05000261/LER-2015-003
| H. B. Robinson Steam Electric Plant, Unit No. 2 | |
| Event date: | 01-19-2015 |
|---|---|
| Report date: | 0-5-2015 |
| Reporting criterion: | 10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications |
| 2612015003R00 - NRC Website | |
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H. B. Robinson Steam Electric Plant, Unit No. 2 05000 261
PLANT IDENTIFICATION
Westinghouse. Pressurized Water Reactor
BACKGROUND
At 0920 hours0.0106 days <br />0.256 hours <br />0.00152 weeks <br />3.5006e-4 months <br /> EST on 01/19/2015 with H. B. Robinson Steam Electric Plant, Unit No. 2 (HBRSEP2) in Mode 1 at 100 percent power, the plant entered Technical Specifications (TS) Surveillance Requirement (SR) 3.0.3 due to the determination that a previously conducted test (06/18/2014) of Station Battery Charger A-1 [BYC] was missed due to an out of tolerance (OOT) with the measurement and test equipment (M&TE). An immediate determination of operability was conducted and it was initially determined that the Station Battery Charger A-1 was operable. A subsequent review determined that entry into TS SR 3.0.3 was inappropriate because the M&TE OOT resulted in a failed surveillance, not a missed surveillance, thus the operability of Station Battery Charger A-1 could not be proven. On 04/16/2015, it was determined that the condition was reportable and CR 743653 was initiated.
The regulatory impact to the station as a consequence of this condition requires a 60-day licensee event report (LER) to the NRC under 10 CFR 50.73(a)(2)(i)(B), "Operation or Condition Prohibited by Technical Specifications.
Station Battery Charger A-1 is required to be operable per TS 3.8.4. TS 3.8.4 Condition A requires that, if a direct current (DC) electrical power subsystem [EJ] is inoperable, it be returned to operable status with a completion time of two (2) hours. The TS DC system at HBRSEP2 has two (2) battery charges per Station Battery. Only one (1) is kept in service at any time with the other in `standby mode. A review of Operator logs was conducted. Station Battery Charger A-1 had been utilized intermittently since 06/18/2014 to support plant operations.
EVENT DESCRIPTION
On 1/19/2015, with the plant operating in MODE 1 at 100% power and no structures, systems or components out of service at the time of this event that contributed to this event, a System Engineer was reviewing condition report (CR) 726206, which documented the measurement and test equipment (M&TE) out of tolerance (OOT) that was used in the 06/18/2014 performance of preventive maintenance (PM)-440, STATION BATTERY CHARGER A-1 CAPACITY TEST. On 01/19/2015 the System Engineer initiated CR 728030 to document that the M&TE OOT may have an impact on Station Battery Charger A-1 operability.
The Operations shift crew entered TS Surveillance Requirement (SR) 3.0.3 for a missed surveillance upon initiation of CR 728030 and removed the A-1 Battery Charger from service until it could be retested. CR 728030 included a Reportability Evaluation Worksheet (REW) to determine the reportability of the unsatisfactory completion of PM-440.
The REW (completed 02/17/2015) focused on the functionality/operability of the Station Battery Charger A-1 and determined that OOT of the M&TE did not impact the functionality/operability of the A-1 battery charger and there was no reportability requirement.
The PM had also been successfully re-performed on 01/22/2015 which supported the determination. This determination of reportability is consistent with the entering of TS SR 3.0.3 for a missed surveillance; however, it was later determined in the evaluation of CR 728666 (completed 02/24/2015) that TS SR 3.0.3 should not have been entered because the 06/14/2014 execution of PM-440 should have been considered a failed surveillance. This determination was not subsequently utilized to confirm the previous determination of the condition not being reportable.
EVENT DESCRIPTION (Continued) The review of Operator logs revealed that Station Battery Charger A-1 was in service on 08/06/2014 for approximately five (5) hours which exceeded the two (2) hours allowed by TS 3.8.4 Condition A, but was less than the required shutdown (six hours) in TS 3.8.4 Condition B. On 11/04/2014, Station Battery Charger A-1 was in service for approximately 16 hours1.851852e-4 days <br />0.00444 hours <br />2.645503e-5 weeks <br />6.088e-6 months <br />. Station Battery Charger A-1 was placed in service on 12/02/2014 and was not removed until the M&TE OOT was discovered on 01/19/2015.
These last two (2) periods of service exceeded the Condition A and Condition B Required Action times and is reportable to the NRC under 10 CFR 50.73(a)(2)(i)(B), "Operation or Condition Prohibited by Technical Specifications." On 04/14/2015, CR 743653 was initiated to capture the condition in the corrective action database.
CAUSAL FACTORS
The direct cause of the of the M&TE OOT was not determined by the calibration lab.
CORRECTIVE ACTIONS
Corrective actions taken to restore compliance with regulations and examine the extent of this condition are listed below.
Immediate:
1. Station Battery Charger A-1 was removed from service on 01/19/2015 and Station Battery Charger A was placed in service.
Completed:
1. Station Battery Charger A-1 was satisfactorily tested on 01/22/2015.
Planned:
None
SAFETY ANALYSIS
The successful test of Station Battery Charger A-1 on 01/22/2015 confirmed that it was capable of providing the capacity to charge Station Battery A. Station Battery Chargers A, B and B-1[BYC] were unaffected by the M&TE OOT.
ADDITIONAL INFORMATION
A search for previous similar events at HBRSEP2, was conducted; no similar events were revealed.
Energy Industry Identification System (EIIS) codes for systems and components relevant to this event are identified in the text of this document within brackets [ ].