L-2019-045, NextEra Energy Duane Arnold, Ilc - Independent Spent Fuel Storage Installation (ISFSI) - Decommissioning Funding Status Reports, Financial Assurance Update

NextEra Energy Duane Arnold, Ilc - Independent Spent Fuel Storage Installation (ISFSI) - Decommissioning Funding Status Reports, Financial Assurance Update

ML19088A148
Person / Time
Site:	Duane Arnold
Issue date:	03/25/2019
From:	Parks W Florida Power & Light Co
To:	Document Control Desk, Office of Nuclear Material Safety and Safeguards, Office of Nuclear Reactor Regulation
References
L-2019-045
Download: ML19088A148 (70)

Text

L-2019-045 MAR 2 52019 10 CFR 50.75(£)(1) 10 CFR 72.30(c)

Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555-0001 RE: N extEra Energy Duane Arnold, ILC Duane Arnold Energy Center Docket No. 50-331 Docket No. 72-32 Decommissioning Funding Status Reports / Independent Spent Fuel Storage Installation (ISFSI)

Financial Assurance Update Pursuant to 10 CFR 50.75(£)(1) and 10 CFR 72.30(c), enclosed are the Decommissioning Funding Status (DFS) Report and Independent Spent Fuel Storage Installation Financial Assurance Update for Duane Arnold.

NextEra Energy Duane Arnold, lLC (NextEra), Central Iowa Power Cooperative, and Com Belt Power Cooperative own the Duane Arnold Energy Center. The report for Duane Arnold Energy Center provides the status of decommissioning funding for all three owners.

This letter contains no new commitments and no revisions to existing commitments.

Should there be any questions, please contact Steve Catron at (561) 304-6206.

fr/~~

William Parks Nuclear Licensing and Regulatory Compliance Director Enclosures (2)

!f P IJ I A)lvf55 7.-0

t)I- (L_

Florida Power & Light Company Nfvf 5 5 700 Universe Boulevard, Juno Beach, FL 33408

Enclosure 1 Decommissioning Funding Status Reports 10 CFR 50.75(f)(1)

Duane Arnold Energy Center

Duane Arnold Energy Center NextEra Energy Duane Arnold, LLC (NextEra),

Central Iowa Power Cooperative (CIPCO),

Corn Belt Power Cooperative (Corn Belt)

Decommissioning Funding Status Report

1. Duane Arnold E;nergy Center has performed a site specific decommissioning cost study that has estimated license termination costs of $740,099,000 (2018 dollars) which is higher than the minimum decommissioning fund estimate pursuant to 10 CFR 50.75(b) and (c) of $612,367,058. *

2. The amount accumulated at the end of the calendar year preceding the date of the report. (Trust fund balances are net of taxes)

Plant Owner(% Ownership) Total NextEra (70%) 377,863,154 CIPCO (20%) 62,355,498 Corn Belt (10%) 31,610,394 Total 471,829,046

3. Refer to Attachment 1 for Decommissioning Funding Plan, SAFSTOR Alternative and Attachment 2 for a License Termination Site Specific Decommissioning Cost Estimate for Duane Arnold.

4. Assumptions used regarding escalation in decommissioning costs, rate of earnings on decommissioning funds and rates of other factors used in funding

. fions.

proJec Plant Owner(% Ownership) Real Rate of Return NextEra (see note (c)) (70%) 2%

CIPCO (see note (d)) (20%) 4%

Corn Belt (see note (e)) (10%) 4%

Basis for Allowance:

(c) 10 CFR 50.75 allows licensees to assume up to a 2% real rate of return unless the licensee's rate-setting authority has specifically authorized a higher rate.

Page 11

Duane Arnold Energy Center NextEra Energy Duane Arnold, LLC (NextEra),

Central Iowa Power Cooperative (CIPCO),

Corn Belt Power Cooperative (Corn Belt)

Decommissioning Funding Status Report (d) Central Iowa Power Cooperative (CIPCO) is a public corporation incorporated under Chapter 499 Iowa Code (2009). CIPCO has the authority and is required to fix, establish, and collect adequate rates and other charges for electrical energy or services sold or furnished by it. CIPCO is accordingly authorized to establish its own rates and other charges through which it can recover its cost of service.

CIPCO is governed by a 13 member Board of Directors that are elected by the CIPCO members.* The Board of Directors is the rate making authority for CIPCO.

CIPCO rates are not regulated by any state or federal authority. In a Board Resolution dated October 27, 2009, the CIPCO Board of Directors resolved that the

, rates and other charges for electrical energy services and the decommissioning fund be established assuming a real rate of return on the decommissioning fund of four percent.

(e) Corn Belt Power Cooperative is a public corporation incorporated under Chapter 499 Iowa Code (2009). Corn Belt has the authority and is required to fix, establish, and collect adequate rates and other charges for electrical energy or services sold or furnished by it. Corn Belt is governed by an 11 member Board of Directors who are elected by its members. The Corn Belt Board of Directors is accordingly authorized to establishits own rates and other charges through which it can recover its cost of service and is the rate making authority for the Cooperative. The Cooperative's rates are not regulated by any state or federal authority. In a Board Resolution dated May 2, 2014, the Corn Belt Board of Directors resolved that the rates and other charges for electrical energy services and the decommissioning fund be established assuming a real rate of return on the decommissioning fund of four percent.

5. Any contracts upon which the licensee is relying pursuant to 10 CFR 50.75(e)(1)(v). None

6. Any modifications to a licensee's method of providing financial assurance occurring since the last submitted report. None

7. Any material changes to trust agreements.

None Page 12

CIPCO Corn Belt NextEra Decommissioning Decommissioning Decommissioning Trust Fund Balance Trust Fund Balance Trust Fund Balance escalated at 4% escalated at4%

escalated at 2% minus 20% of minus 10% of Total Decommisioning minus 70% of expenses+ expenses+ Trust Fund minus Year 2018 Cost expenses Contributions Contributions expenses 1------+----------~-------+--------+---- -----+----~------1,-*-**-* ..--,-~****- *~*-*** - -.. ~-*!

2018 377 863 62,355 31,610 471,829 479 046

- -* - - *- -I 2019 4 099 382,551 64,030 +-----=---'--=---+----~----'-'--=-'-"--l--------------->

32,465 f----="-'----1------'-'-"--'-'-+-----~~----+------------'--'---"--"

2020 29127 369,814 60,766 30,851 461 431 l-----:---:---+-----~-------~------~------~-- ------~---1-------*--*******-**-**-*---~

2021 _ 61198 334 372 411,294 50,957 '--+---------'-~--i---*--------------,**----1 25 965 f---"-~~-------'-~'--+------~-=-+-----~~-----=~

2022 24100 324 189 24,594 396,958 48175 =---'--'-"-"--1------..C..C.-'--'-"-~-l------------------ j f----=='---t------=-'-'-'--'-'-+------~----+-----'--"--'-'--'--"+-----

2023 4,969 327,195 49,109 25,081 401,384 f------1-----~--------'-----t--------'--+---- ------'--t---------'---l------

2024 9,600 327,019 49,153 25,124 401,296

""*---~-*--*-!

f----="-=--'---l-----"-=-'-'-+-----~~----+-----'--"--'-'---'--"+ -----=-'=-1-------'-"--'-=--l--*--*-*------*******-****-:

2025 17,270 321,470 47,665 24,402 393,537 f------1-------'--+-------'-----t--------'--+----- -----'--l-----'-------'---l*****-*

2026 2,201 326,359 49,131 25,158 400 648 2027 1,827 331,607 50,731 25,981 408,319 -----

1-------+-----~--------'-------+-----~ ------~--------~--1---

2028 1,827 336,960 52,395 26,838 416,193 f------1-------'--t------~------~------~- --------'---l*------------------**** -------!

2029 1,827 342,420 54,125 ----"-'---='--+---------=~--l---*

27,729 424,274 .

f----=~--1------'-'--"~t-----'---'-------+---------'~=-

2030 1,884 347,949 55,913 28,649 432,512 2031 1,770 353 670 ---~--+-----~---+-------~-s-----,-----**--******-**~

57,796 29,618 441 084 ~J 2032 1,770 359,504 59,754 30,626 449,884 '

f---"----'-'---l-----'-'-'-'--+-------'-----+--------'--+-------- '--1---------'---'---l---------*-*-----***************-1 2033 1,770 365,455 61,790 31,674 458,920 2034 1,770 371,525 . 63,908 32,764 468,197

.*1 f------1-------'--t-----=:-::---:=-+-----=-=-----:+ ------=cc'-:-+---------'---;--- -------------* ... --- ------'

2035 1,770 377,717 66,110 33,898 477,725 1-------+-------'--i-----------+--------+ ---------+---------'----I 2036 1,770 384,033 68,401 35,077 487,510

--- -*i

2037 1,770 390,474 70,783 36,303 497,560 f------1-------'--+------~--=--+-----,--,--',-+ ----------'--1---------'---l*- --*----*****-*---***-***--** :

2038 1,770 397,045 73,260 37,578 507,883 2039 1,770 403,747 75,836 38,904 518,487 1-------+-------'--i-----------+--------+----- ----+---------'--S-------------**-***** (

2040 2,411 410,134 78,388 40,219 528,740 2041 1,770 417,098 81,169 41,651 539,918 f-----+------'---f-----,-,--,-'c---+-----~'- +----'-+-------------1-*:- - ---- ----~

2042 1,770 424,201 84,062. _ 43,140 551,402 t------+------'--+---------:c'-7--:---i-----= '--+------'---+------~--1-----------l 431,446 87,070 44,689 2043 2044 1,770 t------+------'--+----------:----+-----:-:-'----:+---- ---,-,---,-,--+------~--1------------------

1,770 438,836 90,199 46,299 563,205 575,334

!

---

--1 2045 1,770 446,374 93,453 47,974 587,801 f-----'-'----t-------'-'-'--'--+--------'-------1---

600,616 2046 2047 1,770 1,770 454,062 461,905 96,837 100,357 49,716 51,528 613,789 i 2048, 1,770 469,904 104,017 53,412 627 333 I 2049 1,770 478,063 55,371 641,258 107,824 -+------~--1------------------------------1 t--'--'----+----~'--+--------'-------t-----~------~~

2050 1,770 486,385 57,409 655,577 111,783 +-------"--'--'--"-"-+--------=.c.,.c--l***--*--

t-----=.C.C.C'----t-------'-'-'--'--"-+-------'-'--'-'---'----+-------'-'--'-'-'-= ***---******-**'

2051 1,770 494,874 115,900 59,529 670,303 1-------+-------'--+--------------~---- --~'----+-------~--1----------.J 2052 1,770 503,533 120,182 61,733

---

'-'---+------~--;------

685,448

-

__ .J t------+----~-+--------'-------t-----~-----

2053 1,770 512,364. 124,636 64,025 701,025  !

2054 2,065 521,166' 129,208 66,380 716,754 2055 2,116 530,108 68,823 133,953 -~'---+-------~---1------ 732,884 1-------+-------'--+--------------~----- 749 828 -----*

• ----~----*****-******i 2056 1 770 539 471 138,957 -~~--------:--:-:-:::-'-:""C""C"""i*

71 399 I t------,---+----~-+------::-:-:-'-:--:---t-------,-~----,-1---- ---,

2057 1 770 549,022 74,078 144,162 ~~-----~~-+------~--1--**-------- 767 262 }

t--~---'--+----~~+------'---'-----=-t----'--

2058 1,770 558,764 76,864 149,574 ------'--"'~-+-----~~=---i---------- 785 202 t-----=~----'--t-------'"'-'--"-+------~~--'--1-------'-~~

2059 2159 568 427 155,125 79 723 803,275 2060 3,077 577,642 160,715 82,604

'-=+------'-="'--'--'--1----__.::;=;::_:_+---------'=.c.=.c..+- 820 960 --- --~--*---~

2061 2 634 587 351 85,645 839 612 166 616 ~-----=c:....:..-+-------=...c-=-==--,-... - ... ....................... )

t----=~----'---1--------'=;::_:_+------=-=-'-"-'----+------'-':..::..C 2062 2,634 1------+-------'--+-----------1-----~--

2063 2 634 597,254 607,356 179,138 88,807 172 754 ----~'---+-------~-- 92 096 858 816 -***

878 590

• • • -***** ~-----!

=-+------c'=c::-t-----~---------:-:-:-..,...,,.,:-1*-*-*- ---**-----.l 2064 2,634 617,659 185,777 95,517 898,953  !

2065 2,634 628,169 192,681 -99,074 -* 919,924 2066 2,634 638,889 199,861 102,773

---

'-"=CC..C.-+-----~~~-1----- 941 524 t-----=.C.C.C----'--t---------'="-'-+------~~----+------'-'~~

2067 2068 2069 2,634 2,634 2,634 649,823 t-----==-=----1--------'=;::_:_+------~--'-==---i------='-'--"=.c+----

660,976 672,352 215,096 223,173 110,623 114,784 963,774 207,329 ---'--=--=-c=-'-+--------=-"-"'--'-'-1*--**-*

106,621 986,694 1,010,309

- - -I

---

*--1 2070 2,634 683,956 231,573 119,112 1,034,641 2071 2,634 695,791 240,309 123,613 1,059,714

- - - - - + - -2,634 1 -2072 2073

--~-.---

15,319

- ~ - - + - -249,395 707,864 711,298

--~----~

256,307

- . 1 - - - - - 1,085,553 128,294 131,894

~ ~ -... -~.

1,099,499

~i"'!9eTJ 2074 32_572 702_723 260_045 133_913 1 _096_681

A B C D E F CIPCO Corn Belt NextEra Decommissioning Decommissioning Decommissioning Trust Fund Balance Trust Fund Balance Trust Fund Balance escalated at 4% escalated at4%

escalated at 2% minus20% of minus 10% of Total Decommisioning minus 70% of expenses+* expenses+ Trust Fund minus Year 2018 Cost expenses Contributions Contributions expenses - - - * - - - * ~;

2068 2,634 660,976 1---=~'----+----~~+------~--1-----~---+-----~-.,-+------,-...,.9..,.86~,~6.,..94-t**********--"-*--"--***-* 215,096 110,623 2069 2,634 672,352 223,173 1---=-~--+-----=CC..C..-+----...C..C..=-'-=-1------=~~----~~'-'-l-----1~,0_1_0~,3_09-t**-********-*--*-******-*-**-**** 114,784 2070 2,634 683,956 231,573 1---=:..:....::--1------=CC..C..-+------'-'-==-1------=-'--'-"-'-'-+----~"-'-'--'=-!----~1~,0-'-3-'-4=,6-'-41-'-+-------***---- 119,112 2071 2,634 695 791 240,309 t---=::..C..C--f------===--+-----=-=.i.:...=-1------==-=..c..+-----=-=~----~1-'-',0CC5..C.9"-,7-'-14-'-1*-**-*- 123,613 ---*-*- ******

2072 2,634 707,864 249,395 128,294 1,085,553 2073 15,319 711,298 1---==-'----+----=~~+-----~~-----~~-+-----~-.,-+------1,~0_99~*~4.,..99-t*--*-~=---~ 256,307 131,894 2074 32,572 702,723 260,045 1---==-'----+----"-='-'-'-=-+-----'-=~--1----~~~+----~~~c..+------=1~0_96~*~6_81-t*-**-****-**-***---*-****--*-j 133,913 2075 75,626 663,839 255,321 1---=:..:....::--f------'--"-=::..+-----=-==-1------===.c..+------'-"--'-"-c..c....i----~1-'-C,OCC5..C.0=,8~67-t****-**---****-.. 131 707 ****---i 2076 88,570 615117 247 820 128,118 1--=::..:....::-+ _ _ _.=;c::..:..;=+----..::...:_::..i..:...:...:.._1-----=-'=-'=-f------=-::..L.:..-=-j------'~CC~-'-~'-'-:~-==-::"--j**-******-----**1 2077 117,141 545,421 234,305 121,529 2078 101,050 485,594 223,467 t---="-'-----+----'-"--'-'-"-=-=-+------'--=-'CLC...C--1-----=='-'-"'-+----~-'-'-'-==-c..+-------'-8=25~34-'-6-t_-:**--*****-* 116,285 _____ .. - *1 2079 57,385 455,137 1-------1----~---+------~---------,-~--+----..,...,.~...,..,.;--------:7-:9-::-1~,2...,,6.,,3., 220,929 115,198 ..... **-*******-**-- -* _j.

1-- 2080

- = ~ - - - -4,828 ~~----~~-- - - - = ~ - - - ; - -228,800 460,860 -~~~-1---- 119,323

- - 8 0 _ 8 ~ , 9 _ 8 - - , 3 .. **************--*-***-**-!

Total 740,099 f--~-------~'----f-----------------f---------c---------~---*--*--------*------** *--, _l I i  ! i I '  ! I t:::::~,i~a c*(Pre~~"tfu;d ,,.::::t~))-(Coloma ~:1;;;;:=~~~~L deoomm;~;oa;e, .,,.,t;wres) . *-** -* --* j J-g~l1J_ri,r1_g_'::_{(2_~_f!l.!1_Q__(l:!.e.~1:>us )'_e_f!t§__flJ_r19._!?.~lc1r.iE~)..x_(_1_-:Q,Qi))_:-JQ~!~_ri,_ri_l:!_~.9s?.92..(?.Q.~~f-~l!£~!!!.¥~-c1.~-~~£0_r11_ri,_i~~i~ni_ri\L':...XJ?.~n_d_~_LJr~_st________________ ..

IColumn E = (Column E (Previous year's fund balance)~0.04)) _- (Column B x0.10)(10% of current year's decommissioning expe~ditures) _______ _

Column F = Column C + Column D + Column E  : I  : i Ir. -- r . *_. - . ---f.*--* -.--_+** . - * --.. -J _--_-*-. . _/- -*-- _*_ -_* - _ )-- ---- _-- * -_ ~

Page 14

Enclosure 2 Independent Spent Fuel Storage Installation (ISFSI)

Decommissioning Financial Assurance Update 10 CFR 72.30(c)

Page 11

ISFSI Decommissioning Financial Assurance Update 10 CFR 72.30(c) .

