ML19100A205

Enclosure 4 - NAC International Final Safety Analysis Report, Revision 12, Volume 2 of 2

ML19100A205
Person / Time
Site:	07201025
Issue date:	04/30/2019
From:	NAC International
To:	Office of Nuclear Material Safety and Safeguards
Shared Package
ML19100A212	List: ML19100A202 ML19100A203 ML19100A205
References
ED20190023
Download: ML19100A205 (31)

Text

ANAC ii INTE RNA TIO NAL Atlanta Corporate Headquarters: 3930 East Jones Bridge Road, Norcross, Georgia 30092 USA Phone 770-447-1144, Fax 770-447-1797, www.nacintl.com

NAC-MPC FSAR Docket No. 72-1025 April 2019 Revision 12 List of Effective Pages Chapter 1 1.5-32 thru 1.5-34........................ Revision 2 1-i................................................. Revision 5 1.5-35........................................... Revision 7 1-ii................................................ Revision 8 1.5-36 thru 1.5-41........................ Revision 2 I-iii............................................... Revision 5 1.5-42 thru 1.5-43........................ Revision 9 1-iv............................................... Revision 9 1.5-44 thru 1.5-48........................ Revision 2 1-1................................................ Revision 3 1.5-49........................................... Revision 7 1-2 thru 1-8.................................. Revision 8 1.5-50 thru 1.5-59........................ Revision 2 1.1-1 thru 1.1-2............................ Revision 8 1.6-1............................................. Revision 3 1.1-3 thru 1.1-5............................ Revision 2 1.6-2............................................. Revision 2 1.1-6............................................. Revision 0 l.7-1............................................. Revision 9 1.1-7............................................. Revision 2 1.7-2............................................. Revision 3 1.2-1............................................. Revision 8 1.7-3............................................. Revision 9 1.2-2 thru 1.2-5............................ Revision 3 1.2-6............................................. Revision 7 61 drawings ( see Chapter I) 1.2-7 thru 1.2-9............................ Revision 3 1.2-10 thru 1.2-12........................ Revision 7 Appendix l.A 1.2-13 thru 1.2-21........................ Revision 3 l.A-i............................................. Revision 8 1.2-22........................................... Revision 9 1.A-ii............................................ Revision 9 1.2-23........................................... Revision 3 1.A-1 thru l.A-5........................... Revision 8 1.3-1 thru 1.3-4............................ Revision 8 l.A.1-1 thru l.A.1-6..................... Revision 8 1.3-5 thru 1.3-6............................ Revision 5 l.A.2-1 thru 1.A.2-4..................... Revision 8 1.3-7 thru 1.3-10.......................... Revision 3 1.A.2-5......................................... Revision 9 1.3-11........................................... Revision 5 I.A.2-6 thru l.A.2-17................... Revision 8 1.3-12 thru 1.3-14........................ Revision 3 l.A.2-18....................................... Revision 9 1.4-1 thru 1.4-3............................ Revision 2 l.A.2-19 thru l.A.2-20................. Revision 8 1.5-1............................................. Revision 2 l.A.2-21 thru l.A.2-22................. Revision 9 1.5-2........................................... Revision 11 l.A.3-1 thru l.A.3-5..................... Revision 8 1.5-3 thru 1.5-5............................ Revision 2 l.A.4-1 thru l.A.4-2..................... Revision 8 1.5-6........................................... Revision 11 J.A.5-1......................................... Revision 8 1.5-7 thru 1.5-9............................ Revision 2 J.A.5-2....................................... Revision 11 1.5-10 thru 1.5-11........................ Revision 7 l.A.5-3 thru 1.A.5-5..................... Revision 8 1.5-12 thru 1.5-22........................ Revision 2 l.A.5-6....................................... Revision 11 1.5-23........................................... Revision 7 l.A.5-7 thru l.A.5-42................... Revision 8 1.5-24 thru 1.5-30........................ Revision 2 l.A.5-43....................................... Revision 9 1.5-31........................................... Revision 7 J.A.5-44 thru l.A.5-48................. Revision 8 Page I of 9

NAC-MPC FSAR Docket No. 72-1025 April 2019 Revision 12 List of Effective Pages (continued) l.A.5-49........................................ ev1s1on R..

9 l.A.5-50 thru 1.A.5-60................. ev1s10n R

8 l.A.6-1.......................................... ev1s1on R

8 l.A.7-1........................................ Revision 12 17 MPC-LACBWR drawings (see Appendix l.A)

Chapter 2 2-i thru 2-ii.................................... Revision 8 2-iii............................................. Revision 11 2-1................................................. Revision 8 2-2................................................. Revision 2 2-3................................................. Revision 3 2-4 thru 2-5................................... Revision 2 2.1-1 thru 2.1-11........................... Revision 8 2.1-12 thru 2.1-20......................... ev1s1on R

3 R..

2 2.2-1 thru 2.2-2............................. ev1s1on 2.2-3 thru 2.2-4............................. Revision 0 2.2-5 thru 2.2-7............................. Revision 2 2.2-8.............................................. Revision 0 2

2.2-9 thru 2.2-11........................... Rev1s1on 2.3-1 thru 2.3.2........................... ev1s1on R..

11 2.3-3.............................................. Revision 0 2.3-4.............................................. Revision 7 2.3-5.............................................. Revision 0 2.3-6.............................................. Revision 3 2.3-7.............................................. Revision 2 2.3-8.............................................. Revision 0 R

11 2.3-9 thru 2.3-21......................... ev1s1on 2

2.4-1 thru 2.4-2............................. Rev1s10n R

0 2.4-3.............................................. ev1s1on 2.4-4.............................................. Revision 2 Page 2 of 9 Appendix 2.A 2.A.i thru 2.A.ii............................. Revision 8 2.A.iii.......................................... Revision 11 2.A-1............................................. Revision 8 2.A-2............................................. Revision 9 2.A-3............................................. Revision 8 2.A.1-1 thru 2.A.1-5..................... Revision 8 2.A.2-1 thru 2.A.2-2..................... Rev1s10n 8

2.A.3-1 thru 2.A.3-4................... Rev1s1on 11 2.A.3-1 thru 2.A.3-7..................... Revision 8 2.A.3-8........................................ Revision 11 2.A.4-1 thru 2.A.4-3..................... Rev1s1on 8

Chapter 3 3-i.................................................. Revision 8 3-ii............................................... Revision 10 3-iii............................................... Revision 3 3-iv................................................ Revision 5 3-v thru -v11.................................

