05000247/FIN-2010006-02
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Finding | |
|---|---|
| Title | Fire Scenario Resulting in Loss of Cooling Water to Charging Pumps |
| Description | The team identified a Green, Non-Cited Violation of 10 CFR 50, Appendix R, III,G.3, in that Entergy failed to provide one train of reactor coolant system makeup free of fire damage for the control room, cable spread room, electrical switchgear room, and cable tunnel fire zones for postulated fire scenarios. Specifically, Entergy failed to assure that one charging pump would remain free of fire damage for alternate shutdown fire scenarios that could produce a spurious trip of a component cooling water (CCW) pump. Entergy initiated condition report CR-IP2-201 0-00751 for long term resolution and promptly initiated hourly fire watches in all affected fire areas except for the cable tunnel as an interim compensatory measure. The cable tunnel was evaluated as not requiring an hourly fire watch and being sufficiently protected with installed fire detection and automatic fire suppression in addition to administrative controls that limit personnel access. This finding is more than minor because it is associated with the External Factors attribute (fire) of the Mitigating Systems Cornerstone and adversely affects the cornerstone objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences (ie., core damage). Specifically, the availability of the charging system was not ensured for postulated fires in alternative shutdown areas. The team used Phase 1, 2 and 3 risk assessment tools of IMC 0609, Appendix F, Fire Protection SDP, to determine that this finding was of very low safety significance (Green), with an estimated total core damage frequency in the low to mid E-7/year. Across-cutting aspect was not identified |
| Site: | Indian Point  |
|---|---|
| Report | IR 05000247/2010006 Section 1R05 |
| Date counted | Mar 31, 2010 (2010Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.05 |
| Inspectors (proximate) | J Richmond J Lilliendahl W Cook D Orr |
| INPO aspect | |
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Finding - Indian Point - IR 05000247/2010006 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Indian Point) @ 2010Q1
Self-Identified List (Indian Point)
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