ML24040A029

Enclosure NAC International, List of Changes for Final Safety Analysis Report, Revision 24A

ML24040A029
Person / Time
Site:	07201025
Issue date:	01/31/2024
From:	NAC International
To:	Office of Nuclear Material Safety and Safeguards, Document Control Desk
Shared Package
ML24040A027	List: ML24040A029 ML24045A269
References
ED20240024, CAC 001028, EPID L-2023-LLA-0149, EPID L-2023-LLA-0148
Download: ML24040A029 (1)

Text

January2024

Rev i s i o n24A NACMPC NAC Multi PurposeCask FINAL SAFETY ANALYSIS REPORT

Non-Proprietary Version

DocketNo. 72 1025

AtlantaCorporateHeadquarters:3930EastJonesBridge Road,Norcross,Georgia30092USA Phone7704471144,Fax 7704471797,www.nacintl.com to ED20240024 Page 1 of 2

Enclosure 1

List of Changes

for

NAC-MPC FSAR, Revision 24A (Docket No 72-1025)

NAC International

January 2024 to ED20240024 Page 2 of 2

List of Changes for the NAC-MPC FSAR, Revision 24A

Chapter/Page/ Description of Change Figure/Table Note: The List of Effective Pages and the Chapter Table of Contents, List of Figures, and List of Tables have been revised accordingly to reflect the list of changes detailed below.

Chapter 1 - no changes

Chapter 2 - no changes

Chapter 3 - no changes

Chapter 4 - no changes

Chapter 5 Page 5.A.1-3 Added paragraph, where indicated Page 5.A.1-4 Added paragraph, where indicated Page 5.A.1-6 Added footnote, where indicated Page 5.A.3-15 Added footnote, where indicated Page 5.A.4-2 Added 3 paragraphs to the end of Section 5.A.4.3.1 Page 5.A.4-3 Added 1 paragraphs to the end of Section 5.A.4.3.2 Page 5.A.4-4 thru 5.A.4-5 Text flow changes Page 5.A.4-22 Added Figure 5.A.4-32 Page 5.A.4-23 Added Table 5.A.4-3 and Table 5.A.4-4 Page 5.A.5-1 Added Reference [A12]

Chapter 6 - no changes

Chapter 7 - no changes Chapter 8 - no changes

Chapter 9 - no changes Chapter 10 - no changes

Chapter 11 - no changes

Chapter 12 - no changes Chapter 13 - no changes Chapter 14 - no changes to ED20240024 Page 1 of 2

Enclosure 2

Supporting Calculation(s)

for

NAC-MPC FSAR, Revision 24A (Docket No 72-1025)

NAC International

January 2024 to ED20240024 Page 2 of 2

Contents

1. 63004500-5013, REV. 0

CALCULATIONS WITHHELD IN THEIR ENTIRETY PER 10 CFR 2.390 to ED20240024

Enclosure 3

Change Pages

for the

NAC-MPC FSAR (Docket No 72-1025)

Revision 24A

NAC International

January 2024 January2024

Rev i s i o n24A NACMPC NAC Multi PurposeCask FINAL SAFETY ANALYSIS REPORT

Non-Proprietary Version

DocketNo. 72 1025

AtlantaCorporateHeadquarters:3930EastJonesBridge Road,Norcross,Georgia30092USA Phone7704471144,Fax 7704471797,www.nacintl.com NAC-MPC FSAR January 2024 Docket No. 72-1025 Revision 24A List of Effective Pages

Chapter 1 1.5-32 thru 1.5-34....................... Revision 2 1-i............................................... Revision 13 1.5-35.......................................... Revision 7 1-ii................................................ Revision 8 1.5-36 thru 1.5-40....................... Revision 2 1-iii............................................... Revision 5 1.5-41........................................ Revision 13 1-iv............................................... Revision 9 1.5-42 thru 1.5-43....................... Revision 9 1-1................................................ Revision 3 1.5-44 thru 1.5-48....................... Revision 2 1-2 thru 1-8.................................. Revision 8 1.5-49.......................................... Revision 7 1.1-1........................................... Revision 13 1.5-50 thru 1.5-53....................... Revision 2 1.1-2............................................. Revision 8 1.5-54........................................ Revision 13 1.1-3 thru 1.1-5............................ Revision 2 1.5-55 thru 1.5-59....................... Revision 2 1.1-6............................................. Revision 0 1.6-1.......................................... Revision 13 1.1-7............................................. Revision 2 1.7-1.......................................... Revision 13 1.2-1 thru 1.2-12........................ Revision 13 1.7-2............................................ Revision 3 1.2-13 thru 1.2-19........................ Revision 3 1.7-3............................................ Revision 9 1.2-20 thru 1.2-21...................... Revision 13 1.2-22........................................... Revision 9 61 drawings (see Chapter 1) 1.2-23........................................... Revision 3 1.3-1 thru 1.3-4............................ Revision 8 Appendix 1.A 1.3-5 thru 1.3-6............................ Revision 5 1.3-7 thru 1.3-10.......................... Revision 3 1.A-i............................................ Revision 8 1.3-11........................................... Revision 5 1.A-ii........................................... Revision 9 1.3-12 thru 1.3-14........................ Revision 3 1.A-1 thru 1.A-5.......................... Revision 8 1.4-1 thru 1.4-3............................ Revision 2 1.A.1-1...................................... Revision 13 1.5-1............................................. Revision 2 1.A.1-2 thru 1.A.1-3.................... Revision 8 1.5-2........................................... Revision 11 1.A.1-4...................................... Revision 13 1.5-3 thru 1.5-5............................ Revision 2 1.A.1-5 thru 1.A.1-6.................... Revision 8 1.5-6........................................... Revision 11 1.A.2-1 thru 1.A.2-3.................. Revision 13 1.5-7 thru 1.5-9............................ Revision 2 1.A.2-4........................................ Revision 8 1.5-10 thru 1.5-11........................ Revision 7 1.A.2-5........................................ Revision 9 1.5-12 thru 1.5-17........................ Revision 2 1.A.2-6 thru 1.A.2-8.................... Revision 8 1.5-18......................................... Revision 13 1.A.2-9...................................... Revision 13 1.5-19 thru 1.5-22........................ Revision 2 1.A.2-10...................................... Revision 8 1.5-23......................................... Revision 13 1.A.2-11.................................... Revision 13 1.5-24 thru 1.5-30........................ Revision 2 1.A.2-12 thru 1.A.2-17................ Revision 8 1.5-31........................................... Revision 7 1.A.2-18...................................... Revision 9

Page 1 of 9 NAC-MPC FSAR January 2024 Docket No. 72-1025 Revision 24A List of Effective Pages (continued)