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• Revision 3 3.1-1 thru 3.1-8............................. Revision 8 3.1.9.............................................. Revision 3 3.2-1 thru 3.2-3............................. Revision 2 R..

2 3.3-1 thru 3.3-9............................. ev1s1on 3.3-10...................................... Amendment 1 3.3-11............................................ Revision 0 3.3-12 thru 3.3-14......................... ev1s1on R..

2 3.4.1-1........................................... Revision 8

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3.4.1-2........................................... ev1s1on 3.4.1-3 thru 3.4.1-4....................... Revision 2 3.4.1-5........................................... Revision 3 3.4.1-6........................................... Revision 2 3.4.1-7......................................... Revision 10 3.4.2-1 thru 3.4.2-2....................... Revision 2 3.4.3-1 thru 3.4.3-39..................... ev1s1on R..

2 3.4.3-40......................................... Revision 3

NAC-MPC FSAR Docket No. 72-1 025 April 2019 Revision 12 List of Effective Pages (continued) 3.4.3-41 thru 3.4.3-47.................. Revision 2 3.A.1-1 thru 3.A.1-3..................... Revision 8 3.4.3-48........................................ Revision 4 3.A.2-1......................................... Revision 8 3.4.3-49 thru 3.4.3-55.................. Revision 2 3.A.2-2......................................... Revision 9 3.4.3-56........................................ Revision 3 3.A.3-1......................................... Revision 8 3.4.3-57 thru 3.4.3-71.................. Revision 2 3.A.4-1 thru 3.A.4-8..................... Revision 8 3.4.3-72 thru 3.4.3-73.................. Revision 5 3.A.4-9......................................... Revision 9 3.4.4-1 thru 3.4.4-9...................... Revision 2 3.A.4-10 thru 3.A.4-33................. Revision 8 3.4.4-10........................................ Revision 3 3.A.4-34 thru 3.A.4-36............... Revision 12 3.4.4-11 thru 3.4.4-14.................. Revision 2 3.A.5-1......................................... Revision 8 3.4.4-15 thru 3.4.4-53.................. Revision 3 3.A.6-1 thru 3.A.6-2..................... Revision 8 3.4.4-54 thru 3.4.4-56.................. Revision 4 3.A.7-1......................................... Revision 8 3.4.4-57........................................ Revision 5 3.A.8-1......................................... Revision 8 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 4.1-1 thru 4.1-2............................ Revision 8 3.7-2............................................. Revision 9 4.1-3............................................. Revision 2 3.8-1............................................. Revision 3 4.1-4............................................. Revision 5 3.8.1-1 thru 3.8.1-4........ *.............. Revision 0 4.1-5............................................. Revision 9 3.8.2-1 thru 3.8.2-4...................... Revision 0 4.1-6............................................. Revision 2 3.8.3-1 thru 3.8.3-2...................... Revision 2 4.1-7............................................. Revision 5 3.8.4-1 thru 3.8.4-2...................... Revision 2 4.2-1 thru 4.2-2............................ Revision 2 3.8.5-1 thru 3.8.5-2...................... Revision 9 4.2-3............................................. Revision 0 3.8.6-1 thru 3.8.6-2...................... Revision 9 4.2-4 thru 4.2-5............................ Revision 2 3.8.7-1 thru 3.8.7-2.................... Revision 10 4.2-6 thru 4.2-12.......................... Revision 0 4.3-1............................................. Revision 2 Appendix 3.A 4.4-1 thru 4.4-3............................ Revision 2 3.A-i thru 3.A.ii............................ Revision 8 4.4-4............................................. Revision 0 3.A.iii......................................... Revision 12 4.4-5............................................. Revision 2 3.A-1............................................ Revision 8 4.4-6............................................. Revision 0 4.4-7........................................ Amendment 1 Page 3 of 9

NAC-MPC FSAR Docket No. 72-1025 April 2019 Revision 12 List of Effective Pages (continued) 4.4-8 thru 4.4-9............................. Revision 2 4.6-1 thru 4.6-2............................. Revision 2 4.4-1 O............................................ 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 R..

8 4.A.2-1.......................................... ev1s1on 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.3-3 5...................................... Revision 12 4.4-28 thru 4.4-29......................... Revision 2

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12 4.A.4-1 thru 4.A.4-2................... ev1s1on 4.4-30............................................ Revision 0 R..

12 4.A.5-1........................................ ev1s1on R..

2 4.4-31 thru 4.4-35......................... ev1s1on 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 R

8 5.1-1 thru 5.1-2............................. ev1s1on 4.5-1.............................................. Revision 5 R

3 5.1.1-1 thru 5.1.1-6....................... ev1s1on 4.5-2 thru 4.5-6............................. Revision 2 5.1.2-1 thru 5.1.2-4....................... Revision 2 4.5-7.............................................. Revision 3 5.1.2-5 thru 5.1.2-6....................... Revision 3 4.5-8 thru 4.5-15........................... Revision 2 5.2-1.............................................. Revision 2 4.5-16............................................ Revision 5 5.2.1-1 thru 5.2.1-17..................... Revision 3 4.5-17 thru 4.5-21......................... Revision 2 5.2.2-1........................................... Revision 3 4.5-22............................................ Revision 5 5.2.2-2 thru 5.2.2-19..................... Revision 2 4.5-23............................................ Revision 2 5.3-1.............................................. Revision 3 4.5-24............................................ Revision 5 5.3.1-1 thru 5.3.1-26..................... Revision 3 4.5-25 thru 4.5-26......................... Revision 2 5.3.2-1 thru 5.3.2-2....................... Revision 2 4.5-2 7............................................ Revision 5 5.3.2-3........................................... Revision 3 4.5-28............................................ Revision 2 5.3.2-4 thru 5.3.2-16..................... Revision 2 4.5-29 thru 4.5-34......................... Revision 5 5.4-1.............................................. Revision 2 4.5-35 thru 4.5-37......................... Revision 2 5.4.1-1 thru 5.4.1-34..................... Revision 3 4.5-3 8............................................ Revision 5 5.4.2-1 thru 5.4.2-47..................... Revision 2 4.5-39 thru 4.5-41......................... Revision 2 5.5-1.............................................. Revision 2 4.5-42 thru 4.5-4 7......................... Revision 5

5. 5-2.............................................. Revision 3 4.5-48 thru 4.5-51......................... Revision 2 5.6.1-1 thru 5.6.1-71..................... Revision 3 4.5-52............................................ Revision 5 Page 4 of 9 I

