Event Notification Report for January 12, 2001
U.S. Nuclear Regulatory Commission Operations Center Event Reports For 01/11/2001 - 01/12/2001 ** EVENT NUMBERS ** 37613 37627 37659 !!!!!!!!! THIS EVENT HAS BEEN RETRACTED. THIS EVENT HAS BEEN RETRACTED !!!!!!! +------------------------------------------------------------------------------+ |Power Reactor |Event Number: 37613 | +------------------------------------------------------------------------------+ +------------------------------------------------------------------------------+ | FACILITY: SALEM REGION: 1 |NOTIFICATION DATE: 12/18/2000| | UNIT: [1] [] [] STATE: NJ |NOTIFICATION TIME: 09:52[EST]| | RXTYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 12/18/2000| +------------------------------------------------+EVENT TIME: 06:40[EST]| | NRC NOTIFIED BY: RUSS GUMBERT |LAST UPDATE DATE: 01/11/2001| | HQ OPS OFFICER: BOB STRANSKY +-----------------------------+ +------------------------------------------------+PERSON ORGANIZATION | |EMERGENCY CLASS: N/A |JOHN WHITE R1 | |10 CFR SECTION: | | |AINC 50.72(b)(2)(iii)(C) POT UNCNTRL RAD REL | | | | | | | | | | | +-----+----------+-------+--------+-----------------+--------+-----------------+ |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 +------------------------------------------------------------------------------+ | CONTAINMENT FAN COOLER UNITS DECLARED INOPERABLE | | | | "At 0640 on 12/18/00, '11' service water accumulator was declared inoperable | | based on water level low out of specification for Technical Specifications. | | This condition was identified following calibration of the 'B' level device. | | The service water accumulators support containment integrity by ensuring the | | containment fan coils remain properly filled during a design basis accident. | | Tech Spec 3.6.1.1 and Tech Spec 3.6.2.3 were entered for containment | | integrity and '11' and '12' containment fan coil unit inoperability. Actions | | were taken within one hour to comply with containment integrity Tech Spec. | | The service water accumulator was filled to within specification at 0713 at | | which time Tech Spec 3.6.1.1 was exited. The '11' and '12' containment fan | | coil units were restored to operable at 0744 and Tech Spec 3.6.2.3 was | | exited. Actions are underway to calibrate the 'A' channel of level | | indication. All power plant parameters remained stable throughout the event | | and no other safety systems were affected." | | | | The NRC resident inspector will be informed of this notification by the | | licensee. | | | | * * * UPDATE 1312EST ON 1/11/01 FROM BENSON BINGGELI TO S. SANDIN * * * | | | | The licensee is retracting this report based on the following: | | | | "On December 18, 2000, a four-hour report was made for Salem Unit 1 in | | accordance with 10CFR50.72(B) (2) (iii) due to the water level for the 11 | | Service Water accumulator being out of specification low based on readings | | from the 'B' level device. The service water accumulators support | | containment integrity by ensuring the containment fan coils remain properly | | filled during a design basis accident. | | | | "There are two level devices, 'A' and 'B', associated with each SW | | accumulator. During the time that the 'B' level device indicated that the SW | | accumulator was out of specification, the 'A' level device continued to show | | that the accumulator level was within the required level specification. | | | | "Following the calibration of the 'B' level device which showed that level | | on the 'B' channel was reading low out | | of specification, M&TE equipment (differential pressure gauge) was connected | | to the 11 SW accumulator to provide an independent reading of the tank | | level. The M&TE equipment confirmed that the 11 SW accumulator level was | | within 0.5 inches of the level indicated by the 'A' level device. Based on | | this confirmation, the 'A' level device on the 11 SW accumulator is | | providing an accurate indication of level in the tank. | | | | "Since the 'A' level device readings were within the required Technical | | Specification level band