05000237/FIN-2008005-01
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Finding | |
|---|---|
| Title | LPCI Heat Exchangers\' Design Calculation Deficiencies and Discrepancies |
| Description | The inspectors identified a NCV of 10 CFR Part 50, Appendix B, Criterion III, Design Control, having very low safety significance involving the low pressure coolant injection (LPCI) heat exchangers cooling capability during a design basis loss of coolant accident (LOCA). Specifically, the licensee failed to evaluate the effects of higher containment pressure post power up-rate on the LPCI heat exchangers differential pressure set-point calculation. In response to the issue, the licensee implemented compensatory actions including updating various calculations and performing several operability evaluations. This finding was more than minor because there was reasonable doubt concerning the operability of the LPCI heat exchangers and if left uncorrected, these heat exchangers had the potential to be inoperable during the summer months. This finding was of very low safety significance because the inspectors determined that the LPCI heat exchangers were in a non-conforming but operable condition and the issue screened as Green using the SDP Phase 1 screening worksheet. (Section 1R07 |
| Site: | Dresden  |
|---|---|
| Report | IR 05000237/2008005 Section 1R07 |
| Date counted | Dec 31, 2008 (2008Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.07 |
| Inspectors (proximate) | T Bilik D Melendez-Colon W Slawinski C Phillips C Brown M Ring C Acosta Acevedoj Bozga J Draper R Murray E Sanchez-Santiago R Winter F Ramirez |
| INPO aspect | |
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Finding - Dresden - IR 05000237/2008005 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Dresden) @ 2008Q4
Self-Identified List (Dresden)
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