The Duane Arnold Energy Center has included a site-specific decommissioning cost estimate

• which identifies the ISFSI decommissioning cost estimate in 2018 dollars, The following table summarizes the current trust balance, projected fund balance remaining after decommissioning and ISFSI decommissioning cost estimate.

Projected Trust Fund Balance ISFSI Trust Balance Remaining After Decommissioning as of 12/31/18 Decommissioning Cost Estimate Site ($Thousands) ($Thousands) ($Thousands)

Duane Arnold - NextEra 377,863 460,860 1,148 Duane Arnold - Corn Belt 31,610 228,800 164 Duane Arnold - CIPCO 62,355 119,323 328 The following table supplements the current ISFSI decommissioning funding plan to address new information that may affect the previously submitted reports in accordance with 1O CFR 72.30(c)(1-4).

• Duane Arnold (NextEra Energy Duane Arnold, LLC)

Spills of radioactive material producing additional residual radioactivity in onsite subsurface material None Facility modifications None Changes in authorized possession limits None Actual remediation costs that exceed previous cost estimate None Page 12

Attachment 2 Duane Arnold License Termination Site Specific Decommissioning Cost Estimate

~

ENERGYSOLUTIONS Document No.164053-DCE-025 2018 License Termination and ISFSI D&D Cost Estimate-for the Duane Arnold Energy Center Project No. 164053 Revision 0 Prepared for:

NextEra Energy Duane Arnold, LLC Central Iowa Power Cooperative Corn Belt Power Cooperative Prepared by:

EnergySolutions, LLC 121 W. Trade Street, Suite 2700 Charlotte, NC 28202 Approved By: March 15, 2019 Mike Williams, Project Manager Date Prepared By:

/3; /.)~ March 15, 2019 Barry Sims, Senior Technical Advisor Date 00 New Report D Title Change/

D Report Revision D Report Rewrite Effective Date March 15, 2019

2018 License Termination and ISFSI D&D Cost Document No. 164053-DCE-025 Estimate for the Duane Arnold Energy Center Revision 0 TABLE OF CONTENTS Section Page 1.0 EXECUTIVE

SUMMARY

................................................................................................ 1 2.0 IN"TRODUCTION .............................................................................................................. 4 2.1 Study Objective ....................................................................................................... 4 2.2 Regulatory Framework ........................................................................................... 4 3.0 STUDY METHODOLOGY ............................................................................................... 7 3.1 General Description ................................................................................................ 7 3.2 Schedule Analysis ................................................................................................... 7 3.3 Decommissioning Staff........................................................................................... 8 3.4 Waste Disposal........................................................................................................ 8 3.5 Final Status Survey ............................................................................................... 10 3.6 Contingency .......................................................................................................... 11 3.7 Co~t Reporting ................ :..................................................................................... 12 4.0 SITE SPECIFIC TECHNICAL APPROACH .................................................................. 13 4.1 Facility Description ............................................................................................... 13 4.2 Decommissioning Periods for SAFSTOR ............................................................ 13 4.3 Decommissioning Staff......................................................................................... 15 4.4 Spent Fuel Shipments ........................................................................................... 15 5.0 BASES OF ESTIMATE AND KEY ASSUMPTIONS ................................................... 16 6.0 STUDY RESULTS ........................................................................................................... 20 6.1

• SAFSTOR, 2030 DOE Acceptance, Dry Fuel Storage ......................................... 20 7 .0 REFERENCES ................................................................................................................. 26 FIGURES Figure 1-1 Summary SAFSTOR Schedule ............................................................................. 3 Figure 6-1 Summary SAFSTOR Schedule ........................................................................... 21

2018 License Termination and ISFSI D&D Cost Document No. 164053-DCE-025 Estimate for the Duane Arnold Energy Center Revision 0 TABLES Table i-1 Decommissioning Cost Summary ...................... ............. l ....................................... 2 Table 6-1 Cost and Schedule Summary ................................................................................ .22 Table 6-2 Utility Staff Levels ............................................................................................ 23 Table 6-3 Decommissioning General Contractor Staff Levels ............................................. .24 Table 6-4 Waste Disposal Volumes ....................................................................................... 25 APPENDICES Appendix A List of Systems and Structures AppendixB Spent Fuel Shipping Schedule Appendix C Detailed Project Schedule Appendix D Detailed Cost Table AppendixE Annual Cost By Account Table ii

2018 License Termination and ISFSI D&D Cost Document No. 164053-DCE-025 Estimate for the Duane Arnold Energy Center RevisionO ACRONYMS AND ABBREVIATIONS AIF Atomic Industrial Forum ALARA As Low As Reasonably Achievable BWR Boiling Water Reactor CFR Code of Federal Regulations CPM Critical Path Method DAEC Duane Arnold Energy Center D&D Decontamination and Demolition DGC Decommissioning General Contractor DOE U.S. Department of Energy DSC Dry Shielded Canister FEMA Federal Emernency Management Agency PSS Final Status Survey GSA U.S. General Services Administration GTCC Greater Than Class C HP Health Physics HSM Horizontal Storage Modules ISFSI Independent Spent Fuel Storage Installation LLRW Low-Level Radioactive Waste LLW Low Level Waste LLWPA Low-Level Waste Policy Act LOP Life-of-Plant MARSSIM Multi-Agency Radiation Survey and Site Investigation Manual MPC Multi-Purpose Canister MWt Megawatt thermal NRC Nuclear Regulatory Commission NSSS Nuclear Steam Supply System ORISE Oak Ridge Institute for Science and Education PCB Polychlorinated Biphenyl PSDAR Post-Shutdown Decommissioning Activities Report RCRA Resource Conservation and Recovery Act TCEQ Texas Commission on Environmental Quality WBS Work Breakdown Structure UCF Unit Cost Factor iii

2018 License Termination and ISFSI D&D Cost Document No.164053-DCE-025 Estimate for the Duane Arnold Energy Center Revision 0 1.0 EXECUTIVE

SUMMARY

This report presents the costs for (1) decommissioning Duane Arnold Energy Center (DAEC) to the extent required to terminate the plant's operating license pursuant to 10 Code of Federal Regulations (CPR) 50.75(c), and (2) Independent Spent Fuel Storage Installation (ISFSI)

Decontamination and Demolition (D&D) pursuant to 10 CPR 72.30.

DAEC is 70% owned by NextEra Energy Duane Arnold, LLC. The other owners of DAEC are Central Iowa Power Cooperative (20%) and Corn Belt Power Cooperative (10% ). All numbers presented in this report are on a 100% basis.

The estimate methodology follows the basic approach originally presented in the Atomic Industrial Forum/National Environmental Studies Project Report AIF/NESP-036, "Guidelines for Producing Commercial Nuclear Power Plant Decommissioning Cost Estimates," (Ref. No.

1). The report was prepared in accordance with Nuclear Regulatory Commission (NRC)

Regulatory Guide 1.202, "Standard Format and Content of Decommissioning Cost Estimates for Nuclear Power Reactors," (Ref. No. 2). The estimate is based on compliance with current regulatory requirements and proven decommissioning technologies.

NRC requirements, set forth in Title 10 of the CPR, differentiate between the post-shutdown costs associated with storage of spent fuel on site and those associated with the decommissioning of the facility. 10 CPR 50.75(c) requires funding by the licensee of the facility for the decommissioning program, but specifically excludes the cost of removal and disposal of spent fuel and the removal of clean structures. 10 CPR 50.75(c) also excludes the cost of site restoration activities that do not involve the removal of residual radioactivity necessary to terminate the NRC license, which restores the site to either "Brownfield" or "Greenfield" conditions depending on the desired end-state. 10 CPR 50.54 (bb) requires funding by the licensee "for the management of all irradiated fuel at the reactor upon expiration of the reactor operating .license until title to the irradiated fuel and possession of the fuel is transferred to the Secretary of Energy for its ultimate disposal in a repository."

This DCE analyzes the following scenario, as defined by DAEC:

60 Year SAFSTOR, 2030 DOE Acceptance, Dry Fuel Storage

• Shutdown on October 30, 2020.

• DAEC's spent fuel shipping schedules based on a 2030 start date for DOE's acceptance of spent fuel.

• Termination of spent fuel pool operation approximately four years after permanent shutdown.

• Following shutdown Phase II and III of the ISFSI will be constructed and all spent fuel will be transferred to Multi-Purpose Canisters (MPCs) for interim storage.

• SAFSTOR methodology, with decommissioning completed within 60 years of shutdown.

• Decommissioning will be performed by the utility staff and a Decommissioning General Contractor (DGC).

1

2018 License Termination and ISFSI D&D Cost Document No. 164053-DCE-025 Estimate for the Duane Arnold Energy Center Revision 0 The cost estimate results are provided in 2018 dollars in Table 1-1. Table 1-1 gives License Termination costs (which correspond to 10 CFR 50.75 (c) requirements) and ISFSI D&D (which correspond to 10 CPR 72.30).

Table 1-1 Decommissioning Cost Summary (2018 Dollars in Thousands)

License Termination~ 50.75 (c) $740,099 ISFSI D&D 72.30 $1,640 Total $741,739 Note: Numbers may not add due to rounding.

The estimate is based on site-specific plant systems and buildings inventories. These inventories, and EnergySolutions' proprietary Unit Cost Factors (UCFs), were used to generate required manhours, activity schedule hours and costs, and waste volume, weight, and classification. Based on the activity schedule hours and a decommissioning activities analysis, a Critical Path Method (CPM) analysis was performed to determine the decommissioning schedules. These schedules reflect the effects of sequenced activity-dependent or distributed decommissioning elements such as planning and preparations, major component removal, building decontamination, and spent fuel shipping. The schedules are divided into project phases (periods) and presented, as noted previously, by cost account "License Termination," and "ISFSI D&D." The summary: schedule is shown in Figure 1-1 and may also be found in Section 6.0 of this report.

2

2018 License Termination and ISFSI D&D Cost Document No. 164053-DCE-025 Estimate for the Duane Arnold Energy Center Revision 0 Figure 1-1 Summary SAFSTOR Schedule

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2018 License Termination and ISFSI D&D Cost Document No. 164053-DCE-025 Estimate for the Duane Arnold Energy Center Revision 0

2.0 INTRODUCTION

2.1 Study Objective This report presents the costs for (1) decommissioning Duane Arnold Energy Center (DAEC) to the extent required to terminate the plant's operating license pursuant to 10* Code of Federal Regulations (CFR) 50.75(c), and (2) Independent Spent Fuel Storage Installation (ISFSI)

Decontamination and Demolition (D&D) pursuant to 10 CFR 72.30.

DAEC is 70% owned by NextEra Energy Duane Arnold, LLC. The other owners of DAEC are Central Iowa Power Cooperative (20%) and Com Belt Power Cooperative (10% ). All numbers presented in this report are on a 100% basis.

The estimate methodology follows the basic approach originally presented in the Atomic Industrial Forum/National Environmental Studies Project Report AIF/NESP-036, "Guidelines for Producing Commercial Nuclear Power Plant Decommissioning Cost Estimates," (Ref. No.

1). The report was prepared in accordance with Nuclear Regulatory Commission (NRC)

Regulatory Guide 1.202, "Standard Format and Content of Decommissioning Cost Estimates for Nuclear Power Reactors," (Ref. No. 2). The estimate is based on compliance with current regulatory requirements and proven decommissioning technologies.

This DCE analyzes the following scenario, as defined by DAEC:

60 Year SAFSTOR, 2030 DOE Acceptance, Dry Fuel Storage

• Shutdown on October 30, 2020.

• DAEC' s spent fuel shipping schedules based on a 2030 start date for DOE' s acceptance of.spent fuel.

• Termination of spent fuel pool operation approximately four years after permanent shutdown.

• Following shutdown Phase II and III of the ISFSI will be constructed and all spent fuel will be transferred to Multi-Purpose Canisters (MPCs) for interim.

• SAFSTOR methodology, with decommissioning completed within 60 years of shutdown.

• Decommissioning will be performed by the utility staff and a Decommissioning General Contractor (DGC).

2.2 Regulatory Framework Provisions of current laws and regulations affecting decommissioning, waste management, and spent fuel management are as follows:

1. NRC regulations require a license for on-site storage of spent fuel. Wet storage in a spent fuel pool is authorized by a facility's 10 CFR Part 50 license. On-site dry storage of spent fuel at an Independent Spent Fuel Storage Installation (ISFSI) is licensed by either: (a) the general license set forth in 10 CFR 72.210, which requires that a Part 50 license be in place; or (b) a site-specific ISFSI license issued pursuant to 10 CFR Part 72.

4

2018 License Termination and ISFSI D&D Cost Document No. 164053-DC~-025 Estimate for the Duane Arnold Energy Center RevisionO

2. 10 CPR 50.75 (c) requires funding by the licensee of the facility for the decommissioning program, but specifically excludes the cost of removal and disposal of spent fuel and the removal of clean structures.

3. 10 CPR 50.54 (bb) requires the licensee, within two years following permanent cessation of operation of the reactor or five years before expiration of the operating license, whichever occurs first, to submit written notification to the NRC for its review and preliminary approval of the program by which the licensee intends to manage and provide funding "for the management of all irradiated fuel at the reactor upon expiration of the reactor operating license until title to the irradiated fuel and possession of the fuel is transferred to the Secretary of Energy for its ultimate disposal in a repository." However, the NRC does not currently consider* post-shutdown spent fuel management costs to be decommissioning costs.

4. 10 CPR 72.30 (b) requires that a licensee under Part 72 must submit a decommissioning funding plan that contains information that provides assurance that funds will be available to decommission the ISFSI.

Decommissioning Alternatives The three methods for decommissioning are DECON, SAFSTOR, and ENTOMB, which are summarized as follows:

1. DECON: The equipment, structures, and portions of the facility and site that contain radioactive contaminants are promptly removed or decontaminated to a level that permits termination of the license after cessation of operations.

2. SAFSTOR: The facility is placed in a safe, stable condition and maintained in that state (safe storage). The facility is decontaminated and dismantled at the end of the storage period to levels that permit license termination. NRC regulations require decommissioning to be completed within 60 years of cessation of operation.

3. ENTOMB: Radioactive structures, systems, and components are encased in a structurally long-lived substance, such as concrete. The entombed structure is appropriately maintained and monitored until radioactivity decays to a level that permits termination of the license. Since entombmenfwill exceed the requirement for decommissioning to be completed within 60 years of cessation of operation, NRC handles entombment requests on a case-by-case basis.

The selection of a preferred decommissioning alternative is influenced by a number of factors pertinent at the time of final plant shutdown. These factors include the cost of each decommissioning alternative, minimization of occupational radiation exposure, availability of a low-level waste disposal facility, availability of a high-level waste (spent fuel) repository, regulatory requirements, and public comments.

Post-Shutdown Spent Fuel Management Alternatives 5

2018 License Termination and ISFSI D&D Cost Document No. 164053-DCE-025 Estimate for the Duane Arnold Energy Center RevisionO Selection of a decommissioning strategy* and the associated schedule for completion is in part contingent upon an assumed start date for DOE acceptance of spent fuel and an assumed end date for completion of the transfer of all spent fuel assemblies projected to be generated during a power reactor's operating life. The basic options for long-term post-shutdown spent fuel management currently available to power plant operators are (1) wet storage consisting of continued maintenance and operation of the spent fuel pool, and (2) dry storage consisting of transfer of spent fuel from the fuel pool to on-site dry storage modules after a cooling period.

Maintaining the spent fuel pool for an extended duration following cessation of operations prevents termination of the Part 50 license and typically has a higher annual maintenance and operating cost than the dry storage alternative. Transfer of spent fuel to an ISFSI requires additional capital expenditures for purchase and construction of the ISFSI and dismantlement and disposal of the ISFSI following completion of spent fuel transfer to DOE. In both cases the decommissioning and spent fuel management costs are significantly affected by the assumed start and end dates for DOE acceptance of spent fuel.

In January 2013, DOE released its "Strategy for Management and Disposal of Used Nuclear Fuel and High Level Radioactive Waste" (Ref. No. 4). The DOE Strategy contemplates building the capability to begin executing DOE's commitment to address waste disposal within the next ten years. Under this Strategy, by 2021, operation would begin of a "pilot storage facility" with an "initial focus on accepting spent fuel from shutdown reactor sites." By 2025, a "larger interim storage facility" would be available, and by 2048, a geologic repository would commence operations.

For purposes of this DCE, DAEC has conservatively assumed that the larger interim storage facility is delayed five years and commences operations in 2030. DAEC has further assumed that the DOE acceptance rate is consistent with the 2004 "Acceptance Priority Ranking &

Annual Capacity Report" (Ref. No. 5), which is the most current information regarding acceptance of fuel.

6

2018 License Termination and ISFSI D&D Cost Document No. 164053-DCE-025 Estimate for the Duane Arnold Energy Center Revision 0 3.0 STUDY METHODOLOGY 3.1 General Description EnergySolutions maintains a proprietary decommissioning cost model based upon the fundamental technical approach established in AIF/NESP-036, "Guidelines for Producing Commercial Nuclear Power Plant Decommissioning Cost Estimates," dated May 1986 (Ref. No.

1). The cost model has been updated in accordance with regulatory requirements and industry experience. The cost model includes elements for estimating distributed and undistributed costs.

Distribut~d costs ar~ activity specific and include planning and preparation costs as well as the decontamination, packaging, disposal, and removal of major components and systems. For example, the segmentation, packaging, and disposal of the reactor internals is a distributed cost.

Undistributed costs, sometimes referred to as collateral costs, are typically time dependent costs such as utility and DGC staff, property taxes, insurance, regulatory fees and permits, energy costs, and security staff.