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NAC-MPC FSAR Docket No. 72-1025 April 2019 Revision 12 List of Effective Pages (continued) 5.6.2-1 thru 5.6.2-36.................... Revision 3 6.4.2-1 thru 6.4.2-12.................... Revision 2 6.4.2-13 thru 6.4.2-17.................. Revision 3 Appendix 5.A 6.4.2-18 thru 6.4.2-21.................. Revision 2 5.A-i thru 5.A-v............................ Revision 8 6.4.2-22 thru 6.4.2-23.................. Revision 3 5.A-1............................................ Revision 8 6.4.2-24 thru 6.4.2-26.................. Revision 2 5.A.1-1 thru 5.A.1-8..................... Revision 8 6.5-1 thru 6.5-2............................ Revision 2 5.A.2-1 thru 5.A.2-17................... Revision 8 6.5.1-1.......................................... Revision 2 5.A.3-1 thru 5.A.3-15................... Revision 8 6.5.1-2 thru 6.5.1-3...................... Revision 3 5.A.4-1 thru 5.A.4-23................... Revision 8 6.5.1-4 thru 6.5.1-19.................... Revision 2 5.A.5-1......................................... Revision 8 6.5.1-20........................................ Revision 3 5.A.6-1 thru 5.A.6-72................... Revision 8 6.5.2-1.......................................... Revision 3 6.5.2-2 thru 6.5.2-20.................... Revision 2 Chapter 6 6.6-1 thru 6.6-2............................ Revision 2 6-i thru 6-ii................................... Revision 8 6.7-1............................................. Revision 3 6-iii thru 6-vi................................ Revision 3 6.7.1-1 thru 6.7.1-126.................. Revision 2 6.1-1............................................. Revision 2 6.7.1-127 thru 6.7.1-160.............. Revision 3 6.1-2............................................. Revision 8 6.7.2-1 thru 6.7.2-44.................... Revision 2 6.1.1-1 thru 6.1.1-2...................... Revision 8 6.1.2-1 thru 6.1.2-2...................... Revision 2 Appendix 6.A 6.2-1............................................. Revision 2 6.A-i thru 6.A-iv.......................... Revision 8 6.2.1-1 thru 6.2.1-2...................... Revision 3 6.A-1............................................ Revision 8 6.2.1-3 thru 6.2.1-5...................... Revision 2 6.A.1-1 thru 6.A.1-5..................... Revision 8 6.2.1-6.......................................... Revision 3 6.A.2-1 thru 6.A.2-2..................... Revision 8 6.2.1-7.......................................... Revision 2 6.A.3-1 thru 6.A.3-19................... Revision 8 6.2.2-1.......................................... Revision 3 6.A.4-1 thru 6.A.4-28................... Revision 8 6.2.2-2 thru 6.2.2-4...................... Revision 2 6.A.5-1 thru 6.A.5-34................... Revision 8 6.3-1............................................. Revision 2 6.A.6-1........................................ Revision 8 6.3.1-1.......................................... Revision 2 6.A.7-1 thru 6.A.7-43................... Revision 8 6.3.1-2.......................................... Revision 3 6.3.1-3 thru 6.3.1-9...................... Revision 2 Chapter 7 6.3.1-10........................................ Revision 3 7-i................................................. Revision 8 6.3.2-1.......................................... Revision 3 7-ii................................................ Revision 2 6.3.2-2 thru 6.3.2-7...................... Revision 2 7-1................................................ Revision 8 6.4-1............................................. Revision 2 7.1-1............................................. Revision 3 6.4.1-1 thru 6.4.1-33.................... Revision 3 7.1-2............................................. Revision 2 Page 5 of 9

NAC-MPC FSAR Docket No. 72-1025 April 2019 Revision 12 List of Effective Pages (continued) 7.l-3.............................................. Revision 7 8.A-1 thru 8.A-2........................... Revision 8 7.1-4.............................................. Revision 3 8.A.1-1 thru 8.A.1-7..................... Revision 8 7.1-5 thru 7.1-10........................... Revision 2 8.A.1-8.......................................... Revision 9 7.2-1.............................................. Revision 3 8.A.1-9 thru 8.A.1-14................... Revision 8 7.2-2.............................................. Revision 7 8.A.2-1.......................................... Revision 8 7.3-1.............................................. Revision 2 8.A.3-1 thru 8.A.3-3..................... Revision 8 Appendix 7.A Chapter 9 7.A-i thru 7.A-ii............................ Revision 8 9-i.................................................. Revision 8 7.A-1............................................. Revision 8 9-1................................................. Revision 8 7.A.1-1 thru 7.A.1-6..................... Revision 8 9.1-1.............................................. Revision 2 7.A.2-1 thru 7.A.2-2..................... Revision 8 9.1-2 thru 9.1-4............................ ;Revision 3 7.A.3-1.......................................... Revision 8 9.l-5.............................................. Revision 7 7.A.4-1.......................................... Revision 8 9.l-6.............................................. Revision 9 9.1-7.............................................. Revision 8 Chapter 8 9.l-8.............................................. Revision 7 8-i.................................................. Revision 8 9.1-9 thru 9.1-10........................... Revision 9 8-ii................................................. Revision 5 9.2-1............................................ Revision 12 8-1................................................. Revision 8 9.3-1.............................................. Revision 2 8-2................................................. Revision 2 8.1-1 thru 8.1-2............................. Revision 2 Appendix 9.A 8.1-3 thru 8.1-9............................. Revision 7 9.A-i.............................................. Revision 8 8.1-10 thru 8.1-13......................... Revision 6 9.A-1............................................. Revision 8 8.l-14............................................ Revision 7 9.A.1-1 thru 9.A.1-3..................... Revision 8 8.1-15............................................ Revision 6 9.A.2-1 thru 9.A.2-3..................... Revision 9 8.1-16............................................ Revision 5 9.A.2-4 thru 9.A.2-6..................... Revision 8 8.1-17............................................ Revision 7 9.A.3-1 thru 9.A.3-2................... Revision 12 8.1-18 thru 8.1-19......................... Revision 5 9.A.3-3.......................................... Revision 8 8.2-1.............................................. Revision 7 9.A.4-1.......................................... Revision 8 8.2-2.............................................. Revision 2 8.3-1.............................................. Revision 2 Chapter 10 8.3-2 thru 8.3-5............................. Revision 3 I 0-i................................................ Revision 8 10-ii thru 10-iii............................. Revision 2 Appendix 8.A 10.1-1 thru 10.1-2......................... Revision 8 8.A-i thru 8.A-ii............................ Revision 8 10.2-1 thru 10.2-2......................... Revision 3 Page 6 of 9