1.A.2-19 thru 1.A.2-20............... Revision 13 2.2-1 thru 2.2-2........................... Revision 2 1.A.2-21 thru 1.A.2-22................. Revision 9 2.2-3 thru 2.2-4........................... Revision 0 1.A.3-1 thru 1.A.3-5..................... Revision 8 2.2-5 thru 2.2-7........................... Revision 2 1.A.4-1 thru 1.A.4-2..................... Revision 8 2.2-8............................................ Revision 0 1.A.5-1.......................................... Revision 8 2.2-9 thru 2.2-11......................... Revision 2 1.A.5-2........................................ Revision 11 2.3-1 thru 2.3.2......................... Revision 11 1.A.5-3 thru 1.A.5-5..................... Revision 8 2.3-3 thru 2.3-4......................... Revision 13 1.A.5-6........................................ Revision 11 2.3-5............................................ Revision 0 1.A.5-7 thru 1.A.5-17................... Revision 8 2.3-6............................................ Revision 3 1.A.5-18...................................... Revision 13 2.3-7............................................ Revision 2 1.A.5-19 thru 1.A.5-22................. Revision 8 2.3-8............................................ Revision 0 1.A.5-23...................................... Revision 13 2.3-9 thru 2.3-22....................... Revision 13 1.A.5-24 thru 1.A.5-28................. Revision 8 2.4-1 thru 2.4-2........................... Revision 2 1.A.5-29...................................... Revision 13 2.4-3............................................ Revision 0 1.A.5-30 thru 1.A.5-40................. Revision 8 2.4-4............................................ Revision 2 1.A.5-41...................................... Revision 13 1.A.5-42........................................ Revision 8 Appendix 2.A 1.A.5-43........................................ Revision 9 1.A.5-44 thru 1.A.5-48................. Revision 8 2.A.i thru 2.A.ii........................... Revision 8 1.A.5-49........................................ Revision 9 2.A.iii........................................ Revision 11 1.A.5-50 thru 1.A.5-53................. Revision 8 2.A-1 thru 2.A-3....................... Revision 13 1.A.5-54...................................... Revision 13 2.A.1-1 thru 2.A.1-5................... Revision 8 1.A.5-55 thru 1.A.5-60................. Revision 8 2.A.2-1 thru 2.A.2-2................... Revision 8 1.A.6-1........................................ Revision 13 2.A.3-1...................................... Revision 11 1.A.7-1........................................ Revision 12 2.A.3-2 thru 2.A.3-5................. Revision 13 2.A.3-6 thru 2.A.3-7................... Revision 8 17 MPC-LACBWR drawings 2.A.3-8...................................... Revision 11 (see Appendix 1.A) 2.A.4-1 thru 2.A.4-3................... Revision 8

Chapter 3 Chapter 2 3-i................................................ Revision 8 2-i thru 2-ii.................................... Revision 8 3-ii............................................. Revision 10 2-iii............................................. Revision 13 3-iii............................................. Revision 3 2-1 thru 2-5................................. Revision 13 3-iv.............................................. Revision 5 2.1-1 thru 2.1-11........................... Revision 8 3-v thru 3-vii............................... Revision 3 2.1-12 thru 2.1-20......................... Revision 3 3.1-1 thru 3.1-8........................... Revision 8

Page 2 of 9 NAC-MPC FSAR January 2024 Docket No. 72-1025 Revision 24A List of Effective Pages (continued)

3.1.9.............................................. Revision 3 3.7-2............................................ Revision 9 3.2-1 thru 3.2-3............................ Revision 2 3.8-1............................................ Revision 3 3.3-1 thru 3.3-9............................ Revision 2 3.8.1-1 thru 3.8.1-4..................... Revision 0 3.3-10...................................... Amendment 1 3.8.2-1 thru 3.8.2-4..................... Revision 0 3.3-11........................................... Revision 0 3.8.3-1 thru 3.8.3-2..................... Revision 2 3.3-12 thru 3.3-14........................ Revision 2 3.8.4-1 thru 3.8.4-2..................... Revision 2 3.4.1-1.......................................... Revision 8 3.8.5-1 thru 3.8.5-2..................... Revision 9 3.4.1-2.......................................... Revision 7 3.8.6-1 thru 3.8.6-2..................... Revision 9 3.4.1-3 thru 3.4.1-4...................... Revision 2 3.8.7-1 thru 3.8.7-2................... Revision 10 3.4.1-5.......................................... Revision 3 3.4.1-6.......................................... Revision 2 Appendix 3.A 3.4.1-7........................................ Revision 10 3.A-i thru 3.A.ii........................... Revision 8 3.4.2-1 thru 3.4.2-2...................... Revision 2 3.A.iii........................................ Revision 12 3.4.3-1 thru 3.4.3-39.................... Revision 2 3.A-1........................................... Revision 8 3.4.3-40........................................ Revision 3 3.A.1-1 thru 3.A.1-3.................... Revision 8 3.4.3-41 thru 3.4.3-47.................. Revision 2 3.A.2-1........................................ Revision 8 3.4.3-48........................................ Revision 4 3.A.2-2........................................ Revision 9 3.4.3-49 thru 3.4.3-55.................. Revision 2 3.A.3-1........................................ Revision 8 3.4.3-56........................................ Revision 3 3.A.4-1 thru 3.A.4-8.................... Revision 8 3.4.3-57 thru 3.4.3-71.................. Revision 2 3.A.4-9........................................ Revision 9 3.4.3-72 thru 3.4.3-73.................. Revision 5 3.A.4-10 thru 3.A.4-33................ Revision 8 3.4.4-1 thru 3.4.4-9...................... Revision 2 3.A.4-34 thru 3.A.4-36.............. Revision 12 3.4.4-10........................................ Revision 3 3.A.5-1........................................ Revision 8 3.4.4-11 thru 3.4.4-14.................. Revision 2 3.A.6-1 thru 3.A.6-2.................... Revision 8 3.4.4-15 thru 3.4.4-53.................. Revision 3 3.A.7-1........................................ Revision 8 3.4.4-54 thru 3.4.4-56.................. Revision 4 3.A.8-1........................................ Revision 8 3.4.4-57........................................ Revision 5 3.4.4-58 thru 3.4.4-69.................. Revision 3 3.4.4-70 thru 3.4.4-76.................. Revision 4 Chapter 4 3.4.4-77 thru 3.4.4-98.................. Revision 3 4-i................................................ Revision 3 3.4.4-99 thru 3.4.4-101................ Revision 5 4-ii............................................... Revision 8 3.4.5-1.......................................... Revision 2 4-iii.............................................. Revision 3 3.5-1............................................. Revision 2 4-iv.............................................. Revision 5 3.6-1 thru 3.6-2............................ Revision 2 4-v............................................... Revision 2 3.6-3............................................. Revision 4 4-vi.............................................. Revision 5 3.7-1............................................. Revision 2

Page 3 of 9 NAC-MPC FSAR January 2024 Docket No. 72-1025 Revision 24A List of Effective Pages (continued)