The methodology for preparing cost estimates for a selected. decommissioning alternative requires development of a site-specific detailed work activity sequence based upon the plant inventory. The activity sequence is used to define the labor, material, equipment, energy resources, and duration required for each activity. In the case of major components, individual work sequence activity analyses are performed based on the physical and radiological characteristics of the component and the packaging, transportation, and disposal options available.

In the case of structures and small components and equipment such as piping, pumps, and tanks, the work durations and costs are calculated based on Unit Cost Factors (UCFs). UCFs are economic parameters developed to express costs per unit of work output, piece of equipment, or time. They are developed using decommissioning experience, information on *the latest technology applicable to decommissioning, and. engineering judgment. The total cost of a specific decommissioning activity can be determined by multiplying the total number of units associated with that activity by the UCF, expressed as $/unit, for that activity. For example, the

• estimated demolition cost of a non-contaminated concrete structure can be obtained by multiplying the volume of concrete in the structure by the UCF for non:contaminated reinforced concrete demolition, *expressed in $/unit volume. Each UCF has associated with it a man-hours/unit and schedule-hours/unit. From these values, total man-hours and total schedule-hours can be determined for a particular activity.

3.2 Schedule Analysis Once the work activity durations are calculated for all distributed activities, a critical path schedule analysis is performed using Microsoft Project. The schedule accounts for constraints such as spent fuel cooling periods and regulatory reviews. The schedule is typically delineated into phases or time periods (hereinafter referred to as period or periods) that differentiate manpower requirements and undistributed costs.

In order tb differentiate between License Termination, Spent Fuel, Greenfield, and ISFSI D&D elements of the entire decommissioning scope of work, EnergySolutions has established a Work Breakdown Schedule (WBS) and cost accounting system to treat each element as a subproject.

7

2018 License Termination and ISFSI D&D Cost Document No. 164053-DCE-025 Estimate for the Duane Arnold Energy Center Revision 0 Accordingly, the overall project schedule is divided into interrelated periods with major milestones defining the beginning and ending of each period. The major milestones also serve as the basis for integrating the periods of the four subprojects.

3.3 Decommissioning Staff A site-specific staffing plan was developed by DAEC and EnergySolutions based on the existing DAEC operational staff and the assumption that the decommissioning will be performed by a DGC, with oversight and management of the DGC performed by DAEC staff. It was also assumed that DAEC staff would be supplemented by professional consulting engineering, particularly in the planning and preparation phase. The DAEC existing salary structure serves as the basis for calculating DAEC staff labor costs. The DGC salary costs are based on industry data.

Staffing levels for each project period are based on the AIF guidelines and industry experience.

The sizes of the DAEC and DGC staffs are varied in each period in accordance with regulatory requirements and work activities.

3.4 Waste Disposal Waste management costs comprise a significant portion of the decommissioning cost estimate.

Additionally, limited future access to disposal sites licensed for receipt of Class B and C wastes introduces a significant level of uncertainty with respect to the appropriateness of using e.xisting rate structures to estimate disposal costs of these wastes. The approach used in this DCB to estimate waste disposal costs is discussed in the following paragraphs.

Waste Classification Regulations governing disposal of radioactive waste are stringent in order to ensure control of the waste and preclude adverse impact on public health and safety. At present, LLRW disposal is controlled by NRC regulation 10 CPR 61, which went into effect December, 1983. This regulation stipulates the criteria for the establishment and operation of shallow-land LLRW burial facilities. Embodied within this regulation are criteria and classifications for packaging LLRW such that it is acceptable for burial at licensed LLRW disposal sites.

For each waste classification, 10 CPR 61 stipulates specific criteria for physical and chemical properties that the LLRW must meet in order to be accepted at a _licensed disposal site. The LLRW disposal criteria of 10 CPR 61 require that LLRW generators determine the proportional amount of a number of specific radioactive isotopes present in each container of disposable LLRW. This requirement for isotopic analysis of each container of disposable LLRW is met by employing a combination of analytical techniques such as computerized analyses based upon scaling factors, sample laboratory analyses, and direct assay methods. After performing an isotopic analysis of each container of disposable LLRW, the waste must then be classified according to one of the classifications (Class A, B, C, or Greater Than Class C (GTCC) as defined in 10 CPR 61.

The classification of LLRW resulting from decommissioning activities is based on AIF/NESP-036 (Ref. No. 1) and NUREG/CR-0672 for Boiling Water Reactors (BWRs) (Ref. No. 7), and 8

2018 License Termination and ISFSI D&D Cost Document,No.164053-DCE-025 Estimate for the Duane Arnold Energy Center Revision 0 recent industry experience. The estimated curie content of the reactor vessel and internals at shutdown is derived from NUREG/CR-0672 and adjusted for the different mass of components as well as the period of decay.

Packaging Selection of the type and quantity of containers required for Class B and C wastes is based on the most restrictive of the following constraints: curie content, dose-rate, container weight limit, or container volume limit. GTCC waste from segmentation of the reactor vessel internals is packaged in MPCs. - The selection of container type for Class A waste is based on the transportation mode (rail, truck, barge, etc.) and waste form. The quantity of Class A waste containers is determined by the most restrictive of either container weight limit or container volume limit. Large components, such as steam generators, *pressurizers, and reactor recirculation pumps, are shipped as their own container with shielding as required.

Container costs are obtained from manufacturers. Shielded transport cask and liner costs are obtained from the cask owners and operators.

Transportation Transportation routes to processing and di~posal facilities are determined based on available transportation modes (truck, rail, barge, or combinations). Transportation costs for the selected routes and mode_s are obtained from vendor quotes or published tariffs whenever possible.

Class A Disposal Options and Rates In accordance with the existing LOP Disposal Agreement (Ref. No. 8), all Class A waste that meets the Clive facility waste acceptance criteria is to be disposed of at Clive. All reported waste disposal costs include packaging, transportation, and any applicable surcharges.

Class B and C Disposal Options and Rates Currently, within the United States, there are only three operational commercial disposal facilities licensed to accept Class B and C LLRW: the Barnwell facility~ operated by EnergySolutions in Barnwell, South Carolina; the U.S. Ecology facility in Richland, Washington; and the facility in Andrews County, Texas operated by Waste Control Specialists.

Barnwell only accepts waste from states within the Atlantic Compact, and U.S. Etology only accepts waste from states within the Northwest and Rocky Mountain Compacts. However, the WCS facility will accept waste froin the Texas Compact (comprised of Texas and Vermont) and non-Compact generators. The Texas Compact Commission on March 23, 2012 approved amendments to rules allowing the import of non-compact generator LLRW for disposal at the Andrews County facility.

Greater Than Class C (GTCC)

Wastes identified as 10 CFR 61 Class A, B, and ,c may be disposed of at a near-surface disposal facility. Certain components are highly activated and may exceed the radionuclide concentration limitations for 10 CFR 61 Class C waste. In accordance with 10 CPR 61, these components 9

2018 License Termination and ISFSI D&D Cost. Document No. 164053-DCE-025 Estimate for the Duane Arnold Energy Center Revision 0 cannot be disposed of in a near-surface LLRW disposal facility and must b.e transferred to a geologic repository or a similar site approved by the NRC.

Highly activated sections of the reactor vessel internals will result in GTCC waste. Presently, a facility does not exist for the disposal of wastes exceeding 10 CPR 61 Class C limitations. The courts have held that DOE is obligated to accept and dispose of GTCC and, therefore, this estimate assumes that the DOE will accept this waste along with spent fuel. Although there may be no additional costs for DOE disposal of GTCC, this estimate conservatively assumes a GTCC waste disposal cost. This estimate further assumes that the GTCC waste will be packaged in DSCs and will be shipped to a storage or disposal facility by DOE along with the spent fuel at a shipping costs equivalent to the commercial cost of shipping a Type B licensed, shielded cask such as the CNS 8-120B cask.

LLRW Volume Reduction Based on current Class A LLRW disposal rates on-site volume reduction techniques such as waste compaction or an aggressive decontamination, survey and release effort are not currently considered to be cos{effective over disposal.

Non-Radioactive Non-Hazardous Waste Disposal EnergySolutions assumes that recyclable, non-radioactive scrap metal resulting from the decommissioning program will be transported to a scrap metal dealer. However, no credit is assumed in the estimate for the value of the scrap metal. Concrete debris is assumed to be

• processed by size reduction, with removal of structural reinforcing steel, and used on site as engineered fill for voids. Asphalt from parking lots and roadways is assumed to be stockpiled on site and removed, at no cost to the project, by a recycler. All other demolition debris is removed from th~ site and disposed of at a local construction debris landfill.

Hazardous and Industrial Waste Disposal Lead shielding remaining after shutdown is assumed to be removed from its installed locations and disposed of as a mixed waste. In accordance with information furnished by DAEC thirty percent of insulated systems in radiologically controlled areas are assumed to contain asbestos, therefore; this DCE includes a line item for asbestos abatement. The decommissioning estimate also includes an estimate for hazardous and industrial waste disposal based on information provided by DAEC. The cost of hazardous and industrial waste disposal includes DAEC' s estimated cost for closure of Resource Conservation and Recovery Act (RCRA) storage areas.

Additionally, surfaces coated with lead based paint will be remediated as required for demolition.

3.5 Final Status Survey The cost of performing a final status survey (PSS) is based on NUREG-1575, "Multi-Agency Radiation Survey and Site Investigation Manual (MARSSIM)" (Ref. No. 9). Estimates of MARSSIM Class I, II, and III survey designations are based on radiological characterization data furnished by DAEC and assumptions regarding contamination resulting from small and large component removal activities. The PSS activity cost calculation includes th~ in-place remote 10

2018 License Termination and ISFSI D&D Cost Document No. 164053-DCE-025 Estimate for the Duane Arnold Energy Center Revision 0 survey of underground metal and concrete pipe, soil, and groundwater sampling and analysis.

Estimated costs for NRC and Oak Ridge Institute for Science and Education (ORISE) verification are also included, and the NRC review period is incorporated into the project schedule.

3.6 Contingency Contingencies are applied to cost estimates primarily to allow for unknown or unplanned occurrences during the actual program, e.g. increased radioactive waste materials volumes over that expected, equipment breakdowns, weather delays, labor strikes, etc. This is consistent with the definition provided in the DOE Cost Estimating Guide, DOE G 430.1-1, 3-28-97 (DOE G)

(Ref. No. 10): Contingency "Covers costs that may result from incomplete design, unforeseen and unpredictable conditions, or uncertainties within the defined project scope. The amount of contingency will depend on the status of design, procurement, and construction; and the complexity and uncertainties of the component parts of the project. Contingency is not to be used to avoid making. an accurate assessment of expected costs." EnergySolutions determines site-specific Contingency factors to be applied to each estimate based on industry practices.

The DOE has established a recommended range of contingencies as a function of completeness of program design, DOE G. The ranges are:

Contingency Range Type of Estimate as a % of Total Estimate Planning Phase Estimate 20-30 Budget Estimate 15-25 Title I (Preliminary Design Estimate) 10-20 Title II (Definitive Design Estimate) 5-15 EnergySolutions' approach to assigning appropriate contingency rates is based on adaptations of published values for the specific decommissioning activities. One source for such published information is AIF/NESP-036 "Guidelines for Producing Nuclear Plant Decommissioning Cost Estimates" (Ref. Nb. 1). The AIF guideline identifies contingencies for activities specific to a nuclear power plant decommissioning, such as reactor internals removal. The contingencies presented in the AIF guideline are based on the assumption that the estimated costs are not well known; therefore, the recommended contingencies are greater than they would be if the estimated costs were well known. With the exception of the system decontamination, reactor vessel and reactor internals removal, and disposal, the contingencies presented in the AIF guideline are consistent with the values presented in DOE G 430.1 ~ 1 for a Budget/Title I estimate. The system decontamination, reactor vessel and reactor internals removal, and disposal contingencies recommended in the AIF guideline are significantly higher than the ranges identified by the DOE, even for a planning phase document. This is due to the unique nature of these activities and the relatively small amount of historical data available at the time the AIF document was written.

This estimate applies site-specific contingency factors to each WBS element based on industry practices. The contingencies rates applied in this estimate are specific to decommissioning estimates consistent with information presented in AIF guideline and DOE G. The 11

2018 License Termination and ISFSI D&D Cost Document No. 164053-DCE-025 Estimate for the Duane Arnold Energy Center Revision 0 decommissioning costs generated in the estimate are considered well known and, as such, the contingencies presented in AIF guideline were reduced for each category of costs. There have also been a number of large-scale decommissioning projects since AIF was published, providing some historical information that has been used in preparing this estimate. This allows for additional reduction in contingency costs. The following table provides a summary of contingency values applied in this estimate where the plant structures, systems, and major component material inventories are well defined,'as with this study.

Package Material & Ship&

Category Labor Egui2ment Bury Other Engineering 13%

Contaminated components/Concrete 23% 23% 23%

Clean components 13% 13% 13%

Reactor Vessel and Reactor Internals 50% 23% 25%

Other 15%

The above contingency categories address the difference in uncertainty associated with performance of the work. In the case of a power plant decommissioning project, the segmentation of the reactor internals and pressure vessel and removal of radiologically contaminated plant systems and structures have the highest degree of uncertainty and are therefore assigned the higher contingency rates.

3. 7 Cost Reporting Total project costs are aggregated from the distributed activity and undistributed costs into the following categories - Labor, Materials and Equipment, Waste Disposal, and 0th.er costs. Other costs include property taxes, insurance, license fees, permits, and energy. Waste Disposal costs are the summation of packaging, transportation, base disposal rate, and any applicable surcharges. Health physics (HP) supplies and small tool costs are calculated as a component of each distributed activity cost and included in the category of Material and Equipment, with the exception that HP supplies for third party HP staff are calculated and reported as an undistributed line item. A line item specific contingency is then calculated for each activity cost element.

12

2018 License Termination and ISFSI D&D Cost Document No. 164053-DCE-025 Estimate for the Duane Arnold Energy Center Revision 0 4.0 SITE SPECIFIC TECHNICAL APPROACH 4.1 Facility Description DAEC is a nuclear powered electrical generating facility consisting of one BWR located on a site near Palo in Linn County, Iowa. The plant site comprises approximately 500 acres adjacent to the Cedar River approximately 2.5 miles northeast of the Village of Palo, Iowa.

The nuclear system includes a single-cycle, forced-circulation, General Electric (GE) BWR producing steam for direct use in the steam turbine. The nuclear steam supply system (NSSS) and the turbine-generator were furnished by GE. The balance of plant was designed and constructed by Bechtel Power Corporation (Bechtel) as archit~ct engineer and constructor.

The unit was originally designed, analyzed, and licensed for a steady-state core power of 1,658 MWt, although the plant Technical Specifications restricted operation to a rated power of 1,593 MWt. In 1985, the Technical Specifications were amended to allow the DAEC to operate at a steady-state power level of 1,658 MWt (License Amendment #115). Then, in 2001, the rated power level was increased again to 1,912 MWt (License Amendment #243): The current' shutdown date is October 30, 2020.

Spent fuel assemblies are stored in the spent fuel storage racks in the fuel pool or may, after appropriate decay, be transferred to an ISFSI for interim onsite storage. The DAEC has been authorized by NRC to increase the storage capacity of the DAEC spent fuel pool to 2829 assemblies. In addition, a Cask Pit is also licensed to contain a rack with storage capacity of 323 assemblies. The Cask Pit rack is used as a means to retain full-core* offload capability after such capacity is exhausted in the spent fuel pool. The DAEC may or may not exercise this option in the future. The re-rack project of 1994 increased the spent fuel pool capacity to 2,411 assemblies.

There is an ISFSI on site that houses 10 CFR 72 licensed spent fuel storage systems that can provide interim on-site storage of spent fuel and reactor-related GTCC waste.

Appendix A provides a list of the DAEC systems and structures included in the material inventory for this study.

4.2 Decommissioning Periods for SAFSTOR The project periods for SAFSTOR consist of eleven License Termination periods, seven Spent Fuel Management periods, two Greenfield periods, and two ISFSI D&D periods. 'fhe ,project periods defined for this site-specific study and the major activities performed during each period are as follows:

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2018 License Termination and ISFSI D&D Cost Document No. 164053-DCE-025 Estimate for the Duane Arnold Energy Center Revision 0 License Termination Periods Decon Pd 1 - SAFSTOR Planning Prior to Shutdown

• SAFSTOR Planning and Design

• Preparation of SAFSTOR Plan and License Documents Decon Pd 2 - Transition Following Shutdown

• Perform Historical Site Assessment and Site Characterization

• Flush, Drain, and De-Energize Non-Essential Systems

• Perform Asbestos Abatement

• General Area Cleanup Decon Pd 3 - SAFSTOR Preparation Delay During Spent Fuel Pool Operations

• Periodic Maintenance, Surveillance and Inspection of Non-fuel Related Systems and Structures Decon Pd 4 - Completion of SAFSTOR Preparations

• Flush and Drain Essential Systems Following Fuel Pool Closure

• Secure Site for Dormancy Period

• Volume Reduce Control Rod Blades, Fuel Channels, and LPRMs

• Remove and Dispose of Spent Fuel Storage Racks

• Drain and De-Energize Remaining Systems and Secure Site Decon Pd 5 - Dormancy With Dry Storage

• Periodic Maintenance, Surveillance, and Inspection of Non-fuel Related Systems and Structures

• Bituminous Roof Replacement - 20 year

• Bituminous Roof Replacement - 40 year Decon Pd 6 - Dormancy Only

• Periodic Maintenance, Surveillance and Inspection of Non-fuel Related Systems and Structures Decon Pd 7 - Decommissioning Planning During Dormancy

• Decommissioning Planning and Design

• Planning and Design of Site Revitalization Decon Pd 8 - Internals Segmentation and Site Preparations

• Revitalize Infrastructure and Re-Power Site

• Perform Post-SAFSTOR Baseline Radiation Survey

• Segment, Package, and Ship Reactor Internals

• Construct Site Modifications

• Preparation of License Termination Plan Decon Pd 9 - Major Component and Systems Removal

• Remove, Package, and Dispose of Non-Essential Systems

• Segment, Package, and Dispose of Nuclear Steam Supply System

• Remove and Dispose of Control Rod Drives 14 I

(

2018 License Termination and ISFSI D&D Cost Document No. 164053-DCE-025 Estimate for the Duane Arnold Energy Center Revision 0

• Package and Ship Reactor Pressure Vessel

• Remove, Package, and Dispose of Remaining Active Plant Systems Decon Pd 10 - Building Decontamination

• Decontaminate Structures

• Remove Underground Storm Drains and Manholes

• Final Status Survey for Structures

• Final Status Sµrvey for Land Areas Decon Pd 11 - License Termination

• NRC Review and Approval of the Final Status Survey ISFSI D&D Periods (10 CFR 72.30)

ISFSI D&D Pd 1 - ISFSI D&D Planning

• Preparation and NRC Review of License Termination Plan ISFSI D&D Pd 2 - ISFSI Final Status Survey

• Final Status Survey of ISFSI

• Preparation of FSS Report and NRC Review 4.3 Decommissioning Staff A site-specific staffing pian was develop~d by DAEC and EnergySolutions based on the existing DAEC operational staff and the assumption that the decommissioning will be performed by a DGC, with oversight and management of the dec9mmissioning operations performed by DAEC staff. It is also assumed that the DAEC staff will be supplemented by professional consulting engineering, particularly in the planning and preparation phase. The sizes of the staffs are varied iii each period 'in accordance with regulatory requirements and the work activities. Details on the staff levels during each period are provided in Section 6.0.

