05000315/FIN-2015003-07
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Finding | |
|---|---|
| Title | Licensee-Identified Violation |
| Description | A finding of very low safety significance (Green) with an associated NCV of TS 3.5.2, Emergency Core Cooling System-Operating, was identified by th
licensee for the failure to properly address an oil leak on the Unit 1 East RHR Pump. A leak was identified in March of 2015 and assessed to have n operability impact. Following entry into Mode 5, Cold Shutdown, for the 1AB EDG repairs in June 2015, the leak was again identified and written-up in the CAP. The operability determination performed identified that given the rate of leakage, the pump would not have been able to operate for its thirty-day mission time. A past operability assessment was performed which determined the pump would not have fulfilled the mission time when the pump was required to be operable per TS in Modes 14. This should have been identified when the leak was discovered in March. TS 3.5.2 requires two RHR trains to be operable in Modes 14. Contrary to this requirement, the East RHR train was inoperable between March and June of 2015. The issue was more than minor because it adversely affected the equipment performance attribute of the Mitigating Systems cornerstone, with the objective of ensuring the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. The finding screened as Green because the pump would have been able to perform for at least its 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> PRA mission time. The inspectors conclusions regarding significance were confirmed after consultation with a regional Senior Risk Analyst. The issue was entered into the CAP as AR20158659 and AR20157898. |
| Site: | Cook  |
|---|---|
| Report | IR 05000315/2015003 Section 4OA7 |
| Date counted | Sep 30, 2015 (2015Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | J Ellegood J Lennartz J Mancuso K Riemer M Garza M Learn R Edwards R Elliott T Taylor |
| Violation of: | Technical Specification |
| INPO aspect | |
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Finding - Cook - IR 05000315/2015003 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Cook) @ 2015Q3
Self-Identified List (Cook)
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