for the 11 SW accumulator, the 11 SW accumulator | | was always operable and capable of performing its design basis function. | | Based on this information, the 4-hour report is being retracted." | | | | The licensee will inform the NRC resident inspector. Notified R1DO(Lew). | +------------------------------------------------------------------------------+ !!!!!!!!! THIS EVENT HAS BEEN RETRACTED. THIS EVENT HAS BEEN RETRACTED !!!!!!! +------------------------------------------------------------------------------+ |Power Reactor |Event Number: 37627 | +------------------------------------------------------------------------------+ +------------------------------------------------------------------------------+ | FACILITY: BRUNSWICK REGION: 2 |NOTIFICATION DATE: 12/20/2000| | UNIT: [] [2] [] STATE: NC |NOTIFICATION TIME: 22:58[EST]| | RXTYPE: [1] GE-4,[2] GE-4 |EVENT DATE: 12/20/2000| +------------------------------------------------+EVENT TIME: 20:08[EST]| | NRC NOTIFIED BY: REINSBURROW |LAST UPDATE DATE: 01/11/2001| | HQ OPS OFFICER: LEIGH TROCINE +-----------------------------+ +------------------------------------------------+PERSON ORGANIZATION | |EMERGENCY CLASS: N/A |MIKE ERNSTES R2 | |10 CFR SECTION: | | |AINB 50.72(b)(2)(iii)(B) POT RHR INOP | | |NLCO TECH SPEC LCO A/S | | | | | | | | +-----+----------+-------+--------+-----------------+--------+-----------------+ |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 +------------------------------------------------------------------------------+ | FAILURE OF A REACTOR CORE ISOLATION COOLING (RCIC) BYPASS TO CONDENSATE | | STORAGE TANK VALVE TO FULLY STROKE DURING STROKE TIME TESTING | | | | The following text is a portion of a facsimile received from the licensee: | | | | "EVENT: At 2008 on 12/20/00 during performance of OPT-10.1.8 (RCIC System | | Valve Operability Test), the 2-E51-F022 (RCIC bypass to condensate storage | | tank) failed to fully stroke during stroke timing of the valve. A valve | | thermal overload annunciator was received. This rendered the Brunswick Unit | | 2 RCIC system inoperable. RCIC was not in operation at the time of this | | failure." | | | | "INITIAL SAFETY SIGNIFICANCE EVALUATION: Minimal safety significance. | | Remaining ECCS systems are operable." | | | | "CORRECTIVE ACTION(S): Determine the cause of the 2-E51-F022 valve failure. | | Return the Unit 2 RCIC system to operable following repair of 2-E51-F022." | | | | The licensee stated that this event did not result in any radiological | | release or reactor coolant leaks. The licensee also stated that all systems | | functioned as required and that there was nothing unusual or misunderstood. | | This event placed the unit in a 14-day technical specification limiting | | condition for operation. | | | | The licensee notified the NRC resident inspector. | | | | * * * RETRACTION ON 01/11/01 AT 1059ET BY CHARLES ELBERFELD TAKEN BY | | MACKINNON* * * | | | | Upon further evaluation, it has been determined that the conditions | | resulting in the RCIC system being declared inoperable for Technical | | Specification LCO 3.5.3 did not result in a loss of the system's function to | | remove residual heat. The function of the RCIC system is to respond to | | transient events by providing makeup coolant to the reactor. The RCIC | | system is not an Engineered Safety Feature system, and no credit is taken in | | the Updated Final Safety Analysis Report (UFSAR) for RCIC system operation | | mitigating the consequences of a postulated accident. The RCIC system is | | designed to operate either automatically or manually following reactor | | pressure vessel (RPV) isolation accompanied by a loss of normal coolant flow | | from the reactor feedwater system to provide adequate core cooling and | | control of the RPV water level. Its operational purpose is to provide an | | alternate source of reactor coolant to the vessel and to provide sufficient | | cooling to remove residual heat following reactor shutdown and loss of | | feedwater flow without requiring depressurization of the reactor. Neither | | the 2-E51-F022 being de-energized in