RA-20-0037, Response to Nrg Request for Additional Information (RAI) Regarding NAC Magnastor Cask Loaded to Incorrect Helium Backfill Density

Response to Nrg Request for Additional Information (RAI) Regarding NAC Magnastor Cask Loaded to Incorrect Helium Backfill Density

ML20052D934
Person / Time
Site:	McGuire, 07201031, Mcguire
Issue date:	02/03/2020
From:	Teresa Ray Duke Energy Carolinas
To:	Document Control Desk, Office of Nuclear Material Safety and Safeguards, Office of Nuclear Reactor Regulation
Shared Package
ML20052D932	List: ML20052D936 RA-20-0037, Response to Nrg Request for Additional Information (RAI) Regarding NAC Magnastor Cask Loaded to Incorrect Helium Backfill Density
References
CAC 001028, EPID L-2019-LLE-0024, RA-20-0037
Download: ML20052D934 (7)

Text

Thomas D. Ray, P.E.

t_.., DUKE Site Vice President McGuire Nuclear Station ENERGY Duke Energy MG01VP I 12700 Hagers Ferry Road Huntersville, NC 28078 o: 980.875.4805 f: 980.875.4809 Tom .Ray@duke-energy.com PROPRIETARY INFORMATION-WITHHOLD UNDER 10 CFR 2.390 UPON REMOVAL OF THE ENCLOSED DIGITAL VERSATILE DISC (DVD) THIS LETTER IS UNCONTROLLED RA-20-0037 10 CFR Part 72 February 3, 2020 ATTN: Document Control Desk Director, Division of Spent Fuel Storage and Transportation Office of Nuclear Material Safety and Safeguards U.S. Nuclear Regulatory Commission Washington, DC 20555-0001 Duke Energy Carolinas, LLC (Duke Energy)

McGuire Nuclear Station, Units 1 and 2 Docket Nos. 50-369, 50-370, 72-1031 Renewed License Nos. NPF-9 and NPF-17 CAC No. 001028 EPID No. L-2019-LLE-0024

Subject:

Response to NRG Request For Additional Information (RAI) Regarding NAC MAGNASTOR Cask Loaded to Incorrect Helium Backfill Density

References:

1. Duke Energy letter, Exemption Request for NAC MAGNASTOR Cask Loaded to Incorrect Helium Backfill Density, dated September 12, 2019 (ADAMS Accession No. ML19270E738)

2. NRG letter, Exemption Request For NAG MAGNASTOR Cask Loaded to Incorrect Helium Backfill Density- Request For Additional Information, dated January 7, 2020 (ADAMS Accession No. ML19354B637)

In Reference 1, Duke Energy Carolinas, LLC (Duke Energy) submitted an exemption request to the U.S. Nuclear Regulatory Commission (NRG) for NAC MAGNASTOR Cask OFCTKN045 due to a noncompliance with the terms and conditions of the NAG MAGNASTOR Certificate of Compliance (CoC) No. 1031, Amendment 7, at the time of loading.

By letter dated January 7, 2020 (Reference 2), the NRC staff requested additional information from Duke Energy that is needed to determine compliance with 10 CFR 72.122(a) and (b ).

www.duke-energy.com .

J/vJS 5 ZLj-PROPRIETARY INFORMATION-WITHHOLD UNDER 10 CFR 2.390 UPON REMOVAL OF THE ENCLOSED DIGITAL VERSATILE DISC (DVD) THIS LETTER IS UNCONTROLLEAJ,{./SS zIp iJ/("-

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PROPRIETARY INFORMATION-WITHHOLD UNDER 10 CFR 2.390 UPON REMOVAL OF THE ENCLOSED DIGITAL VERSATILE DISC (DVD) THIS LETTER IS UNCONTROLLED U.S. Nuclear Regulatory Commission Document Control Desk Serial: RA-20-0037 Page 2 Duke Energy's response to Reference 2 is provided via this letter and its enclosures, which include propriety information. The propriety information is provided in portable document format (PDF) on the enclosed digital versatile disk (DVD) and includes the following documents:

• Calculation MCC-1553.12-00-0048, MNS TSC-099 Helium Overfill Canister Structural Analysis, Revision 0. This document addresses all three RAI questions (1.a, 1.b, and 1.c) and contains information propriety to NAC International.

• Design Input 30002-01-07, Duke Energy - McGuire Nuclear Station Memo - Canister Contents Weight For MAG-TSC-418-099, Revision 0. This document provides supporting information for RAI 1.c and contains information propriety to NAC International.

NAC International requests that the proprietary information on the DVD be withheld from public disclosure in accordance with 10 CFR 2.390. An affidavit supporting the basis for withholding is enclosed.

This letter and its enclosures do not contain any regulatory commitments. Should you have any questions, please contact Jeff Thomas, Nuclear Licensing Consultant, at (980) 875-4499.

s~~P Thomas D. Ray, P.E.

Site Vice President McGuire Nuclear Station

Enclosures:

1. Digital Versatile Disk (DVD) (Propriety Information)

2. NAC International Affidavit www.duke-enerqy.com PROPRIETARY INFORMATION-WITHHOLD UNDER 10 CFR 2.390 UPON REMOVAL OF THE ENCLOSED DIGITAL VERSATILE DISC (DVD) THIS LETTER IS UNCONTROLLED

PROPRIETARY INFORMATION-WITHHOLD UNDER 10 CFR 2.390 UPON REMOVAL OF ENCLOSURES 1-3 THIS LETTER IS UNCONTROLLED U.S. Nuclear Regulatory Commission Document Control Desk Serial: RA-20-0037 Page 3 cc: w/Enclosures John McKirgan, Chief Spent Fuel Licensing Branch Division of Spent Fuel Management Office of Nuclear Material Safety and Safeguards U.S. Nuclear Regulatory Commission Laura A. Dudes, Regional Administrator U.S. Nuclear Regulatory Commission Marquis One Tower 245 Peachtree Center Avenue, NE Suite 1200 Atlanta, Georgia 30303-1257 Andy Hutto, Senior Resident Inspector U.S. Nuclear Regulatory Commission McGuire Nuclear Station Michael Mahoney, Project Manager U.S. Nuclear Regulatory Commission 11555 Rockville Pike Mail stop 0-8B 1A Rockville, MD 20852 W.L. Cox, Ill Section Chief, North Carolina Department of Health and Human Services Division of Health Service Regulation Radiation Protection Section 1645 Mail Service Center Raleigh, NC 27699-1645 www.duke-enerqy.com PROPRIETARY INFORMATION - WITHHOLD UNDER 10 CFR 2.390 UPON REMOVAL OF THE ENCLOSED DIGITAL VERSATILE DISC (DVD) THIS LETTER IS UNCONTROLLED

PROPRIETARY INFORMATION -WITHHOLD UNDER 10 CFR 2.390 UPON REMOVAL OF THE ENCLOSED DIGITAL VERSATILE DISC (DVD) THIS LETTER IS UNCONTROLLED

Enclosure:

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