U.S. Nuclear Regulatory Commission Operations Center Event Reports For 12/08/94 - 12/09/94 ** EVENT NUMBERS ** 28117 28118 28119 28120 28121 28122 +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28117 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: PALISADES REGION: 3 |NOTIFICATION DATE: 12/07/94 | |UNIT: [1] [ ] [ ] STATE: MI |NOTIFICATION TIME: 21:30 [ET]| |RX TYPE: [1] CE |EVENT DATE: 12/07/94 | +------------------------------------------------+EVENT TIME: 19:52[EST]| |NRC NOTIFIED BY: CAINE |LAST UPDATE DATE: 12/08/94 | |HQ OPS OFFICER: BOB STRANSKY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |JORGENSEN 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 | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | DURING SURVEILLANCE TESTING OF THE AUXILIARY FEEDWATER (AFW) SYSTEM, AN | | ELECTRICAL COMPONENT FAILED TO KEEP THE AFW CONTROL VALVES CLOSED, CAUSING | | AN UNANTICIPATED INJECTION TO THE STEAM GENERATORS. | | | | DURING A SURVEILLANCE TEST OF THE P-8A (MOTOR DRIVEN) AFW PUMP, THE AFW | | CONTROL VALVES OPENED UNEXPECTEDLY, CAUSING THE AFW SYSTEM TO INJECT | | APPROXIMATELY 165 GALLONS OF WATER TO EACH STEAM GENERATOR. THE MAIN | | FEEDWATER SYSTEM COMPENSATED FOR THE INJECTION AND MAINTAINED NORMAL STEAM | | GENERATOR LEVELS. THE LICENSEE SUSPECTS THAT A CONTACT IN A TEST SWITCH | | FAILED TO ENERGIZE A CIRCUIT WHICH WOULD HAVE INHIBITED THE OPENING OF THE | | VALVES. THE SWITCH HAS TWO CONTACTS, ONE FOR INDICATION LIGHTS, AND ONE | | FOR THE INHIBIT CIRCUIT. THE LICENSEE REPORTED THAT THE LIGHTS FUNCTIONED | | PROPERLY. | | | | THE TEST WAS IMMEDIATELY TERMINATED AND THE AFW SYSTEM RETURNED TO ITS | | STANDBY CONFIGURATION. MAINTENANCE TECHNICIANS WILL TROUBLESHOOT THE TEST | | SWITCH TOMORROW MORNING. THE NRC RESIDENT INSPECTOR WILL BE INFORMED BY | | THE LICENSEE. | | | | NOTE; SEE EVENT #28118 FOR A RELATED EVENT. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28118 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: PALISADES REGION: 3 |NOTIFICATION DATE: 12/08/94 | |UNIT: [1] [ ] [ ] STATE: MI |NOTIFICATION TIME: 07:55 [ET]| |RX TYPE: [1] CE |EVENT DATE: 12/08/94 | +------------------------------------------------+EVENT TIME: 06:57[EST]| |NRC NOTIFIED BY: MIKE MLYNAREK |LAST UPDATE DATE: 12/08/94 | |HQ OPS OFFICER: WILLIAM HUFFMAN +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: UNUSUAL EVENT +-----------------------------+ |10 CFR SECTION: |BRUCE JORGENSEN RDO | |AAEC 50.72(a)(1)(i) EMERGENCY DECLARED |AL CHAFFEE EO | |ASHU 50.72(b)(1)(i)(A) PLANT S/D REQD BY TS |RALPH HERSTO FEMA | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |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 +------------------------------------------------------------------------------+ | UNUSUAL EVENT DECLARED WHEN AUX FEEDWATER (AFW) FLOW CONTROLLERS DECLARED | | INOPERABLE. | | | | AT 