05000334/FIN-2014002-01
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Finding | |
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| Title | Inadequate Post Maintenance Testing Procedures Resulted in TDAFW Pump Inoperability |
| Description | A self-revealing, Green NCV of 10 CFR 50, Appendix B, Criterion V, Instructions, Procedures, and Drawings, was identified because FENOC did not establish appropriate post maintenance test procedures for the Turbine Driven Auxiliary Feedwater (TDAFW) pump following trip/throttle valve maintenance that required the removal and reinstallation of the governor. Specifically, FENOC identified in their apparent cause evaluation that vendor technical information regarding the verification of stable governor operating temperature following governor compensating needle valve adjustment was not incorporated into surveillance and post maintenance testing procedures. Because of this omission FENOC did not identify an incorrect governor compensating needle valve adjustment during post maintenance testing on November 1, 2103 and declared the TDAFW pump operable when it was not able to perform its safety function. As a result, the TDAFW pump tripped on overspeed following a reactor trip on January 6, 2014. Following the event, FENOC entered the issue into the corrective action program (CR-2014-0177), performed an apparent cause evaluation, and took corrective actions to update TDAFW pump surveillance and maintenance procedures to ensure the establishment of a stable governor temperature during post maintenance testing runs. The inspectors determined the actions to be reasonable. The inspectors determined the performance deficiency is more than minor because it is associated with the equipment performance attribute of the Mitigating Systems cornerstone and adversely impacted the cornerstone objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Specifically, the inadequate post maintenance testing procedure resulted in the inoperability of the TDAFW pump. In accordance with IMC 0609.04, Initial Characterization of Findings, and Exhibit 1 of IMC 0609, Appendix A, The Significance Determination Process for Findings At-Power, the inspectors determined that a detailed risk evaluation was required because the finding represented an actual loss of function of a single train of auxiliary feedwater (AFW) for greater than its Technical Specification allowed outage time. The detailed risk evaluation determined that the finding was of very low safety significance (Green). This finding did not have a cross-cutting aspect because the most recent opportunity for FENOC to include the appropriate vendor information in the post maintenance testing procedure was in 2009 and is not indicative of current performance. |
| Site: | Beaver Valley |
|---|---|
| Report | IR 05000334/2014002 Section 1R19 |
| Date counted | Mar 31, 2014 (2014Q1) |
| Type: | NCV: Green |
| cornerstone | Miscellaneous |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71111.19 |
| Inspectors (proximate) | D Orr E Burket E Carfang J Nadel K Mangan N Floyd R Rolph S Pindale |
| Violation of: | 10 CFR 50 Appendix B Criterion V Technical Specification Technical Specification - Procedures |
| INPO aspect | |
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Finding - Beaver Valley - IR 05000334/2014002 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Beaver Valley) @ 2014Q1
Self-Identified List (Beaver Valley)
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