U.S. Nuclear Regulatory Commission Operations Center Event Reports For 12/12/94 - 12/13/94 ** EVENT NUMBERS ** 28132 28135 28136 28137 28138 28139 28140 28141 +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28132 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: VERMONT YANKEE REGION: 1 |NOTIFICATION DATE: 12/11/94 | |UNIT: [1] [ ] [ ] STATE: VT |NOTIFICATION TIME: 09:53 [ET]| |RX TYPE: [1] GE-4 |EVENT DATE: 12/11/94 | +------------------------------------------------+EVENT TIME: 09:15[EST]| |NRC NOTIFIED BY: BRYAN COKE |LAST UPDATE DATE: 12/12/94 | |HQ OPS OFFICER: STEVE SANDIN +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |PETER ESELGROTH 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 +------------------------------------------------------------------------------+ | THE DEDICATED LAND LINE TO THE STATE OF NEW HAMPSHIRE IS NOT FUNCTIONING | | PROPERLY. | | | | WHILE PERFORMING A MONTHLY COMMUNICATIONS CHECK, IT WAS DISCOVERED THAT THE | | STATE OF NEW HAMPSHIRE WAS UNABLE TO CALL THE SITE ON THE NUCLEAR ALERT | | SYSTEM PHONE. THE SITE IS ABLE TO CONTACT THEM, HOWEVER, THE SIGNAL IS | | WEAK. THE NEW HAMPSHIRE EMERGENCY MANAGEMENT DEPARTMENT CONTACTED THE | | TELEPHONE COMPANY NYNEX. NYNEX IDENTIFIED THAT THE PROBLEM WAS RELATED TO A | | CABLE AND THAT REPAIRS WOULD BE COMPLETED TODAY. THE LICENSEE WILL INFORM | | THE STATE OF VERMONT AND THE NRC RESIDENT INSPECTOR. | | | | ***UPDATE 12/12/94 @ 1548 BY S WOOKEY TAKEN BY MACKINNON*** | | | | DEDICATED LAND LINE RETURNED TO SERVICE AT 1537 ET. R1DO (LARRY NICHOLSON) | | NOTIFIED. | | | | LICENSEE NOTIFIED RESIDENT INSPECTOR AND STATE THAT THE LAND LINE WAS | | RESTORED TO SERVICE. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28135 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: SEABROOK REGION: 1 |NOTIFICATION DATE: 12/12/94 | |UNIT: [1] [ ] [ ] STATE: NH |NOTIFICATION TIME: 16:20 [ET]| |RX TYPE: [1] W-4-LP |EVENT DATE: 12/12/94 | +------------------------------------------------+EVENT TIME: 11:55[EST]| |NRC NOTIFIED BY: M DeBay |LAST UPDATE DATE: 12/12/94 | |HQ OPS OFFICER: JOHN MacKINNON +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |LARRY NICHOLSON RDO | |APRE 50.72(b)(2)(vi) OFFSITE NOTIFICATION | | | |BILL BEEHCER PAO | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |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 +------------------------------------------------------------------------------+ | LICENSEE AT 1547ET DECIDED TO ISSUE A NEWS RELEASE ON THE FOLLOWING | | INCIDENT. | | | | A 1985 GMC VAN GOING SOUTH ON ROUTE 107 LOST ITS BRAKES. THE VAN CROSSED | | ROUTE 1, HITTING A CAR, CRASHED THROUGH LICENSEE'S SOUTH ROAD GATE (ON | | ROUTE 1) AND THEN ROLLED APPROXIMATELY 200 YARDS UP THE SOUTH ACCESS ROAD | | (OWNERS CONTROLLED AREA ROAD) BEFORE COMING TO A COMPLETE STOP. SITE | | SECURITY RESPONDED TO THE SCENE