4.1-1............................................ Revision 13 4.5-2 thru 4.5-6........................... Revision 2 4.1-2.............................................. Revision 8 4.5-7............................................ Revision 3 4.1-3.............................................. Revision 2 4.5-8 thru 4.5-15......................... Revision 2 4.1-4.............................................. Revision 5 4.5-16.......................................... Revision 5 4.1-5.............................................. Revision 9 4.5-17 thru 4.5-21....................... Revision 2 4.1-6.............................................. Revision 2 4.5-22.......................................... Revision 5 4.1-7.............................................. Revision 5 4.5-23.......................................... Revision 2 4.2-1.............................................. Revision 2 4.5-24.......................................... Revision 5 4.2-2............................................ Revision 13 4.5-25 thru 4.5-26....................... Revision 2 4.2-3.............................................. Revision 0 4.5-27.......................................... Revision 5 4.2-4 thru 4.2-5............................. Revision 2 4.5-28.......................................... Revision 2 4.2-6 thru 4.2-12........................... Revision 0 4.5-29 thru 4.5-34....................... Revision 5 4.3-1.............................................. Revision 2 4.5-35 thru 4.5-37....................... Revision 2 4.4-1 thru 4.4-3............................. Revision 2 4.5-38.......................................... Revision 5 4.4-4.............................................. Revision 0 4.5-39 thru 4.5-41....................... Revision 2 4.4-5.............................................. Revision 2 4.5-42 thru 4.5-47....................... Revision 5 4.4-6.............................................. Revision 0 4.5-48 thru 4.5-51....................... Revision 2 4.4-7........................................ Amendment 1 4.5-52.......................................... Revision 5 4.4-8 thru 4.4-9............................. Revision 2 4.6-1 thru 4.6-2........................... Revision 2 4.4-10............................................ Revision 0 4.6-3............................................ Revision 5 4.4-11 thru 4.4-13......................... Revision 2 4.4-14 thru 4.4-16......................... Revision 0 Appendix 4.A 4.4-17 thru 4.4-19......................... Revision 2 4.A-i.......................................... Revision 12 4.4-20............................................ Revision 0 4.A-ii thru 4-A-iii....................... Revision 8 4.4-21 thru 4.4-22......................... Revision 2 4.A.1-1...................................... Revision 12 4.4-23...................................... Amendment 1 4.A.2-1........................................ Revision 8 4.4-24 thru 4.4-25......................... Revision 2 4.A.3-1 thru 4.A.3-34................. Revision 8 4.4-26 thru 4.4-27......................... Revision 0 4.A.3-35.................................... Revision 12 4.4-28 thru 4.4-29......................... Revision 2 4.A.4-1 thru 4.A.4-2................. Revision 12 4.4-30............................................ Revision 0 4.A.5-1...................................... Revision 12 4.4-31 thru 4.4-35......................... Revision 2 4.4-36 thru 4.4-38................... Amendment 1 Chapter 5 4.4-39 thru 4.4-54......................... Revision 2 5-i thru 5-ii.................................. Revision 8 4.4-55...................................... Amendment 1 5-iii thru 5-xii............................. Revision 3 4.4-56 thru 4.4-61......................... Revision 3 5.1-1 thru 5.1-2......................... Revision 13 4.5-1.............................................. Revision 5

Page 4 of 9 NAC-MPC FSAR January 2024 Docket No. 72-1025 Revision 24A List of Effective Pages (continued)

5.1.1-1 thru 5.1.1-6...................... Revision 3 5.A.4-2 thru 5.A.4-5............... Revision 24A 5.1.2-1 thru 5.1.2-4...................... Revision 2 5.A.4-6 thru 5.A.4-21.................. Revision 8 5.1.2-5 thru 5.1.2-6...................... Revision 3 5.A.4-22 thru 5.A.4-23........... Revision 24A 5.2-1............................................. Revision 2 5.A.5-1................................... Revision 24A 5.2.1-1 thru 5.2.1-17.................... Revision 3 5.A.6-1 thru 5.A.6-72.................. Revision 8 5.2.2-1.......................................... Revision 3 5.2.2-2 thru 5.2.2-19.................... Revision 2 Chapter 6 5.3-1............................................. Revision 3 6-i thru 6-ii.................................. Revision 8 5.3.1-1 thru 5.3.1-26.................... Revision 3 6-iii thru 6-vi............................... Revision 3 5.3.2-1 thru 5.3.2-2...................... Revision 2 6.1-1............................................ Revision 2 5.3.2-3.......................................... Revision 3 6.1-2............................................ Revision 8 5.3.2-4 thru 5.3.2-16.................... Revision 2 6.1.1-1 thru 6.1.1-2..................... Revision 8 5.4-1............................................. Revision 2 6.1.2-1 thru 6.1.2-2..................... Revision 2 5.4.1-1 thru 5.4.1-34.................... Revision 3 6.2-1............................................ Revision 2 5.4.2-1 thru 5.4.2-47.................... Revision 2 6.2.1-1 thru 6.2.1-2..................... Revision 3 5.5-1............................................. Revision 2 6.2.1-3 thru 6.2.1-5..................... Revision 2 5.5-2............................................. Revision 3 6.2.1-6......................................... Revision 3 5.6.1-1 thru 5.6.1-71.................... Revision 3 6.2.1-7......................................... Revision 2 5.6.2-1 thru 5.6.2-36.................... Revision 3 6.2.2-1......................................... Revision 3 6.2.2-2 thru 6.2.2-4..................... Revision 2 Appendix 5.A 6.3-1............................................ Revision 2 5.A-i thru 5.A-iii.......................... Revision 8 6.3.1-1......................................... Revision 2 5.A-iv...................................... Revision 24A 6.3.1-2......................................... Revision 3 5.A-v............................................ Revision 8 6.3.1-3 thru 6.3.1-9..................... Revision 2 5.A-vi...................................... Revision 24A 6.3.1-10....................................... Revision 3 5.A-1............................................ Revision 8 6.3.2-1......................................... Revision 3 5.A.1-1 thru 5.A.1-2..................... Revision 8 6.3.2-2 thru 6.3.2-7..................... Revision 2 5.A.1-3 thru 5.A.1-4............... Revision 24A 6.4-1............................................ Revision 2 5.A.1-5......................................... Revision 8 6.4.1-1 thru 6.4.1-33................... Revision 3 5.A.1-6.................................... Revision 24A 6.4.2-1 thru 6.4.2-6..................... Revision 2 5.A.1-7 thru 5.A.1-8..................... Revision 8 6.4.2-7......................................... Revision 5 5.A.2-1 thru 5.A.2-17................... Revision 8 6.4.2-8 thru 6.4.2-12................... Revision 2 5.A.3-1 thru 5.A.3-14................... Revision 8 6.4.2-13 thru 6.4.2-17................. Revision 3 5.A.3-15.................................. Revision 24A 6.4.2-18 thru 6.4.2-21................. Revision 2 5.A.4-1......................................... Revision 8 6.4.2-22 thru 6.4.2-23................. Revision 3 6.4.2-24 thru 6.4.2-26................. Revision 2

Page 5 of 9 NAC-MPC FSAR January 2024 Docket No. 72-1025 Revision 24A List of Effective Pages (continued)

6.5-1 thru 6.5-2............................. Revision 2 7.1-8 thru 7.1-10......................... Revision 2 6.5.1-1........................................... Revision 2 7.2-1............................................ Revision 3 6.5.1-2 thru 6.5.1-3....................... Revision 3 7.2-2............................................ Revision 7 6.5.1-4 thru 6.5.1-19..................... Revision 2 7.3-1............................................ Revision 2 6.5.1-20......................................... Revision 3 6.5.2-1........................................... Revision 3 Appendix 7.A 6.5.2-2 thru 6.5.2-20..................... Revision 2 7.A-i thru 7.A-ii.......................... Revision 8 6.6-1 thru 6.6-2............................. Revision 2 7.A-1........................................... Revision 8 6.7-1.............................................. Revision 3 7.A.1-1 thru 7.A.1-3................. Revision 13 6.7.1-1 thru 6.7.1-126................... Revision 2 7.A.1-4 thru 7.A.1-6................... Revision 8 6.7.1-127 thru 6.7.1-160............... Revision 3 7.A.2-1 thru 7.A.2-2................... Revision 8 6.7.2-1 thru 6.7.2-44..................... Revision 2 7.A.3-1........................................ Revision 8

