05000259/FIN-2014002-01
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Finding | |
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| Title | |
| Description | The inspectors identified a URI for the licensees failure to adhere to General Specification 40 (G-40) for Installation, Modification, and Maintenance of Electrical Systems section 3.5.7 which required standing water in hand holes be kept below any safety related cables. Hand hole number 26 had standing water above several of the RHR service water (safety related) power cables. Browns Ferry has RHR service water pump power cables routed underground for protection from potential hazards. There are two divisions of RHR service water pumps. One division has power cables routed through hand hole number 26. A hand hole is an underground cable vault that is accessible from above ground by removing an access cover. Browns Ferry inspected the hand hole for standing water at least once per year as a license renewal commitment due to a history of power cable failures due to wetting. The most recent failure of these power cables occurred in 2007 which prompted the licensee to replace the power cables with a water impervious design built to the draft IEEE 1142-2009 standards. TVAs guidance for electrical cable installation, modification, and maintenance in General Specification G-40 section 3.5.7 states in part that hand holes shall be maintained free of standing water to the extent practical. Standing water as a result of low areas, surfaces designed to drain to other sumps, or surfaces designed for minimal water levels (i.e., hand holes) is acceptable as long as the water level in the hand holes containing safety related cables is below all cables and electrical devices. During a licensee inspection of hand hole number 26 on January 17, 2014, the licensee discovered that standing water covered several of the RHR service water power (safety related) cables. As of April 1, 2014, the standing water had not been removed. The licensee planned to remove the standing water under work order (WO) 115447734 as documented in PER 834650 and 836589. URI 05000259, 260, 296/2014-002-01, RHRSW pump power cables submerged in water in Hand hole 26 contrary to TVA General Specification G-40, was opened to allow for an NRC verification of the power cables rating for continuous submergence to determine if this performance deficiency is more than minor. |
| Site: | Browns Ferry  |
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| Report | IR 05000259/2014002 Section 1R06 |
| Date counted | Mar 31, 2014 (2014Q1) |
| Type: | URI: |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.06 |
| Inspectors (proximate) | A Nielsen C Fontana C Kontz D Dumbacher J Bartley L Pressley R Kellner S Sanchez T Stephenc Kontzd Dumbacher J Bartley L Pressley M Coursey R Hamilton T Stephen W Pursley |
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Finding - Browns Ferry - IR 05000259/2014002 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Browns Ferry) @ 2014Q1
Self-Identified List (Browns Ferry)
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