ML19309E524

Supplemental Response to Request for Additional Information to License Amendment Request to Adopt Emergency Action Level Schemes Pursuant to NEI 99-01, Rev. 6

ML19309E524
Person / Time
Site:	Millstone, Surry, North Anna, 07200002, 07200055
Issue date:	10/30/2019
From:	Mark D. Sartain Dominion Energy Nuclear Connecticut, Dominion Energy Services, Virginia Electric & Power Co (VEPCO)
To:	Document Control Desk, Office of Nuclear Material Safety and Safeguards, Office of Nuclear Reactor Regulation
Shared Package
ML19309E523	List: ML19309E524
References
19-296A
Download: ML19309E524 (4)

Text

Dominion Energy Services, Inc.

5000 Dominion Boulevard. Glen Allen, VA 23060 Dominion Energy.com

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Dominion Energy October 30, 2019 10 CFR 50.90 U. S. Nuclear Regulatory Commission Serial No.: 19-296A Attention: Document Control Desk NRA/DEA: R1 Washington, DC 20555-0001 Docket Nos.: 50-336/423.

50-3.38/339 50a.280/281 72-2/16/47/55/56 License Nos.: DPR-65 NPF-49

~PF-4/7 DPR-32/37 SNM-2501/2507 VIRGINIA ELECTRIC AND POWER COMPANY DOMINION ENERGY NUCLEAR CONNECTICUT, INC.

MILLSTONE POWER STATION UNITS 2 AND 3 NORTH ANNA POWER STATION UNITS 1 AND 2 SURRY POWER STATION UNITS 1 AND 2 LICENSE AMENDMENT REQUEST TO ADOPT EMERGENCY ACTION LEVEL (EAL) SCHEMES PURSUANT TO NEI 99-01, REV. 6 SUPPLEMENTAL RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION By letter dated January 4, 2019 (Agencywide Documents Access and Management System (ADAMS) Accession Number ML19011A237) (Serial No.18-364), Dominion Energy Nuclear Connecticut, Inc. (DENC) and Virginia Electric and Power Company submitted a request for a change to the emergency action level schemes for Millstone Power Station (MPS) - Units 1, 2 and 3, North Anna Power Station (NAPS) - Units 1 and 2, and Surry Power Station (SPS) - Units 1 and 2.

By letter dated August 29, 2019, (ADAMS Accession Number ML19249B764) (Serial No.19-296) Dominion Energy submitted the response to specific NRC requests for additional information (RAls), received in an email dated June 17, 2019 (ADAMS Accession Number ML19169A096).

On September 6, 2019, a teleconference was held between Dominion Energy and NRC staff to discuss the response to RAI 13.a and clarify NRC staff information needs. The purpose of this letter is to provide the NRC staff with additional information and clarifications to address safety evaluation needs. Enclosure 1 provides a supplemental response to RAI 13.a. Enclosures 2 through 5 provide the Final (Updated) EAL Technical Bases Document for MPS Unit 2, MPS Unit 3, NAPS, and SPS, respectively, which reflect the supplemental response to RAI 13.a.

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Serial No. 19-296A Docket Nos.: 50-336/423/338/339/280/281 72-2/16/4 7/55/56 Supplemental Response to RAI - EAL Scheme Change Page 2 of 4 Additionally, following the August 29, 2019 RAI response submittal, an administrative error was identified in the EAL Comparison Tables for Millstone 2 and Millstone 3 supporting the response to RAI 4 that was provided in Enclosure 1, Attachment 2.

Specifically, the tables included individual alert and alarm setpoints since some release points are monitored by multiple detectors, each capable to have individual alert and alarm setpoints. The tables have been updated to indicate the setpoint value that will initiate an alarm in the control room either before or at the Unusual Event threshold.

As a result, corrected RAI 4 - EAL Comparison Tables provided in Enclosure 6 to this letter are hereby transmitted and supersede Enclosure 1, Attachment 2 of Dominion letter Serial No.19-296 dated August 29, 2019 in its entirety. All other enclosures stand as originally transmitted by the August 29, 2019 Dominion letter.

