A SCANA COMPANY

Ronald A. Jones Vice President

New Nuclear Operations

December 9, 2015

NND-15-0650 10 CFR 50.54

ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Document Control Desk Washington, DC 20555

Virgil C. Summer Nuclear Station (VCSNS) Units 2 and 3 Combined License Nos. NPF-93 and NPF-94 Docket Nos. 52-027 & 52-028

Subject: South Carolina Electric & Gas Company (SCE&G) Virgil C. Summer Nuclear Station Units 2 and 3 Response to Nuclear Regulatory Commission (NRC) Bulletin 2012-01, "Design Vulnerability in Electric Power System," Revision to Regulatory Commitment Dates

Reference: 1. NRC Letter Regarding "Bulletin 2012-01, Design Vulnerability in Electric Power System" Dated November 5, 2014 (Accession Number ML 14246A167)

2. South Carolina Electric & Gas Company (SCE&G) Virgil C. Summer Nuclear Station Units 2&3 Response to Nuclear Regulatory Commission (NRC) Bulletin 2012-01, "Design Vulnerability in Electric Power System," Issued November 5,2014 (Accession Number ML 15159A307)

An NRC public meeting was held on October 30,2014 with Southern Nuclear Operating Company (SNC) and SCE&G to discuss the SNC and SCE&G responses to NRC Bulletin 2012-01 "Design Vulnerability in Electric Power System" and provide the Licensees an opportunity to clarify previously submitted information. As a result of this meeting, the NRC staff issued Reference 1 .

On January 29, 2015 SCE&G submitted Reference 2 in response to Reference 1. In this letter, SCE&G committed to perform an analysis and implement any subsequent modifications to ensure that operations personnel can adequately detect an open phase condition and that the detection should alarm in the main control room. The target completion date for this commitment was indicated to be the end of the second maintenance/refueling outage for each unit.

This letter is provided to revise the commitment and completion date that was provided in Reference 2. The target date for completion of an analysis and any necessary modifications associated with open phase concerns addressed in NRC Bulletin 2012-01 will be prior to fuel load for each unit as stated in the enclosure to this letter.

Should you have any questions, please contact April Rice by telephone at (803) 941-9858, or by email atarice@scana.com.

SCE&G I New Nuclear Deployment. P. O. Box 88. Me 800. Jenkinsville, South Carolina 29065 • www.sceg.com

Document Control Desk NND-15-0650 Page 2 of 3

I declare under penalty of perjury that the foregoing is true and correct.

,':Y/' '" _ Executed on this 7 "'"day of £...((L'm6l?\" 2015.

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Enclosure 1: Regulatory Commitments Pertaining to Bulletin 2012-01, Design Vulnerability in Electric Power System

cc : Billy Gleaves Ruth Reyes Chandu Patel Paul Kallan Tom Fredette Tomy Nazario Len Wert Jim Reece Stephen A. Byrne Jeffrey B. Archie Ronald A. Jones Alvis J. Bynum Kathryn M. Sutton April Rice Justin Bouknight Brad Stokes Ajay Tiwari Trey Daniels Matt Kunkle Mory Diane Bryan Barwick Dean Kersey Margaret Felkel Cynthia Lanier Kristin Seibert Amanda Pugh Neil Haggerty Pat Young Michael Frankie

Document Control Desk NND-15-0650 Page 3 of 3

Sean Burk Brian Mcintyre Carl Churchman Joseph Cole Chuck Baucom Lisa Alberghini Curt Castell Ken Hollenbach Susan E. Jenkins William M. Cherry Rhonda O'Banion VCSummer2&3ProjectMail@cbi .com vcsummer2&3project@westinghouse.com DCRM-EDMS@SCANA.COM

South Carolina Electric & Gas Company

Virgil C. Summer Nuclear Station Units 2 and 3

NND-15-0650

Enclosure 1

Regulatory Commitments

Pertaining to

Bulletin 2012-01,

Design Vulnerability in Electric Power System

(This enclosure contains two pages including this cover page)

NNO-15-0650 Enclosure 1 Regulatory Commitments Pertaining to NRC Bulletin 2012-01

List of Regulatory Commitments

The following table identifies those actions committed to by South Carolina Electric & Gas Company in this submittal. Any other statements are provided for information purposes and are not considered to be regulatory commitments. Please direct questions regarding these commitments to April Rice at (803) 941-9858.

REGULATORY COMMITMENTS DUE DATE/EVENT

1. VCSNS Unit 2 will perform an analysis Prior to fuel load for VCSNS Unit 2. and implement any necessary modifications to ensure that operations personnel can adequately detect an open phase condition and that the detection should alarm in the main control room .

2. VCSNS Unit 3 will perform an analysis Prior to fuel load for VCSNS Unit 3. and implement any necessary modifications to ensure that operations personnel can adequately detect an open phase condition and that the detection should alarm in the main control room.

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