4.4 Spent Fuel Shipments .

The spent fuel shipping schedule was provided by DAEC. The spent fuel shipping schedule is based on the DOE 2004 "Acceptance Priority Ranking & Annual Capacity Report" (Ref. No. 5).

The spent fuel shippi~g scheduie is provided in Appendix B.

15

2018 License Termination and ISFSI D&D Cost Document No. 164053-DCE-025 Estimate for the Duane Arnold Energy Center RevisionO 5.0 BASES OF ESTIMATE AND KEY ASSUMPTIONS The bases of, and key assumptions for, this site-specific decommissioning estimate are presented below.

1. All cost data used in this study is current as of 2018 or has been escalated to 2018 dollars. To{als and subtotals have been rounded to significant figures.

2. The estimate is based on a shutdown date of October 30, 2020.

3. The decommissioning will be performed under the current regulations. These regulations require a Post-Shutdown Decommissioning Activities Report (PSDAR) to be submitted prior to, or within, two years after permanent shutdown. In addition, a

, must be submitted to the NRC within 30 certificate of permanent cessation of operations . .

days of permanent cessation of operations. Certification of the final core off-load must also be submitted to the NRC upon completion of this activity. 90 days after the NRC rece1ves the PSDAR and after submittal of both certifications, major decommissioning activities that meet the criteria of 10 CFR Part 50.59 may be performed, provided the NRC does not notify DAEC of any deficiencies.

4. The decommissioning will be performed using currently available technologies.

5. The spent fuel shipping schedule assumes DOE begins accepting spent fuel in 2030.

6. The material inventory for this estimate is based on prior EnergySolutions' take-offs and has been updated, based on information furnished by DAEC, to reflect major structural modifications.

7. All transformers on site following shutdown are assumed to be polychlorinated biphenyl (PCB)-free; therefore, this estimate does not include costs for disposition of PCB contaminated transformers.

8. Cost for transportation of clean scrap metal to a recycler is included in the estimate; however, no credit is taken for the value of the scrap metal. A portion of the concrete debris is assumed to be processed by size reduction, with removal of structural reinforcing steel, and used on site as engineered fill for voids. All other concrete and demolition debris is removed from the site and disposed of at a local off-site construction landfill.

9. Lead shielding remaining after shutdown is assumed to be disposed of as a mixed waste.

10. A budget for hazardous material is included in the estimate, which is based on information provided by DAEC. All other chemicals and hazardous materials present at shutdown are assumed to be removed and disposed of by the plant staff prior to decommissioning, as a normal part of plant operations.

16

2018 License Termination and ISFSI D&D Cost Document No. 164053-DCE-025 Estimate for the Duane Arnold Energy Center Revision 0

11. No known areas of radiologically contaminated soil have been identified. Additionally, documented tritium levels in groundwater are below drinking water standards.

Therefore, no soil or groundwater remediation costs will be assumed.

12. DAEC provided information on the current amount of asbestos insulation on systems piping. It is assumed that asbestos not replaced during an outage and still remaining at shutdown will be limited to areas with higher dose rates. Therefore, this study considers that 30% of the insulation on contaminated and insulated piping will be asbestos and disposed of as Class A waste.

13. Costs for disposition of greater than Class A LLRW either currently stored on site or anticipated to be on site at the time of decommissioning are included in this estimate.

The types and quantities of greater than Class A LLRW were provided by DAEC, and include, but are not limited to the following expected to be stored in the spent fuel pool at the time of shutdown:

27 control blades 24 Local Power Range Monitors 25 blade guides 6 half blade guides

14. All Class A waste is assumed to be disposed of at EnergySolutions' facility in Clive, Utah, in accordance with the existing LOP Disposal Agreement between EnergySolutions and DAEC (Ref. No. 8).

15. DAEC furnished Class Band C waste disposal rates.

16. DAEC provided costs used to estimate the assumed GTCC disposal cost.

17. GTCC waste generated from the segmentation of the reactor internals will be packaged in MPCs. In this estimate, the MPCs are assumed to be accepted by DOE at the time of the deferred decommissioning.

18. Vessel and internals curie estimates were derived from the values for the Reference BWR vessel and internals in NUREG/CR-0672 (Ref. No. 7) and adjusted for mass and the SAFSTOR decay period.

19. The site-specific classification of radioactive wastes for DAEC identified one components within the reactor vessel (the Core Shroud) will exceed Class C limitations.

Two NUHOMs MPCs are assumed to be required and DAEC provided the estimated costs.

20. Spent fuel will remain in the spent fuel pool for approximately four years before being transferred to the ISF~I.

21. The ISFSI pad and HSMs are assumed to have no activated concrete or surface contamination.

17

2018 License Termination and ISFSI D&D Cost Document No. 164053-DCE-025 Estimate for the Duane Arnold Energy Center RevisionO

22. The 10 CFR Part 50 .license will be maintained until DOE has taken possession of the spent fuel.

23. Environmental Permits costs are based on data furnished by DAEC and were adjusted to meet the requirements of each period.

24. An estimate of the annual property taxes was furnished by DAEC and included in the estimate.

25. Annual NRC 10 CFR 171.15 fees, for reactors in decommissioning, of $198,000 are included in the estimate. ,

26. The estimate includes annual NRC inspection fees during each decommissioning period based on the type and level of activities being performed along with NRC review fees for license amendment requests, exemption requests and the License Termination Plan based on NRC's hourly rate of $275 per hour.

27. Annual operating insurance premiums were supplied by DAEC. The premium amounts were adjusted to meet the requirements of each period based on information provided by DAEC.

28. DAEC provided an annual allowance for miscellaneous materials and services to account for costs such as communications, miscellaneous utilities and services, office supplies, and consumables not captured elsewhere in the estimate.

29. DAEC staff positions and average burdened salary data were supplied by DAEC and accou:11t for fringe benefits, overhead and payroll taxes.

30. DGC staff salaries, including overhead and profit, were determined by EnergySolutions and represent EnergySolutions' standard assumptions for these rates

31. DAEC staff severance and retention costs were supplied by DAEC.

32. The current utility staff size is considered to be sufficiently stable to remain virtually unchanged to end of life. For this reason, the utility staff is assumed to be the same size at the time of shutdown.

33. The professional personnel used for the planning and preparation activities are assumed to be paid per diem at the rate of $93/day, based on per diem rates from U.S. General Services Administration (GSA) for Cedar Rapids, Iowa.

34. Craft labor rates were furnished by DAEC. Craft labor rates for disciplines not furnished by DAEC have been taken from the 2018 RS Means Labor Rates for the Construction Industry (Ref. No. 11), for Cedar Rapids, Iowa. Since the skilled laborers are assumed to be supplied by the local union hall, they will not be paid per diem.

35. The security guard force included in this DCE is in accordance with NRC security regulations as implemented by an NRC approved security plan and anticipated 18

2018 License Termination and ISFSI D&D Cost Document No. 164053-DCE-025 Estimate for the Duane Arnold Energy Center Revision 0 amendments to that plan applicable during each decommissioning period following shutdown.

36. This study follows the occupational exposure principles of As Low As Reasonably Achievable (ALARA) through the use of productivity loss factors that incorporate sueµ items as the use of respiratory protection and personnel protective clothing. These factors increase the work duration and cost.

37. The costs of all required safety analyses and safety measures for the protection of the general public, the environment, and decommissioning workers are included in the cost estimates. This reflects the requirements of:

10CFR20 Standards for Protection Against Radiation 10 CFR50 Domestic Licensing of Production and Utilization Facilities 10 CFR61 Licensing Requirements for Land Disposal of Radioactive Waste 10 CFR 71 Packaging of Radioactive Material for Transport 10 CFR 72 Licensing Requirements for the Independent Storage of Spent Nuclear Fuel and High-Level Radioactive Waste 29 CFR 1910 Occupational Safety and Health Standards 49 CPR 170-189 Department of Transportation Regulations Governing the Transport of Hazardous Materials Reg. Guide 1.159 Assuring the Availability of Funds for Decommissioning Nuclear Reactors

38. Activity labor costs do not include any allowance for delays between activities, nor is there any cost allowance for craft labor retained on site while waiting for work to become available.

19

/

2018 License Termination and ISFSI D&D Cost Document No. 164053-DCE-025 Estimate for the Duane Arnold Energy Center Revision 0 6.0 STUDY RESULTS 6.1 60-Year SAFSTOR, 2030 DOE Acceptance, Dry Fuel Storage Based on the following:

• Shutdown on October 30, 2020.

• DOE begins accepting spent fuel in 2030.

• Termination of spent fuel pool operation approximately four years after permanent shutdown.

• Following shutdown Phase II and III of the ISFSI will be constructed and all spent fuel will be transferred to MPCs.

• SAFSTOR methodology, with decommissioning completed within 60 years of shutdown.

• Decommissioning will be performed by an independent Third Party.

Spent Fuel Shipping Schedule The spent fuel shipping schedule is provided in Appendix B. All spent fuel will be removed from the spent fuel pool by the end of 2024. All spent fuel will be removed from the ISFSI by the end of 2059.

Cost and Schedule A summary project schedule is shown in* Figure 6-1. A detailed schedule is provided in Appendix C. Table 6-1 summarizes the period durations and total costs, including contingency, for License Termination and ISFSI D&D activities. A detailed cost table is provided in Appendix D, and a table of annual expenditures is provided in Appendix E.

Project Staffing Staffing is based on the assumption that decommissioning will be performed by the utility staff and a DGC. Utility staffing levels, by organizational department and function, for each period are provided in Table 6-2. DGC staffing levels, by organizational department and function, for each period are provided in Table 6-3.

Waste Disposal Volumes The estimated cubic feet of waste are summarized as follows:

Class A 501,978 Class B 1,203 Class C 226 GTCC 128 Waste disposal volumes and costs, itemized by packaging, transportation, surcharges, and disposal costs by waste class and facility, are provided in Table 6-4. The waste disposal costs provided in Table 6-4 do not include contingency.

20

2018 License Termination and ISFSI D&D Cost Document No. 164053-DCE-025 Estimate for the Duane Arnold Energy Center Revision 0 Figure 6-1 Summary SAFSTOR Schedule

!

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• 81J:Jalng o.cc:npmffititan osr,m11 011ol*2tl90 Deme Pel 11 - l.Jolf'MTerd"lad<<'I 0\ ft'20eD 091'11.'2090 En060J'U' SAFSTOR 101251'2!:e) 1QW20etl ,

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• C l r ' M ~ ~ C U ' t l g ~ - 06'22'207 1 CmPC12 - SllleAf*aratlon 01/01'2090 05,G!l.2080 21

2018 License Termination and ISFSI D&D Cost Document No. 164053-DCE-025 Estimate for the Duane Arnold Energy Center RevisionO Table 6~1 Cost and Schedule Summary (2018 Dollars in Thousands)

.' :, -r~fi6d:°f~_tiL: :.*~ :..~*':.~, .\ _.:~ :,~-~)>.~t}ij:J>>i~~tt~ti~~-, : . ,:....... ~~-. ,,: ,::: 'scikL:. :.:~ . :~Eiicl, ,::,*::,::xt~ij***:)xx,t~i::c~~L License Termination (50.75(c))

IDeconPd 1 SAFSTOR Planning Prior to Shutdown 4/1/2019 10/30/2020 L58 $11,66<:

loecon Pd 2 Transition Following Shutdown 10/30/2020 4/8/2022 1.43 $92,226 SAFSTOR Preparation Delay During Spent Fuel Pool IDeconPd 3 4/8/2022 10/29/2024 2.55 $23,724 Operations IDeconPd4 Completion of SAFSTOR Preparations 10/29/2024 9/30/2025 0.91 $21,886 IDeconPd 5 Dormancy With Dry Storage 9/30/2025 10/30/2059 34.08 $62,734 IDeconPd 6 Dormancy Only 10/30/2059 9/26/2073 13.90 $37,311

[)econ Pd 7 Decommissioning Planning During Dormancy 9/26/2073 3/7/2075 1.44 $50,682 tDeconPd 8 Internals Segmentation and Site Preparations 3/7/2075 7/16/2076 1.36 $117,713 IDeconPd 9 Major Component and Systems Removal 7/16/2076 5/19/2078 1.83 $214,466

[)econ Pd 10 Building Decontamination 5/19/2078 1/3/2080 1.62 $103,240 IDecon Pd 11 License Termination 1/3/2080 9/19/2080 0.71 $4,451 Account Total 61.41 $740,099 ISFSID&D (72.30)

[SFSI D&D Pd 1 ISFSI D&D Planning 8/23/2075 12/30/2077 2.35 $887

[SFSI D&D Pd 2 ISFSI Final Status Survey 12/30/2077 1/12/2079 1.03 $754 k\.ccount Total 3.38 $1,640 Scenario Total $741,739 Note: Numbers may not add due to rounding.

22

2018 License Termination and ISFSI D&D Cost Document No. 164053-DCE-025 Estimate for the Duane Arnold Energy Center RevisionO Table 6-2 Utility Staff Levels1 Liceqse Termin.atiol! -50.75(c) Utility Staff Deci>n '.Decon . .. Diicon ....Dec;on ;:, Decon DeC!)iI i . !)econ. Decoli nec<fll ~~ D~ll' Decon.

1Departii:t~qt , . ,.,'pc:1ot' i>A2* .. )'d3_.,,,. N.4." i'ds ,Pd"6, 'Pd7':: ,;,Pd8

• fd.!)' . _ Pd)O . !'i>d 11 ::*

Administration and Support 1 22 3 3 0 0 3.50 IO IO 8.5 3 Emergency Preparedness 0.5 0 0 0 0 0 0 0 0 0 0 Engineering, Oversight and Licensing 9.75 43 3 3 0 0 12 16.75 15.25 11 2 Executive Management 0.25 10 1 1 2 2 2.50 3 3 3 1 Plant Maintenance 1.5 47 4 4 1 1 1 19 IO 5 0 Plant Operations 1.25 37 3 3 0 0 0 4 4 1 0 Quality Assurance 0 2 0 0 0 0 0 2 3 3 2 Radiation Protection & Chemistry 2.75 26 5 5 2 2 4.5 19 37 37 1 Period Totals 17 187 19 19 5 5 23.75 73.75 82.25 68.5 9 lSFSI D&D - Utilitv Staff

?"' , y* .,. . . . .

lSFSID&D:' . ISFSID&D'

,o,,

oeoartment Pdl . _:;:_i>dZ:/.

• Engineering, Oversight and Licensing 1 Quality Assurance 0 0.75 Radiation Protection & Chemistry 0.5 0.5 Period Totals 1.5 2.25 1

Security staff levels are safeguards information and therefore not included.

23

2018 License Termination and ISFSI D&D Cost Document No. 164053-DCE-025 Estimate for the Duane Arnold Energy Center RevisionO Table 6-3 Decommissioning General Contractor (DGC) Staff Levels License Termination - 50.75(c) DGC Staff

, __ .

'

.. .. .. ..

)coli:* .. ,D~Ii D~c(in :Decoii 'rnicon°' -.Decori *oecon , **D'1con* Diam Decon -:>>J~ii* '\

      , DepartmeJit:   PC
                                         *,
                                            *.        l~<<!J        Pd2. P(j~.  :

• Pd4 P<<JS* ).\il.6,. J>~7. Pd_S ..
• Pd-9 .)PdlO ;::Pdi! ..