the open position, nor the questionable | | capability of the 2-E51-F029 resulted in the loss of the ability of the | | RCIC system to remove residual heat. | | | | In the case of the RCIC Bypass to Condensate Storage Tank valve 2-E51-F022, | | with the valve de-energized in the open position, injection flow into the | | RPV is not diverted to the Condensate Storage Tank, or into the High | | Pressure Coolant Injection system due to additional closed valves in the | | test flow path. Therefore, if the RCIC system had been called upon to | | perform its needed function to remove residual heat, the system would have | | performed as required. | | | | In the case of the RCIC Torus Suction valve 2-E51-F029, although the ability | | for the RCIC system sump suction to align to the Torus must be available to | | meet its Technical Specification LCO Operability requirements, the RCIC | | system has the capacity to meet its function to remove residual heat when | | aligned to the Condensate Storage Tank. Although the RCIC system is a single | | train injection system, it has redundant suction flow paths that are fully | | capable of meeting these injection requirements. Loss of one suction flow | | path does not prevent the RCIC system from performing its required function | | to remove residual heat. | | | | Subsequently, it has been determined that the malfunction of the RCIC system | | components did not adversely impact that system function to remove residual | | heat. Carolina Power and Light Company has determined that this event does | | not meet 10 CFR 50.72 or 10 CFR 50.73 reporting criteria and this | | notification is being retracted. | | NRC R2DO (Chuck Ogle) notified. | | | | The NRC Resident Inspector was notified of this retraction by the licensee. | +------------------------------------------------------------------------------+ +------------------------------------------------------------------------------+ |Power Reactor |Event Number: 37659 | +------------------------------------------------------------------------------+ +------------------------------------------------------------------------------+ | FACILITY: PILGRIM REGION: 1 |NOTIFICATION DATE: 01/11/2001| | UNIT: [1] [] [] STATE: MA |NOTIFICATION TIME: 17:37[EST]| | RXTYPE: [1] GE-3 |EVENT DATE: 01/11/2001| +------------------------------------------------+EVENT TIME: 17:15[EST]| | NRC NOTIFIED BY: ERIC OLSON |LAST UPDATE DATE: 01/11/2001| | HQ OPS OFFICER: STEVE SANDIN +-----------------------------+ +------------------------------------------------+PERSON ORGANIZATION | |EMERGENCY CLASS: |DAVID LEW R1 | |10 CFR SECTION: | | |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 | +-----+----------+-------+--------+-----------------+--------+-----------------+ |1 N Y 100 Power Operation |100 Power Operation | | | | | | | +------------------------------------------------------------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | DISCOVERY OF CONDITION INVOLVING INABILITY OF THE LOW PRESSURE COOLANT | | INJECTION (LPCI) SYSTEM TO PERFORM DESIGN FUNCTION BETWEEN APRIL 1999 AND | | JANUARY 2001 | | | | "On 1/2/01, discovered incorrect relays (27-B2X2 and 27-B2Z2) had been | | installed in Bus B6 (480 VAC swing bus) during RFO 12 (April, 1999). The | | bus transfer logic was declared inoperable at the time and entry was made | | into a 7-day cold shutdown LCO for LPCI. | | | | "Further analysis of the circuit has determined that the B6 Bus would have | | remained de-energized following a loss of offsite power if the 'A' side | | power supply became unavailable (i.e., 'A' Emergency Diesel failed or 'A' | | 125 VDC Battery failed). | | | | "This condition is outside the design in accordance with Pilgrim Station | | FSAR. | | | | "The relays were replaced with the correct design and the LPCI LCO cleared | | at approximately 0745 Sunday, January 7, 2001." | | | | The licensee will inform the NRC resident inspector. | +------------------------------------------------------------------------------+
Page Last Reviewed/Updated Thursday, March 25, 2021
Page Last Reviewed/Updated Thursday, March 25, 2021