Appendix 6.A 7.A.4-1........................................ Revision 8

6.A-i thru 6.A-iv........................... Revision 8 Chapter 8 6.A-1............................................. Revision 8 8-i................................................ Revision 8 6.A.1-1........................................ Revision 13 8-ii............................................... Revision 5 6.A.1-2 thru 6.A.1-4..................... Revision 8 8-1............................................. Revision 13 6.A.1-5..................................... Revision 19A 8-2............................................... Revision 2 6.A.1-6.......................................... Revision 8 8.1-1 thru 8.1-2........................... Revision 2 6.A.2-1 thru 6.A.2-2..................... Revision 8 8.1-3 thru 8.1-4........................... Revision 7 6.A.3-1 thru 6.A.3-19................... Revision 8 8.1-5.......................................... Revision 13 6.A.4-1 thru 6.A.4-28................... Revision 8 8.1-6 thru 8.1-9........................... Revision 7 6.A.5-1 thru 6.A.5-34................... Revision 8 8.1-10.......................................... Revision 6 6.A.6-1......................................... Revision 8 8.1-11........................................ Revision 13 6.A.7-1 thru 6.A.7-43................... Revision 8 8.1-12 thru 8.1-13....................... Revision 6 8.1-14.......................................... Revision 7 Chapter 7 8.1-15.......................................... Revision 6 7-i.................................................. Revision 8 8.1-16.......................................... Revision 5 7-ii................................................. Revision 2 8.1-17.......................................... Revision 7 7-1................................................. Revision 8 8.1-18 thru 8.1-19....................... Revision 5 7.1-1.............................................. Revision 3 8.2-1............................................ Revision 7 7.1-2 thru 7.1-4........................... Revision 13 8.2-2............................................ Revision 2 7.1-5.............................................. Revision 2 8.3-1............................................ Revision 2 7.1-6 thru 7.1-7........................... Revision 13 8.3-2 thru 8.3-5........................... Revision 3

Page 6 of 9 NAC-MPC FSAR January 2024 Docket No. 72-1025 Revision 24A List of Effective Pages (continued)

Appendix 8.A 10.1-1 thru 10.1-2....................... Revision 8 8.A-i thru 8.A-ii........................... Revision 8 10.2-1........................................ Revision 13 8.A-1 thru 8.A-2........................... Revision 8 10.2-2.......................................... Revision 3 8.A.1-1 thru 8.A.1-6..................... Revision 8 10.3-1.......................................... Revision 2 8.A.1-7....................................... Revision 13 10.3-2.......................................... Revision 7 8.A.1-8......................................... Revision 9 10.3-3.......................................... Revision 2 8.A.1-9 thru 8.A.1-14................... Revision 8 10.3-4.......................................... Revision 3 8.A.2-1......................................... Revision 8 10.3-5 thru 10.3-10..................... Revision 2 8.A.3-1 thru 8.A.3-3..................... Revision 8 10.3-11........................................ Revision 3 10.3-12 thru 10.3-14................... Revision 2 Chapter 9 10.4-1 thru 10.4-4....................... Revision 3 9-i................................................. Revision 8 10.4-5.......................................... Revision 2 9-1.............................................. Revision 13 10.4-6.......................................... Revision 3 9.1-1........................................... Revision 13 10.4-7 thru 10.4-11..................... Revision 2

9.1-2 thru 9.1-4............................ Revision 3 Appendix 10.A 9.1-5............................................. Revision 7 9.1-6............................................. Revision 9 10.A-i thru 10.A-ii...................... Revision 8 9.1-7............................................. Revision 8 10A-1.......................................... Revision 8 9.1-8............................................. Revision 7 10.A.1-1 thru 10.A.1-2............. Revision 8A 9.1-9 thru 9.1-10.......................... Revision 9 10.A.2-1 thru 10.A.2-2............. Revision 8A 9.2-1........................................... Revision 13 10.A.3-1 thru 10.A.3-5................ Revision 8 9.3-1............................................. Revision 2 10.A.4-1 thru 10.A.4-8................ Revision 8 10.A.5-1...................................... Revision 8 Appendix 9.A 9.A-i............................................. Revision 8 Chapter 11 9.A-1............................................ Revision 8 11-i.............................................. Revision 7 9.A.1-1 thru 9.A.1-3..................... Revision 8 11-ii thru11-iii............................. Revision 2 9.A.2-1 thru 9.A.2-3..................... Revision 9 11-iv............................................ Revision 3 9.A.2-4 thru 9.A.2-6..................... Revision 8 11-v............................................. Revision 8 9.A.3-1 thru 9.A.3-3................... Revision 13 11-vi thru 11-vii.......................... Revision 3 9.A.4-1......................................... Revision 8 11-viii.......................................... Revision 4 11-ix thru 11-xi........................... Revision 3 Chapter 10 11-1............................................. Revision 8 10-i............................................... Revision 8 11.1-1.......................................... Revision 8 10-ii thru 10-iii............................. Revision 2 11.1.1-1....................................... Revision 7

Page 7 of 9 NAC-MPC FSAR January 2024 Docket No. 72-1025 Revision 24A List of Effective Pages (continued)

11.1.1-2......................................... Revision 3 11.2.11-11................................... Revision 2 11.1.2-1......................................... Revision 2 11.2.12-1 thru 11.2.12-6............. Revision 2 11.1.2-2......................................... Revision 3 11.2.12-7 thru 11.2.12-15........... Revision 3 11.1.2-3......................................... Revision 2 11.2.12-16 thru 11.2.12-25......... Revision 2 11.1.2-4......................................... Revision 4 11.2.12-26................................... Revision 3 11.1.2-5......................................... Revision 2 11.2.12-27 thru 11.2.12-30......... Revision 2 11.1.2-6 thru 11.1.2-7................... Revision 4 11.2.12-31 thru 11.2.12-59......... Revision 3 11.1.3-1 thru 11.1.3-2................... Revision 7 11.2.12-60 thru 11.2.12-61......... Revision 4 11.1.4-1......................................... Revision 7 11.2.12-62 thru 11.2.12-69......... Revision 3 11.1.4-2 thru 11.1.4-7................... Revision 2 11.2.12-70 thru 11.2.12-73......... Revision 4 11.1.5-1 thru 11.1.5-7................... Revision 2 11.2.12-74 thru 11.2.12-89......... Revision 3 11.2-1............................................ Revision 8 11.2.13-1 thru 11.2.13-23........... Revision 2 11.2.1-1......................................... Revision 3 11.2.13-24................................... Revision 3 11.2.1-2 thru 11.2.1-3................... Revision 2 11.2.13-25................................... Revision 2 11.2.1-4......................................... Revision 4 11.3-1.......................................... Revision 8 11.2.1-5 thru 11.2.1-8................... Revision 2 11.3-2.......................................... Revision 2 11.2.1-9 thru 11.2.1-10................. Revision 4 11.3-3.......................................... Revision 0 11.2.2-1 thru 11.2.2-14................. Revision 2 11.3-4 thru 11.3-5....................... Revision 2 11.2.2-15..................................... Revision 12 11.3-6 thru 11.3-8....................... Revision 0 11.2.3-1......................................... Revision 2 11.3-9.......................................... Revision 2 11.2.3-2....................................... Revision 12 11.3-10 thru 11.3-15................... Revision 0 11.2.4-1......................................... Revision 2 11.3-16 thru 11.3-17................... Revision 2 11.2.5-1 thru 11.2.5-5................... Revision 2 11.3-18 thru 11.3-20................... Revision 0 11.2.6-1 thru 11.2.6-7................... Revision 2 11.3-21 thru 11.3-22................... Revision 2 11.2.6-8......................................... Revision 4 11.3-23........................................ Revision 0 11.2.6-9....................................... Revision 12 11.3-24 thru 11.3-34.............. Amendment 1 11.2.7-1 thru 11.2.7-2................... Revision 2 11.3-35........................................ Revision 3 11.2.8-1 thru 11.2.8-2................... Revision 2 11.3-36 thru 11.3-41.............. Amendment 1 11.2.8-3......................................... Revision 3 11.3-42 thru 11.3-46................... Revision 3 11.2.9-1 thru 11.2.9-5................... Revision 2 11.4-1.......................................... Revision 8 11.2.10-1....................................... Revision 7 11.4.1-1 thru 11.4.1-20............... Revision 2 11.2.10-2 thru 11.2.10-3............... Revision 2 11.4.2-1 thru 11.4.2-3................. Revision 2 11.2.11-1 thru 11.2.11-5............... Revision 2 11.4.2-4 thru 11.4.2-6................. Revision 3 11.2.11-6 thru 11.2.11-8............... Revision 4 11.4.2-7 thru 11.4.2-10............... Revision 2 11.2.11-9....................................... Revision 2 11.4.3-1....................................... Revision 3 11.2.11-10..................................... Revision 4 11.4.3-2 thru 11.4.3-4................. Revision 2

