U.S. Nuclear Regulatory Commission Operations Center Event Reports For 12/14/94 - 12/15/94 ** EVENT NUMBERS ** 28144 28145 28146 28147 28148 +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28144 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: DIABLO CANYON REGION: 4 |NOTIFICATION DATE: 12/14/94 | |UNIT: [1] [2] [ ] STATE: CA |NOTIFICATION TIME: 04:31 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 12/14/94 | +------------------------------------------------+EVENT TIME: 00:26[PST]| |NRC NOTIFIED BY: MAGRUDER |LAST UPDATE DATE: 12/14/94 | |HQ OPS OFFICER: BOB STRANSKY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |JOHNSON RDO | |ARPS 50.72(b)(2)(ii) RPS 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 | | 2 | A/R Y 100 POWER OPERATION | 0 HOT STANDBY | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | DUAL UNIT TRIP FROM 100% POWER DUE TO DISTURBANCE ON 500kV TRANSMISSION | | GRID | | | | BOTH UNITS TRIPPED FROM 100% POWER DUE TO A MAJOR DISTURBANCE ON THE 500kV | | TRANSMISSION SYSTEM. A MAJOR SEPARATION OF THE SYSTEM CAUSED A MOMENTARY | | VOLTAGE DROP ON THE 500kV LINE TO THE PLANT, WHICH IN TURN CAUSED AUTOMATIC | | REACTOR TRIPS DUE TO UNDERVOLTAGE ON THE 12kV REACTOR COOLANT PUMP (RCP) | | BUSES. ALL RCPs CONTINUED TO OPERATE DESPITE THE MOMENTARY UNDERVOLTAGE, | | AND BOTH UNITS' 500kV OUTPUT BREAKERS REMAINED CLOSED THROUGHOUT THE | | DISTURBANCE. ALL RODS FULLY INSERTED FOLLOWING THE TRIP, AND ALL SYSTEMS | | FUNCTIONED AS DESIGNED. | | | | THE LICENSEE IS CURRENTLY INVESTIGATING THE CAUSE OF THE GRID DISTURBANCE. | | THE NRC RESIDENT INSPECTOR WILL BE INFORMED BY THE LICENSEE. | | | | *** UPDATE 0603 12/14/94 FROM MAGRUDER TO STRANSKY *** | | | | IN ADDITION TO THE REACTOR TRIPS, THE MOMENTARY UNDERVOLTAGE CAUSED THE | | UNIT 1 #11 EMERGENCY DIESEL GENERATOR AND THE UNIT 2 #22 EDG TO AUTOSTART, | | BUT NEITHER EDG LOADED TO ITS EMERGENCY BUS. RI WILL BE INFORMED. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28145 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: LASALLE REGION: 3 |NOTIFICATION DATE: 12/14/94 | |UNIT: [ ] [2] [ ] STATE: IL |NOTIFICATION TIME: 12:55 [ET]| |RX TYPE: [1] GE-5,[2] GE-5 |EVENT DATE: 12/14/94 | +------------------------------------------------+EVENT TIME: 10:15[CST]| |NRC NOTIFIED BY: TERMINI |LAST UPDATE DATE: 12/14/94 | |HQ OPS OFFICER: JOHN MacKINNON +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |B J HOLT RDO | |AESF 50.72(b)(2)(ii) ESF ACTUATION |AL CHAFFEE EO | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | | | | | 2 | N Y 100 POWER OPERATION | 100 POWER OPERATION | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | RCIC INJECTED INTO THE REACTOR VESSEL FOR ABOUT FIVE SECONDS DURING | | PERFORMANCE OF A SURVEILLANCE TEST PROCEDURE BEFORE IT WAS SECURED. | | | | DURING SCHEDULED PERFORMANCE OF ROUTINE TECH SPEC REQUIRED SURVEILLANCE | | TEST LIS-NB-418B, UNIT 2 REACTOR VESSEL LOW PRESSURE AND INJECTION LINE LOW | | PRESSURE, RHR "B"/RHR "C" (LPCI) INJECTION VALVE OPEN PERMISSIVE MONTHLY | | FUNCTIONAL TEST, UNIT 2 RECEIVED A SPURIOUS DIVISION 2 ECCS AND RCIC LOW | | LEVEL INITIATION SIGNAL. THIS CAUSED A START OF RHR PUMPS "B" AND "C" AND A | | START AND INJECTION OF RCIC. THE CONTROL ROOM OPERATOR VERIFIED THAT THE | | SIGNAL WAS SPURIOUS AND SECURED RCIC AND RHR PUMPS "B" AND "C". RCIC | | INJECTED INTO THE REACTOR VESSEL FOR APPROXIMATELY 5 SECONDS BEFORE IT WAS | | SECURED (RCIC INJECTION TO THE REACTOR VESSEL DID NOT CAUSE ANY WATER LEVEL | | CHANGES OR ANY INCREASE IN REACTOR POWER) RHR PUMPS "B" AND "C" DID NOT | | INJECT INTO THE REACTOR VESSEL BECAUSE REACTOR VESSEL PRESSURE WAS GREATER | | THAN DISCHARGE PRESSURE OF THE RHR PUMPS. THE DIVISION 2 EDG WAS | | OUT-OF-SERVICE FOR PLANNED MAINTENANCE AND THEREFORE DID NOT START. THE | | CAUSE OF THIS EVENT IS UNDER INVESTIGATION AND IT IS BELIEVED THE EVENT WAS | | CAUSED BY A LEAKING INSTRUMENT STOP VALVE. RCIC AND RHR PUMPS "B" AND "C" | | WERE INOPERABLE FOR LESS THAN TWO MINUTES. THEY WHERE RESTORED TO STANDBY | | ONCE THE INSTRUMENT WAS RESTORED TO ITS NORMAL LINEUP. ALL EQUIPMENT WAS | | RESTORED TO AN OPERABLE STATUS AND THE SURVEILLANCE TEST PROCEDURE WAS | | SUSPENDED PENDING REVIEW BY STATION MANAGEMENT. | | | | RESIDENT INSPECTOR AND THE STATE RESIDENT INSPECTOR WERE INFORMED OF THIS | | EVENT BY THE LICENSEE. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28146 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: DRESDEN REGION: 3 |NOTIFICATION DATE: 12/14/94 | |UNIT: [ ] [ ] [3] STATE: IL |NOTIFICATION TIME: 13:08 [ET]| |RX TYPE: [1] GE-1,[2] GE-3,[3] GE-3 |EVENT DATE: 12/14/94 | +------------------------------------------------+EVENT TIME: 11:30[CST]| |NRC NOTIFIED BY: VERCELLI |LAST UPDATE DATE: 12/14/94 | |HQ OPS OFFICER: WILLIAM HUFFMAN +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |B J HOLT 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 Y 98 POWER OPERATION | 98 POWER OPERATION | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | INADEQUATELY SUPPORTED CONTROL ROD DRIVE PIPING. | | | | THE FOLLOWING INFORMATION WAS PROVIDED BY THE LICENSEE VIA FACSIMILE: | | | | "DURING ENGINEERING WALKDOWN OF CONTROL ROD DRIVE (CRD) ACCUMULATOR BANKS, | | TWO LINES WERE NOTED TO APPEAR NOT TO BE ADEQUATELY SUPPORTED. THE LINES | | ARE ATTACHED TO THE INSERT AND WITHDRAW LINES FOR CRD M8. ENGINEERING | | BELIEVES THAT THESE UNSUPPORTED PIPES ARE OUTSIDE DESIGN BASIS. ENGINEERING | | IS CURRENTLY ANALYZING THE PIPING TO DETERMINE OPERABILITY OF THIS PIPING." | | | | THE NRC RESIDENT INSPECTOR HAS BEEN INFORMED. | | | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28147 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: WATTS BAR REGION: 2 |NOTIFICATION DATE: 12/14/94 | |UNIT: [1] [2] [ ] STATE: TN |NOTIFICATION TIME: 13:10 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 12/13/94 | +------------------------------------------------+EVENT TIME: 15:08[EST]| |NRC NOTIFIED BY: PAM HAMILTON |LAST UPDATE DATE: 12/14/94 | |HQ OPS OFFICER: JOHN MacKINNON +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |BILL