05000338/FIN-2008005-01
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Finding | |
|---|---|
| Title | Reactor Coolant Pump Motor Oil Collection System Installation and Design Problems |
| Description | Reactor Coolant Pump Motor Oil Collection System Installation and Design Problem
The inspectors identified a non-cited violation of the North Anna Power Plant Facility Renewed Operating Licensee NPF-4 & 7, Condition D, Fire Protection Program, which involved the failure to install adequate conduit penetration seals in various sections of the Units 1 and 2 reactor coolant pump motor oil collection systems, and inadequate oil lift pump enclosure vents which provided a direct escape path from the oil collection systems for potential oil spray from the lift pump and related oil piping leaks. The licensee entered these issues into their corrective action program which included development of compensatory actions until completion of all corrective actions. The finding was more than minor because it impacted the mitigating systems cornerstone objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences, and the related attribute of protection against external factors such as fire which could impact the operability of a reactor coolant pump (RCP). This finding had a credible impact on safety because the inadequate installation and fabrication of the oil collection system presented a degradation of a fire confinement component which has a fire prevention function of not allowing an oil leak to reach hot surfaces. The finding was of very low safety significance or Green because of the low degradation rating of the fire confinement category related to the reactor coolant pump (RCP) motor oil collection system, the extremely low frequency of RCP oil leaks and no actual RCP oil leaks during the past operating cycle, and other area fire protection defense-in-depth features such as automatic fire detection, manual suppression capability (fire brigade), and safe shutdown capability from the main control room. There was no cross-cutting aspect due to the legacy aspect relating to both examples. (Section 1R05 |
| Site: | North Anna  |
|---|---|
| Report | IR 05000338/2008005 Section 1R05 |
| Date counted | Dec 31, 2008 (2008Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.05 |
| Inspectors (proximate) | R Hamilton W Loo J Reece C Welch E Lea G Mccoy R Clagg A Vargas |
| INPO aspect | |
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Finding - North Anna - IR 05000338/2008005 | ||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (North Anna) @ 2008Q4
Self-Identified List (North Anna)
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