05000456/FIN-2011003-02
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Finding | |
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| Title | Structural Steel Beam Missing Fire Proofing Materials |
| Description | The inspectors identified a finding of very low safety significance and an associated NCV of Braidwood Operating License Condition 2.E when licensee personnel failed to fireproof a structural steel beam to achieve a required 3-hour fire rating. Specifically, the lack of fireproofing on the structural steel beam degraded a 3-hour rated fire barrier between the auxiliary building laundry room and the Unit 1 lower cable spreading room. The licensee implemented compensatory measures that included hourly fire watches and entered this issue into the corrective action program as IR 1209808. The inspectors determined that the failure to fireproof the structural steel beam in the auxiliary building laundry room as specified in the Fire Protection Report was a performance deficiency. This issue was determined to be more than minor in accordance with IMC 0612, Appendix B, Issue Screening, because it was associated with the Protection Against External Events attribute of the Mitigating Systems Cornerstone 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). The inspectors determined the finding could be evaluated using the SDP in accordance with IMC 0609, Significance Determination Process, Appendix F, Fire Protection Significance Determination Process, because this finding was associated with or involved the impairment or degradation of a fire protection barrier. This finding was determined to be of very low safety significance (Green) because there were no fire ignition source scenarios that would have caused the structural steel beam to weaken and collapse the ceiling. The inspectors determined there was no cross-cutting aspect associated with this finding because it did not reflect current performance due to the age of the performance deficiency. |
| Site: | Braidwood  |
|---|---|
| Report | IR 05000456/2011003 Section 1R05 |
| Date counted | Jun 30, 2011 (2011Q2) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.05 |
| Inspectors (proximate) | A Garmoe D Betancourt E Duncan J Benjamin J Gilliam J Robbins M Perry N Adorno N Feliz Adorno R Ng T Bilik T Go V Meghani |
| INPO aspect | |
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Finding - Braidwood - IR 05000456/2011003 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Braidwood) @ 2011Q2
Self-Identified List (Braidwood)
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