ML091000659

Response to Supplemental Request for Additional Information Associated with Cyber Security Features of Reactor Protective System and Engineered Safeguards Protective System Digital Upgrade

ML091000659
Person / Time
Site:	Oconee
Issue date:	04/03/2009
From:	Baxter D Duke Energy Carolinas
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
Download: ML091000659 (2)

Text

~Duke DAVE BAXTER Dukery Vice President

& s~nergy.

Oconee Nuclear Station Duke Energy ON01 VP / 7800 Rochester Highway Seneca, SC 29672 April 3, 2009 864-873-4460 864-873-4208 fax dabaxter@dukeenergy.com U. S. Nuclear Regulatory Commission Attn:

Document Control Desk Washington, DC 20555-0001

Subject:

Duke Energy Carolinas, LLC Oconee Nuclear Station, Units 1, 2, and 3 Docket Nos. 50-269, 50-270, 50-287 Response to Supplemental Request-.fbr Additional Information Associated with Cyber Security Features of the Oconee Nuclear Station Reactor Protective System and Engineered Safeguards Protective System Digital Upgrade On January 30, 2008, Duke Energy Carolinas, LLC (Duke) submitted a letter addressing the cyber security features of the Reactor Protective System (RPS) and Engineered Safeguards Protective System (ESPS) design change. The proposed change replaces the current analog based RPS/ESPS with a digital computer based RPS/ESPS. Duke responded to a September 26, 2008, request for additional information (RAI) associated with this LAR by letter dated November 6, 2008. By letter dated March 9, 2009, NRC issued a supplemental RAI. The enclosure contains Duke's responses to this supplemental RAI.

The enclosure contains a description of design features that secure the RPS/ESPS from electronic vulnerabilities. As such, Duke considers the information in the enclosure to be sensitive information and requests that it be withheld from public disclosure pursuant to 10 CFR 2.390.

If there are any questions regarding this submittal, please contact Boyd Shingleton at (864) 873-4716.

I declare under penalty of perjury that the foregoing is true and correct. Executed on April 3, 2009.

Sincerely, DaveVice President Oconee Nuclear Station

Enclosure:

RPS/ESPS Cyber Security Features - RAI Response AoOI Enclosure contains Sensitive Information-Withhold under 10 CFR 2.390 0C) I www. duke-energy. com kOPA-

U. S. Nuclear Regulatory Commission

,April 3, 2009 Page 2 cc:

Mr. J. F. Stang, Project Manager Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Mail Stop 0-14 H25 Washington, D. C. 20555 Mr. L. A. Reyes, Regional Administrator U. S. Nuclear Regulatory Commission - Region II Atlanta Federal Center 61 Forsyth St., SW, Suite 23T85 Atlanta, Georgia 30303 Mr. G.A. Hutto Senior Resident Inspector Oconee Nuclear Station S. E. Jenkins, Manager Infectious and Radioactive Waste Management Section 2600 Bull Street Columbia, SC 29201 Enclosure contains Sensitive Information-Withhold under 10 CFR 2.390