05000254/FIN-2011004-04
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Finding | |
|---|---|
| Title | Failure to Appropriately Inspect Safety-Related Room Cooler |
| Description | A self-revealed finding of very low safety significance with an associated NCV of 10 CFR 50, Appendix B, Criterion V, Instructions, Procedures, and Drawings, was identified when a service water leak occurred on the Unit 1 emergency diesel generator cooling water pump cubicle cooler on April 19, 2011. Inspectors determined that the licensees failure to identify wall thinning resulting from areas of excessive corrosion within the coolers safety-related service water piping during periodic heat exchanger inspections was not in compliance with the licensees program requirements and was a performance deficiency. The issue was entered into the CAP as IR 1204785. Immediate corrective actions included repair of the hole in the piping, completion of an engineering assessment of other areas of the piping that were identified as below the minimum wall thickness, and performing extent of condition walkdowns of similar coolers. Inspectors concluded that the performance deficiency was more than minor using the questions in IMC 0612, Appendix B, because the Mitigating Systems Cornerstone objective of ensuring availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences, and equipment operability were impacted by the resulting leakage. The inspectors performed a SDP phase 1 screening for the finding using IMC 0609, Table 4a, and answered all of the questions No. The finding screened as very low safety significance, or Green. Inspectors did not assign a cross-cutting aspect because the licensee had suspended use of the deficient inspection procedure in December 2010 and had not performed any inspections in the past three years. |
| Site: | Quad Cities  |
|---|---|
| Report | IR 05000254/2011004 Section 4OA3 |
| Date counted | Sep 30, 2011 (2011Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71153 |
| Inspectors (proximate) | M Munir A Dahbur M Mitchell M Phalen M Ring J Mcghee B Cushman R Edwards C Mathews L Rodriguez |
| INPO aspect | |
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Finding - Quad Cities - IR 05000254/2011004 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Quad Cities) @ 2011Q3
Self-Identified List (Quad Cities)
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