The information provided in this letter does not affect the conclusions of the significant hazards consideration or the environmental assessment included in the January 4, 2019 LAR.

Should you have any questions or require additional information, please contact Ms. Diane E. Aitken at (804) 273-2694.

Sincerely, Mark D. Sartain Vice President - Nuclear Engineering and Fleet Support Dominion Energy Nuclear Connecticut, Inc.

Virginia Electric and Power Company COMMONWEALTH OF VIRGINIA COUNTY OF HENRICO The foregoing document was acknowledged before me, in and for the County and Commonwealth aforesaid, today by Mark D. Sartain, who is Vice President - Nuclear Engineering and Fleet Support, of Dominion Nuclear Energy Connecticut, Inc. and Virginia Electric and Power Company. He has affirmed before me that he is duly authorized to execute and file the foregoing document in behalf of those companies, and that the statements in the document are true to the best of his knowledge and belief.

Acknowledged before me this ~~ day of Oc...~b-1-r , 2019.

My Commission Expires: ~ '51, 'to'L-3

Serial No. 1'9-296A

• Docket Nos.: 50-336/423/338/339/280/281 72-2/16/47/55/56 Supplemental Response to RAI - EAL Scheme Change Page 3 of 4 Commitments contained in this letter: None

Enclosures:

1. Supplemental Response to RAI 13.a

2. MPS2 EAL Technical Bases Document - Final (Updated)

3. MPS3 EAL Technical Bases Document - Final (Updated)

4. NAPS EAL Technical Bases Document - Final (Updated)

5. SPS EAL Technical Bases Document - Final (Updated)

6. Superseded S/N 19-296 Enclosure 1, Attachment 2, RAI 4 - EAL Comparison Tables cc: U. S. Nuclear Regulatory Commission, Region I Attn.: Regional Administrator 2100 Renaissance Blvd.

Suite 100 King of Prussia, Pennsylvania 19406-2713 U. S. Nuclear Regulatory Commission, Region II Attn.: Regional Administrator Marquis One Tower 245 Peachtree Center Ave., NE, Suite 1200 Atlanta, Georgia 30303-1257 Director, Division of Spent Fuel Storage and Transportation Office of Nuclear Material Safety and Safeguards U. S. Nuclear Regulatory Commission Washington, DC 20555-0001 Ms. Yen-Ju Chen NRG Senior Project Manager U. S. Nuclear Regulatory Commission Two White Flint North Mail Stop 4834 11545 Rockville Pike Rockville, MD 20852-2738 Mr. J. N. Nguyen NRG Senior Project Manager U. S. Nuclear Regulatory Commission Two White Flint North Mail Stop 4834 11545 Rockville Pike Rockville, MD 20852-2738

Serial No. 19-296A Docket Nos.: 50-336/423/338/339/280/281 72-2/16/47/55/56 Supplemental Response to RAJ - EAL Scheme Change

• Page 4 of 4 Mr. R. V. Guzman NRC Senior Project Manager Millstone Units 2 & 3 U.S. Nuclear Regulatory Commission One White Flint North Mail Stop 08 C-2 11555 Rockville Pike Rockville, MD 20852-2738 Mr. G. Edward Miller NRC Senior Project Manager North Anna and Surry U. S. Nuclear Regulatory Commission One White Flint North Mail Stop 09 E-3 11555 Rockville Pike Rockville, MD 20852-2738 Mr. Marcus Harris Old Dominion Electric Cooperative Innsbrook Corporate Center 4201 Dominion Blvd. - Suite 300 Glen Allen, VA 23060 Director, Radiation Division Department of Energy and Environmental Protection 79 Elm Street Hartford, CT 06106-5127 State Coordinator of Emergency Management Virginia Department of Emergency Management 10501 Trade Court

• North Chesterfield, VA 23236 NRC Senior Resident Inspector Millstone Power Station NRC Senior Resident Inspector North Anna Power Station NRC Senior Resident Inspector Surry Power Station