U.S. Nuclear Regulatory Commission Operations Center Event Reports For 10/02/96 - 10/03/96 ** EVENT NUMBERS ** 31080 31081 31082 31083 !!!!!!!!! THIS EVENT HAS BEEN RETRACTED. THIS EVENT HAS BEEN RETRACTED !!!!!!! +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 31080 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: MILLSTONE REGION: 1 |NOTIFICATION DATE: 10/02/96 | |UNIT: [1] [2] [3] STATE: CT |NOTIFICATION TIME: 03:47 [ET]| |RX TYPE: [1] GE-3,[2] CE,[3] W-4-LP |EVENT DATE: 10/02/96 | +------------------------------------------------+EVENT TIME: 02:41[EDT]| |NRC NOTIFIED BY: C. SPODA |LAST UPDATE DATE: 10/02/96 | |HQ OPS OFFICER: BOB STRANSKY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |JAMES JOYNER RDO | |DTHR 73.71(c) SECURITY DEGRADATION | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | N N 0 REFUELING | 0 REFUELING | | 2 | N N 0 COLD SHUTDOWN | 0 COLD SHUTDOWN | | 3 | N N 0 COLD SHUTDOWN | 0 COLD SHUTDOWN | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | SAFEGUARDS SYSTEM DEGRADATION RELATED TO COMPUTER FUNCTIONS. IMMEDIATE | | COMPENSATORY ACTIONS WERE TAKEN UPON DISCOVERY. THE NRC RESIDENT INSPECTOR | | HAS BEEN INFORMED. (REFER TO THE HOO LOG FOR DETAILS.) | | | | * * * 1513 OCTOBER 2, 1996, UPDATE FROM ECKENRODE RECEIVED BY TROCINE * * * | | | | THE LICENSEE IS RETRACTING THIS EVENT NOTIFICATION BASED UPON FURTHER | | ANALYSIS WHICH INDICATED THAT THE INTRUSION DETECTION SYSTEM WAS WORKING | | CORRECTLY. (REFER TO THE HOO LOG FOR DETAILS.) COMPENSATORY MEASURES WERE | | TAKEN WITHIN EIGHT MINUTES OF THE EVENT, AND THE LICENSEE PLANS TO KEEP | | THEM IN PLACE UNTIL ALARM POINTS ARE TESTED TO ENSURE PROPER OPERATION. | | THIS TESTING IS CURRENTLY 75% COMPLETE, AND THE LICENSEE ANTICIPATES THAT | | ALL TESTING WILL BE COMPLETED BY 2359 TODAY. | | | | THE LICENSEE DISCUSSED THIS EVENT RETRACTION WITH NRC REGION 1 SAFEGUARDS | | INSPECTOR (GREG SMITH) AND THE NRC RESIDENT INSPECTOR (TED EASLICK). THE | | NRC OPERATIONS CENTER NOTIFIED THE R1DO (JOYNER). | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 31081 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: MILLSTONE REGION: 1 |NOTIFICATION DATE: 10/02/96 | |UNIT: [ ] [ ] [3] STATE: CT |NOTIFICATION TIME: 12:45 [ET]| |RX TYPE: [1] GE-3,[2] CE,[3] W-4-LP |EVENT DATE: 10/02/96 | +------------------------------------------------+EVENT TIME: 12:40[EDT]| |NRC NOTIFIED BY: RICHARD WALKER |LAST UPDATE DATE: 10/02/96 | |HQ OPS OFFICER: LEIGH TROCINE +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |JAMES JOYNER 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 | +-----+----------+-------+--------+-----------------+--------+-----------------+ | | | | | | | | | 3 | N N 0 COLD SHUTDOWN | 0 COLD SHUTDOWN | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | PROBABLE SPENT FUEL POOL PURIFICATION SYSTEM DESIGN ERROR COULD RESULT IN A | | LOSS OF SPENT FUEL POOL COOLING DURING A SEISMIC EVENT. | | | | THE LICENSEE IDENTIFIED A PROBABLE DESIGN ERROR ON THE SPENT FUEL POOL | | PURIFICATION SYSTEM. PARTS OF THIS NON-SEISMIC SYSTEM COULD POTENTIALLY | | BREAK OFF DURING A SEISMIC EVENT. IF THIS OCCURRED, THE WATER IN THE SPENT | | FUEL POOL WOULD DRAIN BELOW THE SUCTION FOR THE SPENT FUEL POOL COOLING | | PUMP, AND THIS WOULD CAUSE A LOSS OF SPENT FUEL POOL COOLING. | | | | THE UNIT IS NOT CURRENTLY IN ANY TECHNICAL SPECIFICATION LIMITING | | CONDITIONS FOR OPERATION AS A RESULT OF THIS ISSUE. CORRECTIVE ACTIONS | | HAVE NOT YET BEEN DETERMINED, AND DESIGN ENGINEERING PERSONNEL WILL BE | | INVESTIGATING THIS EVENT. | | | | THE LICENSEE NOTIFIED THE NRC RESIDENT INSPECTOR AND THE APPLICABLE STATE | | AND LOCAL AGENCIES. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 31082 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: VERMONT YANKEE REGION: 1 |NOTIFICATION DATE: 10/02/96 | |UNIT: [1] [ ] [ ] STATE: VT |NOTIFICATION TIME: 14:48 [ET]| |RX TYPE: [1] GE-4 |EVENT DATE: 10/02/96 | +------------------------------------------------+EVENT TIME: 14:15[EDT]| |NRC NOTIFIED BY: ANDREW WISNIEWSKI |LAST UPDATE DATE: 10/02/96 | |HQ OPS OFFICER: LEIGH TROCINE +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |JAMES JOYNER 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 REFUELING | 0 REFUELING | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | DISCOVERY OF A WIRING CONDITION WHICH RESULTED IN THE LACK OF CAPABILITY TO | | CLOSE THE CORE SPRAY MINIMUM FLOW VALVES | | | | DURING SEPTEMBER 1996, THE LICENSEE IDENTIFIED A PROBLEM WITH THE CORE | | SPRAY MINIMUM FLOW VALVES, AND AFTER FURTHER ENGINEERING EVALUATION, THE | | LICENSEE DETERMINED THAT THE CONDITION WAS OUTSIDE THE DESIGN BASIS AND | | SERIOUSLY DEGRADED THE CONTAINMENT BARRIER. THE LICENSEE DETERMINED THAT | | THE CORE SPRAY MINIMUM FLOW VALVES WERE WIRED SUCH THAT THEY WOULD REMAIN | | OPEN WITH NO CAPABILITY OF CLOSING IF THE CORE SPRAY PUMP WAS NOT RUNNING | | AND IF THERE WAS NO FLOW. THE ACCIDENT POSITION OF THESE VALVES IS | | DEPENDENT ON THE CONDITION OF THE PUMP, BUT THE CAPABILITY OF CLOSING THESE | | VALVES IS NECESSARY IN CASE OF A SYSTEM LEAK. | | | | THE MECHANICAL PROBLEM HAS ALREADY BEEN RESOLVED. DURING THIS REFUELING | | OUTAGE, THE LICENSEE CHANGED THE LOGIC ON THE VALVES AND PERFORMED REPAIR | | WORK SO THAT THE VALVES NOW HAVE THE CAPABILITY OF BEING CLOSED (FROM THE | | CONTROL ROOM) WITH THE PUMP OFF. THE LICENSEE ALSO PLANS TO TEST THESE | | VALVES. | | | | THE LICENSEE NOTIFIED THE NRC RESIDENT INSPECTOR AND PLANS TO NOTIFY THREE | | STATES. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 31083 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: DRESDEN REGION: 3 |NOTIFICATION DATE: 10/02/96 | |UNIT: [ ] [ ] [3] STATE: IL |NOTIFICATION TIME: 17:51 [ET]| |RX TYPE: [1] GE-1,[2] GE-3,[3] GE-3 |EVENT DATE: 10/02/96 | +------------------------------------------------+EVENT TIME: 13:44[CDT]| |NRC NOTIFIED BY: B. HANSON |LAST UPDATE DATE: 10/02/96 | |HQ OPS OFFICER: LEIGH TROCINE +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |JAMES CREED 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 | +-----+----------+-------+--------+-----------------+--------+-----------------+ | | | | | | | | | 3 | N Y 84 POWER OPERATION | 84 POWER OPERATION | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | INOPERABILITY OF THE HIGH PRESSURE COOLANT INJECTION (HPCI) SYSTEM DUE TO A | | HIGH AREA TEMPERATURE READING DURING THE PERFORMANCE OF SURVEILLANCE | | TESTING AND IDENTIFICATION OF A HPCI OIL SYSTEM PROBLEM | | | | DURING THE PERFORMANCE OF A HPCI SYSTEM OPERABILITY TEST, AN AREA | | TEMPERATURE ELEMENT EXCEEDED 120øF. THE PEAK TEMPERATURE WAS 122.6øF. | | THREE OTHER AREA TEMPERATURE ELEMENTS CONSISTENTLY READ APPROXIMATELY 95øF. | | THE SURVEILLANCE PROCEDURE REQUIRED THE HPCI SYSTEM TO BE DECLARED | | INOPERABLE IF ANY ONE OF THE FOUR TEMPERATURE ELEMENTS IN THE AREA EXCEEDED | | 120øF. THE VALIDITY OF THE TEMPERATURE ELEMENT READING IS BEING EVALUATED. | | IN ADDITION, THE HPCI OIL SYSTEM DID NOT PERFORM AS EXPECTED DURING | | SHUTDOWN OF THE HPCI TURBINE. THE LICENSEE IS ALSO EVALUATING THIS | | PROBLEM. | | | | A 7-DAY TECHNICAL SPECIFICATION LIMITING CONDITION FOR OPERATION WAS | | ENTERED AT 1315 CDT ON OCTOBER 2, 1996, WHEN THE HPCI SYSTEM WAS PURPOSELY | | REMOVED FROM SERVICE FOR THE PERFORMANCE OF THE SURVEILLANCE TEST. THE | | LICENSEE PLANS TO KEEP THE UNIT IN THIS LIMITING CONDITION FOR OPERATION | | UNTIL THESE ISSUES ARE RESOLVED. | | | | THE LICENSEE PLANS TO NOTIFY THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+