05000456/FIN-2009005-01
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Finding | |
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| Title | Water Found in Underground Cable Vaults |
| Description | The inspectors have identified an Unresolved Item (URI) related to underground cable vaults. Specifically, the inspectors reviewed an Issue Report(IR) generated by the licensee that documented the deteriorating condition of numerous underground cable vaults. The IR stated that water was found in all of the vaults that were opened and many cables were partially or fully submerged in water. During a review of the condition of cable vaults at Braidwood, the inspectors reviewed IR 968522, which documented the condition of cable vaults that were accessed as part of the installation of unrelated plant modifications. The inspectors also reviewed photographs of each cable vault that was accessed during the modification installation. None of the cables contained in the vaults were safety-related but many were associated with Maintenance Rule systems, such as Circulating Water, Non-Essential Service Water, and Auxiliary Power systems. The cable vaults that were accessed were 1E, 1Z, 2D, 2E, 2F, 2G, 2H, 2J, and X. The licensee reported that water was found in each cable vault and at least some cables were submerged in water in each cable vault. In addition to submerged cables, personnel also observed cracking of the concrete vault walls, rusting cable trays and supports, taped cable splices that were submerged in water, and sludge build-up on many cables and structures. All cable vaults on-site have not been inspected; however, the licensee believes the conditions observed in the vaults that were accessed exist inthe remaining vaults as well. The licensee has developed a modification to add the capability to remove water from the vaults but it has not yet been implemented. At the conclusion of the inspection period, the inspectors have notified NRC personnel from the Office of Nuclear Reactor Regulation, per IP 71111.06, and are awaiting further instruction. Pending additional information, this issue will remain open.(URI 05000456/2009005-01; 05000457/2009005-01 |
| Site: | Braidwood  |
|---|---|
| Report | IR 05000456/2009005 Section 1R06 |
| Date counted | Dec 31, 2009 (2009Q4) |
| Type: | URI: |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.06 |
| Inspectors (proximate) | A Garmoe B Dickson B Metrow B Palagi J Gall M Holmberg M Mitchell M Perry R Jickling R Ng R Skokowskij Benjamint Go M Perry A Garmoe R Skokowski C Scott S Bakhsh V Meghani C Lipa |
| INPO aspect | |
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Finding - Braidwood - IR 05000456/2009005 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Braidwood) @ 2009Q4
Self-Identified List (Braidwood)
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