05000352/FIN-2008009-01
From kanterella
Jump to navigation
Jump to search
Finding | |
|---|---|
| Title | Failure to Complete Bleeder Trip Valve Testing |
| Description | The inspectors identified a finding of very low safety significance for Exelons failure to complete the testing described in the Updated Final Safety Analysis Report (UFSAR) for one of the third stage feedwater heater bleeder trip valves. Exelon entered this issue into the corrective action program under issue reports (IRs) 772753, 812344, 817399, and 817443, and on August 28, 2008, started testing bleeder trip valve XV-002- 108B at the desired frequency stated in the UFSAR. The inspectors determined that this finding is greater than minor because it is associated with the equipment performance attribute of the Mitigating Systems cornerstone and has the potential to adversely affect the cornerstone objective of ensuring the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Not testing the bleeder trip valves in accordance with the statements in the LGS UFSAR adversely impacted the assumptions in LGSs turbine missile probability analysis thereby potentially increasing the probability for damage to safety-related plant equipment caused by the release of high-energy turbine components. The inspectors evaluated this finding using IMC 0609, Attachment 4, Initial Screening and Characterization of Findings, and determined the finding is of very low safety significance. The inspectors also determined that this issue has a problem identification and resolution cross-cutting aspect in the corrective action area because LGS did not thoroughly evaluate the potential impact of an identified problem on the operability of safety-related equipment. Specifically, Exelon did not evaluate the impact that deferred bleeder trip valve testing may have had on the probability that the operability of safety related equipment could have been impacted by turbine missiles. (P.1(c)) |
| Site: | Limerick  |
|---|---|
| Report | IR 05000352/2008009 Section 4OA2 |
| Date counted | Sep 30, 2008 (2008Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71152 |
| Inspectors (proximate) | R Moore C Bickett N Sieller |
| CCA | P.2, Evaluation |
| INPO aspect | PI.2 |
| ' | |
Finding - Limerick - IR 05000352/2008009 | ||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Finding List (Limerick) @ 2008Q3
Self-Identified List (Limerick)
| ||||||||||||||||||||||||||||||||||||||||||