Page 8 of 9 NAC-MPC FSAR January 2024 Docket No. 72-1025 Revision 24A List of Effective Pages (continued)

11.4.4-1 thru 11.4.4-3.................. Revision 2 12.C.3-4....................................... Revision 8 11.4.5-1 thru 11.4.5-12................ Revision 2 12.C.3-5 thru 12.C.3-8................ Revision 2 11.5-1........................................... Revision 2 12.C.3-9 thru 12.C.3-20.............. Revision 8 11.5-2 thru 11.5-3........................ Revision 4 12.C.3-21..................................... Revision 5 11.6-1........................................... Revision 0 12.C.3-22 thru 12.C.3-23............ Revision 8 11.6-2........................................... Revision 2 12.C.3-24..................................... Revision 5 11.6-3...................................... Amendment 1 12.C.3-25 thru 12.C.3-26............ Revision 8 11.6-4........................................... Revision 2 12.C.3-27..................................... Revision 9 12.C.3-28 thru 12.C.3-29............ Revision 8 Appendix 11.A 12.C.3-30 thru 12.C.3-31.......... Revision 12 11.A-i......................................... Revision 12 12.C.3-32 thru 12.C.3-33............ Revision 8 11.A-ii thru 11.A-iv................... Revision 10 12.C.3-34 thru 12.C.3-35............ Revision 5 11.A-1.......................................... Revision 8 12.C.3-36..................................... Revision 8 11.A.1-1 thru 11.A.1-8................. Revision 8 12.C.3-37..................................... Revision 5 11.A.1-9..................................... Revision 12 12.C.3-38 thru 12.C.3-40............ Revision 8 11.A.1-10 thru 11.A.1-15............. Revision 8 12.C.3-41..................................... Revision 5 11.A.2-1 thru 11.A.2-6................. Revision 8 12.C.3-42..................................... Revision 8 11.A.2-7 thru 11.A.2-56............. Revision 10 12.C.3-43................................... Revision 12 11.A.3-1....................................... Revision 8 Chapter 13 11.A.4-1 thru 11.A.4-7................. Revision 8 11.A.5-1 thru 11.A.5-2................. Revision 8 13-i.............................................. Revision 8 11.A.6-1..................................... Revision 10 13.1-1 thru 13.1-2....................... Revision 8 13.2-1 thru 13.2-9....................... Revision 8 Chapter 12 13.3-1.......................................... Revision 8 12-i thru 12-ii............................... Revision 2 12-1 thru 12-2.............................. Revision 8 Chapter 14 12.A-1.......................................... Revision 2 14-i thru 14-ii............................ Revision 13 12.A-2.......................................... Revision 8 14.1-1........................................ Revision 13 12.B-1........................................... Revision 2 14.2-1 thru 14.2-5..................... Revision 13 12.B-2........................................... Revision 8 14.3-1 thru 14.3-26................... Revision 13 12.C-1 thru 12.C-2....................... Revision 2 14.4-1 thru 14.4-2..................... Revision 13 12.C.1-1........................................ Revision 8 14.5-1 thru 14.5-3..................... Revision 13 12.C.2-1 thru 12.C.2-3................. Revision 8 14.6-1 thru 14.6-2..................... Revision 13 12.C.3-1........................................ Revision 8 12.C.3-2 thru 12.C.3-3................. Revision 2

Page 9 of 9 NAC-MPC FSAR January 2024 Docket No. 72-1025 Revision 24A

List of Figures (continued)

Figure 5.A.4-24 Dose Rate Profile Comparison at Top Axial Surface of Transfer Cask

- Active Fuel Damaged Fuel.................................................................. 5.A.4-17 Figure 5.A.4-25 Dose Rate Profile Comparison at Bottom Axial Surface of Transfer Cask - Active Fuel Damaged Fuel......................................................... 5.A.4-18 Figure 5.A.4-26 Dose Rate Profile at Radial Surface of Transfer Cask - Lower End Fitting Damaged Fuel............................................................................. 5.A.4-19 Figure 5.A.4-27 Dose Rate Profile at Bottom Axial Surface of Transfer Cask - Lower End Fitting Damaged Fuel..................................................................... 5.A.4-19 Figure 5.A.4-28 Canister Flood Study - Transfer Cask Radial Surface Dose Rate Profile

................................................................................................................ 5.A.4-20 Figure 5.A.4-29 Canister Flood Study - Transfer Cask Radial Surface Dose Rate Profile

................................................................................................................ 5.A.4-20 Figure 5.A.4-30 Transfer Cask Radial Dose Rates-Fresh Fuel versus Spent Fuel Isotopics.................................................................................................. 5.A.4-21 Figure 5.A.4-31 Concrete Cask Radial Dose Rates-Fresh Fuel versus Spent Fuel Isotopics.................................................................................................. 5.A.4-21 Figure 5.A.4-32 Concrete Cask Top Surface Dose Rate Comparison for 145 and 140 lb/ft3 Lid Concrete Density..................................................................... 5.A.4-22 Figure 5.A.6-1 MPC-LACBWR SAS2H Input File for Allis Chalmers Fuel.................. 5.A.6-2 Figure 5.A.6-2 MPC-LACBWR SAS2H Input File for Exxon Nuclear Company Fuel.. 5.A.6-4 Figure 5.A.6-3 MPC-LACBWR MCNP Input File for Storage Cask Radial Biasing -

Fuel Gamma Source................................................................................. 5.A.6-6 Figure 5.A.6-4 MPC-LACBWR MCNP Input File for Transfer Cask Wet Canister Top Axial Biasing - Fuel Neutron Source..................................................... 5.A.6-22 Figure 5.A.6-5 MPC-LACBWR MCNP Input File for Transfer Cask Dry Canister Bottom Axial Biasing - Lower End Fitting Source............................... 5.A.6-35 Figure 5.A.6-6 MPC-LACBWR MCNP Input File for Storage Cask Inlet Biasing -

Lower End Fitting Damaged Fuel Gamma Source................................ 5.A.6-46 Figure 5.A.6-7 MPC-LACBWR MCNP Input File for Transfer Cask Dry Canister Bottom Axial Biasing - Lower End Fitting Damaged Fuel Neutron Source..................................................................................................... 5.A.6-62

5.A-iv NAC-MPC FSAR January 2024 Docket No. 72-1025 Revision 24A

List of Tables (continued)

Table 5.A.4-3 Storage Cask Top Maximum Dose Rate Comparison at Lid Concrete Density of 140 lb/ft3............................................................................... 5.A.4-23 Table 5.A.4-4 Storage Cask Top Average Dose Rate Comparison at Lid Concrete Density of 140 lb/ft3............................................................................... 5.A.4-23

5.A-vi NAC-MPC FSAR January 2024 Docket No. 72-1025 Revision 24A

gamma, fuel n-gamma, and activated hardware gamma. Dose rate evaluations include the effect of axial fuel burnup peaking on fuel neutron and gamma source terms.

