U.S. Nuclear Regulatory Commission Operations Center Event Reports For 02/23/98 - 02/24/98 ** EVENT NUMBERS ** 33770 33771 33772 +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 33770 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: PALO VERDE REGION: 4 |NOTIFICATION DATE: 02/23/98 | |UNIT: [1] [ ] [ ] STATE: AZ |NOTIFICATION TIME: 03:59 [ET]| |RX TYPE: [1] CE,[2] CE,[3] CE |EVENT DATE: 02/22/98 | +------------------------------------------------+EVENT TIME: 22:21[MST]| |NRC NOTIFIED BY: DAN MARKS |LAST UPDATE DATE: 02/23/98 | |HQ OPS OFFICER: LEIGH TROCINE +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |JOSEPH TAPIA 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 | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | A/R Y 100 POWER OPERATION | 0 HOT STANDBY | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | AUTOMATIC REACTOR TRIP ON LOW STEAM GENERATOR WATER LEVEL DUE TO REDUCED | | FEEDWATER FLOW WHEN A STEAM GENERATOR ECONOMIZER FEEDWATER REGULATING VALVE | | DRIFTED CLOSED APPROXIMATELY 25% FROM ITS NORMAL POSITION | | | | AT APPROXIMATELY 2221 MST ON 02/22/98, AN AUTOMATIC REACTOR TRIP FROM 100% | | POWER OCCURRED ON LOW LEVEL IN THE #2 STEAM GENERATOR. APPROXIMATELY 2 | | SECONDS LATER, AN AUXILIARY FEEDWATER ACTUATION SIGNAL (AFAS-2) OCCURRED. | | THE CAUSE OF THE REACTOR TRIP AND THE AFAS-2 ACTUATION WAS REDUCED | | FEEDWATER FLOW WHEN THE #2 STEAM GENERATOR ECONOMIZER FEEDWATER REGULATING | | VALVE DRIFTED CLOSED APPROXIMATELY 25% (FROM ITS NORMAL POSITION) | | APPROXIMATELY 30 SECONDS PRIOR TO THE REACTOR TRIP. (THERE WERE NO | | APPLICABLE MAINTENANCE OR SURVEILLANCE ACTIVITIES ONGOING AT THE TIME OF | | THIS EVENT.) THE STEAM GENERATOR #2 ECONOMIZER FEEDWATER REGULATING VALVE | | HAS BEEN QUARANTINED UNTIL A TROUBLESHOOTING PLAN IS DEVELOPED. | | | | ALL CONTROL RODS FULLY INSERTED. BOTH DIESEL GENERATORS AUTOMATICALLY | | STARTED AS REQUIRED DURING THE AN AFAS-2 ACTUATION. THERE WAS NOTHING THAT | | WAS UNUSUAL OR NOT UNDERSTOOD, AND ALL SAFETY SYSTEMS FUNCTIONED AS | | REQUIRED. THERE WERE NO OTHER ENGINEERED SAFETY FEATURE ACTUATIONS, AND | | NONE WERE REQUIRED. LEVEL IN THE #2 STEAM GENERATOR WAS RESTORED BACK | | ABOVE THE AFAS-2 SETPOINT WITHIN APPROXIMATELY 1 MINUTE. THERE WERE NO BUS | | TRANSFER PROBLEMS, AND THE ELECTRICAL GRID WAS STABLE. NONE OF THE PRIMARY | | RELIEF VALVES OR SECONDARY SAFETY VALVES LIFTED. DUE TO THE AFAS-2 | | ACTUATION, THE TURBINE-DRIVEN AUXILIARY FEEDWATER PUMP STARTED. THIS PUMP | | EXHAUSTS TO THE ATMOSPHERE, BUT THERE IS NO SIGNIFICANT PRIMARY TO | | SECONDARY LEAKAGE OR SECONDARY SYSTEM ACTIVITY TO CAUSE ANY RADIOACTIVE | | RELEASE. | | | | THE LICENSEE STATED THAT THIS EVENT DID NOT RESULT IN ANY CHALLENGES TO THE | | FISSION PRODUCT BARRIER OR RESULT IN ANY RELEASES OF RADIOACTIVE MATERIALS. | | THE LICENSEE ALSO STATED THAT THIS EVENT DID NOT ADVERSELY EFFECT THE SAFE | | OPERATION OF THE PLANT OR THE HEALTH AND SAFETY OF THE PUBLIC. | | | | UNIT 1 IS CURRENTLY STABLE IN MODE 3 AT NORMAL OPERATING TEMPERATURE AND | | NORMAL OPERATING PRESSURE. THE REACTOR COOLANT PUMPS, PRESSURIZER HEATERS | | AND SPRAYS, AND NORMAL MAKEUP AND LETDOWN ARE BEING UTILIZED FOR PRIMARY | | SYSTEM TRANSPORT, PRESSURE, AND INVENTORY CONTROL. SECONDARY STEAM IS | | BEING DUMPED TO THE CONDENSER, AND THE NON-ESSENTIAL MOTOR-DRIVEN AUXILIARY | | FEEDWATER PUMP IS SUPPLYING WATER TO THE STEAM GENERATORS. THE DIESEL | | GENERATORS AND TURBINE-DRIVEN AUXILIARY FEEDWATER PUMP HAVE BEEN SECURED. | | | | THE LICENSEE STATED THAT THIS EVENT DESCRIPTION WAS BASED ON INFORMATION | | THAT