AND FOUND THAT THE VAN DRIVER WAS NOT | | INJURED. VAN AND DRIVER WERE ESCORTED OFFSITE. DRIVER OF THE CAR WHICH WAS | | HIT BY THE VAN WAS NOT INJURED. LICENSEE NOTIFIED LOCAL AUTHORITIES OF THIS | | INCIDENT. | | | | RESIDENT INSPECTOR WAS INFORMED BY THE LICENSEE. | | | | | | | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |GENERAL INFORMATION or OTHER | |EVENT NUMBER: 28136 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |LICENSEE: DOW CORNING CORPORATION |NOTIFICATION DATE: 12/12/94 | | CITY: MIDLAND REGION: 3 |NOTIFICATION TIME: 18:10 [ET]| | COUNTY: STATE: MI |EVENT DATE: 12/12/94 | |LICENSE#: AGREEMENT: N |EVENT TIME: 00:00[EST]| | DOCKET: |LAST UPDATE DATE: 12/12/94 | | +-----------------------------+ | |PERSON ORGANIZATION| | | | | | | +------------------------------------------------+ | |NRC NOTIFIED BY: | | |HQ OPS OFFICER: JOHN MacKINNON | | +------------------------------------------------+ | |EMERGENCY CLASS: NOT APPLICABLE | | |10 CFR SECTION: | | |CCCC 21.21 UNSPECIFIED PARAGRAPH | | | | | | | | | | | | | | +------------------------------------------------+-----------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | DOW CORNING CORPORATION, MIDLAND, MI SENT THE FOLLOWING PART 21 FAX. | | | | "DOW CORNING HAS EVIDENCE SUGGESTING THAT THE DEVIATION FROM OUR SALES | | SPECIFICATIONS ON DOW CORNING 96-081 RTV ADHESIVE/SEALANT FOR FLAME | | SELF-EXTINGUISH TIME AS TESTED PER CTM 0316 'A' IS RELATED TO IMPURITIES IN | | A PIGMENT USED IN THIS MATERIAL. DOW CORNING HAS BEEN WORKING IN | | CONJUNCTION WITH UNDERWRITERS LABORATORIES TO UNDERSTAND THE CORRELATION, | | IN ANY, BETWEEN FLAME SELF-EXTINGUISH TIME TESTING AND THROUGH-PENETRATION | | FIRE PERFORMANCE." | | | | SEE RELATED REPORT #28079. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |GENERAL INFORMATION or OTHER | |EVENT NUMBER: 28137 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |LICENSEE: LAWRENCE LIVERMORE LAB |NOTIFICATION DATE: 12/12/94 | | CITY: LIVERMORE REGION: 4 |NOTIFICATION TIME: 19:33 [ET]| | COUNTY: STATE: CA |EVENT DATE: 12/12/94 | |LICENSE#: AGREEMENT: Y |EVENT TIME: 11:45[PST]| | DOCKET: |LAST UPDATE DATE: 12/12/94 | | +-----------------------------+ | |PERSON ORGANIZATION| | |BILL JOHNSON RDO | | | | +------------------------------------------------+ | |NRC NOTIFIED BY: GARNEAU | | |HQ OPS OFFICER: JOHN MacKINNON | | +------------------------------------------------+ | |EMERGENCY CLASS: NOT APPLICABLE | | |10 CFR SECTION: | | |NINF INFORMATION ONLY | | | | | | | | | | | | | | +------------------------------------------------+-----------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | PETTY OFFICER GARNEAU OF THE NATIONAL RESPONSE CENTER GAVE THE FOLLOWING | | REPORT. | | | | NATIONAL RESPONSE CENTER WAS INFORMED BY LAWRENCE LIVERMORE LAB. THAT 0.19 | | CURIES OF URANIUM-238 CONTAINED IN A SHIPPING BOX WAS RELEASED DURING | | MOVEMENT AT THE SITE. THE MATERIAL WAS CLEANED UP AND ALL THE ASPHALT | | CONTAMINATED BY THE SPILL WAS CLEANED UP. NOBODY WAS CONTAMINATED BY THE | | SPILL. