05000456/FIN-2010005-01
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Finding | |
|---|---|
| Title | Degraded Fire Seal Between Two Fire Zones |
| Description | A finding of very low safety significance and an associated NCV of License Condition 2.E was identified by the inspectors when licensee personnel failed to maintain a fire seal between Unit 2 Fire Zone 11.6-2 on the 426 elevation and Unit 2 Fire Zone 11.5A-2 on the 414 elevation of the auxiliary building and adjacent to the containment structure in accordance with the approved Fire Protection Program. This issue was entered into the licenseefs corrective action program as IR 1126534. Corrective actions consisted of implementing a fire watch for this area until the seal was repaired. In addition, the licensee performed an extent of condition review and entered additional related deficiencies into the correction action program. The inspectors determined that the failure to identify and implement corrective actions for a degraded fire seal between two fire areas was contrary to the approved Fire Protection Plan and was a performance deficiency. The degraded fire seal was determined to be more than minor because it was associated with the Mitigating Systems cornerstone attribute of Protection Against External Factors (Fire) and affected the cornerstone objective of ensuring the availability, reliability and capability of systems that respond to initiating events to prevent undesirable consequences (i.e., core damage). Specifically, fire seals are designed to confine a fire within an area for a time to allow for mitigating actions. A degraded fire seal would not assure this confinement function would be met for the designed and expected duration. The inspectors determined that the finding was of very low safety significance (Green) in accordance with IMC 0609, Appendix F, gFire Protection Significance Determination Process.h The inspectors identified that this issue had a cross-cutting aspect in the Problem Identification and Resolution area because licensee personnel failed to identify and therefore assess this issue completely, accurately, and in a timely manner within the stationfs CAP (P.1(a)). (Section 1R05.1) |
| Site: | Braidwood  |
|---|---|
| Report | IR 05000456/2010005 Section 1R05 |
| Date counted | Dec 31, 2010 (2010Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.05 |
| Inspectors (proximate) | M Holmberg M Perry M Thorpe Kavanaugh N Feliz Adomo R Jicklin R Ng T Go B Metrow B Palagi D Betancourt D Jones E Duncan J Benjamin J Dalzell J Robbins |
| CCA | P.1, Identification |
| INPO aspect | PI.1 |
| ' | |
Finding - Braidwood - IR 05000456/2010005 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Braidwood) @ 2010Q4
Self-Identified List (Braidwood)
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