05000220/FIN-2012003-01
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Finding | |
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| Title | Loss of Spent Fuel Pool Cooling due to Inadequate Procedure. |
| Description | A self-revealing NCV of TS 5.4.1, Procedures, was identified for NMPNS failure to provide an adequate procedure for spent fuel pool (SFP) cooling system restoration. Specifically, procedure N2-PM-082, RPV Floodup/Draindown, Revision 00600, did not contain adequate guidance for restoring the spent fuel cooling (SFC) system from single to two skimmer surge tank operation during a medium risk configuration for decay heat removal. As a result, on May 17, 2012 SFP cooling was lost when the A SFP pump tripped on low suction pressure. NMPNS restored SFP cooling within 30 minutes and entered this issue into its corrective action program as CR 2012-004850. This finding is more than minor because it affects the Barrier Integrity Cornerstone attribute of maintaining the functionality of the SFC system to provide reasonable assurance that physical design barriers protect the public from radiological releases caused by accidents or events. The finding was determined to be of very low safety significance (Green), due to it not being associated with a loss of cooling to the SFP that would have precluded restoration prior to boiling, a fuel handling error, or loss of SFP inventory. Specifically, control room operators had a contingency plan in place to restore the loss of SFC if it were to occur. This finding has a cross-cutting aspect in the area of human performance, resources, because NMPNS did not ensure that procedures were adequate to ensure nuclear safety. Specifically, procedure N2-PM-082 did not provide adequate instructions to establish a valve lineup that would ensure that the SFP cooling pump had sufficient suction pressure. |
| Site: | Nine Mile Point  |
|---|---|
| Report | IR 05000220/2012003 Section 1R13 |
| Date counted | Jun 30, 2012 (2012Q2) |
| Type: | NCV: Green |
| cornerstone | Barrier Integrity |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71111.13 |
| Inspectors (proximate) | P Kaufman D Dempsey R Fuhrmeister K Kolaczyk J Furia E Gray G Dentel J Nicholson B Dionne E Miller |
| CCA | H.7, Documentation |
| INPO aspect | WP.3 |
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Finding - Nine Mile Point - IR 05000220/2012003 | |||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Nine Mile Point) @ 2012Q2
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