Administration 0 0 0 0 0 0 4 9 9.0 9.00 1 Decon Operations 0 0 0 0 0 0 2 6 18 14 0 Engineering 0 0 0 0 0 0 2.5 6 6 4.50 Environmental Health & Safety 0 0 0 0 0 0 1.5 5 6 6 0 Executive 0 0 0 0  ! 0 0 3 4 4 4 2 Project Controls Work Planning 0 0 0 0 0 *o 4.5 7 7 5.00 Quality Assurance 0 0 0 0 0 0 0.5 2 2.00 Radiation Protection 0 0 0 0 0 0 13 33 24 1 Site Closure 0 0 0 0 0 0 0.5 2 4 5 3 Waste Operations 0 0 0 0 0 0 4 11 10 0 Period Totals 0 0 0 0 0 0 19 57 99.5 84 8 ISFSI D&D - DGC Staff

                                                                                                *I$FSfD:&.;D. ' JSFSO>&D *
                                               ;~Department ....                                     Pd-1            Pd.2 Engineering, Oversight and Licensing                    0             0 Quality Assurance                                       0             0 Radiation Protection & Chemistry                        0             0 Period Totals                                          0             0 24

2018 License Termination and ISFSI D&D Cost Document No. 164053-DCE-025 Estimate for the Duane Arnold Energy Center Revision 0 Table 6-4 Waste Disposal Volumes

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                          *' J*
                                ' - '
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                                                               *Weight
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                                                                                                  '~

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                                                                                                                          \

Commercial Dispos.al Facility for B & C Wastes Class B - Activated Hardware 47,110 308 384 Class C - Activated Hardware 91,009 226 1,670 Class B - Resin and Filters 54,926 895 1,311 193,045 1,429 3,365 GTCC 62,590 128 1,018 EnergySolutions Class A - Debris 18,389,635 329;151 455,146 Class A - Oversized Debris 7,824,790 112,378 166,355 Class A -: Cask Shipment 186,306 380 2,754 Class A - Containerized Waste 163,206 1,333 3,808 Class A - Large Component 4,125,200 58,652 78,230 Mixed Waste (Lead) 30,000 85 288 30,719,137 501,978 706,582 Other Local Construction Debris Landfill 90,303,566 1,031,207 1,306,313 Process for On-Site Fill 193,657,230 2,969,411 2,969,411 Scrap Metal Recycler 26,106,954 310,382 310,382 310,0(17,750 4,311,000 4,586,106 Grand Total 340,197,547 4,800,749 5,288,522 Note: Numbers may not add due to rounding. 25

2018 License Termination and ISFSI D&D Cost Document No. 164053-DCE-025 Estimate for the Duane Arnold Energy Center RevisionO

7.0 REFERENCES

1. Atomic Industrial Forum, Inc., "Guidelines for Producing Commercial Nuclear Power Plant Decommissioning Cost Estimates," AIF/NESP-036, May 1986.

l

2. U.S. Nuclear Regulatory Commission, "Standard Format and Content of Decommissioning Cost Estimates for Nuclear Power Reactors," Regulatory Guide 1.202, February 2005.

3. Federal Register, Vol. 4, "Standard Contract for Disposal of Spent Nuclear Fuel and/or High-Level Radioactive Waste," NRC 10 CFR Part 961 (DOE), January 1, 1999.

4. U.S. Department of Energy, "Strategy for the Management and Disposal of Used Nuclear Fuel and High-Level Radioactive Waste," January 26, 2013.

5. U.S. Department of Energy, "Acceptance Priority Ranking & Annual Capacity Report,"

DOE/RW-0567, July 2004.

6. U.S. Nuclear Regulatory Commission, "Technology, Safety and Costs of Decommissioning a Reference Pressurized Water Reactor Power Station," NUREG/CR-0130, June 1978.

7. U.S. Nuclear Regulatory Commission, "Technology, Safety and Costs of Decommissioning a Reference Boiling Water Reactor Power Station," NUREG/CR-0672, June 1980.

8. Life-of-Plant Disposal Agreement, between EnergySolutions and FPL Energy Duane Arnold, LLC, January 1st, 2007.

9. U.S. Nuclear Regulatory Commission, "Multi-Agency Radiation Survey and Site Investigation Manual (MARSSIM)," NUREG-1575, Rev. 1, August 2000.

10. U.S. Department of Energy, "Cost Estimating Guide," DOE G 430.1-1, March 1997.

11. RS Means, "Labor Rates for the Construction Industry," 2018 26

2018 License Termination and ISFSI D&D Cost Document No. 164053-DCE-025 Estimate for the Duane Arnold Energy Center Revision 0 Appendix A List of Systems and Structures

Duane Arnold Energy Center System and Structure List Unit 1 Type System Name or Description ESS Area Rad Monitoring ESS Breathing Air ESS CO2 Fire Protection ESS Control Bldg HVAC ESS Diesel Generator HVAC ESS Diesel Oil System ESS Domestic Water ESS Drywell Sumps ESS Fire Protection ESS Fuel Pool Cooling & Cleanup ESS Instrument Air ESS Liquid Radwaste ESS LLRPSF Area HVAC

      . ESS      LLRPSF Area Sumps ESS      Offgas Exhaust ESS      Primary Containment ESS      Primary Containment HVAC ESS      Radwaste Bldg HVAC ESS      Radwaste Bldg Sumps ESS      Reactor Bldg HV AC ESS     Reactor Bldg Sumps ESS     Reliable Hard Pipe Vent Modification ESS     RW Evaporator & Solid ESS     SEDS Self Engaging Dewatering System ESS     Service Air ESS     Solid Radwaste ESS     Spent fuel pool instrumentation
     ~  ESS     Stack Gas & Bldg Kaman Rad Monitoring ESS     Standby Diesel Generator ESS     Training Center & Equipment ESS     Turbine Bldg HVAC ESS     Turbine RB Radwaste Bldg Sampling ESS     Well Water NON     Admin Bldg Sumps NON     Administration Bldg HVAC NON     Aux Heating Sys Boiler NON      Chlorination & Acid Feed NON      Circulating Water NON      Condensate & Demin Water NON      Condensate Demineralizer NON      Condenser Air Removal NON     Containment Atm Dilution NON     Containment Atmosphere Control NON     Cooling Tower NON     Data Acquisition Center HVAC NON     Drywell Radiation Monitors Page 1 of4

Duane Arnold Energy Center System and Structure List Unit 1 Type System Name or Description NON Electrical NON Extract Steam Htr-Vents-Dms NON Feedwater NON General Service Water NON H2 Water Chemistry NON Hydrogen Seal Oil NON Intake Structure HVAC NON Lube Oil Transfer & Storage NON Mach Shop & OG Bldg HVAC NON Makeup Demineralizer NON MiscHVAC NON *Nitrogen NON Offgas Bldg Sumps . NON Offgas Recombiner NON Post Accident Sampling NON Pumphouse HVAC NON Reactor Bldg Closed Cooling Water NON Reactor Water Cleanup NON Residual Heat Removal NON RHR Service Water NON River Water Supply NON Sanitary Drains NON Standby Gas Treatment NON Stator Cooling NON Technical Supper Center HV AC NON Torus Vacuum Breakers NON Turbine Bldg Sumps NSSS Condensate NSSS Condenser NSSS CRD Hydraulic NSSS Emergency Service Water NSSS High Pressure Coolant Injection NSSS Low Pressure Core Spray NSSS Main Steam NSSS Nuclear Boiler NSSS Reactor Core Isolation Cooling NSSS Reactor Vessel Recirculation NSSS Standby Liquid Control NSSS Traversing Incore Probe Cal NSSS Turbine NSSS Turbine Steam Seals & Drains STRUC Administration Building STRUC Badging Center STRUC Breathing Air Enclosure STRUC Circulating Water Pipe STRUC Circulating Water Tower No 1 Page 2 of4

Duane Arnold Energy Center System and Structure List Unit 1 Type System Name or Description, STRUC Circulating Water Tower No 2 STRUC Civil Shop STRUC Compressor Building STRUC Condensate Storage Tank Foundation STRUC Construction Support Center STRUC Control Building STRUC Cooling Tower Control & Valve House I STRUC Cooling Tower Control & Valve House 2 STRUC Cooling Tower Training STRUC Data Acquisition Center STRUC Discharge Structure STRUC East Warehouse STRUC Electrical Equipment Building - ISFSI STRUC Electrical Maintenance STRUC Exis(ing Concrete Slabs STRUC Existing Waste Water Treatment Plant STRUC FLEX Storage Building STRUC Guard Facility and Security Structures STRUC HPCI and RCIC Building STRUC Intake Structure STRUC ISFSI - Phase 3 STRUC ISFSI Electrical Equipment Bldg STRUC ISFSI Monitoring Building STRUC Kelly Building STRUC LLRPSF Transformer Foundation

      ~TRUC      Low Level Radwaste Storage and Processing STRUC     Machine Shop STRUC     Mechanical Maintenance STRUC     New Site Support Building STRUC     Off Gas Retention Building STRUC     Off Gas Stack STRUC     Oil Drum Storage Building STRUC     Plant Support Center STRUC     Pump House STRUC    *Radwaste Building STRUC     Railroad Air-Lock STRUC     Reactor Building STRUC     Security !'1ods and Upgrades STRUC     Site Transformer Foundations STRUC     Sluice Gate Structure STRUC     Sulfuric Acid Tank Foundation STRUC     Support Shop STRUC     Technical Support Center STRUC     Trailer Pad STRUC     Training Center STRUC    Turbine Building Page 3 of4

Duane Arnold Energy Center System and Structure List Unit 1 Type System Name or Description STRUC Turbine Pedestal STRUC Underground Diesel Oil Tank STRUC Underground Fuel Oil Tank STRUC Waste Staging Area STRUC Waste Water Treatment Plant STRUC Well Water Pump House 1,2,3,4 STRUC West Warehouse Page 4 of4

2018 License Termination and ISFSI D&D Cost Document No. 164053-DCE-025 Estimate for the Duane Arnold Energy Center Revision 0 AppendixB Spent Fuel Shipping Schedule

Duane Arnold Energy Center Spent Fuel Shipping Schedule for October 30, 2020 Shutdown Based on 2030 DOE Acceptance

                  ,1 .. -  "-   - - -  Assemb!Ies:-                               -+---,---          -- - *~-*- *          * ***:Assemblies --

Transfered fioni Assemlilibsin Total . Assemblies Shipp~d-io DOE Cwn)!lative )'.e,i. Fue1 Disch;rrged.

                        -*NoDfy
                       )vliJ11riles_:

PooHoDry __ Storage Fuel Pool ~sembliesin_ .

                                                        , : Storage ., .. Dryfilorag~;-

I9!! Asse_ mbli.*es.jn; Sllipp_ed to oo Site St9rag"', Froll\P!lol. __E ** _fro_m___- i;)ry _._sr,,!]ig~ Assemblies

                                                                                                                                                   , :_Sh_ippe<!l!)_~oJ;:l 2008        0                10                 0              1758            610              2368                   0                    0                  0 2009       152                0                 0              1910            610              2520                   0                    0                  0 2010       152                0                 0              2062            610              2672                   0                    0                  0 2011        0                 10               610             1452           1220              2672                  0                     0                  0 2012       152                0                 0              1604           1220              2824                   0                    0                  0 2013        0                 0                *o              1604           1220              2824                   0                    0\                 0 2014       152                0                 0              1756           1220              2976                   0                    0                  0 2015        0                 0                 0              1756           1220              2976                   0                    0                  0 2016       152                0                 0              1908           1220              3128                   0                    0                  0 2017        0                 0                 0              1908           1220              3128                   0                    0                  0 2018       152                0                 0              2060           1220              3280                   0                    0                  0 2019        0                 0                 0              2060           1220              3280                   0                    0                  0 2020       368                5                305             2123           1525              3648                   0                    0                  0 2021        0                 0                 0              2123           1525       I      3648          I        o                    0                  0 2022        0                 0                 0              2123           1525              3648                   0                  .o                   0 2023        0                 0                 0              2123           1525              3648                   0                    0                  0 2024        0                35               2123               0            3648              3648                   0                    0                  0 2025        0                 0                 0                0            3648              3648                   0                    0                  0 2026        0                 0                 0                0            3648              3648                   0                    0                  0 2027        0                 0                 0                0            3648              3648                   0                    0                  0 2028        0                 0                 0                0            3648              3648                   0                    0                  0 2029        0                 0                 0                0            3648              3648                   0                    0                  0 2030        0                 0                 0                0            3648              3648                   0                    0                  0 2031        0                 0                 0                0            3648              3648                   0                    0                  0 2032        0                 0                 0                0            3648              3526                   0                  122                 122 2033        0                 0                 0                0            3648              32,82                  0                  244                 366 2034        0                 0                 0                0            3648              3099                   0                  1~                  549 2035        0                 0                 0                0            3648              2916                   0                  1~                  732 2036        0                 0                 0                0            3648              2794                   0                  122                 854 2037        0                 0                 0                0            3648              2611                   0                  1~                 1037 2038        0                 0                 0                0            3648              2489                   0                  122                1159 2039        0                 0                 0                0            3648              2367                   0                  122                1281 2040        0                 0                 0                0            3648              2245                   0                  122                1403 2041        0                 0                 0                0            3648              2062                  0                   1~                 1586 2042        0                 0                 0                0            3648              1879                  0                   1~                 1769 2043        0                 0                 0                0            3648              1757                  0                   122                1891 2044        0                 0                 0                0            3648              1635                  0                   122                2013 2045        0                 0                 0                0            3648              1635                  0                     0                2013 2046        0                 0                 0                0            3648              1513                  0                   1n                 2135 2047        0                 0                 0                0            3648              1330                  0                   I~                 2318 2048        0                 0                 0                0            3648              1269                  0                    61                2379 2049        0                 0                 0                0            3648              1147                  0                   122                2501 2050        0                 0                 0                0            3648              1025                  0                   122                2623 2051        0                 0                 0                0            3648               903                  0                   122                2745 2052'       0                 0                 0                0            3648               781                  0                   in                 2867 2053        0                 0                 0                0            3648               659                  0                   122                2989 2054        0                 0                 0                0            3648               598                  0                    M                 3050 2055        0                 0                 0               0             3648               476                  0                   1n                 3172 -

2056 0 0 0 0 3648 354 0 122 3294 2057 0 0 0 0 3648 232 0 1n 3416 2058 0 0 0 0 3648 110 0 1n 3538 2059 0 0 0 0 3648 0 0 110 3648

2018 License Termination and ISFSI D&D Cost Document No. 164053-DCE-025 Estimate for the Duane Arnold Energy Center Revision 0 AppendixC Detailed Project Schedule

Duane Arnold Energy Center Project Schedule for SAFSTOR, 2030 DOE Acceptance, Dry Storage 15600 d1y1 Odays Odays 10/30/2059 SNF Pd 1 - Spent Fuel ?tanning 413days D4/01/2019 SNF Pd 1 Begins Prepare Irradiated Fuel Management Plan Submil EA to Allow Spent Fuel Costs to Taken From DTF Design Spent Fuel Pool Secunty MociticallOtlS

                                                                       .

Odays

                                                                     , ,.

220 days 125days 04I01 /2019 04J01 /2019 1 1/12/20 19 OW7/2020 SNF Pd 1 Ends Odays 1"'29/2020 SNF Pd 2 - Spent Fuel Cooling During Zlre Are Window 378 days 10/30/2020 SNF Pd 2 Begins Oday, 10/29/2020 10/29/2020 lmpklmen1 Spent Fuel Pool SecurityModifica1ions 160days 08/02/2021 04/08/2022 Subm~ lrradia1ed Fuel Management Plan Odays 04/21/2021 04/21/2021 Submil Cask Vendor Revised Cenificate ol Compliance (Coe) Odays 04/21/2021 04/21/2021 Submi1 LAA tor ISFSI only Emergency Plan Odays 06/18/2021 06/18/2021 Submil LAA for ISFSI Only Tech Specs and Revised OA Plan Odays 06/18/2021 0&1812021 Subm i1 LAA tor Permanently Detueled Security Pian Odays 04"8/2022 04/1l8/'l022 SNF Pd 2 Ends Odays 04"8/2022 04/08/2022 SNF Pd 3 - Spent Fuel Transfer to Dry Storage 667days 04/08/2022 10J29/2024 SNF Pd 3 Begins Odays 04/08/2022 04/08/2022 Construe, ISFSI Phase 2 and 3 Pad Expansion 120 days 1Zf28/2022 06/14/2023 Spent Fuel Pool to Pad Transfer 360 days 06/14/2023 10/29/2024 Construct ISFSI Moni1onno Building 180 days 02/21/2024 1Q.12S.12024 Spent Fuel Pool Empty Odays 10/29/2024 10/29/2024 SNF Pd 3 Ends Odays 10129/2024 10/29/2024 SNF Pd 3

• Dry Storage During Completion of SAFSTOR PTeparal 240daya 10129/2024 09f30/2025 SNF Pd 3 Segills Odays 10/29/2024 10l29/2024 SNF Pd 3 Ends Odays 09130/2025 09/30/2025 SNF Pd 4
• Ory Storage During Dormancy 881n daya 09/30/2025 10/30/2059 SNF Pd 4 Begins Odays 09/30/2025 09/30/2025 Spent Fuel Transter 10 DOE 7258days 0110&'2032 10/30/2059 SNF Pd4 Ends Odays 10/30/2059 1000/2059 SNF Pd 5
• ISFSI Demolition Delay 4740daya 10/30/2059 12/31/2077 SNF Pd 5 Begns Odays 10/30/2059 10/30/2059 SNF Pd 5 Begins Odays 12/31/2077 12131120n SNF Pd 6
• ISFSI and Support Structure Clean Demolition 150 daya 12131120n 07!28/2078 SNF Pd 6 Begins Odays 12/31/2077 12131120n Clean Demolition ol lSFSI 120days 12/31/2077 0&'16/2078 Demolish ISFSI Suppon Structures 60day, 03'2~78 0&'16/2078 Backhll and Grade 1SFSI Site 30days 06/17/2078 07128/2078

  $NF Pd 5 Ends                                                      Odays  07128/2078     07!28/2078 ISFSI O&D Pd 1

• ISFSI O&D Planning 615daya 08/23/2075 12/31Jt20n ISFSI D&D Pd 1 Begins Odays 08/23/2075 0&123/2075 Preparation of ISFSI Por1ion of LTP 220 days 08/23/2075 06/25/2076 NAC Review ol lSFSI Por1ion LTP 380day1 07/ 1712076 12/30/2077 ISFSI D&D Pd 1 Ends Odays 12/30/2077 12/30/2077 ISFSI D&D Pd 2
• 1SfSI Final Status Survey 270days 12/30/2077 01112/2079 ISFSI D&D Pd 2 Begil1s Odays 12/30/2077 12/30/2077 Fnal S1alus Survey of ISFSI 90day, 12/31/2077 05/05/2078 Pr8?M8.tion ol FSS Report and NRC Review 180days 05/06/2078 01/1 2/2079 ISFSI D&D Pd 2 Begins Odays 01/1 2/2079 01 / 12/2079 16067daya 04/01/2019 10/29/2080 Odays 10/29/2020 10/29/2020 Decon Pd 1
• SAFSTOR Planning Prior to Shutdown 413days 04/01/2019 10/3012020 Dec:on Pd 1 Begins Odays 04/01/2019 IWOl/2019 Planning ol His10neal Sl1e Assessmenl (HSA) and Scoping Surve 30days 04/01/2019 Perform HSA 90 day, 05113/2019 09/1 3/2019 Perfom, Scoping Survey 90 day, 09/16/2019 Perform SAFSTOR Pl8nnino and Design 220 day, OC/08/2019 Preparation ol SAFSTOR License Documents 320 days 04/01/20 19 Perform Sile Environmental Review and Environmental Assa: 180days OC/01/2019 12/06/2019 Prepare Decommissioning Cos1 Estimate 120days 12/30/2019 0&'12/2020

Duane Arnold Energy Center Project Schedule for SAFSTOR, 2030 DOE Acceptance, Dry Storage repare ost- hutdown ecomm1ssioning ActMl!es eport 120days Prepare Post-Shutdown Technical Specification (TS) Mod1fia 180 days 04/01/2019 12/06/2019 Prepare Deluel Safety- Analysis Report (DSAR) 320days 04/01/2019 06/19/2020 Pertorm Emergency Plan Supporting Calculations 120 days 04/01/2019 09113/2019 Prepare Post -Sht.r\down Emergency Ptan 180 days 04/0112019 12/W2019 Prepare Post -Shutdown Security and Cyber Security Plans 220 . . ,. 04/01/2019 Ot/31/2020 Develop Certified Fuel Handlers (CFH) Training Program 180 days 04/01/2019 12/0&2019 RfMse Plant Programs and Procedures tor Shl.lldown 320 days 04/01/2019 06/19/2020 Submit License Amendment end Exemption R*quests Odays 11/1 2/2019 11 112/2019 Submit LAR tor Permanently Oelueled Technical specmcalia Odays 11/12/2019 11/1 2/2019 Submit CFH LAA lo Replace licensed Operators wt1h CFHs Odays 11112/201 9 11/1 2/2019 Submit Detueled Seciinty Pianand E:ii.empllons to 10 CFR 73 Odays 11/12/201 9 11/12/2019

                                                                     ....,.