0535 EST, A CONTROL ROOM OPERATOR OBSERVED THE FLOW CONTROLLERS FOR THE | | "A/B" AFW PUMPS (#FIC-0727 & 0749) WERE INDICATING THAT THE ASSOCIATED FLOW | | CONTROL VALVES WERE FULL OPEN. WHEN AFW IS IN STANDBY, THESE FLOW CONTROL | | VALVES SHOULD BE CLOSED. OPERATIONS STAFF IN THE FIELD CONFIRMED THAT THE | | VALVES WERE OPEN. THE LICENSEE ENTERED TECH SPEC 3.5.3 WHICH REQUIRES THAT | | THE PLANT BE IN HOT STANDBY WITHIN SIX HOURS WHEN BOTH FLOW CONTROLLERS ARE | | INOPERABLE. PLANT EMERGENCY ACTION LEVELS PLACE THE PLANT IN AN UNUSUAL | | EVENT CLASSIFICATION WHEN A TECH SPEC REQUIRED SHUTDOWN CONDITION EXISTS. | | AN UNUSUAL EVENT WAS DECLARED AT 0657 EST. | | | | I&C TECHNICIANS DETERMINED THAT ELECTRIC RELAY #SSX-3/P8A/B WAS BAD. THE | | RELAY WAS REPLACED AND OPERABILITY OF THE FLOW CONTROL VALVES WAS CONFIRMED | | THROUGH TESTING. THE TECH SPEC WAS EXITED AND THE UNUSUAL EVENT TERMINATED | | AT 0742 EST. | | | | THE LICENSEE BELIEVES THE PROBLEM REPORTED IN EVENT #28117 WAS DUE TO THE | | BAD RELAY. WHILE SURVEILLANCE TESTING ONE OF THE AFW PUMPS YESTERDAY, THE | | SAME FLOW CONTROL VALVES WENT OPEN FOR UNKNOWN REASONS. THE LICENSEE STATES | | THAT AS A RESULT OF THAT OCCURRENCE, THE "A/B" AFW TRAIN HAD BEEN DECLARED | | "DEGRADED" BUT WAS STILL CONSIDERED OPERABLE EVEN THOUGH THE ROOT CAUSE OF | | THE SURVEILLANCE PROBLEM HAD NOT BEEN DETERMINED. | | | | THE NRC RESIDENT, STATE AND LOCAL OFFICIALS HAVE BEEN NOTIFIED. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28119 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: DIABLO CANYON REGION: 4 |NOTIFICATION DATE: 12/08/94 | |UNIT: [1] [2] [ ] STATE: CA |NOTIFICATION TIME: 11:30 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 12/08/94 | +------------------------------------------------+EVENT TIME: 07:30[PST]| |NRC NOTIFIED BY: BOB MAGRUDER |LAST UPDATE DATE: 12/08/94 | |HQ OPS OFFICER: WILLIAM HUFFMAN +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |IAN BARNES RDO | |AENS 50.72(b)(1)(v) ENS INOPERABLE | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |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 Y 100 POWER OPERATION | 100 POWER OPERATION | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | SIGNIFICANT LOSS OF TELEPHONE COMMUNICATION CAPABILITY. | | | | THE LICENSEE REPORTED A SIGNIFICANT LOSS OF TELEPHONE COMMUNICATION | | CAPABILITY FROM THE SITE. THE LOSS AFFECTED THE EMERGENCY NOTIFICATION | | SYSTEM (ENS); LONG DISTANCE COMMERCIAL; AND SOME LOCAL COMMUNICATION LINES. | | THE LICENSEE VERIFIED THAT THEY COULD STILL CONTACT STATE AND LOCAL | | EMERGENCY RESPONSE AUTHORITIES USING LOCAL LINES. THE CAUSE APPEARS TO BE | | RELATED TO PROBLEMS WITH PACIFIC BELL. NO DETAILS WERE AVAILABLE. | | | | THE LICENSEE CONTACTED THE NRC OPERATIONS CENTER USING A LOCAL LINE TO THE | | NRC WALNUT CREEK FIELD OFFICE WHICH THEN RELAYED