IS CURRENTLY AVAILABLE. THE LICENSEE PLANS TO MAKE A FOLLOWUP | | NOTIFICATION VIA THE EMERGENCY NOTIFICATION SYSTEM OR UNDER THE REPORTING | | REQUIREMENTS OF 10 CFR 50.73 IF (THROUGH SUBSEQUENT REVIEWS OF THIS EVENT) | | ADDITIONAL INFORMATION IS IDENTIFIED THAT IS PERTINENT TO THIS EVENT OR | | ALTERS THE INFORMATION THAT WAS PROVIDED. | | | | THE LICENSEE NOTIFIED THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 33771 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: ZION REGION: 3 |NOTIFICATION DATE: 02/23/98 | |UNIT: [ ] [2] [ ] STATE: IL |NOTIFICATION TIME: 13:41 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 02/23/98 | +------------------------------------------------+EVENT TIME: 01:30[CST]| |NRC NOTIFIED BY: LANE OBEREMBT |LAST UPDATE DATE: 02/23/98 | |HQ OPS OFFICER: STEVE SANDIN +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |GEOFFREY WRIGHT RDO | |AESF 50.72(b)(2)(ii) ESF ACTUATION | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | | | | | 2 | N N 0 REFUELING | 0 REFUELING | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | INADVERTENT CONTAINMENT ISOLATION DUE TO MISCOMMUNICATION DURING | | MAINTENANCE ACTIVITIES | | | | THE FOLLOWING TEXT IS A PORTION OF A FACSIMILE RECEIVED FROM THE LICENSEE: | | | | "AT 0130 CST ON 02/23/98, THE UNIT 2 CONTAINMENT PURGE THAT WAS IN PROGRESS | | WAS SECURED DUE TO A RADIATION PROTECTION TECHNICIAN TURNING OFF THE | | RADIATION MONITOR BLOWER TO CHANGE PARTICULATE FILTERS IN THE CONTAINMENT | | PURGE RADIATION MONITOR. THIS RESPONSE WAS NOT EXPECTED BY THE CONTROL | | ROOM CREW. THE CREW DETERMINED THIS EVENT TO BE NON-REPORTABLE. HOWEVER, | | SUBSEQUENT REVIEW BY THE REGULATORY ASSURANCE GROUP IDENTIFIED THIS EVENT | | AS POTENTIALLY REPORTABLE. THE SHIFT MANAGER DETERMINED THIS EVENT WAS | | REPORTABLE, AND THIS 4-HOURS NON-EMERGENCY NOTIFICATION IS BEING | | COMPLETED." | | | | THE LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 33772 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: LIMERICK REGION: 1 |NOTIFICATION DATE: 02/23/98 | |UNIT: [1] [ ] [ ] STATE: PA |NOTIFICATION TIME: 17:23 [ET]| |RX TYPE: [1] GE-4,[2] GE-4 |EVENT DATE: 02/23/98 | +------------------------------------------------+EVENT TIME: 14:50[EST]| |NRC NOTIFIED BY: JOHN MERCURIO |LAST UPDATE DATE: 02/23/98 | |HQ OPS OFFICER: STEVE SANDIN +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |CLIFFORD ANDERSON 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 92 POWER OPERATION | 92 POWER OPERATION | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | OFFSITE NOTIFICATION TO STATE AND LOCAL AGENCIES CONCERNING AN INDUSTRIAL | | ACCIDENT ONSITE | | | | THE FOLLOWING TEXT IS A PORTION OF A FACSIMILE RECEIVED FROM THE LICENSEE: | | | | "AT 1450 HOURS ON MONDAY, FEBRUARY 23, 1998, AN INDIVIDUAL PERFORMING WORK | | IN THE VICINITY OF THE UNIT 1 TURBINE CRANE HAD HIS SAFETY HARNESS BECOME | | ENTANGLED IN A ROTATING PART OF THE CRANE. THIS CAUSED SEVERAL SERIOUS | | INJURIES TO THE WORKER. THE WORKER WAS REMOVED FROM THE CRANE AT 1550 | | HOURS AND PLACED IN A HELICOPTER FOR TRANSPORT TO THE HOSPITAL. THE WORKER | | WAS FRISKED CLEAN AT THE HOSPITAL. NO CONTAMINATION WAS FOUND ON THE | | WORKER OR IN THE HELICOPTER. [THIS] NOTIFICATION IS BEING MADE DUE TO THE | | SEVERITY OF THE ACCIDENT AND POTENTIAL FOR MEDIA SCRUTINY." | | | | THE LICENSEE INFORMED STATE AND LOCAL AGENCIES AND PLANS TO INFORM THE NRC | | RESIDENT INSPECTOR. IN ADDITION, THE LICENSEE IS PLANNING TO ISSUE A PRESS | | RELEASE. | +------------------------------------------------------------------------------+