ML11222A104

Watt Bar Nuclear Plant, Unit 2, Cyber Security Implementation Schedule Clarification

ML11222A104
Person / Time
Site:	Watts Bar
Issue date:	08/04/2011
From:	Stinson D Tennessee Valley Authority
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
Download: ML11222A104 (2)

Text

SECURITY-RELATED INFORMATION

-WITHHOLD UNDER 10 CFR 2.390 Tennessee Valley Authority, Post Office Box 2000, Spring City, Tennessee 37381-2000 August 4, 2011 10 CFR 50.4 10 CFR 73.54 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555-0001 Watts Bar Nuclear Plant, Unit 2 NRC Docket No. 50-391

Subject:

WATTS BAR NUCLEAR PLANT (WBN) UNIT 2 -CYBER SECURITY IMPLEMENTATION SCHEDULE CLARIFICATION

References:

1. Letter from TVA to NRC, "Watts Bar Nuclear Plant (WBN) Unit 2 -Cyber Security Implementation Schedule Including Systems Common to WBN Unit 1, dated June 10, 2011.The purpose of this letter is to respond to questions raised during discussions with the NRC Staff on July 28, 2011, regarding a request to implement changes to one system affecting Watts Bar Unit 2 concurrent with TVA's Nuclear Fleet Wide implementation schedule.Enclosure 1 contains TVA's response to questions.

Enclosure 2 provides supporting information, via several attachments divided into four groups.Both Enclosures 1 and 2 (including attachments) contain security-related information.

TVA requests that Enclosures 1 and 2 be withheld from public disclosure in accordance with 10 CFR 2.390, "Public inspections, exemptions, requests for withholding." There are no new regulatory commitments contained in this letter.SECURITY-RELATED INFORMATION -WITHHOLD UNDER 10 CFR 2.390 ENCLOSURES AND ATTACHMENTS TO THIS LETTER CONTAINS SECURITY-RELATED INFORMATION.

SECURITY-RELATED INFORMATION CLASSIFICATION DOES NOT APPLY TO THIS PAGE WHEN SEPARATED FROM ENCLOSURES AND ATTACHMENTS.

SECURITY-RELATED INFORMATION

-WITHHOLD UNDER 10 CFR 2.390 U.S. Nuclear Regulatory Commission Page 2 August 4, 2011 If you have any questions, please contact Bill Crouch at (423) 365-2004.I declare under penalty of perjury that the foregoing is true and correct. Executed on the 4 th day of August, 2011.Respectfully, David Stinson Watts Bar Unit 2 Vice President

Enclosures:

1. Additional Information Regarding the Cyber Security Schedule of Selected Watts Bar Unit 2 Systems 2. Supporting Documentation for Additional Information Regarding the Cyber Security Schedule of Selected Watts Bar Unit 2 Systems Attachments:

1. CECC Dose Telephone Risk Assessment

2. Corporate EP Remediation Actions 3. Emergency Paging System Risk Assessment

4. Prompt Notification System Risk Assessment cc (Enclosures):

U. S. Nuclear Regulatory Commission Region II Marquis One Tower 245 Peachtree Center Ave., NE Suite 1200 Atlanta, Georgia 30303-1257 NRC Resident Inspector Unit 2 Watts Bar Nuclear Plant 1260 Nuclear Plant Road Spring City, Tennessee 37381 SECURITY-RELATED INFORMATION

-WITHHOLD UNDER 10 CFR 2.390 ENCLOSURES AND ATTACHMENTS TO THIS LETTER CONTAINS SECURITY-RELATED INFORMATION.

SECURITY-RELATED INFORMATION CLASSIFICATION DOES NOT APPLY TO THIS PAGE WHEN SEPARATED FROM ENCLOSURES AND ATTACHMENTS.