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28138 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: COOPER REGION: 4 |NOTIFICATION DATE: 12/12/94 | |UNIT: [1] [ ] [ ] STATE: NE |NOTIFICATION TIME: 19:37 [ET]| |RX TYPE: [1] GE-4 |EVENT DATE: 12/11/94 | +------------------------------------------------+EVENT TIME: 15:08[CST]| |NRC NOTIFIED BY: D BILLESBACH |LAST UPDATE DATE: 12/12/94 | |HQ OPS OFFICER: JOHN MacKINNON +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |BILL JOHNSON RDO | |NLTR LICENSEE 24 HR REPORT | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |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 +------------------------------------------------------------------------------+ | PLANNED LOSS OF THE 12.5 KV SYSTEM TO PERFORM RESTORATION FROM EVENT | | #28120 ON 12/08/94. | | | | THE CAUSE OF EVENT #28120 WAS A BLOWN LIGHTNING ARRESTOR. THE PURPOSE OF | | THIS REPORT IS TO COMPLY WITH TECH SPEC 3.15.C.2.a (24 HOUR REPORT ON LOSS | | OF THE FIRE SUPPRESSION SYSTEM). | | | | WITH THE LOSS OF THE 12.5KV SYSTEM, E FIRE PUMP BECAME INOPERABLE DIRECTLY | | DUE TO IT BEING POWERED FROM THE 12.5 KV SYSTEM. ALSO, THE FIRE JOCKEY | | PUMP, WHICH MAINTAINS THE FIRE HEADER PRESSURE ABOVE THE AUTOMATIC START OF | | THE FIRE PUMPS BECAME INOPERABLE. PRIOR TO THE PLANNED LOSS OF THE 12.5 KV | | SYSTEM, D FIRE PUMP CONTROL SWITCH WAS PLACED IN THE PULL-TO-LOCK POSITION | | AND THE FIRE FLUSHING PUMP WAS STARTED PER THE PROCEDURE FOR TRANSFERRING | | THE SOURCE FOR THE 12.5 KV SYSTEM. THE FIRE FLUSHING PUMP CANNOT MAINTAIN | | THE HEADER PRESSURE ABOVE THE D FIRE PUMP AUTOMATIC START, WHICH IS WHY IT | | IS PLACED IN THE PULL-TO-LOCK POSITION. THUS, THE TWO FIRE PUMPS, D AND E, | | BECAME INOPERABLE AT 1508 CST, WHEN THE 12.5 KV SYSTEM WAS IN THE PROCESS | | OF BEING TRANSFERRED. | | | | COOPER NUCLEAR STATION HAS THREE FIRE PUMPS, TWO ELECTRIC AND ONE DIESEL. | | WITH THE LOSS OF THE 12.5 KV SYSTEM, E FIRE PUMP (ELECTRIC) WAS INOPERABLE, | | AND D FIRE PUMP (DIESEL) WAS INOPERABLE DUE TO NOT CAPABLE OF AUTOMATIC | | STARTING UPON LOW HEADER PRESSURE WITH THE CONTROL SWITCH IN PULL-TO-LOCK. | | THE THIRD FIRE PUMP, C (ELECTRIC), IS NOT CAPABLE OF DELIVERING 2000 gpm | | WHICH IS THE TECH SPEC REQUIREMENT FOR OPERABILITY. | | | | SHOULD AN ACTUAL FIRE ALARM HAVE BEEN RECEIVED THAT HAD REQUIRED THE FIRE | | PUMPS TO PROVIDE FLOW AND PRESSURE, THE CONTROL SWITCH FOR D FIRE PUMP | | WOULD HAVE BEEN ABLE TO BE PLACED IN THE AUTO POSITION WHERE IT WOULD HAVE | | STARTED OR TO MANUAL AND START IT THAT WAY. D FIRE PUMP BY ITSELF CAN | | PROVIDE THE FLOW AND PRESSURE NEEDED FOR FIRE SUPPRESSION CAPABILITY AND | | WITH C FIRE PUMP AS A BACKUP FROM THE MISSOURI RIVER. | | | | THE 12.5 KV SYSTEM WAS RESTORED AT 1827 CT FROM THE ALTERNATE SOURCE AGAIN | | AND THE RING BUS RESTORED. THE RETURN TO THE ALTERNATE SOURCE WAS DUE TO | | THE BREAKER ON THE SECONDARY SIDE OF THE 13.8/12.5 KV TRANSFORMER (T-3) DID | | NOT CLOSE. ALSO AT 1827 CT FIRE PUMPS E AND D WERE RESTORED TO AN OPERABLE | | STATUS. | | | | RESIDENT INSPECTOR WAS INFORMED OF THIS EVENT. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28139 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: HOPE CREEK REGION: 1 |NOTIFICATION DATE: 12/12/94 | |UNIT: [1] [ ] [ ] STATE: NJ |NOTIFICATION TIME: 21:03 [ET]| |RX TYPE: [1] GE-4 |EVENT DATE: 12/12/94 | +------------------------------------------------+EVENT TIME: 16:00[EST]| |NRC NOTIFIED BY: MOHNEY |LAST UPDATE DATE: 12/12/94 | |HQ OPS OFFICER: JOHN MacKINNON +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |LARRY NICHOLSON 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 | 99 POWER OPERATION | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | LICENSEE EXCEEDED MAXIMUM TECH SPEC THERMAL POWER LIMIT OF 3293 MEGAWATTS | | THERMAL. | | | | LICENSEE VIOLATED 2.C.1 PARAGRAPH 1 OF THEIR LICENSE (MAX POWER LIMIT). | | PRELIMINARY RESULTS OF A GENERAL ELECTRIC FEEDWATER FLOW NOZZLE TRACER TEST | | FOR THE PURPOSES OF CALIBRATING THE NOZZLES INDICATED "B" FEEDWATER FLOW | | NOZZLE OUT OF CALIBRATION. THE MEASURED FLOW WAS 0.47% IN THE NON | | CONSERVATIVE DIRECTION (FEEDWATER FLOW HIGHER THAN INDICATED FLOW). | | THEREFORE, REACTOR HAD BEEN OPERATING AT AN ACTUAL POWER 15.4 MEGAWATTS | | THERMAL ABOVE THE INDICATED MAXIMUM OF 100% POWER LEVEL (3293 MEGAWATTS | | THERMAL) WHICH IS 100.5% FOR AN UNDETERMINED AMOUNT OF TIME (LAST TIME FLOW | | NOZZLE CHECKED WAS IN THE SPRING OF 1989). LICENSEE SAID THAT THE | | NONCONSERVATIVE ERROR WAS A KNOWN POSSIBILITY OF THE FEEDWATER FLOW NOZZLE | | CALCULATION PROCEDURE. | | | | OPERATORS REDUCED REACTOR POWER AND MAINTAINING A MAXIMUM THERMAL POWER | | LIMIT OF 3277 MEGAWATTS THERMAL (99.5%) INDICATED UNTIL THE CALIBRATION | | PROCESS IS COMPLETED. "A" FEEDWATER FLOW NOZZLE PASSED ITS CALIBRATION | | CHECK EARLIER. | | | | RESIDENT INSPECTOR WAS INFORMED BY THE LICENSEE. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28140 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: LASALLE REGION: 3 |NOTIFICATION DATE: 12/13/94 | |UNIT: [1] [ ] [ ] STATE: IL |NOTIFICATION TIME: 01:05 [ET]| |RX TYPE: [1] GE-5,[2] GE-5 |EVENT DATE: 12/12/94 | +------------------------------------------------+EVENT TIME: 21:33[CST]| |NRC NOTIFIED BY: SPIELER |LAST UPDATE DATE: 12/13/94 | |HQ OPS OFFICER: STEVE SANDIN +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |JIM MCCORMICKBARGER RDO | |ARPS 50.72(b)(2)(ii) RPS ACTUATION | | |AESF 50.72(b)(2)(ii) ESF ACTUATION | | |AINA 50.72(b)(2)(iii)(A) POT UNABLE TO SAFE SD | | |NLCO TECH