RANKIN RDO | |HFIT 26.73 FITNESS FOR DUTY | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | N N 0 UNDER CONSTRUCT | 0 UNDER CONSTRUCT | | 2 | N N 0 | 0 | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | CONTRACT SUPERVISOR TESTED POSITIVE FOR MARIJUANA | | | | CONTRACT SUPERVISOR (MECHANICAL ENGINEER) TESTED POSITIVE FOR MARIJUANA ON | | 12/13/94. CONTRACTOR WAS REMOVED FROM TVA PROPERTY AND HIS ACCESS WAS | | RESTRICTED FOR THREE YEARS. CONTRACT SUPERVISOR HAD JUST BEEN HIRED AND WAS | | IN THE CHECK IN PHASE AT THE PLANT (TAKING SITE ACCESS TRAINING COURSE, | | etc). ALSO HE DID NOT HAVE UNESCORTED ACCESS PRIVILEGES. | | | | RESIDENT INSPECTOR WILL BE INFORMED BY THE LICENSEE. | | | | | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 28148 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: WASHINGTON NUCLEAR REGION: 4 |NOTIFICATION DATE: 12/14/94 | |UNIT: [2] [ ] [ ] STATE: WA |NOTIFICATION TIME: 16:08 [ET]| |RX TYPE: [2] GE-5 |EVENT DATE: 12/09/94 | +------------------------------------------------+EVENT TIME: 15:52[PST]| |NRC NOTIFIED BY: R J POCHE |LAST UPDATE DATE: 12/14/94 | |HQ OPS OFFICER: JOHN MacKINNON +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |BILL JOHNSON RDO | |DDDD 73.71 UNSPECIFIED PARAGRAPH | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 2 | N Y 100 POWER OPERATION | 100 POWER OPERATION | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | WEAPON IN VITAL AREA LEFT UNATTENDED FOR ABOUT 5 MINUTES. | | | | ON 12/09/94 A SECURITY WEAPON WAS LEFT UNATTENDED INSIDE A VITAL AREA WHEN | | A SECURITY OFFICER INADVERTENTLY LEFT THE WEAPON AFTER REMOVING HIS COAT. | | THE WEAPON WAS FOUND BY AN EQUIPMENT OPERATOR APPROXIMATELY FIVE MINUTES | | LATER. THE EVENT WAS REVIEWED FOR REPORTABILITY AT THAT TIME, SINCE THE | | LOCATION OF THE WEAPON WAS VERIFIABLE FOR THE FIVE MINUTE PERIOD AND NOT | | LOST, AND SINCE ACCESS TO THE VITAL AREA IN QUESTION WAS REVIEWED AND THE | | PERSONNEL IN THE AREA DURING THE TIME PERIOD THAT THE WEAPON WAS UNATTENDED | | WERE AUTHORIZED FOR ACCESS, IT WAS DETERMINED TO BE NON-REPORTABLE BUT | | LOGGABLE. THE EVENT WAS LOGGED ON 12/09/94. | | AN ATTEMPT WAS MADE TO CONTACT THE REGION SECURITY STAFF AND THE SITE | | SENIOR RESIDENT TO NOTIFY THEM OF THE EVENT, BUT BECAUSE IT WAS NOT REGULAR | | BUSINESS HOURS THEY WERE NOT READILY AVAILABLE ON 12/09/94 (FRIDAY). THE | | SENIOR RESIDENT INSPECTOR WAS NOTIFIED ON 12/10/94, AND THE REGION WAS | | NOTIFIED ON 12/12/94 (MONDAY). | | WNP-2 CONTACTED SEVERAL OTHER PLANTS THAT HAVE HAD SIMILAR EVENTS. THOSE | | PLANTS CONTACTED HAD NOT REPORTED THOSE EVENTS. HOWEVER, BASED ON | | DISCUSSIONS WITH REGIONAL PERSONNEL, AND BASED ON THEIR DISCUSSIONS WITH | | NRR, IT HAS BEEN DETERMINED THAT THE NRCs EXPECTATION IS THAT THIS TYPE OF | | EVENT BE REPORTED. THIS ADDITIONAL GUIDANCE IS THE BASIS FOR THIS REPORT. | | | | FOR ADDITIONAL DETAILS REFER TO HEADQUARTERS OPERATIONS OFFICERS LOG BOOK. | +------------------------------------------------------------------------------+