ML090360588

Final Supplemental Environmental Impact Statement - Severe Accident Management Alternatives

ML090360588
Person / Time
Site:	Watts Bar
Issue date:	01/27/2009
From:	Bajestani M Tennessee Valley Authority
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
TAC MD8203
Download: ML090360588 (3)

Text

Tennessee Valley Authority, Post Office Box 2000, Spring City, Tennessee 37381-2000 January 27, 2009 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Mail Stop: OWFN P1-35 Washington, D.C. 20555-0001 In the Matter of ) Docket No. 50-391 Tennessee Valley Authority

)WATTS BAR NUCLEAR PLANT (WBN) UNIT 2 -FINAL SUPPLEMENTAL ENVIRONMENTAL IMPACT STATEMENT

-SEVERE ACCIDENT MANAGEMENT ALTERNATIVES (TAC MD8203)

References:

1. TVA letter dated February 15, 2008, 'Watts Bar Nuclear Plant (WBN) -Unit 2 -Final Supplemental Environmental Impact Statement for the Completion and Operation of Unit 2" 2. NRC letter dated June 3, 2008, 'Watts Bar Nuclear Plant, Unit 2 -Request for Supplemental Information for Review of Supplemental Environmental Statement (TAC MD8203)" 3. TVA letter dated July 2, 2008, "Watts Bar Nuclear Plant (WBN) -Unit 2 -Final Supplemental Environmental Impact Statement

-Request for Additional Information (TAC MD8203)" The purpose of this letter is to provide the Severe Accident Management Alternatives (SAMA) analysis report for WBN Unit 2. The WBN Unit 2 Final Supplemental Environmental Impact Statement for the Completion and'Operation of WBN Unit 2 (June 2007) was submitted to NRC on February 15, 2008 (Reference 1). NRC requested additional information by letter dated June 3, 2008 (Reference 2). By letter dated July 2, 2008 (Reference 3), TVA responded to the NRC request for additional information and provided an open action required for licensing to submit by January 30, 2009, a WBN Unit 2 SAMA analysis consistent in scope and content with the SAMA analyses provided in support of recent license renewal applications.

U.S. Nuclear Regulatory Commission Page 2 January 27, 2009 To ensure that the WBN Unit 2 SAMA analysis is consistent in scope and content with recent SAMA analyses for license renewal, TVA followed the methodology in the Nuclear Energy Institute's (NEI) SAMA Analysis Guidance Document (NEI 05-01 [Rev. A]).Enclosure 1 provides the SAMA report. The report documents the development of a risk model to evaluate WBN Unit 2 severe accidents, the identification of SAMA candidates, and a cost benefit analysis of the candidates.

A multiplication factor was applied to the internal event results to account for the contribution to core damage frequency from external events.The results of the SAMA evaluation identified four potentially cost beneficial procedural changes and one potentially cost beneficial training enhancement.

Enclosure 2 provides the listing of open actions required for licensing identified in Enclosure 1.If you have any questions, please contact me at (423) 365-2351.Sincerely, Masoud B-1stani Watts Bar unit 2 Vice President Enclosures cc: See page 3 U.S. Nuclear Regulatory Commission Page 3 January 27, 2009 cc (Enclosures):

Lakshminarasimh Raghavan U.S. Nuclear Regulatory Commission MS 08H4A One White Flint North 11555 Rockville Pike Rockville, Maryland 20852-2738 Patrick D. Milano, Senior Project Manager U.S. Nuclear Regulatory Commission MS 08H4 One White Flint North 11555 Rockville Pike Rockville, Maryland 20852-2738 Loren R. Plisco, Deputy Regional Administrator for Construction U. S. Nuclear Regulatory Commission Region II Sam Nunn Atlanta Federal Center 61 Forsyth Street, SW, Suite 23T85 Atlanta, Georgia 30303-8931 U. S. Nuclear Regulatory Commission Region II Sam Nunn Atlanta Federal Center 61. Forsyth Street, SW, Suite 23T85 Atlanta, Georgia 30303-8931 NRC Resident Inspector Unit 2 Watts Bar Nuclear Plant 1260 Nuclear Plant Road Spring City, Tennessee 37381