U.S. Nuclear Regulatory Commission Operations Center Event Reports For 10/25/95 - 10/26/95 ** EVENT NUMBERS ** 29503 29504 29505 29506 29507 29508 29509 +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 29503 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: RIVER BEND REGION: 4 |NOTIFICATION DATE: 10/25/95 | |UNIT: [1] [ ] [ ] STATE: LA |NOTIFICATION TIME: 02:13 [ET]| |RX TYPE: [1] GE-6 |EVENT DATE: 10/24/95 | +------------------------------------------------+EVENT TIME: 23:17[CDT]| |NRC NOTIFIED BY: JIM BOYLE |LAST UPDATE DATE: 10/25/95 | |HQ OPS OFFICER: LEIGH TROCINE +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |LINDA HOWELL 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 +------------------------------------------------------------------------------+ | REACTOR CORE ISOLATION COOLING (RCIC) SYSTEM ISOLATION DUE TO A FAILED | | TEMPERATURE SWITCH | | | | THE LICENSEE REPLACED TEMPERATURE SWITCH E31K605F (A RILEY TRIP UNIT) FOR | | THE DIVISION 2 RCIC ISOLATION LOGIC WHILE THE RCIC SYSTEM WAS IN ITS | | STANDBY CONFIGURATION, AND THE NEW TEMPERATURE SWITCH FAILED FOLLOWING | | INSTALLATION. (THIS SWITCH IS PART OF THE LEAK DETECTION LOGIC, AND IT | | SENSES MAIN STEAM LINE DIFFERENTIAL TEMPERATURE.) THE FAILURE OF THE NEW | | SWITCH CAUSED AN ISOLATION OF THE RCIC SYSTEM IN THAT A CONTAINMENT | | ISOLATION VALVE (E51MOV63) IN THE RCIC STEAM SUPPLY LINE AND THE TRIP | | THROTTLE VALVE (E51MOVCOO2) BOTH CLOSED. ALL SYSTEMS FUNCTIONED AS | | REQUIRED. | | | | REPAIRS ARE CURRENTLY IN EFFECT TO REPLACE THE FAILED TEMPERATURE SWITCH. | | THE HIGH PRESSURE CORE SPRAY SYSTEM IS CURRENTLY AVAILABLE AND OPERABLE, | | AND ALL OF THE REMAINING EMERGENCY CORE COOLING SYSTEMS ARE IN THE STANDBY | | ALIGNMENT. THE LICENSEE HAS RESTORED THE RCIC SYSTEM TO ITS STANDBY | | CONFIGURATION, AND THE UNIT IS CURRENTLY IN A 24-HOUR LIMITING CONDITION | | FOR OPERATION. | | | | THE LICENSEE NOTIFIED THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 29504 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: PRAIRIE ISLAND REGION: 3 |NOTIFICATION DATE: 10/25/95 | |UNIT: [1] [2] [ ] STATE: MN |NOTIFICATION TIME: 06:05 [ET]| |RX TYPE: [1] W-2-LP,[2] W-2-LP |EVENT DATE: 10/25/95 | +------------------------------------------------+EVENT TIME: 02:50[CDT]| |NRC NOTIFIED BY: DAMMANN |LAST UPDATE DATE: 10/25/95 | |HQ OPS OFFICER: LEIGH TROCINE +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |GARY SHEAR RDO | |APRE 50.72(b)(2)(vi) OFFSITE NOTIFICATION | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |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 +------------------------------------------------------------------------------+ | NOTIFICATION OF OFFSITE AGENCIES OF A SMALL SPILL OF CHROMATED WATER | | | | DURING THE PERFORMANCE OF A HYDROSTATIC TEST OF THE D1 JACKET COOLING | | SYSTEM, AN EXPANSION TANK WAS NOT ISOLATED, AND THE TANK OVERFLOWED WHEN | | THE SYSTEM WAS PRESSURIZED. AS