05000263/FIN-2011004-01
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Finding | |
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| Title | |
| Description | On September 27, 2011, during an engineering self-assessment, the licensee identified a potential issue associated with the testing methodology used to demonstrate each EDGs capability to withstand the rejection of an electrical load that is equivalent to the single largest post-accident electrical load. On September 29, 2011, the licensee verified that their existing surveillance test OSP-ECC-0566, Low Pressure ECCS [emergency core cooling system ] Automatic Initiation and Loss of Auxiliary power Test, Revision 8, did not ensure that the load rejection test was performed with sufficient load to satisfy the requirements of SR 3.8.1.7 (Verify each EDG rejects a load greater than or equal to its associated single largest post-accident load and, following load rejection, the frequency is less than or equal to 67.5 Hz.). On September 29, 2011, at approximately 1700, the licensee declared both 11 and 12 EDGs inoperable and entered the Action for TS 3.8.1.E, Two EDGs Inoperable. At approximately 2200, the licensee requested enforcement discretion to extend the Action Completion Time for TS 3.8.1.F, from twelve hours to five days, to allow time to perform the required EDG load rejection testing. At approximately 23:58, the Agency granted NOED 11-3-001. The inspectors evaluation of the issue included a review of the technical documents associated with the issue and several meetings with the licensee management and technical staff. The initial information gained by the inspectors and their assessment of the issue was communicated to senior agency managers well in advance of the licensees NOED request, significantly contributing to the Agencys understanding and appropriate disposition of the issue. Additional information associated with the inadequate surveillance procedure and EDG operability is documented in Section 1R15 of this report. |
| Site: | Monticello  |
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| Report | IR 05000263/2011004 Section 1R15 |
| Date counted | Sep 30, 2011 (2011Q3) |
| Type: | URI: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.15 |
| Inspectors (proximate) | N Shah K Riemer M Phalen K Stoedter S Thomas P Voss M Learn A Scarbeary J Corujo -Sandin P Cardona-Morales S Bellm Munir C Zoia K Riemer M Phalen K Stoedter S Thomas R Walton P Voss J Beavers S Bell |
| INPO aspect | |
| Finding closed by | |
| IR 05000263/2011005 (1 February 2012) | |
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Finding - Monticello - IR 05000263/2011004 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Monticello) @ 2011Q3
Self-Identified List (Monticello)
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