05000348/FIN-2011004-01
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Finding | |
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| Title | Failure to properly pre-plan maintenance activities while conducting tagout operations on the 2C charging pump |
| Description | A self-revealing NCV of Technical Specification (TS) 5.4.1a was identified for the licensees failure to implement procedures recommended in Regulatory Guide (RG) 1.33. Specifically, the licensee did not properly pre-plan maintenance tagout activities on the unit 2 charging system. As a result, the licensee inadvertently overpressurized the 2C high head safety injection (HHSI) pump suction piping, adversely affecting the availability of the safety-related pump. Upon discovery of this condition, the licensee immediately depressurized the pump suction piping and initiated condition report (CR) 343336. Failure to properly pre-plan maintenance activities is a performance deficiency. This performance deficiency is more than minor because it is associated with the human performance attribute of the mitigating systems (MS) cornerstone, and adversely affected the cornerstone objective to ensure system availability of components responding to initiating events preventing undesirable consequences. The human performance attribute of the MS cornerstone was determined to be adversely affected because: 1) the licensees tagout procedure relied on a check valve as part of the maintenance boundary; 2) the licensees tagout sequence isolated the pump suction valve prior to isolating the pump discharge valve; resulting in overpressurization of the 2C charging pump suction piping, which rendered the 2C charging pump inoperable from August 11, 2011, to September 9, 2011. The significance of this finding was screened using IMC 0609, Significance Determination Process (SDP), Phase 1 worksheets of Attachment 4. The finding screened as Green, because it did not represent an actual loss of safety function of a single train of emergency core cooling system (ECCS) for greater than its TS allowable outage time. The finding was assigned a cross cutting aspect in the resources component of the human performance area (H.2(c)). Specifically, complete, accurate and up-todate work packages could have prevented overpressurization of the pump. |
| Site: | Farley  |
|---|---|
| Report | IR 05000348/2011004 Section 1R12 |
| Date counted | Sep 30, 2011 (2011Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.12 |
| Inspectors (proximate) | E Crowe J Hickey J Sowa |
| CCA | H.7, Documentation |
| INPO aspect | WP.3 |
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Finding - Farley - IR 05000348/2011004 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Farley) @ 2011Q3
Self-Identified List (Farley)
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