A RESULT, APPROXIMATELY 5 GALLONS OF | | CHROMATED WATER (562 PPM) SPILLED FROM THE D1 JACKET COOLING SYSTEM TO THE | | MISSISSIPPI RIVER VIA THE TURBINE BUILDING SUMP. THE SPILL HAS BEEN | | SECURED. | | | | THE LICENSEE NOTIFIED THE MINNESOTA STATE DUTY OFFICE DIVISION OF EMERGENCY | | MANAGEMENT, THE NATIONAL RESPONSE CENTER, AND THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 29505 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: BRAIDWOOD REGION: 3 |NOTIFICATION DATE: 10/25/95 | |UNIT: [1] [ ] [ ] STATE: IL |NOTIFICATION TIME: 13:09 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 10/25/95 | +------------------------------------------------+EVENT TIME: 09:00[CDT]| |NRC NOTIFIED BY: RANDY RAHRIG |LAST UPDATE DATE: 10/25/95 | |HQ OPS OFFICER: JOSEPH SEBROSKY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |GARY SHEAR 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 +------------------------------------------------------------------------------+ | THE LICENSEE DISCOVERED THAT 10 CFR PART 50, APPENDIX R, REQUIREMENTS WERE | | NOT MET IN A FIRE ZONE FOR UNIT 1. | | | | THE LICENSEE DISCOVERED THAT THE SEPARATION REQUIREMENTS OF APPENDIX R WERE | | NOT MET IN UNIT 1 FIRE ZONE 11.5-0, AUXILIARY BUILDING GENERAL AREA, | | ELEVATION 401 FEET. APPENDIX R REQUIRES THAT ONE TRAIN OF SAFE SHUTDOWN | | EQUIPMENT BE AVAILABLE AS A RESULT OF A SINGLE FIRE IN ANY FIRE ZONE IN THE | | PLANT. | | | | THE BYRON/BRAIDWOOD FIRE PROTECTION REPORT (FPR) SAFE SHUTDOWN ANALYSIS | | CONCLUDES THAT THE UNIT 1 TRAIN 'A' EMERGENCY DIESEL GENERATOR (EDG) IS | | AVAILABLE FOR A FIRE IN ZONE 11.5-0 (REFERENCE FPR 2.4.2.45). HOWEVER, THE | | 1A EDG MAY NOT BE AVAILABLE TO PROVIDE POWER TO THE REQUIRED SAFE SHUTDOWN | | LOADS BECAUSE ITS POTENTIAL TRANSFORMER (PT) AND CURRENT TRANSFORMER (CT) | | CABLES (1DG222 AND 1DG223) ARE LOCATED IN THIS ZONE UNPROTECTED. | | | | THIS SEPARATION VIOLATION RESULTED FROM A DESIGN DISCREPANCY IN THE FPR | | ANALYSIS, WHICH FAILED TO RECOGNIZE THAT THE PT AND CT CABLES ARE ESSENTIAL | | FOR THE EDG OPERATION. SINCE THE ANALYSIS FAILED TO CONSIDER THESE CABLES, | | THE ROUTING OF THE PT AND CT CABLES FOR ALL FOUR EDGS IS NOT CURRENTLY | | CONSIDERED IN THE ANALYSIS NOR IS THE IMPACT ON SAFE SHUTDOWN EVALUATED. | | | | A REVIEW OF THE ACTUAL CABLE LOCATIONS AND THEIR IMPACT ON SAFE SHUTDOWN | | WAS PERFORMED. THIS REVIEW IDENTIFIED 2 ZONES (UNIT 1 ZONE 11.5-0 AND UNIT | | 2 ZONE 3.2-1) WITH APPARENT APPENDIX R SEPARATION VIOLATIONS. UNIT 1 FIRE | | ZONE 11.5-0 IS THE SUBJECT SEPARATION VIOLATION. UNIT 2 FIRE ZONE 3.2-1 IS | | NOT A SEPARATION VIOLATION BECAUSE THE CABLES ARE CURRENTLY ROUTED IN A | | FIRE WRAPPED RACEWAY WITHIN THE ZONE; HOWEVER, THE FPR DOES NOT | | SPECIFICALLY IDENTIFY THIS. | | | | THE DISCREPANCY WAS IDENTIFIED DURING THE REVIEW OF THE OPEN BYRON AND | | BRAIDWOOD FPR ISSUES DISCOVERED DURING THE THERMO-LAG RESOLUTION PROJECT. | | THE LICENSEE DID