NAC-MPC FSAR Docket No. 72-1025 April 2019 Revision 12 List of Effective Pages (continued) 10.3-1........................................... Revision 2 11.1.2-3........................................ Revision 2 10.3-2........................................... Revision 7 11.1.2-4........................................ Revision 4 10.3-3........................................... Revision 2 11.1.2-5........................................ Revision 2 10.3-4........................................... Revision 3 11.1.2-6 thru 11.1.2-7.................. Revision 4 10.3-5 thru 10.3-10...................... Revision 2 11.1.3-1 thru 11.1.3-2.................. Revision 7 10.3-11......................................... Revision 3 11.1.4-1........................................ Revision 7 10.3-12 thru 10.3-14.................... Revision 2 11.1.4-2 thru 11.1.4-7.................. Revision 2 10.4-1 thru 10.4-4........................ Revision 3 11.1.5-1 thru 11.1.5-7.................. Revision 2 10.4-5........................................... Revision 2 11.2-1........................................... Revision 8 10.4-6........................................... Revision 3 11.2.1-1........................................ Revision 3 10.4-7thru 10.4-ll...................... Revision2 11.2.1-2 thru 11.2.1-3.................. Revision 2 11.2.1-4........................................ Revision 4 Appendix IO.A 11.2.1-5 thru 11.2.1-8.................. Revision 2 I O.A-i thru IO.A-ii....................... Revision 8 11.2.1-9 thru 11.2.1-10................ Revision 4 1 OA-1........................................... Revision 8 11.2.2-1 thru 11.2.2-14................ Revision 2 I O.A.1-1 thru I 0.A.1-2................. Revision 8 11.2.2-15.................................... Revision 12 I O.A.2-1 thru 1 O.A.2-2................. Revision 8 11.2.3-1........................................ Revision 2 1 O.A.3-1 thru 1 O.A.3-5................. Revision 8 11.2.3-2...................................... Revision 12 1 O.A.4-1 thru 1 O.A.4-8................. Revision 8 11.2.4-1........................................ Revision 2 10.A.5-l....................................... Revision 8 11.2.5-1 thru 11.2.5-5.................. Revision 2 11.2.6-1 thru 11.2.6-7.................. Revision 2 11.2.6-8........................................ Revision 4 11.2.6-9...................................... Revision 12 Chapter 11 11-i............................................... Revision 7 11-ii thru I I-iii.............................. Revision 2 11.2.7-1 thru 11.2.7-2.................. Revision 2 11-iv............................................. Revision 3 11.2.8-1 thru 11.2.8-2.................. Revision 2 I 1-v.............................................. Revision 8 11.2.8-3........................................ Revision 3 11-vi thru 11-vii........................... Revision 3 11.2.9-1 thru 11.2.9-5.................. Revision 2 11-viii........................................... Revision 4 11.2.10-1...................................... Revision 7 11-ix thru 11-xi............................ Revision 3 11.2.10-2 thru 11.2.10-3.............. Revision 2 11-1.............................................. Revision 8 11.2.11-1 thru 11.2.11-5.............. Revision 2 11.1-1........................................... Revision 8 11.2.11-6 thru 11.2.11-8.............. Revision 4 I 1.1.1-1........................................ Revision 7 11.2.11-9...................................... Revision 2 11.1.1-2........................................ Revision 3 11.2.11-10.................................... Revision 4 11.1.2-1........................................ Revision 2 11.2.1 I -11.................................... Revision 2 11.1.2-2........................................ Revision 3 1 I.2.12-1 thru 11.2.12-6.............. Revision 2 11.2.12-7 thru 11.2.12-15............ Revision 3 Page 7 of 9

NAC-MPC FSAR Docket No. 72-1025 April 2019 Revision 12 List of Effective Pages (continued) 11.2.12-16 thru 11.2.12-25........... Revision 2 11.2.12-26..................................... ev1s1on R

3 11.2.12-27 thru 11.2.12-29........... Revision 2 11.2.12-30 thru 11.2.12-58........... Revision 3 11.2.12-59 thru 11.2.12-60........... Revision 4 11.2.12-61 thru 11.2.12-68........... Revision 3 11.2.12-69 thru 11.2.12-72........... Revision 4 11.2.12-73 thru 11.2.12-88........... Revision 3 11.2.13-1 thru 11.2.13-23............. Revision 2 R

3 11.2.13-24..................................... ev1s1on 11.2.13-25..................................... Revision 2 11.3-1............................................ Revision 8 11.3-2...................................... :..... Revision 2 11.3-3............................................ Revision 0 R..

2 11.3-4 thru 11.3-5......................... ev1s1on 11.3-6 thru 11.3-8......................... ev1s1on R..

0 11.3-9............................................ Revision 2 11.3-10 thru 11.3-15..................... ev1s1on R..

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2 11.3-16 thru 11.3-17..................... ev1s1on 1 1.3-18 thru 11.3-20..................... ev1s1on R..

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2 1 1.3-21 thru 1 1.3-22..................... ev1s1on R..

0 1 1.3-23.......................................... ev1s1on 1 1.3-24 thru 1 1.3-34............... Amendment 1 R

3 1 1.3-35.......................................... ev1s1on 11.3-36 thru 1 1.3-41............... Amendment 1 R

3 11.3-42 thru 11.3-46..................... ev1s1on 1 I.4-1............................................ Revision 8 R..

2 11.4. I -1 thru 1 1.4.1-20................. ev1s1on 11.4.2-1 thru 11.4.2-3................... Revision 2 R

3 11.4.2-4 thru 11.4.2-6................... ev1s1on 11.4.2-7 thru 11.4.2-10................. ev1s1on R..

2 11.4.3-1......................................... Revision 3 R..

2 11.4.3-2 thru 11.4.3-4................... ev1s1on R

2 11.4.4-1 thru 1 1.4.4-3................... ev1s1on R

2 1 1.4.5-1 thru 11.4.5-12................. ev1s1on R..

2 11.5-1............................................ ev1s1on Page 8 of 9 11.5-2 thru 11.5-3......................... Revision 4 R..

0 11.6-1............................................ ev1s1on R..

