THE CELL CONTAINS MORE THAN A SAFE MASS OF URANIUM. | | THIS CELL CONTAINS A PEH DEPOSIT OF UP TO 1687 GRAMS U-235 AT AN ENRICHMENT | | OF 5.4%. THE SAFE MASS FOR A DEPOSIT OF UO2F2 AT 5.4% IS 774 GRAMS U-235. | | NCSA 0330-004.A02, REQUIREMENT #8, REQUIRES THAT ANY CASCADE EQUIPMENT | | (COMPRESSOR) SHUT DOWN (MOTOR TURNED OFF) AND IN A UF6-NEGATIVE CONDITION | | BE SUPPLIED WITH A DRY AIR OR NITROGEN BUFFER AT GREATER THAN 14 PSIA FOR | | MODERATION CONTROL. | | | | PLANT OPERATIONS PERSONNEL PRESSURIZED THE CELL WITH DRY AIR AT GREATER | | THAN 14 PSIA WITHIN EIGHT HOURS TO MAINTAIN MODERATION CONTROL TO MEET THE | | NCSA REQUIREMENT. | | | | PLANT PERSONNEL NOTIFIED THE NRC RESIDENT INSPECTOR AND THE DOE SITE | | REPRESENTATIVE. | | | | NOTE: REFER TO SIMILAR EVENT #34189. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 34193 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: VOGTLE REGION: 2 |NOTIFICATION DATE: 05/08/98 | |UNIT: [ ] [2] [ ] STATE: GA |NOTIFICATION TIME: 05:19 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 05/08/98 | +------------------------------------------------+EVENT TIME: 04:01[EDT]| |NRC NOTIFIED BY: STEVE PHILLIPS |LAST UPDATE DATE: 05/08/98 | |HQ OPS OFFICER: DICK JOLLIFFE +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |PAUL FREDRICKSON RDO | |ARPS 50.72(b)(2)(ii) RPS ACTUATION |CECIL THOMAS, NRR EO | | |STUART RUBIN IRD | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |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 +------------------------------------------------------------------------------+ | -AUTO Rx TRIP FROM 100% POWER DUE TO MAIN T/G TRIP DUE TO LIGHTNING STRIKE- | | | | AT 0401, UNIT 2 AUTOMATICALLY TRIPPED FROM 100% POWER DUE TO A MAIN TURBINE | | GENERATOR TRIP SIGNAL CAUSED BY A LIGHTNING STRIKE DURING A SEVERE THUNDER | | STORM. ALL CONTROL RODS FULLY INSERTED INTO THE CORE. THE AUXILIARY | | FEEDWATER SYSTEM ACTUATED, AS EXPECTED, AND STEAM IS BEING DUMPED TO THE | | MAIN CONDENSER. NO SAFETY OR RELIEF VALVES LIFTED. THE 500 KV LINE TO | | WEST MacINTOSH TRIPPED APPARENTLY DUE TO THE LIGHTNING STRIKE. | | | | ALL SYSTEMS FUNCTIONED AS EXPECTED WITH THE FOLLOWING EXCEPTIONS: | | - OIL SPRAYED FROM THE PHASE 'A' MAIN STEPUP TRANSFORMER AND SEVERAL ALARMS | | ANNUNCIATED, AND | | - THE EHC SYSTEM IS INDICATING ZERO PRESSURE WITH BOTH SYSTEM PUMPS | | RUNNING. | | | | UNIT 2 IS STABLE IN MODE 3 (HOT STANDBY). THERE WERE NO PERSONNEL | | INJURIES. THE LICENSEE IS INVESTIGATING THIS EVENT AND INSPECTING THE | | PLANT FOR DAMAGE. | | | | THE STORM CAUSED NO ADVERSE AFFECTS TO UNIT 1. | | | | THE LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+