05000324/FIN-2009004-03
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Finding | |
|---|---|
| Title | Surveillance Test Performed on Incorrect Loop of RHR |
| Description | A self-revealing Green non-cited violation of TS 5.4.1, Procedures, was identified when the licensee failed to follow work order instructions contained in work order 1280322. This work order directed technicians to perform testing on the B loop of the Unit 1 residual heat removal (RHR) system according to procedure 1MST-RHR28R, RHR Time Delay Relay Channel Calibration. Contrary to these work order instructions, portions of the procedure affecting Loop A were performed instead of Loop B. After the technicians completed the A loop section of the procedure, they reported to the control room where operators recognized the error. Once the error was recognized, the maintenance was stopped and B loop of RHR was returned to operable. This finding was entered into the licensees corrective action program as NCR #344233. The finding was determined to be more than minor because the finding was associated with the Mitigating Systems Cornerstone attribute of configuration control and affected the cornerstone objective of to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Specifically, as a result of this error on the Loop A RHR relay channels, for a short time, safety interlocks were bypassed on both the low pressure injection coolant (LPCI) outboard injection valve and the RHR heat exchanger bypass valve, and the position of the RHR pump minimum flow bypass valve was changed out of its normal position. The inspectors determined the finding could be evaluated using the SDP in accordance with IMC 0609, Significance Determination Process, Attachment 0609.04, Phase 1 - Initial Screening and Characterization of findings, Table 4a for the Mitigating Systems Cornerstone. The finding was determined to be of very low safety significance (Green) because the finding was not a design or qualification deficiency which resulted in loss of operability or functionality, did not represent a loss of system safety function, did not represent an actual loss of safety function of a single train for greater than its TS allowed outage time, and did not represent potentially risk significant due to a seismic, flooding, or severe weather initiating event. The finding has a cross-cutting aspect in the Human Performance cross cutting area, Work Practices component, because the licensee failed to ensure surveillance instructions (work order 1280322) were implemented correctly. This resulted in performing a surveillance test on the A loop of the RHR system while the B loop of the RHR system was disabled (H.4(b)) |
| Site: | Brunswick  |
|---|---|
| Report | IR 05000324/2009004 Section 1R22 |
| Date counted | Sep 30, 2009 (2009Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71111.22 |
| Inspectors (proximate) | P Capehart G Kolcum S Rose J Polickoski J Reece C Welch R Musser R Clagg |
| CCA | H.8, Procedure Adherence |
| INPO aspect | WP.4 |
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Finding - Brunswick - IR 05000324/2009004 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Brunswick) @ 2009Q3
Self-Identified List (Brunswick)
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