U.S. Nuclear Regulatory Commission Operations Center Event Reports For 09/14/94 - 09/15/94 ** EVENT NUMBERS ** 27781 27783 27784 27785 +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27781 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: CATAWBA REGION: 2 |NOTIFICATION DATE: 09/13/94 | |UNIT: [ ] [2] [ ] STATE: SC |NOTIFICATION TIME: 20:55 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 09/13/94 | +------------------------------------------------+EVENT TIME: 18:54[EDT]| |NRC NOTIFIED BY: CLEMENTS |LAST UPDATE DATE: 09/15/94 | |HQ OPS OFFICER: BOB STRANSKY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |LAWYER RDO | |ARPS 50.72(b)(2)(ii) RPS ACTUATION | | |AESF 50.72(b)(2)(ii) ESF 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 STANDBY | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | AUTOMATIC REACTOR TRIP DUE TO CLOSURE OF MAIN STEAM ISOLATION VALVE. | | | | AN AUTOMATIC REACTOR/TURBINE TRIP OCCURRED ON OVERPOWER DIFFERENTIAL | | TEMPERATURE AFTER THE "C" MSIV CLOSED UNEXPECTEDLY. THE AUXILIARY | | FEEDWATER SYSTEM AUTOMATICALLY STARTED AS EXPECTED FOLLOWING THE TRIP DUE | | TO LOW STEAM GENERATOR LEVEL. A FULL MSIV ISOLATION ALSO OCCURRED | | FOLLOWING THE TRIP DUE TO LOW TAVE. ALL RODS INSERTED PROPERLY AND ALL | | OTHER SYSTEMS FUNCTIONED AS REQUIRED FOLLOWING THE TRIP. | | | | DURING RECOVERY FROM THE TRIP, THE LICENSEE EXPERIENCED SOME PROBLEMS IN | | RESETTING THE AFW SYSTEM. THE LICENSEE REPORTED THAT THE RESET BUTTON WAS | | DEPRESSED THREE TIMES BEFORE THE PROPER STANDBY INDICATION WAS OBSERVED IN | | THE CONTROL ROOM. ADDITIONALLY, LETDOWN FLOW VARIABLE ORIFICE CONTROL | | VALVE 2NV849 FAILED TO OPEN UPON RESTORATION OF LETDOWN FLOW FROM THE RCS. | | | | THE LICENSEE IS INVESTIGATING THE CAUSE OF THE INITIAL MSIV CLOSURE, BUT | | SUSPECTS A GROUND IN A DC ELECTRICAL BUS. CONCURRENT WITH THE CLOSURE OF | | THE C MSIV, THE PLANT COMPUTER REGISTERED A NUMBER OF ELECTRICAL GROUNDS. | | THE LICENSEE SUSPECTS THAT A SOLENOID VALVE MAY HAVE DEVELOPED AN | | ELECTRICAL GROUND. THE LICENSEE PLANS TO RESTART THE UNIT FOLLOWING | | INVESTIGATION OF THE MSIV CLOSURE AND COMPLETION OF REPAIRS TO THE "B" | | COMPONENT COOLING WATER HEAT EXCHANGER (APPROXIMATELY 24-48 HOURS). THE RI | | HAS BEEN INFORMED. | | | | *** UPDATE DATE: 9/14/94 UPDATE TIME: 1617 *** FROM LICENSEE: TOWER BY | | STRANSKY *** THE LICENSEE REPORTED THAT THE GROUND ON DC BUS "EDD" WAS | | UNRELATED TO THE CLOSURE OF THE C MSIV. THE MSIV CLOSURE WAS CAUSED BY THE | | FAILURE OF AN AUXILIARY RELAY IN THE CONTROL CIRCUIT FOR THE VALVE. | | SPECIFICALLY, A SHORT CIRCUIT OCCURRED IN A NORMALLY ENERGIZED COIL IN ONE | | OF THE RELAYS. THE RELAY IS A CUTLER-HAMMER TYPE M RELAY. THE RI WAS | | INFORMED. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27783 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: FITZPATRICK REGION: 1 |NOTIFICATION DATE: 09/14/94 | |UNIT: [1] [ ] [ ] STATE: NY |NOTIFICATION TIME: 07:39 [ET]| |RX TYPE: [1] GE-4 |EVENT DATE: 09/14/94 | +------------------------------------------------+EVENT TIME: 07:14[EDT]| |NRC NOTIFIED BY: GREG DAVIS |LAST UPDATE DATE: 09/14/94 | |HQ OPS OFFICER: RUDY KARSCH +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |RICHARD CONTE RDO | |AESS 50.72(b)(1)(v) EMERGENCY