05000338/FIN-2014004-01
From kanterella
Jump to navigation
Jump to search
Finding | |
|---|---|
| Title | Inadequate Procedure for Maintaining MCR/ESGR Air Handler |
| Description | A self-revealing NCV of 10 CFR 50 Appendix B, Criterion V, Instructions, Procedures, and Drawings, was identified for a failure to prescribe maintenance procedures affecting the quality of fan 1-HV-AC-7 appropriate to the circumstances. Specifically, the licensee failed to incorporate vendor guidance for taking bearing clearance measurements into maintenance procedure 0-MCM-0508-01 Repair Buffalo Forge Centrifugal Fans as required by administrative procedure VPAP-0502. This issue was entered in the licensees corrective action program (CAP) as condition report (CR) 552780. This finding was determined to be more than minor because it affects the reactor safety barrier integrity cornerstone attribute of control room barrier, and it adversely affected the cornerstone objective of ensuring the availability, reliability, and capability of systems that are required for the habitability of the control room. Specifically, the finding impacted the availability of 1-HV-AC-7, which affects the availability of the MCR/emergency switchgear room (ESGR) air conditioning system (ACS). The finding was determined to be associated with the barrier integrity cornerstone based on the NRC IMC 0609, Significance Determination Process (SDP), dated June 2, 2011, Attachment 4, Initial Characterization of Findings, dated June 19, 2012. The inspectors performed a Phase 1 analysis using the IMC 0609, Appendix A, The Significance Determination Process (SDP) for Findings At- Power , dated June 19, 2012 and determined that the finding was of very low significance (Green) because the finding did not represent a degradation of the barrier function of the control room against radiation protection, smoke or a toxic atmosphere. The redundant subsystem was able to provide cooling to the MCR/ESGR envelope and it was within the 30-day Technical Specification 3.7.11 LCO. The inspectors determined that this finding had a cross-cutting aspect in the area of human performance, design margins component, because the licensee failed to operate and maintain equipment within design margins where margins are carefully guarded and changed only through a systematic and rigorous process. Specifically, the licensee failed to recognize that the bearing clearance measurement identified in VTM 59-B878-00001 and the SKF Bearing Maintenance Handbook was a critical design parameter. |
| Site: | North Anna  |
|---|---|
| Report | IR 05000338/2014004 Section 1R12 |
| Date counted | Sep 30, 2014 (2014Q3) |
| Type: | NCV: Green |
| cornerstone | Barrier Integrity |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71111.12 |
| Inspectors (proximate) | G Kolcum M King P Cooper R Carrion R Hamilton R Kellner S Herrick W Pursley |
| Violation of: | 10 CFR 50 Appendix B Criterion V Technical Specification Technical Specification - Procedures |
| CCA | H.6, Design Margins |
| INPO aspect | WP.2 |
| ' | |
Finding - North Anna - IR 05000338/2014004 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Finding List (North Anna) @ 2014Q3
Self-Identified List (North Anna)
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||