2 I l.6-2............................................ ev1s1on 11.6-3...................................... Amendment 1 R..

2 11.6-4............................................ ev1s1on Appendix 11.A 11.A-i.......................................... Revision 12 11.A-ii thru 11.A-iv.................... ev1s1on R

10 l 1.A-1........................................... Revision 8 11.A.1-l thru 11.A. l-8................. Revision 8 R..

12 11.A. l-9...................................... ev1s1on 11.A. l-l O thru l 1.A.1-15............. Revision 8 11.A.2-l thru l 1.A.2-6................. Revision 8 11.A.2-7 thru l l.A.2-56............. Revision 10 R

8 11.A.3-l........................................ ev1s1on 11.A.4-l thru 11.A.4-7................. Revision 8 11.A.5-l thru 11.A.5-2................. Revision 8 R

10 I 1.A.6-1...................................... ev1s1on Chapter 12 12-i thru 12-ii................................ ev1s1on R..

2 12-1 thru 12-2............................... Revision 8 12.A-l........................................... Revision 2 R

8 12.A-2........................................... ev1s1on R..

2 12.B-1........................................... ev1s1on 12.B-2........................................... Revision 8 12.C-1 thru l 2.C-2........................ Revision 2 12.C.1-1........................................ Revision 8 12.C.2-l thru 12.C.2-3.................. Revision 8 12.C.3-1........................................ Revision 8 12.C.3-2 thru 12.C.3-3.................. ev1s1on R..

2 12.C.3-4........................................ Revision 8 12.C.3-5 thru 12.C.3-8.................. ev1s1on R

2 l 2.C.3-9 thru 12.C.3-20................ Revision 8

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NAC-MPC FSAR Docket No. 72-1025 List of Effective Pages (continued) 12.C.3-21...................................... Revision 5 12.C.3-22 thru l 2.C.3-23............. Revision 8 12.C.3-24...................................... Revision 5 12.C.3-25 thru 12.C.3-26............. Revision 8 12.C.3-27...................................... Revision 9 12.C.3-28 thru 12.C.3-29............. Revision 8 12.C.3-30 thru l 2.C.3-31........... Revision 12 12.C.3-32 thru 12.C.3-33............. Revision 8 12.C.3-34 thru 12.C.3-35............. Revision 5 12.C.3-36...................................... Revision 8 12.C.3-37...................................... Revision 5 12.C.3-38 thru 12.C.3-40............. Revision 8 l 2.C.3-41...................................... Revision 5 l 2.C.3-42...................................... Revision 8 12.C.3-43.................................... Revision 12 Chapter 13 13-i............................................... Revision 8 13.1-1 thru 13.1-2........................ Revision 8 13.2-1 thru 13.2-9........................ Revision 8 13.3-1........................................... Revision 8 Page 9 of 9 April 2019 Revision 12

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NAC-MPC-FSAR Docket No. 72-1025 April 2019 Revision 12 9.2 Maintenance Program The NAC-MPC storage system is a passive system. There are no active components or systems incorporated in the design. Consequently, there is a minimal amount of maintenance that is required over its lifetime.

The system has no valves, gaskets, rupture discs or seals, and there are no accessible penetrations. Consequently, there is no maintenance associated with these types of features.

The routine thermal performance surveillance requirements for a loaded NAC-MPC system are described in the Technical Specifications of Appendix A, LCO 3.1.6 of the Certificate of Compliance.

The continuing operability of the concrete cask is verified on a 24-hour frequency by completion of SR 3.1.6.1, which allows verification by visual inspection of the inlet and outlet vents for blockage, or verification by measurement of the air temperature difference between ambient and outlet average. If the operable status of the concrete cask is reduced, the concrete cask will be returned to an operable status as specified in LCO 3.1.6.

An annual inspection of the vertical concrete cask exterior is required, and includes:

Visual inspection of concrete surfaces for chipping, spalling or other surface defects. Any defects larger than one inch in diameter (or width) and deeper than one inch shall be re grouted, according to the grout manufacturer's recommendations.

Reapplication of corrosion-inhibiting (external) coatings on accessible surfaces.

9.2-1

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NAC-MPC FSAR Docket No. 72-1025 April 2019 Revision 12 9.A.3 Maintenance Program This section presents the maintenance requirements for the MPC-LACBWR system and the transfer cask.

9.A.3.1 MPC-LACBWR System Maintenance The MPC-LACBWR system is a passive system.

No active components or systems are incorporated in the design. Consequently, only a minimal amount of maintenance is required over its lifetime.

The MPC-LACBWR system has no valves, gaskets, rupture discs, seals, or accessible penetrations. Consequently, there is no maintenance associated with these types of features.

Annually, or on a frequency established by the user based on the environmental conditions at the ISFSI (i.e., higher inspection frequency may be appropriate at ISFSis exposed to marine environments, lower frequency for sites located in dry environments, etc.), a program of visual inspections and maintenance of the loaded MPC-LACBWR systems in service shall be implemented. The concrete cask(s) shall be inspected as described herein.

Visually inspect exterior concrete surfaces for chipping, spalling or other defects. Minor surface defects (i.e., approximately one cubic inch) shall be repaired by cleaning and re grouting.

Visually inspect accessible exterior coated carbon steel surfaces for loss of coating, corrosion or other damage. The repair of corroded surfaces or surfaces missing coating materials shall be done by cleaning the areas and reapplying corrosion-inhibiting coatings in accordance with the coating manufacturer's recommendations.

Exterior surface coatings authorized for use on the exposed carbon steel surfaces of concrete cask are not limited to those defined in Chapter 3 of the MPC FSAR or specified on the original design drawings. The user shall select coating appropri.ate to the ability to clean and recoat the affected surface areas.

Visually inspect the installed lid bolts for presence of external corrosion. Excessively corroded, or missing, bolting shall be replaced with approved spare parts.

Visually inspect the attachment hardware and the integrity of the inlet and outlet screens.

Damaged or missing components shall be repaired or replaced with approved spare parts.

9.A.3-1

NAC-MPC FSAR Docket No. 72-1025 April 2019 Revision 12 Visually inspect the inlet and outlet vents to verify they are unobstructed. Remove obstructions, as necessary, to clear the vents.

Significant damage or defects identified during the visual inspections that exceed routine maintenance shall be processed as nonconforming items.

The schedule, results and corrective actions taken during the performance of the MPC-LA CB WR system inspection and maintenance program shall be documented and retained as part of the system maintenance program.