THE CALL TO THE OPERATIONS | | CENTER. THE LICENSEE WAS UNABLE TO USE THEIR CORPORATE LINES TO ESTABLISH | | COMMUNICATIONS APPARENTLY DUE TO THE EXTENT OF THE PACIFIC BELL PROBLEM. | | | | VERIFICATION OF REDUNDANT COMMUNICATIONS CAPABILITY USING A CELLULAR PHONE; | | LOAD DISPATCHER MICROWAVE LINK; AND OTHER POTENTIAL SWITCHBOARD CONNECTIONS | | WERE BEING PURSUED WHEN THE ENS LINE TO THE NRC WAS RESTORED. THE ENS LINE | | WAS VERIFIED OPERABLE IN BOTH DIRECTIONS AND DECLARED OPERABLE AT 11:43 | | EST. | | | | THE NRC RESIDENT INSPECTOR; STATE; AND LOCAL AUTHORITIES WERE ALL AWARE OF | | THE PHONE PROBLEMS. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28120 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: COOPER REGION: 4 |NOTIFICATION DATE: 12/08/94 | |UNIT: [1] [ ] [ ] STATE: NE |NOTIFICATION TIME: 15:10 [ET]| |RX TYPE: [1] GE-4 |EVENT DATE: 12/07/94 | +------------------------------------------------+EVENT TIME: 16:29[CST]| |NRC NOTIFIED BY: BILLESBACH |LAST UPDATE DATE: 12/08/94 | |HQ OPS OFFICER: CHAUNCEY GOULD +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |IAN BARNES 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 +------------------------------------------------------------------------------+ | THE PLANT HAD A LOSS OF THEIR FIRE PROTECTION SYSTEM DUE TO THE LOSS OF THE | | 12.5KV SYSTEM. | | | | THIS REPORT IS BEING MADE IN COMPLIANCE WITH TS 3.15.C.2.a AS A 24 HR | | REPORT. THE LOSS OF THE 12.5KV SYSTEM MADE THE "E" FIRE PUMP INOPERABLE. | | ALSO THE FIRE JOCKEY PUMP, WHICH MAINTAINS THE FIRE HEADER PRESSURE ABOVE | | THE AUTOMATIC START OF THE FIRE PUMPS, BECAME INOPERABLE. UPON RECEIPT OF | | THE LOW HEADER PRESSURE ALARM AND PER THE ABNORMAL PROCEDURE FOR LOSS OF | | THE 12.5KV SYSTEM, THE "D" FIRE PUMP CONTROL SWITCH WAS PLACED IN THE | | PULL-TO-LOCK (PTL) POSITION AND THE FIRE FLUSHING PUMP WAS STARTED. THE | | FIRE FLUSHING PUMP CANNOT MAINTAIN THE HEADER PRESSURE ABOVE THE "D" FIRE | | PUMP AUTOMATIC START, WHICH IS WHY IT IS PLACED IN PTL POSITION. THUS THE | | TWO FIRE PUMPS, "D" & "E" BECAME INOPERABLE. | | | | THE PLANT HAS THREE FIRE PUMPS, TWO ELECTRIC AND ONE DIESEL. WITH THE LOSS | | OF THE 12.5KV SYSTEM, "E" FIRE PUMP(ELECTRIC) WAS INOPERABLE, AND THE "D" | | FIRE PUMP(DIESEL) WAS INOPERABLE DUE TO NOT BEING CAPABLE OF AUTOMATIC | | STARTING UNDER LOW HEADER PRESSURE WITH THE CONTROL SWITCH IN THE PTL | | POSITION. THE THIRD FIRE PUMP, "C"(ELECTRIC), IS NOT CAPABLE OF DELIVERING | | THE TS REQUIRED 2000GPM. | | | | THE "D" PUMP COULD HAVE BEEN STARTED, IF AN ACTUAL FIRE ALARM HAD BEEN | | RECEIVED, BY PLACING THE CONTROL SWITCH IN AUTO OR MANUAL AND STARTED IT | | THAT WAY. THE "D" PUMP CAN PROVIDE FLOW AND PRESSURE NEEDED FOR FIRE | | SUPPRESSION CAPABILITY. THE "C" FIRE PUMP WOULD HAVE SERVED AS BACKUP. | | | | SECURITY DID PROVIDE FOUR HOUR FIRE WATCHES. | | | | THEY ARE STILL INVESTIGATING THE CAUSE OF THE LOSS OF THE 12.5KV SYSTEM, | | BUT THEY RESTORED IT FROM AN ALTERNATE SOURCE AND THE "D" & "E" FIRE PUMPS | | WERE ALSO RESTORED TO OPERABLE SERVICE AT 20:18. | | | | THE RI WILL BE NOTIFIED. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28121 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: OCONEE REGION: 2 |NOTIFICATION DATE: 12/08/94 | |UNIT: [ ] [2] [ ] STATE: SC |NOTIFICATION TIME: 16:00 [ET]| |RX TYPE: [1] B&W-L-LP,[2] B&W-L-LP,[3] B&W-L-LP |EVENT DATE: 12/08/94 | +------------------------------------------------+EVENT TIME: 14:25[EST]| |NRC NOTIFIED BY: OWENS |LAST UPDATE DATE: 12/08/94 | |HQ OPS OFFICER: CHAUNCEY GOULD +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |JACK CRLENJAK 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 | A/R Y 100 POWER OPERATION | 0 HOT SHUTDOWN | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | THE PLANT HAD A REACTOR TRIP FROM 100% POWER. | | | | THIS TRIP WAS THE RESULT OF AN ANTICIPATORY RPS TRIP ON A LOSS OF BOTH MAIN | | FEEDWATER PUMPS. THE FEEDWATER PUMPS TRIPPED AS A RESULT OF A FALSE HIGH | | STEAM GENERATOR LEVEL(PER DESIGN) WHEN THE INTEGRATED CONTROL SYSTEM AUTO | | POWER BREAKER TRIPPED. THE CAUSE OF THIS BREAKER TRIPPING IS UNDER | | INVESTIGATION AT THIS TIME. ALL RODS FULLY INSERTED AND ALL RELIEF VALVES | | LIFTED AND FULLY RESEATED. THE HEAT SINK IS THE CONDENSER. THE REACTOR IS | | STABLE IN HOT S/D. THE RI WAS INFORMED. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28122 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: MILLSTONE REGION: 1 |NOTIFICATION DATE: 12/08/94 | |UNIT: [ ] [2] [ ] STATE: CT |NOTIFICATION TIME: 16:33 [ET]| |RX TYPE: [1] GE-3,[2] CE,[3] W-4-LP |EVENT DATE: 12/08/94 | +------------------------------------------------+EVENT TIME: 16:30[EST]| |NRC NOTIFIED BY: BONNER |LAST UPDATE DATE: 12/08/94 | |HQ OPS OFFICER: CHAUNCEY GOULD +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |PETER ESELGROTH 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 +------------------------------------------------------------------------------+ | THE LICENSEE REPORTED A DEGRADED FLOOR DRAIN SYSTEM DUE TO LEAKING | | CONNECTIONS. | | | | THE LICENSEE DISCOVERED DURING A DESIGN REVIEW THAT THEY HAD DEGRADED FLOOR | | DRAINAGE SYSTEM WHICH PROVIDES AN OPEN PATH BETWEEN TWO ELECTRICAL | | FACILITIES AND THEREFORE DESIGN BASIS REQUIREMENTS FOR SEPARATION OF | | FACILITIES AGAINST FLOODING IS NOT SATISFIED. THIS MEANS THAT A COOLING | | WATER FAILURE IN ONE OF THE ELECTRICAL FACILITIES WOULD AFFECT THE OTHER | | ELECTRICAL FACILITY. ALL WATER SOURCES IN THE AREA HAVE BEEN ISOLATED. THEY | | WILL BE MAKING REPAIRS TO THE DEGRADED DRAINS. THE RI, STATE AND LOCAL | | AGENCIES HAVE BEEN NOTIFIED. | +------------------------------------------------------------------------------+