SIREN INOP | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | N Y 75 POWER OPERATION | 75 POWER OPERATION | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | EMERGENCY SIRENS INOPERABLE. | | | | ALL EMERGENCY SIRENS ARE OUT OF SERVICE. OSWEGO COUNTY BELIEVES THAT THE | | COMPUTER ACTIVATION IS INOPERABLE, BUT THAT THE SIRENS CAN BE MANUALLY | | ACTIVATED. HOWEVER, THERE IS NO WAY TO TEST THE MANUAL BACK UP METHOD. THE | | LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. | | | | SEE EVENT # 27784 | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27784 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: NINE MILE POINT REGION: 1 |NOTIFICATION DATE: 09/14/94 | |UNIT: [1] [2] [ ] STATE: NY |NOTIFICATION TIME: 07:43 [ET]| |RX TYPE: [1] GE-2,[2] GE-5 |EVENT DATE: 09/14/94 | +------------------------------------------------+EVENT TIME: 06:11[EDT]| |NRC NOTIFIED BY: FRANK SIENCZAK |LAST UPDATE DATE: 09/14/94 | |HQ OPS OFFICER: RUDY KARSCH +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |RICHARD CONTE 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 +------------------------------------------------------------------------------+ | ALL EMERGENCY SIRENS REPORTED INOPERABLE. | | | | AT 0714 EDT THE LICENSEE WAS NOTIFIED THAT ALL 37 EMERGENCY SIRENS WERE OUT | | OF SERVICE AS OF 0611 EDT. PER THE LICENSEE'S EMERGENCY PLAN, GREATER THAN | | 19 SIRENS ARE OUT FOR MORE THAN ONE HOUR CONSTITUTES A LOSS OF THE | | EMERGENCY NOTIFICATION SYSTEM REQUIRING A ONE HOUR NOTIFICATION. THE | | SIRENS ARE STILL OUT OF SERVICE. THE CAUSE OF THE FAILURE IS NOT KNOWN AT | | THIS TIME. THE LICENSEE WILL INFORM THE NRC RESIDENT INSPECTOR. | | | | SEE EVENT # 27783. | | | | * * * UPDATE 09/14/94 0902EDT FROM:SAENCZAK * * * | | THE SIRENS WERE RETURNED TO SERVICE AFTER AN UNSPECIFIED COMPUTER | | CONTROLLER PROBLEM WAS CORRECTED. THE LICENSEE INFORMED THE NRC RESIDENT | | INSPECTOR. R1DO (CONTE) NOTIFIED. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27785 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: SEQUOYAH REGION: 2 |NOTIFICATION DATE: 09/14/94 | |UNIT: [ ] [2] [ ] STATE: TN |NOTIFICATION TIME: 13:08 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 09/14/94 | +------------------------------------------------+EVENT TIME: 11:50[EDT]| |NRC NOTIFIED BY: EAPES |LAST UPDATE DATE: 09/14/94 | |HQ OPS OFFICER: BOB STRANSKY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |LAWYER RDO | |APRE 50.72(b)(2)(vi) OFFSITE NOTIFICATION | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | | | | | 2 | N N 0 REFUELING | 0 REFUELING | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | LICENSEE NOTIFIED STATE OF TENNESSEE REGARDING DISCHARGE OF 4600 GALLONS OF | | WATER TO THE DISCHARGE POND VIA AN ALTERNATE PATHWAY. | | | | THE LICENSEE HAS SENT A LETTER TO THE STATE OF TN, DESCRIBING THE DISCHARGE | | OF 4600 GALLONS OF STEAM GENERATOR WATER TO THE PLANT DISCHARGE POND VIA AN | | ALTERNATE PATHWAY. THE WATER WAS CONSIDERED "ULTRA CLEAN", BUT CONTAINED | | SMALL QUANTITIES OF HYDRAZINE. THE LICENSEE STATED THAT THE CONCENTRATION | | OF HYDRAZINE IN THE DISCHARGE POND WAS LESS THAN 1 PART PER BILLION. THE | | RI HAS BEEN INFORMED. | +------------------------------------------------------------------------------+