9.A.3.2 Transfer Cask Maintenance The transfer cask trunnions and shield door assemblies shall be visually inspected for gross damage and proper function prior to each use.

Annually (or a period not exceeding 14 months), an inspection and testing program shall be performed on the transfer cask in accordance with the requirements of ANSI Nl4.6.

The following actions or alternatives shall be performed:

Visually inspect the lifting trunnions, shield doors and shield door rails for permanent deformation and cracking. Carbon steel-coated surfaces will be inspected for chipped, cracked or missing areas of coating, and repaired by reapplication of the approved coating(s) in accordance with the coating manufacturer's recommendations.

In addition, one of the following testing/inspection* methods shall be completed.

Perform a load test equal to or greater than 300% of the maximum service load and a post-test visual inspection of major load-bearing welds and critical components for defects, weld cracking, material displacement or permanent deformation; or If surface cleanliness and conditions permit, perform a dimensional and visual inspection of load-bearing components, and a nondestructive examination of major load-bearing welds.

9.A.3-2

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NAC-MPC FSAR Docket No. 72-1025 11.2.2.4 NAC-MPC Performance April 2019 Revision 12 This analysis shows that the design basis earthquake does not affect the NAC-MPC vertical concrete cask performance. The vertical concrete cask does not tip over for the design-basis earthquake having ground accelerations of 0.25g.

11.2.2.5 Recovery and/or Corrective Actions Response Surveillance of the storage casks at the ISFSI is required following an earthquake accident in accordance with the requirements specified in LCO 3.1.6 of the Technical Specifications to verify the heat removal systems of the casks are operable. While the cask does not tip over, there is a potential for movement of a cask relative to other casks and for superficial damage at the bottom edge due to that movement.

11.2.2-15

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NAC-MPC FSAR Docket No. 72-1025 11.2.3 Explosion November 2002 Revision 2 The flood analysis presented m Section 11.2.6 shows that the NAC-MPC system would not experience adverse effects due to a pressure of 22 psig applied to the canister. The vertical concrete cask will also be unaffected. This pressure is considered to bound any explosions occurring in the vicinity of the ISFSI.

11.2.3.l Cause of Accident An explosion is an unlikely event because administrative controls will exclude explosive substances in the vicinity of the ISFSI. No flammable or explosive substances are stored or used at the storage facility; therefore, an explosion affecting the site is extremely unlikely. This evaluation is provided in order to provide a bounding pressure that could be used in the event that the potential of an explosion must be considered at a given site.

11.2.3.2 Evaluation of the Explosion Event The NAC-MPC canister shell was evaluated in Section 11.2.6 for the effects of a flood having a depth of 50 feet. The water exerts an external hydrostatic pressure of 22 psig on the canister, which results in stress in the canister shell.

The concrete cask is a monolithic structure that is not affected by the explosion overpressure.

11.2.3.2.l Yankee-MPC Canister Stress Due to the Explosion Event The maximum primary membrane stress calculated in the canister is 8.82 ksi. The allowable stress for accident conditions is 40.08 ksi. The margin of safety for primary membrane stress is

+ 3.54.

The maximum primary membrane plus bending stress calculated in the canister is 19.18 ksi. The allowable primary membrane plus bending stress for accident conditions is 60.12 ksi.

The margin of safety for primary membrane plus bending stress is+ 2.13.

Consequently, there is no adverse consequence to the canister as a result of the 22 psig external pressure. This pressure conservatively bounds an explosion event.

11.2.3-1

NAC-MPC FSAR Docket No. 72-1025 11.2.3.2.2 CY-MPC Canister Stress Due to the Explosion Event April 2019 Revision 12 The maximum primary membrane stress calculated in the canister is 3.91 ksi. The allowable stress for accident conditions is 40.08 ksi. The margin of safety for primary membrane stress is

+9.26.

The maximum primary membrane plus bending stress calculated in the canister is 15.18 ksi. The allowable primary membrane plus bending stress for accident conditions is 60.12 ksi.

The margin of safety for primary membrane plus bending stress is +2.96.

Consequently, there is no adverse consequence to the canister as a result of the 22 psig external pressure. This pressure conservatively bounds an explosion event.

11.2.3.3 Radiological Consequences There are no radiological consequences for this accident.

11.2.3.4 NAC-MPC Performance This analysis shows that the NAC-MPC system performance is not affected by explosion over pressure.

11.2.3.5 Recovery and/or Corrective Actions Response Surveillance of the storage casks at the ISFSI in accordance with the requirements specified in LCO 3.1.6 of the Technical Specifications is required following an explosion event to verify the heat removal systems of the casks are operable.

11.2.3-2

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NAC-MPC FSAR Docket No. 72-1025 11.2.6.5 Recove1y and/or Corrective Actions April 2019 Revision 12 Response Surveillance of the NAC-MPC systems at the ISFSI shall be performed following the flood accident in accordance with the requirements specified in LCO 3.1.6 of the Technical Specifications to verify the heat removal systems of the casks are operable. Corrective actions will be taken, as required, to clear blockage of the inlet and outlet screens of each concrete cask.

11.2.6-9

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NAC-MPC FSAR Docket No. 72-1025 April 2019 Revision 12 Appendix 11.A ACCIDENT ANALYSIS-MPC-LACBWR MPC STORAGE SYSTEM FOR DAIRYLAND POWER COOPERATIVE LA CROSSE BOILING WATER REACTOR Table of Contents 11.A ACCIDENT ANALYSIS FOR THE MPC-LACBWR STORAGE SYSTEM................................................................................................................ 11.A-1 11.A. l Off-Normal Events for the MPC-LACBWR Storage System............................. 11.A.1-l 11.A.1.1 Blockage of Half of the Air Inlets................................................... 11.A. l-1 11.A.l.2 11.A.l.3 11.A.l.4 11.A. l.5 Canister Off-Normal Handling Load.............................................. 11.A. l-2 Failure of Instrumentation............................................................... 11.A. I-9 Severe Environmental Conditions (I 05°F and -40°F)..................... I I.A. I-9 Small Release of Radioactive Particulate from the Canister Exterior......................................................................................... I I.A.I-I I I I.A.2 Accident Conditions for the MPC-LACBWR Storage System........................... I I.A.2-1 I 1.A.2.1 Accident Pressurization.................................................................. 11.A.2-l 11.A.2.2 Earthquake Event............................................................................ l 1.A.2-3 l I.A.2.3 Explosion........................................................................................ I I.A.2-6 11.A.2.4 Failure of all Fuel Rods with a Subsequent Ground Level Breach of the Canister................................................................................. 1 l.A.2-6 11.A.2.5 Fire Accident................................................................................... 11.A.2-7 11.A.2.6 Flood............................................................................................. 11.A.2-I 2 11.A.2.7 Fresh Fuel Loading in Canister..................................................... l l.A.2-I4 11.A.2.8 Full Blockage of Air Inlets and Outlets........................................ I 1.A.2-I 5 11.A.2.9 Lightning....................................................................................... 11.A.2-17 11.A.2.10 Maximum Anticipated Heat Load (] 25°F Ambient Temperature)................................................................................. l l.A.2-17 11.A.2.11 Storage Cask 6-Inch Drop............................................................. 11.A.2-19 11.A.2.12 Tip-Over of the Concrete Cask..................................................... l 1.A.2-28 11.A.2.13 Tornado and Tornado-Driven Missiles......................................... 11.A.2-46 11.A.2.14 Transfer Cask Seismic Accident Condition.................................. 1 1.A.2-53 1 I.A-i

