05000482/FIN-2008004-05
From kanterella
Jump to navigation
Jump to search
Finding | |
|---|---|
| Title | Water hammer caused by loss of offsite power exceeds heat exchanger bolt yield strength |
| Description | A self-revealing noncited violation of 10 CFR Part 50, Appendix B, Criterion III, Design Control, occurred on April 7, 2008, when a loss of offsite power caused the service water pumps to shut down and the essential service water pump to start. As a result, a water hammer occurred and the control room air conditioning unit Condenser B developed an approximately 80 gpm essential service water leak due to inadequate yield strength of the studs. This issue was entered into the corrective action program as Condition Report 2008-001450. Wolf Creeks operation of the control room air conditioning and essential service water systems outside the design limits of the heat exchanger studs was determined to be a performance deficiency. The finding was determined to be more than minor because it impacted the mitigating systems cornerstone objective of ensuring the availability, reliability, and operability of systems that respond to initiating events. Using Manual Chapter 0609.04, Phase 1 - Initial Screening and Characterization of Findings, this finding was determined to be of very low safety significance because it did not cause the loss of safety function and did not impact risk for external events. The inspectors determined that the finding has a problem identification and resolution crosscutting aspect in the area associated with the corrective action program. Specifically, Wolf Creek previously identified that the heat exchanger joint might be inadequate, but failed to perform any subsequent corrective action P.1.d] (Section 4OA2). |
| Site: | Wolf Creek  |
|---|---|
| Report | IR 05000482/2008004 Section 4OA2 |
| Date counted | Sep 30, 2008 (2008Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71152 |
| Inspectors (proximate) | R Deese D Dumbacher S Cochrum C Long P Alter J Groom W Schaup R Hickok |
| CCA | P.3, Resolution |
| INPO aspect | PI.3 |
| ' | |
Finding - Wolf Creek - IR 05000482/2008004 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Finding List (Wolf Creek) @ 2008Q3
Self-Identified List (Wolf Creek)
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||