ML103080030

Severe Accident Management Alternatives Using Latest Computer Aided Fault Tree Analysis Model - Additional Information

ML103080030
Person / Time
Site:	Watts Bar
Issue date:	11/01/2010
From:	Bajestani M Tennessee Valley Authority
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
TAC MD8203
Download: ML103080030 (3)

Text

Withhold from Public Disclosure Under 10 CFR 2.390 Tennessee Valley Authority, Post Office Box 2000, Spring City, Tennessee 37381-2000 November 1, 2010 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555-0001 Watts Bar Nuclear Plant, Unit 2 Docket No. 50-391

Subject:

Watts Bar Nuclear Plant (WBN) Unit 2 - Severe Accident Management Alternatives Using Latest Computer Aided Fault Tree Analysis Model -

Additional Information (TAC MD8203)

Reference:

1. TVA letter dated October 14, 2010, 'Watts Bar Nuclear Plant (WBN) Unit 2 -

Severe Accident Management Alternatives Using Latest Computer Aided Fault Tree Analysis Model (TAC MD8203)" (ML102870253)

The purpose of this letter is to provide revised information concerning the Severe Accident Management Alternatives (SAMA) analysis report for WBN Unit 2. By letter dated October 14, 2010 (Reference), TVA provided the WBN Unit 2 SAMA report using the new Computer Aided Fault Tree Analysis (CAFTA) based model to evaluate Unit 2 severe accidents. The report attached to the October 14, 2010 letter contained information that was not intended to be submitted to the NRC. TVA requests that its October 14, 2010 letter be withdrawn and replaced with the information contained in this letter. Enclosure 1 of this letter provides a revised WBN Unit 2 SAMA report using the new CAFTA model. Enclosure 1 contains security-related information, and TVA requests this information be withheld from public disclosure in accordance with the provisions of 10 CFR 2.390.

If you have any questions, please contact me at (423) 365-2351.

Sincerely, 7Masoud aj stani wafts r nit 2 Vice President : Watts Bar Unit 2 Severe Accident Mitigation Alternatives Report dated October 4, 2010

U.S. Nuclear Regulatory Commission Page 2 November 1, 2010 Enclosure cc: U. S. Nuclear Regulatory Commission Region II Marquis One Tower 245 Peachtree Center Ave., N.E., Suite 1200 Atlanta, Georgia 30303-1257 NRC Resident Inspector Unit 2 Watts Bar Nuclear Plant 1260 Nuclear Plant Road Spring City, Tennessee 37381

Withhold from Public Disclosure Under 10 CFR 2.390 Enclosure I Watts Bar Unit 2 Severe Accident Mitigation Alternatives Dated October 4, 2010