Submit EA 10 Revise Records Retention R1tq1.1iremen1s Oo,y, 11/12/201 9 11/12/2019 Submll PSDAR and DCE to NRC Odays oon2/2020 06112/2020 NRC Review ol PSDAA and DCE 06115l2020 10/16/2020 Prepare SAFSTOR ln1egrated Work Schedule 180days 01/2CW2020 09/25/2020 Prepare SAFSTOR ActiVlly Specifications 180days 01/20/2020 09/25/2020 Prepare Detailed SAFSTOA w011I Procedures

                                                                     ....,.

180days 01f20/2020 09/2Sl2020 Pertorm Part 37 and SNM Assessmem 120days 01/20/2020 07/03/2020 Planning tor Asbestos Abalemeflt 01!20l2020 05/22/2020 Oecon Pd 1 Ends Odays 10/29/2020 t&29/2020 Decon Pd 2- T ra nsition Fo llowing Shutdown 378da ys t 0/30/2020 04/08/2022 Oecon Po 2 Begins Odays 10/29/2020 10J29/2020 Submit Notifica1ion'ol Cessalion o! Operations Odays 10J29/2020 10/29/2020

                                                                     ....,.

Submit Not11ical1on ol Fuel Removal from Vessel Oclay,s 11/1&'2020 11 / 18/2020 NAC Review of Pos1 -Shutdown L.ARs and ERs 220days 10/29/2020 06/31/2021 Pertorm Activation Analyses OI Reactor and lntemals 10f29/2020 00,02/2021 Volume Reduce Control Rod Blades, Fuel Channels, & LPRMs 90days 10/29/2020 03/02/2021 F\Jsh and Drain Non-Essential Systems t80days 00,03/2021 11 /09/2021 Pertorm Asbestos Abatement on Plant Systems 2200,y, 03/03/2021 01""'2022 Removal and Disposal ol Off Gas System Adsort>er JO days 03/03/2021 04/13/2021 Remove and Dispose of Hazardous Waste JO clays 11/24/2021 01/04/2022 Drain and Process Suppression Pool Water and H)'drolase Torus 90day, 07/07/2021 t1it>9/202t Decon Pd 2 Ends Oclays 04/08/2022 04/08/2022 Decon Pd 3 - SAFSTOR Preparetkms Oei.y Duri ng Fuel Transter 667days 04/0&/2022 10/29/2024 Decon Pd 3 Begins Odays 0008l20Z1 O<IOB/2022 Decon Pd 3 Ends Oclays 10/29/2024 10/29/2024 Oecon Pd 4 - Completion of SAFSTOR PrepareUons 240 days 10/29/2024 09/30/2025 Oecon Pd 4 Begins Odays 10/29/2024 10/29/2024 Remove and DisPoSe ol Spent Fuel Stora99 Racks 30days 10/30J2024 W1012024 Drain Spent Fuel Pool and Process Liquid Waste 180days 12/11/2024 06/19/2025 Flush and Drain Essential Systems FoUowing Fuel Pool Closure 60days 05/28/2025 0&'1912025 Removal and Disposal of Spent Resins, FiHer Media and Tank Sr 30 days 01.\120/2025 09/30/2025 Segment, Package and Dispose of Sperl! Fuel Pool Island Equip1 30 days 10,'30/2024 12/10/2024 General Area Cleanup SO days 06111/2025 09130/2025 Secure Si1e tor Dormancy 60 days 07/09/2025 09/30/2025 Decon Po 4 Ends Odays 09/30/2025 09/30/2025 Decon Pd 5 - Dor mancy During Ory Storage 8892 days 09/30/2025 10/30/2059 Decon Pd 5 Begins Bituminous Roof Replacement 20 year Bituminous Roof Replacemen1 40 year Decon Pd 5 Ends

                                                                     . ,.,.

Odays 90days Odays 09/30/2025 02/15r.!<MO lt,{)4/2054 10/J0/2059 09/30/2025 0&1912040 03/09/2055 10,'30/2059 Oecon Pd 6

• Dormancy Only Decon Pd 6 Begins Decon Pd 6 Ends 3627days Odays Odays 10J30J2059 10/30/2059 09/26/2073 09/26/2073 10/J0/2059 09/26/2073
• O.Con Pd 7
• Decommissioning Plennlng During Dofmancy Decon Pd 7 Begins o,.,.

37Sdays 09/26/2073 09/26/2073 03/07/2075

                                                                                             °"'2612073 ln1ta1 Office Trailef Comple)(                                     600,y,    09/26/2073     12/18/2073 Select Decommissioning General Contractor                        220,.,. 09/26/2073    07/30/2074 Pos1 SAFSTOR Decommissioning Planning                              90days    09/26/2073    01/29/2074 Planring OI Pos1 SAFSTOR Si1e Charactenza\Jon                      90days    09/26/2073     01/29/2074 Prepare lntegraled Work Sequence and Schedule !or OecommlS!        60days    09/26/2073     12/18/2073

Duane Arnold Energ y Center Project Schedule for SAFSTOA, 2030 DOE Acceptance, Dry Storage s repare missiomngActivily peci cations 22 days 126103 07/30/20 4 ' ' '" ' " ' Prepare Delailed Wor1!. Procedures for Decommissioning 220 days 09/26/2073 07/30/2074 Updaie Decommissioning Cos1 Estlmaie(OCEJ 90days 01/30/2074 06!0</2074 Update Post*ShU1down Decommissioning Activities Report (PSD, 90day, 01/30/2074 06/04/2074 Planning and Design ol Site Revitalization 120days 01130/207 4 07116/2074 Planning and Design Rail Spur Upgrade 120days 0 1/30/2074 0 711612074 Planntng and Design Cold & Dark She Aepowering 120days 0 1/30/207 4 07/16/2074 Develop Elfuent Management Plan JOdays 09/2fi/207J 11/U6/'l073 Design Liquid Radwaste Treatment and Oemin Makeup Water S) 60day, 09/2fi/207J 12/18/2073 Prepare and Subrrnt Enwonmenlal Permits 220days 09/2612073 07/30/2074 Design c:omainmenl Access Modifications 90days 09/20/2073 0 1/29/207" Design and Procure RPV/RVl Segmema1ion Tooling and Equipm, 18mons 09/26/2073 03/07/2075 Select Shipping C8skS and Obtain Sh1pi:,ing Permits 40 days 0 1/11/2075 03J07/2075 Purchase Dry S1orage Modules tor GTCC Was1e 320days 12/15/2073 03J07/2075 Decon Pd 7 Ends Oday, 03/07!2075 03/07/2075 Oecon Pd 8

• Internals Segmenta1ion and Sit* Preparations 355deya 03/07/2075 07/16/2076 Oeoon Pd 8 Begins Odays 03/07/2075 03/07/2075 RevitaMze Srte lnlraslructure 180days 03/08/2075 11 /1 ,4/2075 lmplemeot Cold & Dark 180days 03/08/2075 11/14/2075 lnstal Liquid Radwaste Treatmen1 s"ystem 90days 03,1)812()75 07/11/2075 Install Demin Makel.Ip Water Sys\einlor RVI SeQem&ntation 60 day, 03/08/2075 05f30/2075 Per1orm Posl-SAF STOR Sile Characierizalion 120days 03/0&12075 08/22/2075 Prepare License Termination Plan (L TP) 220days 08/23/2075 06/2512076 Subm~ LTP to NRC !or review Odays 06/2Sf2076 06/25/2076 Segmen1 and Dispose ol DryNell Head 60days 03/0812075 05/30/2075 Rellood RPV and Steam Separalor Pool !or RVl Segmentation 30Mys 05131/2075 07/11/2075 Remove and Dispose of Rx Head JO days 03/0&'2075 04/1 812075 Tesl Special Cunll'lg and Handfing Equipment and Tram Opera!OI 45Mys 07/12/2075 097 1 2/2075 Fll'laU e Internals and Vessel Segmenbng Delails 25days 0&<>9/2075 09/12/2075 Segment. Package and Ship Reac,or lnlemals 220days 09/13/2075 07/1 &2076 RVI GTCC Wasle Tr'insponahon and Disposal 15days 06/26/2076 07ii612076 Construct New Change Rooms, Ho! Laundry, Wasle Slaging Are. 90day, 0311312()76 07f1 6/2076 Modify Containment Access 90oa,. 03/13/2076 07f1 6/2076 Upgrade Ral Spur 220days 09/1 3/2075 07/ 16/2076 lnstal Truck Radiological Monitomg System 60 days 04/24/2076 07/1 6/2076 Decon Pd 8 Ends Odays 07/1 6/2076 07/1 6/2076 O.Con Pd 9
• Mato,r Component end Systems Removal

                                                                    ... ,.,,

480 days 07(16/2076 05/19/2078 Decon Pd 9 Begins Oday, 0711 6/2076 0711 6/2076 Procure Non-Engineered Standard Equipment 07/1 7/2076 04/2 1/2078 NRC Review and Approval of Licen59Termination Plan 380days 07/17/2076 121J0120n Remove, Package and Dispose of Non-Essenlial Sys1ems 480days 071'1712076 05119/2078 Segment, Package and Dispose of Nuclear Steam Supply Systen 220days 07/ 16/2077 05119/2078 Remove, Package and Dispose of Remaining Aciive Plant Syster 220days 07/16/2077 05119/2078 Remove and Dispose ol Control Rod Drives 60days 07/1 7/2076 10/08/2076 Remove and Dispose ol Shield Plugs, Pool Plugs and Stud Ten s! 15days 07/1 7/2076 08."6/2076 ReaClor Vessel Insulation Removal and Disposal 10days 09/2512076 10/08/2076 Segment. Package°and Ship AeactOf PreisufeVessel 180days 1DI09/2076 06111rion Drain Sleam Separa1or Pool and Process liquid Waste 90day, 07/1 7/2076 111'1 9/2076 TranspcM1ation and DisposaTot Liquid Aadwaste Filters and Resu 15days 11/20/2076 12/10/2076 Removal and Disposal of Sacrificial Shield Wall and Reac1or Ped 06/1enon 09/09/2077 Segment, Package and Dispose of Refueling Bridge Removal and Disposal of Lead Shielding

                                                                      '°"""

15days JO days 06/1 8/2077 09/10/2077 07/08/2077 10/21/2077 Oec:on Pd 9 Ends

                                                                                                                                                       .

Odays 05/1 9/2078 05119/2078 Decon Pd 10

• Building Decontamlna11on 423.7d*ys 05/19/2078 01,03/2080 Oec:on Pd 10 Begins Odays 05/19/2078 05/1 9/2078 Procure Non-Engineered Standard Equipment 400days 05/20/2078 11/30/2079 Decon ReaClor Bu~ding 200days 05/20/2078 02/23/2079 Oecon Turbine Building 130days 05/20/2078 11/17/2078

                                                                                                                                                      '

Decon Radwaste Building 90 ..,. 05/20/2078 09/22/2078 Deoon HPCI and RCIC Building 90 day, 09/23/2078 01/26/2079 Oec:on Adm1nis1ra1ion Building 10 days 01/27/2079 02,'09/2079 Oecon Ott-Gas Retenlion Building 10days 02/10/2079 02/23/2079

Duane Arno ld Energy Center Project Schedule for SAFSTOR, 2030 DOE Acceptance , Dry Storage

                                                                                                                       '"   t H I 1 17
                                                                                                                                       '

20days 30days " 02/24/2079 04to6/2079 SegrT,ent, Padlage and Oisposeoi caitamiria1ed Decon Equipm 10days 04/07/2079 o:il20/2079 Remove UndergrOJnd S1orrn Drains and Mamoles 90days 09/23/2078 01/26/2079 Tral"lsponabonind Disposal ol Liquid Radwas1e Filters and Resil 15days 04/21/2079 05/11 /2079 Demolish Was1e S1aging Area 20day, 04/21/2079 05/18/2079 Fria1S1atus SurveylorS1ruciures 320 days 10/12/2078 0 1/03/2080 Prial S1aius Survey lor Land Ateas 320 days 10/12/2078 0 1/03/2080 Oecon Pd 10 Ends Odays 01')3/2080 01/03/2080 Decon Pd 11

• Ucense TermlnaUon 186days 01/03/2080 09/1 9/2080 Oecon Pd 11 Begins Odays 01/03/2080 01/03/2080 Prepare FSS Repon 60day, 01 /0312080 03/27/2080 NRC Review and Approval of FSS Repon 6mons 03/27/2080 09!19/2080 Decon Pa 11 Ends Odays 09/19/2080 09/19/2080 Odays 10/29/2080 10/29/2080 Gm Pd 1
• Clea n BuUdlng Oemolltk>n During Oecommlsslonlng 400 days 06/22/2078 01 /03/2080 Gm Pd 1 BeQins Odays 06/22/2078 0&'22/2078 Prepare S~e Res1ora11on Demolition Plan and Schedule 60day, 06'22/2078 09/1412078 Obta.n Reqund Oemol~IOl'I Pennhs 90day, 09/14/2078 01 /1 8/2079 Clean Buik:ll"lg Demoli1IOl'I Eq1,11pment 400days 06/22/2078 01/03/2080 Per1orm Pre*Demohtion Asbes10SAba1emen1 60days 06/22/2078 09/14/2078 Remove and Dispose ol Underground Storage Tanks 15days 06/22/2078 07113/2078 Demolish Non*Essential Structures 90 .... 09/14/2078 01 /18/2079 Demolish Training Cen1er 20 day, 01 /1 8/2079 02/15/2079 Demolish Planl Support Cenler and New S11e Support Building 30 .... 02/15/2079 03/29/2079 Demolish Cooling Towers and Related Structures 30days 03/29/2079 05/10/2079 Demolish Existing Was1a Water Trealmeflt 20days 05/10/2079 06/07/2079 Demolish Intake and Discharge Structures 60daY1 06/0712079 ""'30/2079 Demolish Data Acquisillon and Technical Support Buildi'lg 30 days 01/18/2079 03/01/2079 OemoltSh Guard Facility 15days 0:Wl/2079 03/22/2079 Demolish Control and Admin111rative Buildings 30days 03/01/2079 04!1 2/2079

                                                                                                                                                       ..

