05000219/FIN-2010008-03
From kanterella
Jump to navigation
Jump to search
Finding | |
|---|---|
| Title | 1A2 and 1B2 480 V Load Center Transformer Cooling Fan Testing |
| Description | The team identified a finding of very low safety significance (Green) involving an NCVof 10 CFR 50, Appendix B, Criterion XI, Test Control, because Exelon had not established a test program for safety-related load center transformer cooling fans to confirm the capability of the fans to cool the load center at its rated output. Specifically, Exelon had not established periodic testing to verify the 1A2 and 1B2 transformer cooling fans were functional to support the design rating allowed for in operational procedures. This failed to meet the design requirement established in modification package SDD OC-732A, which required in part, that the cooling system fans shall be periodically tested for operability both in the manual and automatic modes. Exelon entered the issue into the corrective action program and tested the fans during the inspection to ensure the fanswere operational in the manual mode and would be in a ready to operate status if needed. The finding was determined to be more than minor because it was associated with the Mitigating Systems Cornerstone attribute of procedure quality and adversely affected the cornerstone objective of ensuring the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Specifically, the lack of testing impacts the objective because there is no method to determine the capability of the fans to support cooling of the transformers at their rated output. The team determined the finding could be evaluated using the SDP in accordance with IMC 0609, Significance Determination Process, Attachment 0609.04, Phase 1-lnitial Screening and Characterization of Findings. The finding was of very low safety significance because it was not a design or qualification deficiency, did not represent a loss of a system/train safety function, and did not screen as potentially risk significant due to external events. The team did not identify a cross-cutting aspect with this finding because this was an old design/test issue and therefore was not reflective of current performance. |
| Site: | Oyster Creek |
|---|---|
| Report | IR 05000219/2010008 Section 1R21 |
| Date counted | Sep 30, 2010 (2010Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.21 |
| Inspectors (proximate) | C Cahill J Schoppy F Arner S Kobylarz S Spiegelman L Doerflein P Mckenna A Dugandzic |
| INPO aspect | |
| ' | |
Finding - Oyster Creek - IR 05000219/2010008 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Finding List (Oyster Creek) @ 2010Q3
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||