The resulting dose rate profiles, along with the maximum and average radial and axial dose rates are presented for the storage cask and transfer cask analyses in Section 5.A.4.

5.A.1.1 Undamaged Fuel Dose Rates

The maximum dose rates for the storage cask with undamaged fuel are summarized in Table 5.A.1-1 and Table 5.A.1-2. The standard deviation resulting from the Monte Carlo evaluation used by MCNP (1) is indicated in the tables. The storage cask maximum side dose rate is 28.9 (1.3%)

mrem/hr slightly below the fuel midplane elevation. The maximum storage cask top axial surface dose rate is 18.7 (6.9%) mrem/hr on the top lid surface just above the annulus between the canister and the storage cask liner. Since the storage cask is vertical during norma l storage operation, the bottom is inaccessible. Therefore, no bottom axial dose rates are presented. The average dose rates at the inlets and outlets are 38.3 (1.4%) mrem/hr and 2.0 (0.5%) mrem/hr, respectively.

Top axial dose rates are based on 145 lb/ft 3 concrete in the lid. Using the design minimum density of 140 lb/ft3, the increase in maximum top dose rates is within the statistical uncertainty (1 ) of the results.

Under accident conditions involving a projectile imp act and a loss of 6 inches of concrete, the surface dose rate increases to 278 mrem/hr at the impact location and 105 mrem/hr at a distance of 1 meter from the surface. There are no design basis accidents that result in a tip-over of the MPC-LACBWR storage cask.

The maximum dose rates for undamaged fuel in the tr ansfer cask for the wet and dry canister cavity configurations encountered during canister closure operations are presented in Table 5.A.1-3 and Table 5.A.1-4, respectively.

With a wet canister cavity (no port covers), the maximum dose rates are 68.2 (2.3%) and 471.2 (1.7%) mrem/hr on the radial surface and top axial surface, respectively. The bottom surface of the cask has a maximum dose rate of 23.8 (2.2%) mrem/hr.

With a dry canister cavity (port covers installed), the maximum dose rates are 102.2 (5.2%)

mrem/hr and 598.7 (1.4%) mrem/hr on the radial and top axial surfaces, respectively. The bottom surface of the cask has a maximum dose rate of 54.2 (2.2%) mrem/hr.

5.A.1-3 NAC-MPC FSAR January 2024 Docket No. 72-1025 Revision 24A

5.A.1.2 Damaged Fuel Dose Rates

To ensure that the worst case configuration is considered, two damaged fuel scenarios are evaluated for the 32 peripheral basket locations.

The first scenario assumes the damaged fuel collects over the active fuel length of the fuel assembly. This scenario is modeled by filling the fuel rod interstitial volume with UO2 and increasing the fuel neutron, gamma, and n-gamma source consistent with this increase in mass. A comparison of dose rate profiles for the 68 assembly intact fuel results and 36 intact and 32 damaged assemblies in Section 5.A.4 demonstrates that the damaged fuel model dose rates are less due to the increase in self-shielding from the 32 peripheral assemblies compensating for the increase in source strength.

In the second scenario, damaged fuel is assumed to migrate from the active fuel into the lower end fitting region of the fuel assembly, filling all the modeled void space. However, no credit is taken for the reduction in lower end fitting hardware dose rate due to the added UO2 mass and self-shielding nor for the reduction in fuel mass migrated from the active fuel region. In this case, storage cask inlet and transfer cask bottom su rface dose rates increase due to the addition of damaged fuel. The storage cask inlet dose rate increase is 36.7 mrem/hr, effectively doubling the air inlet dose rate. The transfer cask bottom axial dose rate increase is 22.1 mrem/hr, increasing the bottom axial dose rate by approximately 41%. Note that the radial location of the maximum dose rate at the bottom of the transfer cask differs between the undamaged and damaged fuel models.

Damaged fuel maximum dose rates are summarized in Table 5.A.1-5 and Table 5.A.1-6.

Based on the damaged fuel results, a recalculation of storage cask top dose rates with 140 lb/ft3 lid concrete is not required.

5.A.1-4 NAC-MPC FSAR January 2024 Docket No. 72-1025 Revision 24A

Table 5.A.1-1 Summary of MPC-LACBWR Storage Cask Maximum Dose Rates -Undamaged Fuel Surface 1 meter Location Source mrem/hr FSD mrem/hr FSD Top Axial1 Neutron 0.5 6.9% 0.1 6.8%

Gamma 18.2 7.1% 5.5 3.6%

Total 18.7 6.9% 5.6 3.5%

Side Neutron 0.2 2.0% 0.1 1.5%

(Normal) Gamma 28.7 1.3% 11.4 0.9%

Total 28.9 1.3% 11.5 0.9%

Side Neutron 0.7 1.7% 0.2 1.4%

(Accident) Gamma 277.1 1.1% 104.5 0.8%

Total 277.8 1.1% 104.7 0.8%

1. Top axial dose rates are based on 145 lb/ft3 concrete in the lid. Using the design minimum density of 140 lb/ft 3, the increase in maximum top dose rates is within the statistical uncertainty (1) of the resu lts.

Table 5.A.1-2 Summary of MPC-LACBWR Storage Cask Inlet/Outlet Maximum Dose Rates-Undamaged Fuel Inlet Average Outlet Average Source mrem/hr FSD mrem/hr FSD Fuel Neutron 1.3 1.4% 0.1 1.2%

Fuel Gamma 6.8 6.5% 0.1 7.6%

Fuel Hardware 3.2 3.6% 0.1 2.6%

Lower End Fitting 27.0 0.9% -- --

Upper Plenum -- -- 1.2 0.4%

Upper End Fitting -- -- 0.5 0.5%

Total 38.3 1.4% 2.0 0.5%

5.A.1-6 NAC-MPC FSAR January 2024 Docket No. 72-1025 Revision 24A

Table 5.A.3-8 MPC-LACBWR Structural and Shield Material Regional Densities Material Nuclide/ Density Density Element [atom/-b-cm] [g/cm3]

Water H 6.6752E-02 0.9982 O 3.3376E-02 Stainless Steel Cr 1.7472E-02 7.9400 Mn 1.7407E-03 Fe 5.9505E-02 Ni 7.7392E-03 Carbon Steel Fe 8.3494E-02 7.8212 C 3.9250E-03 Neutron Poison Al 5.0464E-02 2.6707 B-10 3.4695E-03 B-11 1.4389E-02 C 4.4631E-03 Aluminum Al 6.0262E-02 2.7000 Lead Pb 3.2967E-02 11.344 NS-4-FR B-10 9.1384E-05 1.6316 Al 7.8002E-03 C 2.2621E-02 B-11 3.3665E-04 H 5.8507E-02 N 1.3904E-03 O 2.6107E-02 Concrete Fe 3.5073E-04 2.32331 Ca 1.5360E-03 Si 1.6788E-02 H 1.3882E-02 O 4.6535E-02 Na 1.7649E-03 Al 1.7630E-03

1 Top axial dose rates are based on 145 lb/ft3 (2.3233 g/cm3) concrete in the lid. Using the design minimum density of 140 lb/ft3 (2.2432 g/cm3), the increase in maximum top dose rates is within the statistical uncertainty (1) of the results.

