05000382/FIN-2010005-01
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Finding | |
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| Title | Foreign Material Exclusion Issue associated with the Condensate Storage Pool Gooseneck Vent |
| Description | The inspectors identified an issue of concern related to debris entering the condensate storage pool from an eight-inch diameter vent line located in the component cooling water pump room B. On December 16, 2010, during inspections of the component cooling water pump rooms for flooding protection, the inspectors identified several concerns. The inspectors noticed an 8 inch diameter, 6 foot tall gooseneck vent line in component cooling water pump room B that was not included or discussed in the flooding evaluation provided in Updated Final Safety Analysis Report section 3.6A.6.4.2.3. The inspectors were concerned for debris possibly entering the condensate storage pool from component cooling water pump Room B. The inspectors did not notice any screen, design feature, or foreign material exclusion device on the vent. Updated Final Safety Analysis Report section 10.4.9B.3.2 discusses common cause failures for the emergency feedwater system, whose pumps take suction on the condensate storage pool. Updated Final Safety Analysis Report section 10.4.9B.3.2.g states, in part, that particles/corrosion associated with condensate storage pool would be small and not credible. The vent line is an 8 inch open pathway into the condensate storage pool. The inspectors have not reviewed the licensees foreign material exclusion procedure(s), or note what the maximum particle size that is allowed in the condensate storage pool. This issue of concern will be treated as an unresolved item pending the review of additional information from the licensee related to a potential for a common mode failure of the emergency feedwater system due to debris: URI 05000382/2010005-01; Foreign Material Exclusion Issues associated with the Condensate Storage Pool Gooseneck Vent. |
| Site: | Waterford  |
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| Report | IR 05000382/2010005 Section 1R06 |
| Date counted | Dec 31, 2010 (2010Q4) |
| Type: | URI: |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.06 |
| Inspectors (proximate) | D Overland S Makor N Greene C Smith P Elkmann M Davis L Carson R Azual Ricketsonp Elkmann M Davis D Jones T Burns J Clark D Overland R Latta C Steely N Greene P Prescott |
| INPO aspect | |
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Finding - Waterford - IR 05000382/2010005 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Waterford) @ 2010Q4
Self-Identified List (Waterford)
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