ML081700281

Request for Extension to Complete the Final Confirmatory Analysis and Validation of Containment Sump Strainers Associated with NRC GL-04-002

ML081700281
Person / Time
Site:	Palo Verde
Issue date:	06/06/2008
From:	Mims D C Arizona Public Service Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
102-05861-DCM/RJR, GL-04-002
Download: ML081700281 (2)

Text

Generic Letter 2004-02 Dwight C. Mims Mail Station 7605 Palo Verde Nuclear Vice President Tel. 623-393-5403 P.O. Box 52034 Generating Station Regulatory Affairs and Plant Improvement Fax 623-393-6077 Phoenix, Arizona 85072-2034 102-05861 -DCM/RJR June 6, 2008 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555-0001

Subject:

Palo Verde Nuclear Generating Station (PVNGS)Units 1, 2, and 3 Docket Nos. STN 50-528, 50-529, and 50-530 Request for Extension to Complete the Final Confirmatory Analysis and Validation of Containment Sump Strainers Associated with NRC Generic Letter (GL) 2004-02 By letter no. 102-05779, dated December 10, 2007, Arizona Public Service Company (APS) submitted a request for an extension to complete the containment sump strainer confirmatory testing, analysis, and validation for PVNGS Units 1, 2, and 3 by June 30, 2008 (ADAMS Accession no. ML073531095).

By letter dated December 27, 2007, the NRC approved this extension request (ADAMS Accession no. ML073600747).

The installation of the new, larger containment sump strainers has been completed in all three PVNGS units. Plant specific chemical effects testing of the strainer design was performed by the strainer vendor, Control Components, Inc. (CCI), in 2007. Additional testing was recently completed by CCI, and observed by representatives from the NRC and APS, using more conservative parameters than the 2007 tests. The preliminary results from the recent tests confirmed the capability of the strainer design to perform its safety function.In order to complete the containment sump strainer test reports and update the design documentation to reflect the more conservative test criteria, APS is requesting to extend the commitment to complete the analysis and validation of containment sump strainers from June 30, 2008, to September 30, 2008, and submit the final GL 2004-02 response within 45 days of completion of the analysis and validation.

The basis for the acceptability of this extension remains the same as the basis provided in APS's December 10, 2007, extension request and in the December 27, 2007, NRC approval letter.A member of the STARS (Strategic Teaming and Resource Sharing) Alliance Callaway

• Comanche Peak 0 Diablo Canyon -Palo Verde

• South Texas Project

• Wolf Creek ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Request for Extension to Complete the Final Confirmatory Analysis and Validation GL 2004-02 Page 2 Contingent on NRC approval, APS commits to complete the containment sump strainer confirmatory analysis and validation for PVNGS Units 1, 2, and 3 by September 30, 2008. APS also commits to submit the final GL 2004-02 response within 45 days of the completion of the confirmatory analysis and validation.

If you have any questions, please contact Russell A. Stroud at (623) 393-511-1.

I declare under penalty of perjury that the foregoing is true and correct.Executed on _C-_/(_/OF Sincerely DCM/RAS/RJR/gat cc: E. E. Collins Jr.M. T. Markley R. I. Treadway NRC Region IV Regional Administrator NRC NRR Project Manager NRC Senior Resident Inspector for PVNGS