SPEC LCO A/S | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | A/R Y 92 POWER OPERATION | 0 HOT SHUTDOWN | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | UNIT 1 EXPERIENCED A REACTOR SCRAM DUE TO A SPURIOUS MSIV CLOSURE DURING | | MAINTENANCE TESTING OF SPURIOUS HIGH MSL FLOW SIGNALS. | | | | "UNIT ONE REACTOR SCRAMMED FROM 92% POWER ON 12/12/94 AT 2133. THE | | AUTOMATIC SCRAM WAS GENERATED BY A SPURIOUS CLOSURE OF THE MAIN STEAM | | ISOLATION VALVES (MSIVs). THE AUTOMATIC MSIV ISOLATION WAS INITIATED AFTER | | RECEIVING SPURIOUS HI MSL FLOW SIGNALS. INSTRUMENT MAINTENANCE TESTING OF | | THE HI MAIN STEAM LINE FLOW INSTRUMENTATION WAS IN PROGRESS AT THE TIME OF | | THE MSIV ISOLATION/REACTOR SCRAM." | | | | "ALL EQUIPMENT RESPONDED AS EXPECTED FOR THE TRANSIENT. ALL RODS WENT FULL | | IN AND THE CONDENSATE/FEEDWATER SYSTEM WAS USED TO MAINTAIN REACTOR WATER | | LEVEL. MULTIPLE SAFETY RELIEF VALVES OPENED AUTOMATICALLY TO CONTROL | | REACTOR PRESSURE 700-1000 PSI." | | | | "DURING THE EVENT, SHRINK AND SWELL OF REACTOR VESSEL LEVEL CAUSED BY SRV | | ACTUATIONS CAUSED RCIC TURBINE TRIPS, FEEDWATER SYSTEM TRIPS AND TWO | | ADDITIONAL REACTOR SCRAMS ON LOW LEVEL." | | | | "EMERGENCY OPERATING PROCEDURES FOR VESSEL LEVEL, VESSEL PRESSURE AND | | PRIMARY CONTAINMENT WERE ENTERED. RESIDUAL HEAT REMOVAL (RHR) SYSTEMS "A" | | AND "B" WERE STARTED IN THE SUPPRESSION POOL COOLING MODE TO CONTROL POOL | | TEMPERATURE. THE HIGHEST TEMPERATURE HAS BEEN 113 DEGREES." | | | | "REACTOR WATER CLEANUP ISOLATED ON DIFFERENTIAL FLOW DUE TO LEVEL AND | | PRESSURE OSCILLATION FROM CYCLING OF THE SAFETY RELIEF VALVES." | | | | "AS A RESULT OF PLACING BOTH RHR SYSTEMS IN SUPPRESSION POOL COOLING, | | TECHNICAL SPECIFICATION 3.0.3 WAS ENTERED AS THE INJECTIONS SYSTEMS WERE | | ADMINISTRATIVELY INOPERABLE." | | | | UNIT 1 HAS BEEN OPERATING SEVERAL MONTHS PRIOR TO THE SCRAM. DECAY HEAT IS | | CURRENTLY BEING REMOVED VIA RCIC AND MAIN STEAM LINE DRAINS TO THE MAIN | | CONDENSER. THE UNIT WILL REMAIN IN HOT SHUTDOWN PENDING THE RESULTS OF THE | | INVESTIGATION INTO THE CAUSE OF THE MSIV CLOSURE (A REVIEW OF THE FIRST OUT | | LOG SHOWED THAT THE SCRAM SIGNAL WAS FROM THE MSIV POSITION LIMIT | | SWITCHES). THE LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28141 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: COOPER REGION: 4 |NOTIFICATION DATE: 12/13/94 | |UNIT: [1] [ ] [ ] STATE: NE |NOTIFICATION TIME: 05:34 [ET]| |RX TYPE: [1] GE-4 |EVENT DATE: 12/12/94 | +------------------------------------------------+EVENT TIME: 21:00[CST]| |NRC NOTIFIED BY: DOUGLAS BILLESBACH |LAST UPDATE DATE: 12/13/94 | |HQ OPS OFFICER: STEVE SANDIN +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: | | |NLTR LICENSEE 24 HR REPORT | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |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 +------------------------------------------------------------------------------+ | PLANNED LOSS OF THE 12.5 KV SYSTEM TO PERFORM RESTORATION. SEE SIMILAR | | EVENTS #28120 AND #28138. | | | | "ON 12 DEC 94, AT 2100 HRS CENTRAL, A PLANNED LOSS OF THE 12.5 KV SYSTEM | | OCCURRED. THIS PLANNED OUTAGE WAS TO REALIGN THE SOURCE OF POWER FOR THE | | 12.5 KV SYSTEM TO THE NORMAL FEED. THE PURPOSE OF THE SPECIAL REPORT IS TO | | COMPLY WITH TECH SPEC. 3.15.C.2.a, BY PROVIDING THIS SPECIAL REPORT VIA | | TELEPHONE WITHIN 24 HOURS OF THE LOSS OF THE FIRE SUPPRESSION SYSTEM." | | | | "WITH THE LOSS OF THE 12.5 KV SYSTEM, "E" FIRE PUMP BECOMES INOPERABLE | | DIRECTLY DUE TO IT BEING POWERED FROM THE 12.5 KV SYSTEM. ALSO, THE FIRE | | JOCKEY PUMP, WHICH MAINTAINS THE FIRE HEADER PRESSURE ABOVE THE AUTOMATIC | | START OF THE FIRE PUMPS BECOMES INOPERABLE. STATION PROCEDURES DIRECT THE | | OPERATORS TO PLACE BOTH "E" AND "D" FIRE PUMPS IN THE PULL-TO-LOCK POSITION | | AND START THE FIRE FLUSHING PUMP. THIS IS IN PREPARATION FOR THE LOSS OF | | THE FIRE JOCKEY PUMP AND ITS ABILITY TO MAINTAIN SYSTEM PRESSURE. WHILE "D" | | FIRE PUMP WAS UNAFFECTED BY THE LOSS OF POWER, ITS AUTOMATIC START PRESSURE | | SETTING IS TOO HIGH FOR THE FIRE FLUSHING PUMP TO MAINTAIN OFF, SO ITS | | CONTROL SWITCH IS PLACED IN THE PTL POSITION. THUS, THE TWO FIRE PUMPS, "D" | | AND "E", BECAME INOPERABLE AT 2100, WHEN THEIR CONTROL SWITCHES WERE PLACED | | IN PULL-TO-LOCK." | | | | "CNS HAS THREE FIRE PUMPS, TWO ELECTRIC AND ONE DIESEL. WITH THE LOSS OF | | THE 12.5 KV SYSTEM, "E" FIRE PUMP (ELECTRIC) IS INOPERABLE, AND "D" FIRE | | PUMP (DIESEL IS INOPERABLE DUE TO NOT CAPABLE OF AUTOMATIC START UPON LOW | | HEADER PRESSURE WITH THE CONTROL SWITCH IN PTL. THE THIRD FIRE PUMP, "C" | | (ELECTRIC), IS NOT CAPABLE OF DELIVERING 2000 GPM WHICH IS THE TECH SPEC | | REQUIREMENT FOR OPERABILITY." | | | | "SHOULD AN ACTUAL FIRE ALARM HAVE BEEN RECEIVED THAT HAD REQUIRED THE FIRE | | PUMPS TO PROVIDE FLOW AND PRESSURE, THE CONTROL SWITCH FOR "D" FIRE PUMP | | WOULD HAVE BEEN ABLE TO BE PLACED IN THE AUTO POSITION WHERE IT WOULD HAVE | | STARTED OR TO MANUAL AND START IT THAT WAY. "D" FIRE PUMP CAN PROVIDE FLOW | | AND PRESSURE NEEDED FOR FIRE SUPPRESSION CAPABILITY BY ITSELF WITH "C" FIRE | | PUMP AS A BACKUP FROM THE MISSOURI RIVER." | | | | "AS COMPENSATORY MEASURES DURING THIS LOSS OF POWER, STATION SECURITY WAS | | CONTACTED TO PROVIDE FOUR HOUR FIRE PATROL OF THE AFFECTED BUILDINGS | | POWERED FROM THE 12.5 KV SYSTEM." | | | | "AT 2132 THE 12.5 KV SYSTEM WAS RESTORED TO ITS NORMAL SOURCE AND THE RING | | BUS RESTORED. AT 2243 FIRE PUMPS "E" AND "D" WERE RESTORED TO AN OPERABLE | | STATUS. AT ~2315 POWER WAS RESTORED TO THE REMAINING BUILDINGS AFFECTED BY | | THE OUTAGE AND THE FOUR HOUR FIRE PATROL WAS SECURED." | | | | THE LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+