5.A.3-15 NAC-MPC FSAR January 2024 Docket No. 72-1025 Revision 24A

5.A.4.2 MCNP Flux-to-Dose Rate Conversion Factors

The ANSI/ANS 6.1.1-1977 flux-to-dose rate conversion factors are used in all cask shielding evaluations. Neutron and gamma dose conversion factors are listed in Table 5.A.4-1 and Table 5.A.4-2, respectively.

5.A.4.3 MPC-LACBWR Storage Cask Three-Dimensional Dose Rates

5.A.4.3.1 Undamaged Fuel

Storage cask three-dimensional model side dose rates are presente d in Figure 5.A.4-1. The figure shows the dose rate profiles at various radial distances from the cask surface. Figure 5.A.4-2 shows the contributions to the radial surface dose rate from each source component. Figure 5.A.4-3 shows the corresponding top axial dose rate profile at various axial distances from the cask surface and Figure 5.A.4-4 gives the contributions to the top axial surface dose rate from each source type. The azimuthal dose profile at the air inlet elevation is shown in Figure 5.A.4-5. Similarly, the azimuthal dose rate profile at the cask air outlets is shown in Figure 5.A.4-6.

The maximum radial and top axial surface dose rates for the storage cask are 28.9 (1.3%) and 18.7 (6.9%) mrem/hr, respectively. At the inlet locations, the average dose rate of the four symmetric inlet openings is 38.3 (1.4%) mrem/hr. At the outlets, the average dose rate at the four symmetric outlet locations is 2.0 (0.5%) mrem/hr.

Under accident conditions involving a projectile imp act and a loss of 6 inches of concrete, the surface dose rate increases to 278 mrem/hr at the impact location and 105 mrem/hr at a distance of 1 meter from the surface.

Figure 5.A.4-32 shows the top surface dose rate profile for the baseline analysis (MCNP5 at 145 lb/ft3 lid concrete) and the reduced density (MCNP6 at 140 lb/ft3 lid concrete). The dose rates increase over the center of cask and over the annulus between the canister OD and the concrete cask ID.

Table 5.A.4-3 and Table 5.A.4-4 compare the maximum and average dose rates at 140 lb/ft3 concrete with those at 145 lb/ft3 concrete. Applying +1 to the MCNP5 result yields a dose rate of 20.0 mrem/hr and applying -1 to the MCNP6 result yields a dose rate of 19.1 mrem/hr. Therefore, the increase in maximum dose rate is within 1.

Average dose rates are outside of the 1 threshold. Given that top dose rates are a maximum of 2.2% of the downfield dose rates, the 8.6% increase in average dose rates equates to an overall increase in downfield dose rates of less than 0.2%. Therefore, the increase in downfield dose rates and ISFSI occupational dose rates is negligible.

5.A.4-2 NAC-MPC FSAR January 2024 Docket No. 72-1025 Revision 24A

5.A.4.3.2 Damaged Fuel To ensure that the worst case configuration is considered, two damaged fuel scenarios are evaluated for the 32 peripheral basket locations.

The first scenario assumes the damaged fuel collects over the active fuel length of the fuel assembly. This scenario is modeled by filling the fuel rod interstitial volume with UO2 and increasing the fuel neutron, gamma, and n-gamma source consistent with this increase in mass. A comparison of dose rate profiles for the 68 assembly intact fuel results and 36 intact and 32 damaged assemblies, shown in Figure 5.A.4-7 and Figure 5.A.4-8, demonstrates that the damaged fuel model dose rates are less due to the increase in self-shielding from the 32 peripheral assemblies compensating for the incr ease in source strength.

In the second scenario, damaged fuel is assumed to migrate from the active fuel into the lower end fitting region of the fuel assembly, filling all the modeled void space. In this case, the combined gamma and neutron sources result in a maximum radial dose rate of 4.3 mrem/hr at the bottom of the cask (average increase of 1.0 mrem/hr), shown in Figure 5.A.4-9. The inlet dose rate increase, as shown in Figure 5.A.4-10, is 36.7 mrem/hr, effectively doubling the air in let dose rate. However, no credit is taken for the reduction in lower end fitting hardware dose rate due to the added UO2 mass and self-shielding nor for the reduction in fuel mass migrated from the active fuel region.

Based on the damaged fuel results, a recalculation of storage cask top dose rates with 140 lb/ft3 lid concrete is not required.

5.A.4.4 MPC-LACBWR Transfer Cask Three-Dimensional Dose Rates

The MPC-LACBWR transfer cask is analyzed under wet and dry conditions corresponding with the operational configurations associated with loading the canister with spent fuel assemblies in a fuel pool environment. Under wet conditions, the canister is assume d to be filled with water to the top of the upper plenum region. This distance accounts for the removal of water from the canister prior to welding the closure lid to the canister in order to prevent water contamination of the closure lid weld.

Transfer cask dose rates are calculated for two lid configurations. The first configuration consists of the closure lid without port covers with the canister in the wet condition. The second configuration consists of the closure lid with the canister in the dry condition and port covers are installed.

5.A.4-3 NAC-MPC FSAR January 2024 Docket No. 72-1025 Revision 24A

5.A.4.4.1 Undamaged Fuel For a wet canister cavity and no port covers, dose rate profiles are shown in Figure 5.A.4-11 through Figure 5.A.4-16. The maximum dose rates are 68.2 (2.3%) and 471.2 (1.7%) mrem/hr on the radial surface and top axial surface, respectively. The bottom surface of the cask has a maximum dose rate of 23.8 (2.2%) mrem/hr.

For a dry canister cavity and installed port covers, dose rate profiles are shown in Figure 5.A.4-17 through Figure 5.A.4-22. The maximum dose rates are 102.2 (5.2%) mrem/hr and 598.7 (1.4%)

mrem/hr on the radial and top axial surfaces, re spectively. The bottom surface of the cask has a maximum dose rate of 54.2 (2.2%) mrem/hr.

5.A.4.4.2 Damaged Fuel The same damaged fuel scenarios were analyzed for the transfer cask under dry conditions as those described for the storage cask. Like the storage cask (scenario 1), a comparison of dose rate profiles for the 68 assembly intact fuel results and 36 intact and 32 damaged assemblies, shown in Figure 5.A.4-23 through Figure 5.A.4-25, demonstrates that the damaged fuel model dose rates are less due to the increase in self-shielding from the 32 peripheral assemblies compensating for the increase in source strength. In the second scenario (damaged fuel in the lower end fitting region),

the combined gamma and neutron sources result in a maximum radial dose rate of 23.4 mrem/hr at the bottom of the cask (average increase of 3.7 mrem/hr), shown in Figure 5.A.4-26. The bottom axial dose rate increase is 22.1 mrem/hr, shown in Figure 5.A.4-27, increasing the bottom axial dose rate by approximately 41%. As stated previously, no credit is taken for the reduction in lower end fitting hardware dose rate due to the added UO2 mass and self-shielding nor for the reduction in fuel mass migrated from the active fuel region.

5.A.4.5 Partial Flooding Evaluation

To confirm that the analyzed dry and wet canister conditions bound a partial flooding scenario, additional MCNP inputs were setup to model a canister filled up to 70% of the active fuel region.

