U.S. Nuclear Regulatory Commission Operations Center Event Reports For 07/24/96 - 07/25/96 ** EVENT NUMBERS ** 30721 30758 30782 30783 !!!!!!!!! THIS EVENT HAS BEEN RETRACTED. THIS EVENT HAS BEEN RETRACTED !!!!!!! +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 30721 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: NINE MILE POINT REGION: 1 |NOTIFICATION DATE: 07/08/96 | |UNIT: [ ] [2] [ ] STATE: NY |NOTIFICATION TIME: 16:56 [ET]| |RX TYPE: [1] GE-2,[2] GE-5 |EVENT DATE: 07/08/96 | +------------------------------------------------+EVENT TIME: 14:17[EDT]| |NRC NOTIFIED BY: KAHN |LAST UPDATE DATE: 07/24/96 | |HQ OPS OFFICER: CHAUNCEY GOULD +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |JIM TRAPP 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 | +-----+----------+-------+--------+-----------------+--------+-----------------+ | | | | | 2 | N Y 100 POWER OPERATION | 100 POWER OPERATION | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | THE LICENSEE DECLARED HPCS INOPERABLE (BUT AVAILABLE) AND ENTERED A 14-DAY | | LCO ACTION STATEMENT. | | | | THE CAUSE OF THE INOPERABILITY IS DUE TO SURVEILLANCE IDENTIFIED PROBLEMS | | INDICATING THAT A REDUCED FLOW OF COOLING WATER EXISTS TO THE UNIT COOLER | | IN THE HPCS SWITCHGEAR ROOM. PLANT PROCEDURES REQUIRE DECLARING THE | | SWITCHGEAR INOPERABLE (ALTHOUGH IT REMAINS AVAILABLE). WITH THE HPCS | | SWITCHGEAR INOPERABLE, HPCS IS ALSO INOPERABLE. THE CAUSE OF THE REDUCED | | FLOW IS DUE TO THE TWO CHECK VALVES IN THE COOLING WATER SUPPLY SYSTEM | | FAILING A SURVEILLANCE TEST. TWO VALVES FAILED THE FORWARD FLOW TEST, AND | | ONE VALVE FAILED THE REVERSE FLOW TEST. THE LICENSEE WILL ATTEMPT TO | | REPAIR THE VALVES. | | | | THE NRC RESIDENT INSPECTOR WILL BE INFORMED. | | | | * * * 1545 JULY 24, 1996, UPDATE FROM KAHN RECEIVED BY TROCINE * * * | | | | THE LICENSEE IS RETRACTING THIS EVENT BASED UPON SUBSEQUENT ENGINEERING | | ANALYSIS. THIS ANALYSIS HAS DETERMINED THAT ADEQUATE COOLING WATER FLOW | | EXISTS EVEN WITH THE CHECK VALVE FAILURES AND THAT THE SWITCHGEAR AND | | SUPPORTING EQUIPMENT WERE CAPABLE OF MEETING THEIR DESIGN FUNCTION. | | THEREFORE, THE LICENSEE HAS DETERMINED THAT THIS EVENT NOTIFICATION WAS NOT | | REQUIRED. | | | | THE LICENSEE HAS NOTIFIED THE NRC RESIDENT INSPECTOR. THE NRC OPERATIONS | | CENTER HAS NOTIFIED THE R1DO (MCFADDEN). | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 30758 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: SALEM REGION: 1 |NOTIFICATION DATE: 07/17/96 | |UNIT: [ ] [2] [ ] STATE: NJ |NOTIFICATION TIME: 16:48 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 07/17/96 | +------------------------------------------------+EVENT TIME: 13:30[EDT]| |NRC NOTIFIED BY: SAUER |LAST UPDATE DATE: 07/24/96 | |HQ OPS OFFICER: BOB STRANSKY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |DOLCE 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 | +-----+----------+-------+--------+-----------------+--------+-----------------+ | | | | | 2 | N N 0 REFUELING | 0 REFUELING | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | DISCOVERY OF CRACKED ROLL PIN IN REFURBISHED 4-KV CIRCUIT BREAKER | | | | DURING PRE-INSTALLATION TESTING OF A 4-KV GE CIRCUIT BREAKER, ELECTRICIANS | | NOTICED THAT THE INNER LATCH PAWL ON THE SPRING CHARGING MECHANISM WAS NOT | | ENGAGED WITH THE RATCHET MECHANISM. FURTHER INSPECTION REVEALED THAT THE | | SPRING RETAINER ROLL PIN HAD BROKEN ALONG ITS VERTICAL AXIS. THE FAILURE | | OF THESE PINS COULD CAUSE THE BREAKER TO FAIL TO OPEN OR CLOSE DUE TO THE | | FAILURE OF THE SPRING CHARGING MECHANISM. | | | | THE LICENSEE OBSERVED THAT THE BLOCK TO WHICH THE ROLL PIN WAS MOUNTED WAS | | ZINC PLATED. PREVIOUSLY, THE VENDOR (NLI) HAD EXPERIENCED PROBLEMS WITH | | HYDROGEN EMBRITTLEMENT OF HARDENED PARTS THAT WERE ZINC PLATED. THIS | | CONDITION HAS BEEN REPORTED TO THE INDUSTRY THROUGH AN INPO OPERATING | | EXPERIENCE REPORT DATED JUNE 5, 1996. THE LICENSEE REPORTED THAT A TOTAL | | OF 16 BREAKERS WHICH WERE RECENTLY REFURBISHED BY NLI HAVE BEEN INSTALLED. | | THE LICENSEE IS CURRENTLY PLANNING TO REPLACE AFFECTED BREAKERS IN SAFETY | | RELATED APPLICATIONS. | | | | THE NRC RESIDENT INSPECTOR HAS BEEN INFORMED BY THE LICENSEE. | | | | * * * 2019 JULY 24, 1996, FROM SAUER RECEIVED BY TROCINE * * * | | | | ADDITIONAL INFORMATION HAS BEEN DISCOVERED THROUGH CONTINUED INVESTIGATION | | OF THIS PROBLEM. SPECIFICALLY, THE REFURBISHMENT PROCESS USED BY THIS | | VENDOR HAS ALSO REMOVED A SURFACE PREPARATION USED IN VARIOUS PARTS WITHIN | | THE BREAKERS WHERE THERE ARE RUBBING OR ROLLING METAL PARTS (SUCH AS WHERE | | THE PROP AND PROP PIN ARE IN CONTACT). THIS SURFACE PREPARATION IS STATED | | BY GE IN THE BREAKER MANUAL TO BE FOR THE LIFE OF THE EQUIPMENT. THE NLI | | REFURBISHMENT PROCESS FAILED TO PROTECT OR RESTORE THE LUBRICATION COATING. | | BASED ON ENGINEERING JUDGMENT, THE COATING IS THERE TO PROTECT THESE PARTS | | AGAINST LONG-TERM DEGRADATION. THE BREAKERS WERE ALL SUBJECTED TO | | POST-MAINTENANCE TESTING THAT VALIDATED THEIR CAPABILITY TO OPERATE | | PROPERLY. | | | | CURRENTLY, BOTH SALEM UNITS ARE IN THE DEFUELED MODE, AND THERE IS ONLY ONE | | SAFETY-RELATED BREAKER INSTALLED IN THE PLANT AT THIS TIME. THIS BREAKER | | FEEDS A 460/230-V TRANSFORMER OFF OF THE 'B' 4-KV VITAL BUS. THE LICENSEE | | PLANS TO RESTORE THE 'A' VITAL BUS (WHICH IS CURRENTLY OUT OF SERVICE FOR | | MAINTENANCE) PRIOR TO REPLACEMENT OF THE AFFECTED BREAKER. THE BREAKER IS | | CURRENTLY CLOSED. THE LICENSEE BELIEVES THERE IS NO SIGNIFICANT IMPACT TO | | THE HEALTH AND SAFETY OF THE PUBLIC DUE TO THIS PROBLEM BECAUSE OF THE | | CURRENT MODE OF OPERATION. | | | | THE LICENSEE PLANS TO NOTIFY THE NRC RESIDENT INSPECTOR. THE NRC | | OPERATIONS CENTER NOTIFIED THE R1DO (MCFADDEN) | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 30782 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: DRESDEN REGION: 3 |NOTIFICATION DATE: 07/24/96 | |UNIT: [ ] [2] [3] STATE: IL |NOTIFICATION TIME: 14:56 [ET]| |RX TYPE: [1] GE-1,[2] GE-3,[3] GE-3 |EVENT DATE: 07/24/96 | +------------------------------------------------+EVENT TIME: 13:40[CDT]| |NRC NOTIFIED BY: DAVE SLAGER |LAST UPDATE DATE: 07/24/96 | |HQ OPS OFFICER: LEIGH TROCINE +-----------------------------+ +------------------------------------------------+ 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 | +-----+----------+-------+--------+-----------------+--------+-----------------+ | | | | | 2 | N N 0 COLD SHUTDOWN | 0 COLD SHUTDOWN | | 3 | N N 0 COLD SHUTDOWN | 0 COLD SHUTDOWN | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | REPORT OF SMOKE IN THE TECHNICAL SUPPORT CENTER DUE TO AN ELECTRICAL FAULT | | | | DUE TO A REPORT OF SMOKE IN THE TECHNICAL SUPPORT CENTER (TSC), VARIOUS | | ELECTRICAL SUPPLY BREAKERS WERE RACKED OUT. THE BREAKERS WILL REMAIN | | DE-ENERGIZED PENDING EVALUATION OF THE SOURCE OF SMOKE. AS A RESULT OF THE | | DEGRADED SUPPORT SYSTEMS IN THE TSC, THE TSC IS ALSO BEING CONSIDERED | | DEGRADED. VENTILATION, EMERGENCY LIGHTING, TELEPHONES, AND REQUIRED | | COMPUTER FUNCTIONS ARE AVAILABLE. AUXILIARY POWER (VIA EXTENSION CORDS) | | HAS BEEN USED FOR REQUIRED COMPUTER FUNCTIONS. | | | | THE SOURCE OF THE SMOKE APPEARED TO BE TWO EMERGENCY RECEPTACLES, AND THE | | LICENSEE IS CURRENTLY VERIFYING THE LOCATIONS OF THE POWER SUPPLIES FOR | | THESE CIRCUITS PER THE ELECTRICAL PRINTS. | | | | THE LICENSEE HAS NOTIFIED THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 30783 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: LIMERICK REGION: 1 |NOTIFICATION DATE: 07/25/96 | |UNIT: [1] [ ] [ ] STATE: PA |NOTIFICATION TIME: 04:33 [ET]| |RX TYPE: [1] GE-4,[2] GE-4 |EVENT DATE: 07/25/96 | +------------------------------------------------+EVENT TIME: 02:42[EDT]| |NRC NOTIFIED BY: BREEDING |LAST UPDATE DATE: 07/25/96 | |HQ OPS OFFICER: BOB STRANSKY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |MCFADDEN RDO | |ARPS 50.72(b)(2)(ii) RPS ACTUATION | | |AESF 50.72(b)(2)(ii) ESF ACTUATION | | |APRE 50.72(b)(2)(vi) OFFSITE NOTIFICATION | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | A/R Y 100 POWER OPERATION | 0 HOT SHUTDOWN | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | REACTOR SCRAM FROM 100% POWER DUE TO HIGH NEUTRON FLUX. | | | | WITH THE UNIT OPERATING AT 100% POWER, THE REACTOR AUTOMATICALLY SCRAMMED | | ON HIGH NEUTRON FLUX. THE LICENSEE REPORTED THAT AT LEAST ONE MAIN TURBINE | | CONTROL VALVE CYCLED, CAUSING A MOMENTARY PRESSURE SPIKE AND AN INCREASE IN | | NEUTRON FLUX. NO SAFETY/RELIEF VALVES LIFTED AS A RESULT OF THIS EVENT. | | FOLLOWING THE SCRAM, ALL CONTROL RODS INSERTED AND ALL SYSTEMS FUNCTIONED | | AS EXPECTED. REACTOR VESSEL WATER LEVEL DID NOT DECREASE FAR ENOUGH TO | | START EITHER HPCI OR RCIC. | | | | THE UNIT IS CURRENTLY STABLE IN CONDITION 3. THE LICENSEE INTENDS TO | | INVESTIGATE THE CAUSE OF THE CONTROL VALVE TRANSIENT. THE NRC RESIDENT | | INSPECTOR WILL BE INFORMED BY THE LICENSEE. THE LICENSEE PLANS TO MAKE A | | PRESS RELEASE REGARDING THIS EVENT. | +------------------------------------------------------------------------------+