NOT KNOW IF THE BYRON STATION HAS THE SAME PROBLEM, BUT | | ENGINEERS AT THE BYRON SITE ARE AWARE OF THIS ISSUE AT THE BRAIDWOOD SITE. | | | | FIRE WATCHES IN FIRE ZONE 11.5-0 ARE CURRENTLY IN PLACE AND HAVE BEEN IN | | PLACE FOR AN UNRELATED FIRE PROTECTION ISSUE. FOR LONG-TERM CORRECTIVE | | ACTIONS, THE LICENSEE PLANS TO RE-ROUTE CABLES 1DG222 AND 1DG223 OUT OF THE | | FIRE ZONE 11.5-0. | | | | THE LICENSEE HAS INFORMED THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 29506 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: LASALLE REGION: 3 |NOTIFICATION DATE: 10/25/95 | |UNIT: [1] [2] [ ] STATE: IL |NOTIFICATION TIME: 16:03 [ET]| |RX TYPE: [1] GE-5,[2] GE-5 |EVENT DATE: 10/25/95 | +------------------------------------------------+EVENT TIME: 14:07[CDT]| |NRC NOTIFIED BY: JIM SPIELER |LAST UPDATE DATE: 10/25/95 | |HQ OPS OFFICER: JOSEPH SEBROSKY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |GARY SHEAR RDO | |DTHR 73.71(c) SECURITY DEGRADATION | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |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 +------------------------------------------------------------------------------+ | SECURITY DEGRADATION RELATED TO DETECTION. IMMEDIATE COMPENSATORY ACTIONS | | WERE TAKEN UPON DISCOVERY. SEE HOO LOG FOR DETAILS. | | | | THE LICENSEE HAS INFORMED THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 29507 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: WATERFORD REGION: 4 |NOTIFICATION DATE: 10/25/95 | |UNIT: [3] [ ] [ ] STATE: LA |NOTIFICATION TIME: 17:53 [ET]| |RX TYPE: [3] CE |EVENT DATE: 10/25/95 | +------------------------------------------------+EVENT TIME: 16:15[CDT]| |NRC NOTIFIED BY: DOUGLAS ORTEGO |LAST UPDATE DATE: 10/25/95 | |HQ OPS OFFICER: JOSEPH SEBROSKY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |LINDA HOWELL RDO | |DDDD 73.71 UNSPECIFIED PARAGRAPH | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |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 +------------------------------------------------------------------------------+ | THE LICENSEE DISCOVERED THAT A CONTRACT EMPLOYEE WHO HAD BEEN GRANTED | | UNESCORTED ACCESS HAD A PENDING FELONY CHARGE. THE UNESCORTED ACCESS FOR | | THE INDIVIDUAL WAS REVOKED. SEE HOO LOG FOR DETAILS. | | | | THE LICENSEE WILL INFORM THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 29508 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: SURRY REGION: 2 |NOTIFICATION DATE: 10/25/95 | |UNIT: [1] [2] [ ] STATE: VA |NOTIFICATION TIME: 18:47 [ET]| |RX TYPE: [1] W-3-LP,[2] W-3-LP |EVENT DATE: 10/25/95 | +------------------------------------------------+EVENT TIME: 17:00[EDT]| |NRC NOTIFIED BY: WILLIAM WEBSTER |LAST UPDATE DATE: 10/25/95 | |HQ OPS OFFICER: JOSEPH SEBROSKY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |EDWARD MCALPINE 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 82 POWER OPERATION | 82 POWER OPERATION | | 2 | N Y 100 POWER OPERATION | 100 POWER OPERATION | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | SAFETY PARAMETER DISPLAY SYSTEM (SPDS) HAS BEEN INOPERABLE FOR GREATER THAN | | ONE HOUR. | | | | AT 17:00, SPDS WAS NOTED TO BE INOPERABLE, AND ATTEMPTS TO RESTORE THE | | COMPUTER SYSTEM WERE UNSUCCESSFUL. AT 18:00, THE 1-HOUR CLOCK TO RESTORE | | THE SPDS EXPIRED REQUIRING THAT A REPORT BE MADE IN ACCORDANCE WITH 10 CFR | | 50.72. THE LICENSEE IS INVESTIGATING THE PROBLEM WITH THE SYSTEM. ALL | | ECCS SYSTEMS AND EDGS ARE OPERABLE FOR BOTH UNITS. | | | | THE LICENSEE WILL INFORM THE NRC RESIDENT INSPECTOR. | | | | * * * UPDATE AT 21:27 ON OCTOBER 25, 1995, FROM WEBSTER BY SEBROSKY * * * | | | | SPDS WAS RETURNED TO OPERABLE STATUS AT 19:38. THE LICENSEE IS CONTINUING | | TO PERFORM WORK ON THE SYSTEM BECAUSE ONE OF TWO MASTER RECEIVERS FOR THE | | SYSTEM REMAINS INOPERABLE. | | | | THE HOO NOTIFIED THE R2DO (MCALPINE). | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 29509 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: SOUTH TEXAS REGION: 4 |NOTIFICATION DATE: 10/26/95 | |UNIT: [1] [ ] [ ] STATE: TX |NOTIFICATION TIME: 01:30 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 10/25/95 | +------------------------------------------------+EVENT TIME: 21:27[CDT]| |NRC NOTIFIED BY: TIM BOWMAN |LAST UPDATE DATE: 10/26/95 | |HQ OPS OFFICER: LEIGH TROCINE +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: | | |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 +------------------------------------------------------------------------------+ | AUTOMATIC START OF A COMPONENT COOLING WATER (CCW) PUMP DUE TO AN APPARENT | | FAILURE OF AN ESSENTIAL COOLING WATER (ECW) PUMP DISCHARGE PRESSURE SWITCH | | | | AT 21:27 CDT, CCW PUMP 1B AUTOMATICALLY STARTED DUE TO AN APPARENT FAILURE | | OF THE ECW PUMP 1A DISCHARGE PRESSURE LOW SWITCH (PSL-6880A). CCW PUMP 1B | | IS DESIGNED TO AUTOMATICALLY START ON A LOW ECW DISCHARGE PRESSURE | | CONDITION ON ECW TRAINS 'A' AND 'C' WITH THE CCW/ECW MODE SELECTOR SWITCH | | IN THE 'STANDBY' POSITION. THE AUTOMATIC STARTING OF CCW PUMP 1B IS A | | NON-EMERGENCY AUTOMATIC ACTUATION OF AN ENGINEERED SAFEGUARDS FEATURE | | COMPONENT. | | | | PRIOR TO THE AUTOMATIC START OF CCW PUMP 1B, IT WAS IN THE STANDBY | | CONDITION, AND ALL THREE TRAINS OF ECW PUMPS WERE RUNNING. AT 21:25 CDT, | | THE CONTROL ROOM OPERATORS SECURED ECW PUMP 1C WITH THE TRAIN 'B' CCW/ECW | | MODE SELECTOR SWITCH IN THE 'OFF' POSITION. AT 21:27 CDT, THE CONTROL ROOM | | OPERATORS RETURNED THE TRAIN 'B' CCW/ECW MODE SELECTOR SWITCH TO THE | | 'STANDBY' POSITION; AND FOLLOWING A 15 SECOND TIME DELAY, CCW PUMP 1B | | AUTOMATICALLY STARTED DUE TO THE LOW DISCHARGE PRESSURE CONDITION ON ECW | | TRAIN 'C' AND DUE TO A FAILED DISCHARGE PRESSURE LOW SWITCH ON ECW TRAIN | | 'A'. CCW PUMP 1B FUNCTIONED AS DESIGNED THROUGHOUT THE EVENT. | | | | THE LICENSEE NOTIFIED THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+