NAC-MPC FSAR Docket No. 72-1025 Table of Contents (continued) 11.A.3 Design Basis Loading of the MPC-LACBWR Transportable Storage January 2014 Revision 10 Canister................................................................................................................ 11.A.3-l 11.A.3. l Basket Support Disk Evaluation for the 30-ft Side Drop............... 11.A.3-l 11.A.3.2 Basket Top Weldment Evaluation for 30-ft Top End Drop............ l l.A.3-2 11.A.4 Evaluation of Site-Specific Fuel Components..................................................... 11.A.4-l 11.A.5 Canister Closure Weld Evaluation -Accident Conditions.................................. 11.A.5-l 11.A.6 References...............'............................................................................................. 11.A.6-l 11.A-ii

NAC-MPC FSAR Docket No. 72-1025 11.A.l.3 Failure oflnstrumentation April 2019 Revision 12 The MPC-LACBWR storage system may use a temperature-sensing system to take daily measurements of the outlet air temperature at each of the four outlets of the concrete cask in lieu of performing daily visual inspection of the concrete cask air inlet and outlet screens for obstructions. This section presents the evaluation of the MPC-LACBWR storage system for a potential failure of the temperature-sensing system. The cause, radiological consequences, and recovery actions for the event are the same as those described in MPC FSAR Sections 11.1.3.1, 11.1.3.3, and 11.1.3.5, respectively.

The analysis of the MPC-LACBWR storage system temperature-sensing system failure event is essentially the same as that of the Yankee-MPC storage system.

Failure of the temperature-sensing system does not have any adverse effects on the storage system. When the concrete cask air inlets are clear, no significant changes in the MPC-LACBWR storage system temperatures will occur during the time that it takes to indentify and correct the condition causing the failure of the temperature-sensing system. Furthermore, even under the worst-case fully blocked inlets and outlets accident condition evaluated in Section 11.A.2.8, the temperatures of the MPC-LACBWR storage system components do not reach or exceed their allowable temperature limits in 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. Therefore, the 24-hour inspection interval provides sufficient time to identify and correct the condition causing the temperature-sensing system failure.

11.A.l.4 Severe Environmental Conditions (105°F and -40°F)

This section evaluates the MPC-LACBWR storage system for the steady-state effects of high and low ambient temperature conditions.

11.A. l.4. l Cause of Event To bound the expected steady state temperatures of the canister and storage cask during severe ambient conditions, analyses were performed to calculate the steady state storage cask, canister, and fuel cladding temperatures for a 105°F ambient temperature and 24-hour average solar loads.

Similarly, winter weather analyses were performed for a -40°F ambient temperature with no solar load. A bounding heat load of 4.5 kW is conservatively used for the MPC-LACBWR storage system thermal analyses.

11.A.l-9

NAC-MPC FSAR Docket No. 72-1025 11.A.l.4.2 Analysis of the Off-Normal Ambient Temperature Event December 2010 Revision 8 Off-normal temperature conditions are evaluated using the thermal models described in Section 4.A.3.1.1. This evaluation shows that the component temperatures are within the allowable values for the off-normal ambient conditions. The principal component temperatures for each of these ambient temperature conditions are summarized as follows:

MPC-LACBWR Maximum Temperature (°F)

Allowable Component 105°F Ambient

-40°F Ambient Temperature (°F)

Fuel Cladding 459 377 806 Support Disks 454 370 800 Heat Transfer Disks 452 368 700 Canister Shell 365 280 800 Concrete(!)

196 5

350

1. Concrete temperature is from Table 4.1-4 for NAC-MPC with a heat load of 12.5 kW.

The thermal stress evaluation for the MPC-LACBWR concrete cask for these off-normal conditions is bounded by that for the accident condition with 125°F ambient temperature (Section 11.2.10), since the heat load for MPC-LACBWR is much lower than the heat load for NAC-MPC and the accident condition has the maximum temperature gradient through the storage cask concrete wall.

The thermal stresses for the MPC-LACBWR canister,,the support disks and weldments are classified as secondary stress in accordance with the ASME Code, which need not be evaluated for off-normal and accident conditions.

11.A. l.4.3 Radiological Consequences There are no radiological consequences for this off-normal event.

11.A. l.4.4 MPC-LACBWR Performance There are no adverse consequences for this off-normal condition. The maximum component temperatures are within the allowable temperature values. The materials used are not subject to low temperature brittle fracture.

ll.A.1-10

NAC-MPC FSAR Docket No. 72-1025 December 2010 Revision 8 C 3.1 CONCRETE CASK Heat Removal Rate C 3.1.6 NAC-MPC SYSTEM Integrity C 3.1.6 BASES CONCRETE CASK Heat Removal System BACKGROUND APPLICABLE SAFETY ANAL YSJS The CONCRETE CASK Heat Removal System is a passive, air-cooled convective heat transfer system, which ensures that heat from the CANISTER is transferred to the environment by the upward flow of air through the CONCRETE CASK. Relatively cool air is drawn into the annulus between the CONCRETE CASK and the CANISTER through the four air inlets at the bottom of the CONCRETE CASK.

The CANISTER transfers its heat from the CANISTER surface to the air via natural convection. The buoyancy created by the heating of the air creates a chimney effect and the air flows back into the environment through the four air outlets at the top of the CONCRETE CASK.

