ML111160544

E-mail, Revised Draft Request for Additional Information on Revision of Feedwater Line Break with Loss of Offsite Power and Single Failure Analysis

ML111160544
Person / Time
Site:	Palo Verde
Issue date:	04/26/2011
From:	Lauren Gibson Plant Licensing Branch IV
To:	Stroud R Arizona Public Service Co
Gibson, Lauren, NRR/DORL/LPL4, 415-1056
Shared Package
ML111160543	List: ML111160544
References
TAC ME4596, TAC ME4597, TAC ME4698
Download: ML111160544 (1)

Text

From: Gibson, Lauren Sent: Tuesday, April 26, 2011 3:21 PM To: Russell.Stroud@aps.com Cc: Carl.Stephenson@aps.com; Douglas.Spaulding@aps.com

Subject:

Revised Draft Request for Additional Information- Revision of Feedwater Line Break with Loss of Offsite Power and Single Failure Analysis (TAC Nos.

ME4596,7,8)

Attachments: Revised Draft Request for Additional Information .pdf April 26, 2011 Mr. Russell A. (Rusty) Stroud Licensing Section Leader Regulatory Affairs Palo Verde Nuclear Generating Station Arizona Public Service Company

Rusty, By a letter dated August 27, 2010 (Agencywide Documents Access and Management System (ADAMS) Accession No.ML102510161), Arizona Public Service Company (APS) requested a license amendment to Operating Licenses NPF-41, NPF-51, and NPF-74, for Palo Verde Nuclear Generating Station (PVNGS) Units 1, 2, and 3 respectively, to allow credit for reducing the available time for an existing manual operator action to initiate pressurizer level control. The revised analysis would assume that the action is initiated at twenty minutes into the scenario as opposed to the current assumption of thirty minutes. The staff requested additional information in its letter dated December 21, 2010 (ADAMS Accession No.ML103500510). The licensee responded with supplementary information in its submittal dated February 11, 2011 (ADAMS Accession No. ML110550323).

The NRC staff has reviewed the information provided by APS and determined that the additional information requested in the attachment to this e-mail message is needed to complete its review of the LAR. A previous draft version of the additional information requested was sent to the licensee via e-mail on April 1, 2011. A conference call was held on April 26, 2011 to clarify the draft request for additional information. The attachment to this e-mail reflects the clarifications that were made during the conference call. As also discussed during call, in order to complete our review of the LAR in a timely manner, please submit your response to the attached RAI by May 20, 2011.

Sincerely, Lauren Gibson, Project Manager Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation USNRC (301) 415-1056 Lauren.Gibson@nrc.gov