05000456/FIN-2008005-01
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Finding | |
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| Title | Inadequate Control of High Pressure Gas Cylinders |
| Description | A finding of very low safety significance and an associated NCV of 10 CFR Part 50, Appendix B, Criterion III, Design Control, was identified by the inspectors for the failure to properly control high pressure gas cylinders in proximity to safety-related equipment. Specifically, the inspectors identified four high pressure gas cylinders in two separate locations that were restrained by a single chain less than half the height of the bottles and were in the vicinity of safety-related motor control centers. The licensee entered this issue into their corrective action program (CAP) and made the restraint of the gas cylinders seismically qualified. The inspectors determined that the failure to properly evaluate the installation and storage of high pressure gas cylinders in plant area AB-401 and AB-426 was contrary to the design basis and was a performance deficiency. The finding was more than minor because the finding was similar to IMC 0612, Appendix E, Example 4a, in that no engineering evaluation was performed to assess the seismic impact on the gas cylinders on multiple locations, where safety-related equipments were potentially affected. Therefore, this performance deficiency also impacted the Mitigating Systems Cornerstone objective of ensuring the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. The inspectors performed a Phase 1 SDP screening and the finding was determined to be potentially risk-significant due to external initiating event core damage sequences. The regional senior reactor analyst (SRA) determined that the Phase 2 SDP pre-solved tables and worksheets did not clearly address the inspection finding. Therefore, the SRA performed a SDP Phase 3 analysis and determined the issue was of very low safety significance. The inspector concluded this issue did not have a cross-cutting aspect because this finding was not indicative of current performance. The licensee originally installed the gas cylinder bottles greater than 2 years ago and they recognized the error when it was bring to their attention |
| Site: | Braidwood  |
|---|---|
| Report | IR 05000456/2008005 Section 1R04 |
| Date counted | Dec 31, 2008 (2008Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.04 |
| Inspectors (proximate) | A Garmoe B Dickson B Palagi D Mcneil G O'Dwyer M Holmberg M Perry R Skokowski R Winter |
| INPO aspect | |
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Finding - Braidwood - IR 05000456/2008005 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Braidwood) @ 2008Q4
Self-Identified List (Braidwood)
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