The thermal analyses of the CONCRETE CASK take credit for the decay heat from the spent fuel assemblies being ultimately transferred to the ambient environment surrounding the CONCRETE CASK.

Transfer of heat away from the fuel assemblies ensures that the fuel cladding and CANISTER component temperatures do not exceed applicable limits. Under normal storage conditions, the four air inlets and four air outlets are unobstructed and full air flow (i.e., maximum heat transfer for the given ambient temperature) occurs.

Analyses have been performed for the complete obstruction of all of the air inlets and outlets.

The complete blockage of all air inlets and outlets stops air cooling of the CANISTER.

The CANISTER will continue to radiate heat to the relatively cooler inner shell of the CONCRETE CASK. With the loss of air cooling, the CANISTER component temperatures will increase toward their respective short-term temperature limits. The limiting component is the CANISTER basket support and heat transfer disks, which, by analysis, approach their temperature limits in 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> for Yankee-MPC and CY-MPC systems, if no action is taken to restore air flow to the heat removal system.

The MPC-LACBWR analysis for all inlets and outlets blocked shows system temperatures remain below long-term limits for the 4.5 kW total heat load.

Thermal performance of the MPC-LACBWR system is provided by radiation between the CANISTER and CONCRETE CASK, and air cooling convection heat transfer is not required to maintain system safety limits.

( continued) 12.C.3-29

NAC-MPC FSAR Docket No. 72-1025 LCO APPLICABILITY ACTIONS April 2019 Revision 12 CONCRETE CASK Heat Removal Rate C3.l.6 The CONCRETE CASK Heat Removal System must be verified to be OPERABLE for Yankee-MPC and CY-MPC systems to preserve the assumptions of the thermal analyses. Operability of the heat removal system ensures that the decay heat generated by the stored fuel assemblies is transferred to the environment at a sufficient rate to maintain fuel cladding and CANISTER component temperatures within design limits for the Yankee-MPC and CY-MPC systems.

The LCO is applicable during STORAGE OPERATIONS.

Once a CONCRETE CASK containing a CANISTER loaded with spent fuel has been placed in storage, the heat removal system must be OPERABLE to ensure adequate heat transfer of the decay heat away from the fuel assemblies for the Y ankee-MPC and CY-MPC systems.

A note has been added to ACTIONS that states for this LCO, separate Condition entry is allowed for each CONCRETE CASK.

This is acceptable since the Required Actions for each Condition provide appropriate compensatory measures for each CONCRETE CASK not meeting the LCO. Subsequent CONCRETE CASKs that do not meet the LCO are governed by subsequent Condition entry and application of associated Required Actions. The note also specifies that this LCO is not applicable to the MPC-LACBWR CANISTER since convective cooling is not required to maintain system safety limits.

If the CONCRETE CASK heat removal system has been determined to be inoperable, actions shall be taken immediately to ensure adequate heat removal is occurring in order to prevent the limiting CONCRETE CASK component temperatures do not exceed their short term allowable limits. Immediately, defined as the required action to be pursued without delay and in a controlled manner, provides a reasonable period of time (i.e., within the design basis time limit as presented in Section 11.2.8 or within the time limit for a Jess than design basis heat load case, as evaluated) to take action to remove the obstructions in the air flow path.

AND A.2 If the CONCRETE CASK heat removal system has been determined to be not OPERABLE, it must be restored to a fully OPERABLE status within 25 days.

( continued) 12.C.3-30

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NAC-MPC FSAR Docket No. 72-1025 ACTIONS

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SURVEILLANCE REQUIREMENTS April 2019 Revision 12 CONCRETE CASK Heat Removal Rate C 3.1.6 If Required Action A.1 or A.2 cannot be met, an engineering evaluation is performed to verify that the CONCRETE CASK heat removal system is OPERABLE. The Completion Time for this Required Action of 5 days will ensure that the CANISTER remains in a safe, analyzed condition.

Place the affected NAC-MPC SYSTEM in a safe condition.

The Completion Time for this Required Action of 5 days will ensure that the NAC-MPC SYSTEM is maintained in a safe condition.

SR 3.1.6.1 The long-term integrity of the stored fuel is dependent on the ability of the CONCRETE CASK to reject heat from the CANISTER to the environment.

Visual observation that all four air inlet and outlet screens are unobstructed and intact ensures that air flow past the CANISTER is occurring and heat transfer is taking place. Complete blockage of more than two air inlet or outlet screens or the equivalent effective screen area renders the heat removal system not OPERABLE and this LCO is not met. Partial blockage of less than two air inlet or outlet screens or the equivalent effective screen area does not result in the heat removal system being not OPERABLE. However, corrective actions should be taken promptly to remove the obstruction and restore full flow through the affected air inlet and outlet screens. Alternatively, based on the thermal analyses, if the air temperature rise is less than the limits stated in the SR, adequate air flow and, therefore, adequate heat transfer is occurring to provide assurance of long-term fuel cladding integrity.

The reference ambient temperature used to perform this Surveillance shall be measured at the ISFSI facility.

The Frequency of 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> is reasonable based on the time necessary for CONCRETE CASK and CANISTER components to heat up to unacceptable temperatures assuming design basis heat loads, and allowing for corrective actions to take place upon discovery of the blockage of the air inlet and outlet screens. A note has been added to this SR specifying it is not applicable to the MPC-LACBWR CANISTER since convective cooling is not required to maintain system safety limits.

( continued) 12.C.3-31

NAC-MPC FSAR Docket No. 72-1025 REFERENCES December 2010 Revision 8 CONCRETE CASK Heat Removal Rate C 3.1.6

1.

FSAR Chapter 4, Appendix 4.A and Chapter 11, Section 11.1.1, Section 11.2.8 and Appendix 11.A.

12.C.3-32

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NAC-MPC FSAR Docket No. 72-1025 SURVEILLANCE REQUIREMENTS REFERENCES SR 3.2.2.l April 2019 Revision 12 CONCRETE CASK Average Surface Dose Rates C 3.2.2 This SR ensures that the CONCRETE CASK average surface dose rates are within the LCO limits prior to STORAGE OPERATIONS.

This Frequency is acceptable as corrective actions can be taken before off-site dose limits are compromised.

The surface dose rates are measured approximately at the locations indicated on Figure A.3-1, following standard industry practices for determining average surface dose rates for large containers.

1.

10 CFR Parts 20 and 72.

2.

FSAR Sections 5.1, 5.A.l, 8.2 and 8.A.2.

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