Demolish Turtine Buik:ling 80 days 04/12/2079 08.l02/2079 Demolish low*Leval Radwasle Building SO days 04112/2079 08/02!2079 Demolish HPCI and RCIC Building 20days 08/02/2079 08/30/2079 Demolish Reactor BuHding 11odays 08/02/2079 01 /03/2080 Demolish Ott*Gas Stack 30days 11/22/2079 01/03/2080 Demolish Misc Founoaborls 30days 11/22/2079 01/03/2080 Gm Pd 1 Ends Odays 0 1l0J/2080 01/03/2080 1. G m Pd 2 - Stt.e AestoraUon 90days 01/03/2080 05Klll/2060 Gm Pd2 Begins Oday$ 01/0J/2080 0 1/03/2080 Site Res1ora1ion Equipmen1 90d8y, 01/03/2080 05Kllll2060 D Remove Temporary Structures 25days 01 /03/2080 02,'()7/2080 Fll'lish Grading and Re*Vegetale Site 90day, 01/03/2080 OMlS/2080 Gm Pd 2 Ends Odays 05/08/2080 05108!2080

2018 License Termination and ISFSI D&D Cost Document No. 164053-DCE-025 Estimate for the Duane Arnold Energy Center Revision 0 AppendixD Detailed Cost Table

Table 1 Duane Arnold SAFSTOR, 2030 DOE Acceptance, Utility and DGC License Status Early Shutdown Unit !Shut Down: 10/30/2020 Decommissioning Alternative SAFSTOR Fuel Pool Systems Modified Unit 2 Shut Down: Spent Fuel Alternative Dry Repository Opening Date: 1/1/2030 2018 Dollars in Thousands No Item Description Labor Equipment Disposal Other Contingency Total A. Li~ense Termination DeconPd 1 SAFSTOR Planning Prior to Shutdown Distributed 1.01 Planning of Historical Site Assessment (HSA) and Scoping Survey $233 $4 $0 $0 $31 $269 1.02 PerformHSA $207 $2 $0 $0 $27 $236 1.03 Perform Scoping Survey $249 $122 $0 $565 $122 $1,058 1.04 Perform SAFSTOR Planning and Design $481 $29 $0 $0 $66 $576 1.05 NRC Review of PS DAR and DCE $0 $0 $0 $264 $34 $298 1.06 Preparation of SAFSTOR License Documents $2,741 $15 $0 $165 $380 $3,301 1.07 Prepare SAFSTOR Integrated Work Schedule . $78 $9 $0 $0 $11 $97 1.08 Prepare SAFSTOR Activity Specifications $490 $4 $0 $0 $64 $558 1.09 Prepare Detailed SAFSTOR Work Procedures $764 $0 $0 $0 $99 $864 1.10 Perform Part 37 and SNM Assessment $0 $0 $0 $50 $7 $57 1.11 Planning for Asbestos Abatement $137 $2 $0 $0 $18 $157 Distributed Subtotal $5,380 $187 $0 $1,044 $859 $7,471 Undistributed 1.01 Utility Staff $3,557 $0 $0 $0 $462 $4,020 1.03 Security $147 $0 $0 $0 $22 $169 1.16 Workers Comprehensive Insurance $0 $5 $0 $0 $1 $6 Undistributed Subtotal $3,705 $5 $0 $0 $485 $4,195 DeconPd 1 Subtotal $9,085 $192 $0 $1,044 $1,345 $11,666 Page 1 of 15

Table 1 Duane Arnold SAFSTOR, 2030 DOE Acceptance, Utility and DGC License Status Early Shutdown Unit !Shut Down: 10/30/2020 Decommissioning Alternative SAFSTOR Fuel Pool Systems Modified Unit 2 Shut Down: Spent Fuel Alternative Dry Repository Opening Date: 1/1/2030 2018 Dollars in Thousands No Item Description Labor Equipment Disposal Other Contingency Total DeconPd2 Transition Following Shutdown Distributed 2.01 Submit Notification of Cessation of Operations $0 $0 $0 $0 $0 $0 2.02 Submit Notification of Fuel Removal from Vessel $0 $0 $0 $0 $0 $0 2.03 NRC Review of Post-Shutdown LARs and ERs $0 $0 $0 $564 $73 $637 2.04 Perform Activation Analyses of Reactor and Internals $49 $4 $0 $308 $47 $408 2.05 Volume Reduce Control Rods, Fuel Channels and LPRMS $1,744 $672 $16,716 $0 $4,400 $23,533 2.06 Flush and Drain Non-Essential Systems $44 $8 $1,016 $0 $246 $1,313 2.07 Perform Asbestos Abatement on Plant Systems $750 $319 $1,096 $0 $498 $2,663 2.08 Removal and Disposal of Off Gas System Adsorber $28 $28 $3,175 $0 $743 $3,974 2.09 Remove and Dispose of Hazardous Waste $0 $0 $0 $185 $28 $213 2.10 Drain and Process Suppression Pool Water and Hydrolase Torus Walls $0 $0 $0 $0 $0 $0 Distributed Subtotal $2,614 $1,032 $22,004 $1,057 $6,035 $32,742 Undistributed I.OJ Utility Staff $33,759 $0 $0 $0 $4,389 $38,148 1.02 Utility Staff HP Supplies $0 $835 $0 $0 $125 $960 1.04 Nuclear Property and Liability Insurance $0 $0 $0 $389 $58 $448 1.05 Non-Nuclear Insurance $0 $0 $0 $65 $10 $75 1.06 Property Taxes $0 $0 $0 $144 $22 $165 1.07 NRC Annual Fees - LT $0 $0 $0 $664 $100 $764 1.08 Materials and Services $0 $4,657 $0 $0 $699 $5,356 1.09 Energy $0 $0 $0 $3,464 $520 $3,983 1.10 Environmental Permits and Fees $0 $0 $0 $11 $2 $13 1.13 DAW Disposal $0 $0 $45 $0 $7 $52 1.14 Severance $7,786 $0 $0 $0 $1,168 $8,954 1.15 Retention $443 $0 $0 $0 $66 $509 1.16 Workers Comprehensive Insurance $0 $50 $0 $0 $7 $57 Undistributed Subtotal $41,988 $5,542 $45 $4,738 $7,172 $59,485 Page2 of 15

Table 1 Duane Arnold SAFSTOR, 2030 DOE Acceptance, Utility and DGC License Status Early Shutdown Unit !Shut Down: 10/30/2020 Decommissioning Alternative SAFSTOR Fuel Pool Systems Modified Unit 2 Shut Down: Spent Fuel Alternative Dry Repository Opening Date: 1/1/2030 2018 Dollars in Thousands No Item Description Labor Equipment Disposal Other Contingency Total DeconPd2 Subtotal $44,602 $6,574 $22,049 $5,794 $13,207 $92,226 DeconPd3 SAFSTOR Preparation Delay During Spent Fnel Pool Operations Undistributed 1.01 Utility Staff $6,087 $0 $0 $0 $791 $6,878 1.02 Utility Staff HP Supplies $0 $278 $0 $0 $42 $320 1.04 Nuclear Property and Liability Insurance $0 $0 $0 $237 $35 $272 1.05 Non-Nuclear Insurance $0 $0 $0 $116 $17 $134 1.06 Property Taxes $0 $0 $0 $256 $38 $294 1.07 NRC Annual Fees - LT $0 $0 $0 $710 $106 $816 1.08 Materials and Services $0 $843 $0 $0 $126 $969 1.09 Energy $0 ~o $0 $2,623 $393 $3,016 1.10 Environmental Permits and Fees $0 $0 $0 $20 $3 $23 1.13 DAW Disposal $0 $0 $7 $0 $1 $8 1.14 Severance $9,550 $0 $0 $0 $1,433 $10,983 1.16 Workers Comprehensive Insurance $0 $9 $0 $0 $1 $10 Undistributed Subtotal $15,637 $1,130 $7 $3,962 $2,989 $23,724 DeconPd3 Subtotal $15,637 $1,130 $7 $3,962 $2,989 $23,724 Page 3 of 15

Table 1 Duane Arnold SAFSTOR, 2030 DOE Acceptance, Utility and DGC License Status Early Shutdown Unit !Shut Down: 10/30/2020 Decommissioning Alternative SAFSTOR Fuel Pool Systems Modified Unit 2 Shut Down: Spent Fuel Alternative Dry Repository Opening Date: 1/1/2030 2018 Dollars in Thousands No Item Description Labor Equipment Disposal Other Contingency Total DeconPd4 Completion of SAFSTOR Preparations Distributed 4.01 Remove and Dispose of Spent Fuel Storage Racks $124 $281 $1,683 $0 $480 $2,569 4.02 Drain Spent Fuel Pool and Process Liquid Waste $0 $0 $0 $0 $0 $0 4.03 Flush and Drain Essential Systems Following Fuel Pool Closure $27 $14 $1,016 $0 $243 $1,300 4.04 Removal and Disposal of Spent.ResiIJs, Filter Media and Tank Sludge $28 $28 $2,540 $0 $597 $3,194 4.05 Segment, Package and Dispose of Spent Fuel Pool Island Equipment $7 $2 $190 $0 $46 $245 4.06 General Area Cleanup $1,511 $694 $195 $0 $552 $2,952 4.07 Secure Site for Dormancy Period $0 $0 $0 $1,845 $277 $2,122 Distributed Subtotal $1,698 $1,019 $5,624 $1,845 $2,195 $12,381 Undistributed LOI Utility Staff $2,187 $0 $0 $0 $284 $2,472 1;02 Utility Staff HP Supplies $0 $100 $0 $0 $15 $115 1.04 Nuclear Property and Liability Insurance $0 $0 $0 $73 $11 $84 1.05 Non-Nuclear Insurance $0 $0 $0 $42 $6 $48 1.06 Property Truces $0 $0 $0 $92 $14 $106 1.07 NRC Annual Fees - LT $0 $0 $0 $425 $64 $489 1.08 Materials and Services $0 $303 $0 $0 $45 $348 1.09 Energy $0 $0 $0 $497 $75 $572 LIO Environmental Permits and Fees $0 $0 $0 $7 $1 $8 1.13 DAW Disposal $0 $0 $23 $0 $3 $26 1.14 Severance $4,550 $0 $0 $0 $683 $5,233 1.16 Workers Comprehensive Insurance $0 $3 . $0 $0 $0 $4 Undistributed Subtotal $6,737 $406 $23 $1,137 $1,202 $9,505 DeconPd4 Subtotal $8,435 $1,425 $5,647 $2,981 $3,397 $21,886 Page4 of 15

Table 1 Duane Arnold SAFSTOR, 2030 DOE Acceptance, Utility and DGC License Status Early Shutdown Unit !Shut Down: 10/30/2020 Decommissioning Alternative SAFSTOR Fuel Pool Systems Modified Unit 2 Shut Down: Spent Fuel Alternative Dry Repository Opening Date: 1/1/2030 2018 Dollars in Thousands No Item Description Labor Equipment Disposal Other Contingency Total DeconPdS Dormancy With Dry Storage Distributed 5.01 Bituminous Roof Replacement - 20 year $421 $106 $31 $0 $84 $642 5.02 Bituminous Roof Replacement - 40 year $421 $106 $31 $0 $84 $642 Distributed Subtotal $842 $212 $61 $0 $167 $1,283 Undistributed I.OJ Utility Staff $24,870 $0 $0 $0 $3,233 $28,104 1.02 Utility Staff HP Supplies $0 $1,554 $0 $0 $233 $1,787 1.04 Nuclear Property and Liability Insurance $0 $0 $0 $2,705 $406 $3,111 I.OS Non-Nuclear Insurance $0 $0 $0 $775 $116 $891 1.06 Property Ta,ces $0 $0 $0 $1,491 $224 $1,715 1.06 Property Ta,ces $0 $0 $0 $525 $79 $604 1.07 NRC Annual Fees - LT $0 $0 $0 $9,447 $1,417 $10,865 1.08 Materials and Services $0 $2,952 $0 $0 $443 $3,395 1.09 Energy $0 $0 $0 $8,549 $1,282 $9,831 I.IQ Environmental Permits and Fees $0 >$0 $0 $269 $40 $310 1.13 DAW Disposal $0 $0 $30 $0 $5 $35 1.14 Severance $668 $0 $0 $0 $100 $768 1.16 Workers Comprehensive Insurance $0 $32 $0 $0 $5 $36 Undistributed Subtotal $25,538 $4,538 $30 $23,762 $7,583 $61,451 DeconPdS Subtotal $26,380 $4,750 $92 $23,762 $7,750 $62,734 Page 5 of 15

Table 1 Duane Arnold SAFSTOR, 2030 DOE Acceptance, Utility and DGC License Status Early Shutdown Unit !Shut Down: 10/30/2020 Decommissioning Alternative SAFSTOR Fuel Pool Systems Modified Unit 2 Shut Down: Spent Fuel Alternative Dry Repository Opening Date: 1/1/2030 2018 Dollars in Thousands No Item Description Labor Equipment Disposal Other Contingency Total DeconPd 6 Donnancy Only Undistributed 1.01 Utility Staff $10,150 $0 $0 $0 $1,319 $11,469 1.02 Utility Staff HP Supplies $0 $634 $0 $0 $95 $729 1.03 Security $5,209 $0 $0 $0 $781 $5,991 1.04 Nuclear Property and Liability Insurance $0 $0 $0 $4,416 $662 $5,078 1.05 Non-Nuclear Insurance $0 $0 $0 $316 $47 $364 1.06 Property Taxes $0 $0 $0 $348 $52 $400 1.07 NRC Annual Fees - LT $0 $0 $0 $3,855 $578 $4,434 1.08 Materials and Services $0 $2,651 $0 $0 $398 $3,048 1.09 Energy $0 $0 $0 $4,299 $645 $4,944 1.10 Environmental Permits and Fees $0 $0 $0 $110 $16 $126 1.13 DAW Disposal $0 $0 $12 $0 $2 $14 1.14 Severance $592 $0 $0 $0 $89 $681 1.16 Workers Comprehensive Insurance $0 $28 $0 $0 $4 $33 Undistributed Subtotal $15,951 $3,313 $12 $13,345 $4,690 $37,311 DeconPd 6 Subtotal $15,951 $3,313 $12 $13,345 $4,690 $37,311 Page 6 of 15

Table 1 Duane Arnold SAFSTOR, 2030 DOE Acceptance, Utility and DGC License Status Early Shutdown Unit !Shut Down: 10/30/2020 Decommissioning Alternative SAFSTOR Fuel Pool Systems Modified Unit 2 Shut Down: Spent Fuel Alternative Dry Repository Opening Date: 1/1/2030 2018 Dollars in Thousands No Item Description Labor Equipment Disposal Other Contingency Total DeconPd 7 Decommissioning Planning During Dormancy Distributed 7.01 Install Office Trailer Complex $0 $0 $0 $3,543 $532 $4,075 7.02 Select Decommissioning General Contractor $351 $5 $0 $0 $46 $403 7.03 Post SAFSTOR Decommissioning Planning $225 $0 $0 $0 $29 $254 7.04 Planning Post SAFSTOR Site Characterization $131 $2 $0 $0 $17 $151 7.05 Prepare Integrated Work Sequence and Schedule for Decommissioning $179 $0 $0 $0 $23 $202 7.06 Prepare Decommissioning *Activity Specifications $2,201 $19 $0 $0 $289 $2,508 7.07 Prepare Detailed Work Procedures for Decommissioning $2,154 $0 $0 $0 $280 $2,434 7.08 Update Decommissioning Cost Estimate (DCE) $281 $1 $0 $0 $37 $318 7.09 Update Post-Shutdown Decommissioning Activities Report (PSDAR) $229 $1 $0 $0 $30 $259 7.10 Planning and Design of Site Revitilization $1,038 $18 $0 $0 $137 $1,193 7.11 Planning and Design Rail Spur Upgrade $252 $10 $0 $0 $34 $296 7.12 Planning and Design Cold & Dark Site Repowering $593 $7 $0 $0 $78 $677 7.13 Develop Effluent Management Plan $93 $0 $0 $0 $12 $105 7.14 Design Liquid Radwaste Treatment and Demin Makeup Water Systems $175 $0 $0 $0 $23 $198 7.15 Prepare and Submit Environmental Permits $112 $0 $0 $0 $15 $126 7.16 Design Containment Access Modifications $227 $3 $0 $0 $30 $260 7.17 Design and Procure RPV/RVI Segmentation Tooling and Equipment $2,068 $19,000 $0 $0 $2,739 $23,807 7.18 Select Shipping Casks and Obtain Shipping Permits $38 $0 $0 $0 $5 $43 7.19 Purchase Canisters for GTCC Waste $0 $1,588 $0 $0 $238 $1,826 Distributed Subtotal $10,345 $20,654 $0 $3,543 $4,593 $39,136 Undistributed 1.01 Utility Staff $4,470 $0 $0 $0 $581 $5,051 1.02 Utility Staff HP Supplies $0 $157 $0 $0 $23 $180 1.03 Security $540 $0 $0 $0 $81 $621 1.04 Nuclear Property and Liability Insurance $0 $0 $0 $458 $69 $527 1.05 Non-Nuclear Insurance $0 $0 $0 $33 $5 $38 Page 7 of 15

Table 1 Duane Arnold SAFSTOR, 2030 DOE Acceptance, Utility and DGC License Status Early Shutdown Unit !Shut Down: 10/30/2020 Decommissioning Alternative SAFSTOR Fuel Pool Systems Modified Unit 2 Shut Down: Spent Fuel Alternative Dry Repository Opening Date: 1/1/2030 2018 Dollars in Thousands No Item Description Labor Equipment Disposal Other Contingency Total 1.06 Property Taxes $0 $0 $0 $36 $5 $41 1.07 NRC Annual Fees -LT $0 $0 $0 $400 $60 $460 1.08 Materials and Services $0 $744 $0 $0 $112 $855 1.09 Energy $0 $0 $0 $661 $99 $760 1.10 Environmental Pennits and Fees $0 $0 $0 $11 $2 $13 1.11 Decommissioning General Contractor Staff $2,599 $0 $0 $0 $338 $2,936 1.12 DGC HP Supplies $0 $43 $0 $0 $6 $50 1.13 DAW Disposal $0 $0 $4 $0 $1 $4 1.16 Workers Comprehensive Insurance $0 $8 $0 $0 $1 $9 Undistributed Subtotal $7,609 $951 $4 $1,600 $1,383 $11,547 DeconPd 7 Subtotal $17,954 $21,605 $4 $5,143 $5,976 $50,682 Page 8 of 15

