05000455/FIN-2015001-01
From kanterella
Jump to navigation
Jump to search
Finding | |
|---|---|
| Title | Failure to Provide Work Instructions that Appropriately Address Foreign Material Exclusion from Safeguards Relays |
| Description | The inspectors identified a finding of very low safety significance and an associated NCV of 10 CFR Part 50, Appendix B, Criterion V, Instructions, Procedures, and Drawings, when licensee personnel failed to provide work instructions appropriate to the circumstances for a work activity affecting quality. In particular, the licensees work instructions for modifying Unit 2 safety-related relays failed to include guidance on foreign material exclusion issues identified previously during a similar Unit 1 modification. This resulted in foreign material preventing Unit 2 Safeguards Actuation Relay Train A from actuating during surveillance testing. The licensee subsequently replaced the affected relay prior to declaring the system operable, performed an extent of condition review on similar relays on both Units 1 and 2, and entered the issue into their Corrective Action Program (CAP) as Issue Report (IR) 2388711. The performance deficiency was more than minor because it was associated with the Procedure Quality attribute of the Mitigating Systems cornerstone and adversely affected the cornerstone objective of ensuring the reliability of systems that respond to initiating events to prevent undesirable consequences (i.e., core damage). The Senior Reactor Analysts (SRAs) performed a detailed risk analysis and concluded that the finding was of very low safety significance. The finding had a cross-cutting aspect in the Evaluation component of the Problem Identification and Resolution cross-cutting area because the licensee failed to thoroughly evaluate the foreign material identified on Unit 1 to ensure that the resolution addressed the extent of condition. |
| Site: | Byron  |
|---|---|
| Report | IR 05000455/2015001 Section 4OA2 |
| Date counted | Mar 31, 2015 (2015Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71152 |
| Inspectors (proximate) | C Thompson E Duncan J Draper J Mcghee |
| Violation of: | 10 CFR 50 Appendix B Criterion V |
| CCA | P.2, Evaluation |
| INPO aspect | PI.2 |
| ' | |
Finding - Byron - IR 05000455/2015001 | |||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Finding List (Byron) @ 2015Q1
Self-Identified List (Byron)
| |||||||||||||||||||||||||||||||||||||||||||||||||