The results in Figure 5.A.4-28 and Figure 5.A.4-29 demonstrate that the dry canister configuration produces bounding transfer cask dose rates.

5.A.4.6 Validation of Fresh Fuel Material Composition

The validity of the dose rate results summarized he rein is based on the ability to apply fresh fuel material composition based MCNP results to spent fuel. To confirm the accuracy of this assumption, radial dose rates are calculated using the SAS2H-calculated isotopic composition of

5.A.4-4 NAC-MPC FSAR January 2024 Docket No. 72-1025 Revision 24A

the design basis Allis Chalmers fuel assembly (22,000 MWd/MTU, 3.6 wt % 235U, and 28 years cool time) in the transfer and storage casks and compared to the fresh fuel results. Radial dose rate profiles for fresh and spent fuel isotopi cs are shown in Figure 5.A.4-30 and Figure 5.A.4-31 and demonstrate the acceptability of the fresh fuel assumption (i.e., there is no significant dose change associated with the fresh fuel model).

5.A.4.7 Justification of Exxon Fuel in DFCs

In the event that an Exxon Nuclear Company fuel assembly is found to be damaged, the assembly may be loaded in a DFC location rather than a standard location. A bounding scenario, under which a basket is loaded with 31 Allis Chalmers assemblies and 37 Exxon Nuclear Company assemblies (36 undamaged and 1 damaged), the change in 68-assembly source is as follows.

Source 31/37 vs. 32/36 Change Fuel Neutron -0.5%

Fuel N-Gamma -0.5%

Fuel Gamma 0.0%

Fuel Hardware 1.0%

Lower End Fitting 1.3%

Upper Plenum 0.4%

Upper End Fitting 0.4%

While a slight azimuthal increase in gamma dose ra te may be present at the radial location of the DFC under this scenario, there is no significant change in cask average dose rates when loading Exxon fuel assemblies into DFCs.

5.A.4-5 NAC-MPC FSAR January 2024 Docket No. 72-1025 Revision 24A

Figure 5.A.4-32 Concrete Cask Top Surface Dose Rate Comparison for 145 and 140 lb/ft3 Lid Concrete Density

20

18

16

14

12 MCNP5, 145 lb/ft3

10 MCNP6, 140 lb/ft3

8

6

4

2

0 020406080100120140160180 Radial Position [cm]

Table 5.A.4-1 ANSI Standard Neutron Flux-To-Dose Rate Factors Energy (MeV) (rem/hr)/(n/cm2/sec) 2.5E-08 3.67E-06 1.0E-07 3.67E-06 1.0E-06 4.46E-06 1.0E-05 4.54E-06 1.0E-04 4.18E-06 1.0E-03 3.76E-06 1.0E-02 3.56E-06 1.0E-01 2.17E-05 5.0E-01 9.26E-05 1.0 1.32E-04 2.5 1.25E-04 5.0 1.56E-04 7.0 1.47E-04 10.0 1.47E-04 14.0 2.08E-04 20.0 2.27E-04

5.A.4-22 NAC-MPC FSAR January 2024 Docket No. 72-1025 Revision 24A

Table 5.A.4-2 ANSI Standard Gamma Flux-To-Dose Rate Factors Energy (MeV) (rem/hr)/( /cm2/sec) Energy (MeV) (rem/hr)/( /cm2/sec) 0.01 3.96E-06 1.4 2.51E-06 0.03 5.82E-07 1.8 2.99E-06 0.05 2.90E-07 2.2 3.42E-06 0.07 2.58E-07 2.6 3.82E-06 0.1 2.83E-07 2.8 4.01E-06 0.15 3.79E-07 3.25 4.41E-06 0.2 5.01E-07 3.75 4.83E-06 0.25 6.31E-07 4.25 5.23E-06 0.3 7.59E-07 4.75 5.60E-06 0.35 8.78E-07 5 5.80E-06 0.4 9.85E-07 5.25 6.01E-06 0.45 1.08E-06 5.75 6.37E-06 0.5 1.17E-06 6.25 6.74E-06 0.55 1.27E-06 6.75 7.11E-06 0.6 1.36E-06 7.5 7.66E-06 0.65 1.44E-06 9 8.77E-06 0.7 1.52E-06 11 1.03E-05 0.8 1.68E-06 13 1.18E-05 1 1.98E-06 15 1.33E-05

Table 5.A.4-3 Storage Cask Top Maximum Dose Rate Comparison at Lid Concrete Density of 140 lb/ft3 Dose Rate Delta Delta Source (mrem/hr) FSD (mrem/hr) (%)

Neutron 0.5 4.3% 0.0 0.0%

Gamma 19.6 5.3% 1.4 7.7%

Total 20.1 5.2% 1.4 7.5%

Table 5.A.4-4 Storage Cask Top Averagr Dose Rate Comparison at Lid Concrete Density of 140 lb/ft3 Dose Rate Delta Delta Source (mrem/hr) FSD (mrem/hr) (%)

Neutron 0.1 3.1% 0.0 -0.5%

Gamma 6.0 2.3% 0.5 8.8%

Total 6.1 2.3% 0.5 8.6%

5.A.4-23 NAC-MPC FSAR January 2024 Docket No. 72-1025 Revision 24A

5.A.5 References

[A1] MCNP - A General Monte Carlo N-Particle Transport Code, Version 5, X-5 Monte Carlo Team, Los Alamos National Laboratory, Los Alamos, NM, April 24, 2003.

[A2] D. J. Whalen, et al., MCNP: Photon Benchmark Problems, LA-12196, September 1991.

[A3] D. J. Whalen, et al., MCNP: Neutron Benchmark Problems, LA-12212, September 1991.

[A4] NUREG/CR-6802, Recommendations for Shielding Evaluations for Transport and Storage Packages, U.S. Nuclear Regulatory Commission, Washington, DC, May 2003.

[A5] EPRI TR-104329, Evaluation of Shielding Analysis Methods in Spent Fuel Cask Environments, B. L. Broadhead, et al., Electric Power Research Institute, Palo Alto, CA, May 1995.

[A6] NEACRP-L-339, Summary of the Results of the Comparison of Calculations and Measurements for the TN 12 Flask Carried Out Under the NEACRP Intercomparison of Shielding Codes, H. F. Locke, Nuclear Energy Agency, Paris, France, 1992.

[A7] ORNL/TM-12667, Validation of the SCALE System for PWR Spent Fuel Isotopic Composition Analyses, Oak Ridge National Laboratory, March 1995.

[A8] ORNL/TM-13317, An Extension of the Validation of SCALE (SAS2H) Isotopic Prediction for PWR Spent Fuel, Oak Ridge National Laboratory, September 1996.

[A9] NUREG/CR-6798, Isotopic Analysis of High Burnup PWR Spent Fuel Samples from the Takahama-3 Reactor, US Nuclear Regulatory Commission, January 2003.

[A10] ORNL/TM-13315, Validation of SCALE (SAS2H) Isotopic Predictions for BWR Spent Fuel, Oak Ridge National Laboratory, September 1998.

[A11] ORNL/TM-13687, Prediction of the Isotopic Composition of UO2 Fuel from a BWR:

Analysis of the DU1 Sample from the Dodewaard Reactor, Oak Ridge National Laboratory, October 1998.

[A12] LA-UR-17-29981, MCNP Users Manual, Version 6.2, Manual Rev. 0, October 2017.

5.A.5-1