Table 1 Duane Arnold SAFSTOR, 2030 DOE Acceptance, Utiµty and DGC License Status Early Shutdown Unit !Shut Down: 10/30/2020 Decommissioning Alternative SAFSTOR Fuel Pool Systems Modified Unit 2 Shut Down: Spent Fuel Alternative Dry Repository Opening Date: 1/1/2030 2018 Dollars in Thousands No Item Description Labor Equipment Disposal Other Contingency Total DeconPdS Internals Segmentation and Site Preparations Distributed 8.01 Revitalize Infrastructure $0 $0 $0 $17,683 $2,652 $20,336 8.02 Implement Cold & Dark $3,095 $5,023 $0 $0 $1,218 $9,336 8.03 Install Liquid Radwaste Treatment System $0 $0 $0 $1*,750 $263 $2,013 8.04 Install Deroin Makeup Water System for RVI Segementation $0 $0 $0 $313 $47 $360 8.05 Perform Post-SAFSTOR Site Characterization $367 $250 $0 $0 $80 $698 8.06 Prepare License Termination Plan (LTP) $331 $10 $0 $0 $44 $385 8.07 Segment and Dispose of Drywell Head $142 $31 $49 $0 $51 $274 8.08 Reflood RPV and Steam Separator Pool for RVI Segmentation $129 $80 $0 $0 $48 $257 8.09 Remove and Dispose of Rx Head $151 $26 $757 $0 $271 $1,205 8.10 Test Special Cutting and Handling Equipment and Train Operators $1,335 $217 $0 $0 $202 $1,753 8.11 Finalize Internals and Vessel Segmenting Details $23 $0 $0 $0 $3 $26 8.12 Segment, Package and Ship Reactor Internals $4,247 $1,449 $12,486 $0 $5,578 $23,760 8.13 RV! GTCC Waste Transportation and Disposal $0 $0 $5,674 $2,288 $1,648 $9,610 8.14 Construct New Change Rooms, Hot Laundry, Waste Staging Area $0 $1,192 $0 $0 $179 $1,371 8.15 Modify Containment Access $454 $837 $0 $0 $194 $1,484 8.16 Upgrade Rail Spur $0 $0 $0 $2,410 $362 $2,772 8.17 Install Truck Radiological Monitoring System $0 $0 $0 $500 $75 $575 Distributed Subtotal $10,273 $9,115 $18,966 $24,944 $12,914 $76,212 Undistributed 1.01 Utility Staff $12,716 $0 $0 $0 $1,653 $14,369 1.02 Utility Staff HP Supplies $0 $533 $0 $0 $80 $613 1.03 Security $510 $0 $0 $0 $76 $586 1.04 Nuclear Property and Liability Insurance $0 $0 $0 $432 $65 $497 1.05 Non-Nuclear Insurance $0 $0 $0 $62 $9 $71 1.06 Property Taxes $0 $0 $0 $34 $5 $39 1.07 NRC Annual Fees - LT $0 $0 $0 $629 $94 $723 Page 9 of 15

Table 1 Duane Arnold SAFSTOR, 2030 DOE Acceptance, Utility and DGC License Status Early Shutdown Unit !Shut Down: 10/30/2020 Decommissioning Alternative SAFSTOR Fuel Pool Systems

• Modified Unit 2 Shut Down:

Spent Fuel Alternative Dry Repository Opening Date: 1/1/2030 2018 Dollars in Thousands No Item Description Labor Equipment Disposal Other Contingency Total 1.08 Materials and Services $0 $1,880 $0 $0 $282 $2,162 1.09 Energy $0 $0 $0 $727 $109 $836 1.10 Environmental Permits and Fees $0 $0 $0 $11 $2 $12 1.11 Decommissioning General Contractor Staff $18,350 $0 $0 . $0 $2,386 $20,736 1.12 DGC HP Supplies $0 $598 $0 $0 $90 $687 1.13 DAW Disposal $0 $0 $126 $0 $19 $145 1.16 Workers Comprehensive Insurance $0 $20 $0 $0 $3 $23 Undistributed Subtotal $31,576 $3,031 $126 $1,894 $4,873 $41,500 DeconPd 8 Subtotal $41,849 $12,147 $19,092 $26,838 $17,787 $117,713

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Page 10 of 15

Table 1 Duane Arnold SAFSTOR, 2030 DOE Acceptance, Utility and DGC License Status Early Shutdown Unit !Shut Down: 10/30/2020 Decommissioning Alternative SAFSTOR Fuel Pool Systems Modified Unit 2 Shut Down: Spent Fuel Alternative Dry Repository Opening Date: 1/1/2030 2018 Dollars in Thousands No Item Description Labor Equipment Disposal Other Contingency Total DeconPd9 Major Component and Systems Removal Distributed 9.01 Procure Non-Engineered Standard Equipment $0 $8,303 $0 $0 $1,079 $9,382 9.02 NRC Review and Approval of License Termination Plan $0 $0 $0 $1,078 $140 $1,218 9.03 Remove, Package and Dispose of Non-Essential Systems $12,884 $3,111 $12,412 $0 $6,534 $34,941 9.04 Segment, Package and Dispose of Nuclear Stearn Supply System $4,432 $1,445 $39,047 $0 $10,333 $55,257 9.05 Remove, Package and Dispose of Remaining Active Plant Systems $4,379 $1,359 $4,451 $0 $2,344 $12,533 9.06 Remove and Dispose of Control Rod Drives $330 $79 $1,585 $0 $458 $2,452 9.07 Remove and Dispose of Shield Plugs, Pool Plugs and Stud Tensioners $82 $58 $1,774 $0 $440 $2,354 9.08 Reactor Vessel Insulation Removal and Disposal $123 $21 $384 $0 $122 $650 9.09 Segment, Package and Ship Reactor Pressure Vessel $3,328 $1,394 $5,761 $0 $3,425 $13,908 9.10 Drain Dryer Separator Pool and Process Liquid Waste $0 $0 $0 $0 $0 $0 9.11 Transportation and Disposal of Liquid Radwaste Filters and Resins $13 $103 $272 $0 $89 $477 9.12 Removal and Disposal of Sacrificial Shield Wall and Reactor Pedestal $399 $606 $974 $0 $455 $2,433 9.13 Segment, Package and Dispose of Refueling Bridge $60 $13 $313 $0 $89 $475 9.14 Removal and Disposal of Lead Shielding $29 $8 $181 $0 $50 $267 Distributed Subtotal $26,058 $16,SOO $67,155 $1,078 $25,558 $136,349 Undistributed 1.01 Utility Staff $18,319 $0 $0 $0 $2,381 $20,701 1.02 Utility Staff HP Supplies $0 $1,648 $0 $0 $247 $1,895 1.03 Security $689 $0 $0 $0 $103 $792 1.04 Nuclear Property and Liability Insurance $0 $0 $0 $584 $88 $672 1.05 Non-Nuclear Insurance $0 $0 $0 $84 $13 $96 1.06 Property Taxes $0 $0 $0 $46 $7 $53 1.07 NRC Annual Fees - LT $0 $0 $0 $850 $128 $978 1.08 Materials and Services $0 $2,813 $0 $0 $422 $3,235 1.09 Energy $0 $0 $0 $834 $125 $960 1.10 Environmental Permits and Fees $0 $0 $0 $15 $2 $17 Page 11 of 15

Table 1 Duane Arnold SAFSTOR, 2030 DOE Acceptance, Utility and DGC License Status Early Shutdown Unit lShut Down: 10/30/2020 .Decommissioning Alternative SAFSTOR FJJel Pool Systems Modifi"4 Unit 2 Shut Down: Spent Fuel Alternative Dry Repository Opening Date: 1/1/2030 2018 Dollars in Thousands No Item Description Labor Equipment Disposal Other Contingency Total 1.11 Decommissioning General Contractor Staff $39,987 $0 $0 $0 $5;198 $45,186 1.12 DGC HP Supplies $0 $2,807 $0 $0 $421 $3,228 1.13 DAWDisposal $0 $0 $236 $0 $35 $271 1.16 Workers Comprehensive Insurance $0 $30 $0 $0 $5 $35 Undistributed Subtotal $58,995 $7,298 $236 $2,413 $9,175 $78,118 DeconPd9 Subtotal $85,053 $23,799 $67,391 $3,491 $34,733 $214,466 Page 12 of 15

Table 1 Duane Arnold SAFSTOR, 2030 DOE Acceptance, Utility and DGC License Status Early Shutdown *unit !Shut Down: 10/30/2020 Decommissioning Alternative SAFSTOR Fuel Pool Systems Modified Unit 2 Shut Down: Spent Fuel Alternative Dry Repository Opening Date: 1/1/2030 2018 Dollars in Thousands No Item Description Labor Equipment Disposal Other Contingency Total DeconPd 10 Building Decontamination Distrihuted 10.01 Procure Non-Engineered Standard Equipment $0 $1,453 $0 $0 $189 $1,642 10.02 Decon Reactor Building $4,057 $3,031 $9,241 $0 $3,756 $20,085 10.03 Decon Turbine Building $745 $1,046 $771 $0 $589 $3,151 10.04 Decon Radwaste Building $162 $201 $253 $0 $142 $758 10.05 Decon HPCI and RCIC Building $35 $53 $35 $0 $29 $152 10.06 Decon Administration Building $13 $7 $14 $0 $8 $42 10.07 Decon Off-Gas Retention Building $60 $25 $29 $0 $26 $141 10.08 Decon Low Level Radwaste Storage and Processing $287 $426 $361 $0 $247 $1,321 10.09 Decon Off-Gas Stack $69 $53 $188 $0 $71 $382 IO.IO Segment, Package and Dispose of Contaminated Decon Equipment and Tooling $24 $6 $172 $0 $46 $249 IO.II Remove Underground Storm Drains and Manholes $33 $30 $45 $0 $25 $133 10.12 Transportation and Disposal of Liquid Rad waste Filters and Resins $13 $3 $272 $0 $66 $354 10.13 Demolish Waste Staging Area $543 $322 $2,441 $0 $761 $4,067 10.14 Final Status Survey for Structures $4,564 $4,377 $0 $1,087 $1,304 $11,332 10.15 Final Status Survey for Land Areas $712 $392 $0 $0 $144 $1,248 Distributed Subtotal $11,318 $11,426 $13,823 $1,087 $7,402 $45,056 Undistributed 1.01 Utility Staff $13,175 $0 $0 $0 $1,713 $14,888 1.02 Utility Staff HP Supplies $0 $1,457 $0 $0 $219 $1,675 1.03 Security $609 $0 $0 $0 $91 $700 1.04 Nuclear Property and Liability Insurance $0 $0 $0 $516 $77 $594 1.05 Non-Nuclear Insurance $0 $0 $0 $74 $11 $85 1.06 Property Taxes $0 $0 $0 $41 $6 $47 1.07 NRC Annual Fees - LT $0 $0 $0 $751 $113 $864 1.08 Materials and Services $0 $2,099 $0 $0 $315 $2,414 1.09 Energy $0 $0 $0 $690 $104 $794 Page 13 of 15

Table 1 Duane Arnold SAFSTOR, 2030 DOE Acceptance, Utility and DGC License Status Early Shutdown Unit !Shut Down: 10/30/2020 Decommissioning Alternative SAFSTOR Fuel Pool Systems Modified Unit 2 Shut Down: Spent Fuel Alternative Dry Repository Opening Date: 1/1/2030 2018 Dollars in Thousands No Item Description Labor Equipment Disposal Other Contingency Total 1.10 Environmental Permits and Fees $0 $0 $0 $13 $2 $15 1.11 Decommissioning General Contractor Staff $29,651 $0 $0 $0 $3,855 $33,506 1.12 DGC HP Supplies $0 $2,071 $0 $0 $311 $2,382 1.13 DAW Disposal $0 $0 $168 $0 $25 $194 1.16 Workers Comprehensive Insurance $0 $23 $0 $0 $3 $26 Undistributed Subtotal $43,435 $5,650 $168 $2,086 $6,844 $58,184 DeconPd 10 Subtotal $54,754 $17,076 $13,991 $3,173 $14,246 $103,240 DeconPd 11 License Tennination Distributed 11.01 Prepare Final Status Survey Report $64 $2 $0 $0 $9 $74 11.02 NRC Review and Approval of FSS Report $0 $0 $0 $539 $70 $609 Distributed Subtotal $64 $2 $0 $539 $79 $683 Undistributed 1.01 Utility Staff $828 $0 $0 $0 $108 $936 1.03 Security $267 $0 $0 $0 $40 $307 1.04 Nuclear Property and Liability Insurance $0 $0 $0 $226 $34 $260 1.05 Non-Nuclear Insurance $0 $0 $0 $16 $2 $19 1.06 Property Taxes $0 $0 $0 $18 $3 $20 1.07 NRC Annual Fees -LT $0 $0 $0 $141 $21 $162 1.08 Materials and Services $0 $185 $0 $0 $28 $213 1.09 Energy $0 $0 $0 $4 $1 $5 I.I I Decommissioning General Contractor Staff $1,632 $0 $0 $0 $212 $1,844 1.16 Workers Comprehensive Insurance $0 $2 $0 $0 $0 $2 Undistributed Snbtotal $2,727 $187 $0 $405 $449 $3,768 DeconPd 11 Snbtotal $2,791 $189 $0 $944 $527 $4,451 A. License Termination Subtotal $322,491 $92,200 $128,284 $90,476 $106,647 $740,099 I Page 14 of 15

Table 1 Duane Arnold SAFSTOR, 2030 DOE Acceptance, Utility and DGC License Status Early Shutdown Unit lShut Down: 10/30/2020 Decommissioning Alternative SAFSTOR Fuel Pool Systems Modified Unit 2 Shut Down: Spent Fuel Alternative Dry Repository Opening Date: 1/1/2030 2018 Dollars in Thousands No Item Description Labor Equipment Disposal Other Contingency Total D.ISFSID&D ISFSI D&D Pd 1 ISFSI D&D Planning Distributed 21.01 Preparation of ISFSI Portion of LTP $185 $0 $0 $0 $24 $209 21.02 NRC Review ofISFSI Portion LTP $0 $0 $0 $44 $6 $50 Distributed Subtotal $185 $0 $0 $44 $30 $259 Undistributed 4.01 Utility Staff $556 $0 $0 $0 $72 $628 Undistributed Subtotal $556 $0 $0 $0 $72 $628 ISFSID&DPd Subtotal $741 $0 $0 $44 $102 $887 ISFSI D&D Pd 2 ISFSI Final Status Survey Distributed 22.01 Final Status Survey of ISFSI $144 $50 $0 $0 $25 $220 22.02 Preparation of FSS Report and NRC Review $101 $0 $0 $33 $17 $151 Distributed Subtotal $245 $50 $0 $33 $43 $371 Undistributed 4.01 Utility Staff $338 $0 $0 $0 $44 $382 Undistributed Subtotal $338 $0 $0 $0 $44 $382 ISFSID&DPd Subtotal $584 $50 $0 $33 $87 $754 D.ISFSID&D Subtotal $1,324 $50 $0 $77 $189 $1,640 Scenario No. 2 Total $323,815 $92,250 $128,284 $90,553 $106,836 $741,739 Page 15 of 15

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2018 License Termination and ISFSI D&D Cost Document No. 164053-DCE-025 Estimate for the Duane Arnold Energy Center Revision 0 AppendixE Annual Cost by Account Table

Duane Arnold Annual Cost By Account SAFSTOR, 2030 DO:? Acceptance, Utility and DGC Unit No: Unit 1 2018 Dollars in Thousands Year License ISFSI Total Termination Demolition 2019 $4,099 $0 $4,099 2020 $29,127 $0 $29,127 2021 $61,198 $0 $61,198 2022 $24,100 $0 $24,100 2023 $4,969 $0 $4,969 2024 $9,600 $0 $9,600 2025 $17,270 $0 $17,270 2026 $2,201 $0 $2,201 2027 $1,827 $0 $1,827 2028 . $1,827 $0 $1,827 2029 $1,827 $0 $1,827 2030 $1,884 $0 $1,884 2031 $1,770 $0 $1,770 2032 $1,770 $0 $1,770 2033 $1,770 $0 $1,770 2034 $1,770 $0 $1,770 2035 $1,770 $0 $1,770 2036 $1,770 $0 $1,770 2037 $1,770 $0 $1,770 2038 $1,770 $0 $1,770 2039 $1,770 $0 $1,770 2040 $2,411 $0 $2,411 2041 $1,770 $0 $1,770 2042 $1,770 $0 $1,770 2043 $1,770 $0 $1,770 2044 $1,770 $0 $1,770 J 2045 $1,770 $0 $1,770 2046 $1,770 $0 $1,770 2047 $1,770 $0 $1,770 2048 $1,770 $0 $1,770 2049 $1,770 $0 $1,770 2050 $1,770 $0 $1,770 2051 $1,770 $0 $1,770

               , 2052                  $1,770                 $0    $1,770 2053                  $1,770                 $0    $1,770 2054                  $2,065                 $0    $2,065 Page 1 of2

Duane Arnold Annual Cost By Account SAFSTOR, 2030 DOE Acceptance, Utility and DGC Unit No: Unit 1 2018 Dollars in Thousands Year License ISFSI Total Termination Demolition 2055 $2,116 $0 $2,116 2056 $1,770 $0 $1,770 2057 $1,770 $0 $1,770 2058 $1,770 e$0 $1,770 2059 $2,159 $0 $2,159 2060 $3,077 $0 $3,077 2061 $2,634 $0 $2,634 2062 $2,634 $0 $2,634 2063 $2,634 $0 $2,634 2064 $2,634 $0 $2,634 2065 $2,634 $0 $2,634 2066 $2,634 $0 $2,634 2067 $2,634 $0 $2,634 2068 $2,634 $0 $2,634 2069 $2,634 $0 $2,634 2070 $2,634 $0 $2,634 2071 $2,634 $0 $2,634 2072 $2,634 $0 $2,634 2073 $15,319 $0 $15,319 2074 $32,572 $0 $32,572 2075 $75,626 $184 $75,811 2076 $88,570 $403 $88,973 2077 $117,141 $303 $117,444 2078 $101,050 $731 $101,780 2079 $57,385 $19 $57,404 2080 $4,828 $0 $4,828 Total $740,099 $1,640 $741,739 Page 2 of2}}