NG-23-0001, 2023 Annual Decommissioning and Spent Fuel Management Funding Status Report

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2023 Annual Decommissioning and Spent Fuel Management Funding Status Report
ML23088A206
Person / Time
Site: Duane Arnold, Maine Yankee  NextEra Energy icon.png
Issue date: 03/27/2023
From: Both J
NextEra Energy Duane Arnold
To:
Office of Nuclear Material Safety and Safeguards
References
NG-23-0001
Download: ML23088A206 (1)
v • d • e


Text

{{#Wiki_filter:I March 27, 2023 Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555-0001 Duane Arnold Energy Center Docket No. 50-331 Renewed Facility Operating License No DPR-49 Duane Arnold Energy Center Independent Spent Fuel Storage Installation NRC Docket No. 72-030 NEXTeraM ENERGY~ NG-23-0001 10 CFR 50.75(f)(1) 10 CFR 50.82(a)(8)(v)

Subject:

Duane Arnold Energy Center, 2023 Annual Decommissioning and Spent Fuel Management Funding Status Report

References:

1) Letter, Curtland (NEDA) to U.S. NRC, "Certification of Permanent Cessation of Power Operations," NG-20-0074, dated August 27, 2020 (ML20240A067)
2) Letter, Curtland (NEDA) to U.S. NRC, "Certification of Permanent Removal of Fuel from the Reactor Vessel for Duane Arnold Energy Center," NG-20-0090, dated October 12, 2020 (ML20286A317)
3) Letter, Curtland (NEDA) to U.S. NRC, "Post Shutdown Decommissioning Activities Report," NG-20-0027, dated April 2, 2020 (ML20094F603)
4) Letter, Hansen (NEDA) to U.S. NRC, "Update to Spent Fuel Management Plan Pursuant to 10 CFR 50.54(bb)," NG-20-0078, dated January 13, 2021 (ML21014A455)
5) Letter, Wall (NRC) to D. Moul (NEDA), "Duane Arnold Energy Center - Request for Exemption from 10 CFR 50.82(a)(8)(i)(A) and Section 75(h)(1)(iv)," dated August 12, 2020 (ML20171A627, ML20171A626)

In accordance with 10 CFR, 50. 75(f)(1 ), 10 CFR 50.82(a)(8)(v), and 10 CFR 50.82(a)(8)(vii), NextEra Energy Duane Arnold, LLC (NEDA) submits the annual status of decommissioning funding, status of funding for managing irradiated fuel, and the financial assurance status report for the Duane Arnold Energy Center (DAEC). In References 1 and 2, DAEC certified permanent cessation of power operation and permanent removal of fuel from the reactor vessel for DAEC. In Reference 3, DAEC submitted its Post-Shutdown Decommissioning Activities Report (PSDAR) containing a site-specific Decommissioning Cost Estimate (DCE) pursuant to 1 O CFR 50.82(a)(4)(i) and 1 O CFR 50.82(a)(8)(iii). In Reference 4, NEDA submitted a spent fuel management plan pursuant to 10 CFR 50.54(bb). In Reference 5, the NRC granted an exemption allowing NEDA to fund spent fuel management and site restoration costs from its Nuclear Decommissioning Trust.

i/AJ S0 l NextEra Energy Duane Arnold, LLC, 3277 DAEC Road, Palo, IA 52324

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NextEra Duane Arnold, LLC I Duane Arnold Energy Center NG-23-0001 Page 2 of 2 provides the 2023 Annual Decommissioning and Spent Fuel Management Funding Status Report. No commitments to the NRC are made in this letter. If you should have any questions about the enclosed reports, please contact Tracy Weaver at (319) 851-7250. Respectfully, Jc~ Decommissioning Director, Duane Arnold Energy Center NextEra Energy Duane Arnold, LLC

Enclosure:

As stated cc: Regional Administrator, USNRC, Region Ill Project Manager, USNRC, Duane Arnold Energy Center Inspector, USNRC, Duane Arnold Energy Center State of Iowa Duane Arnold Energy Center 2023 Annual Decommissioning and Spent Fuel Management }funding Status Report As required by 10 CPR 50.75(f)(l) and 10 CFR 50.82(a)(8), Duane Arnold Energy Center (DAEC) reports the following information: A. Current Decommissioning Cost Estimate (License 'fermination, Spent Fuel Management, and Site Restoration) As required by 10 CFR 50.82, DAEC completed a site-specific Decommissioning Cost Estimate (DCE), prepared by Energy Solutions LLC. The study was performed using the SAFSTOR decommissioning method. The DCE included expenses anticipated to be incurred for license tennination activities (radiological remediation), interim spent fuel storage, and non-radiological site restoration activities. Based on the DCE (completed with 2018 data, revised January 2020), the total estimated cost to decommission DAEC is $1,191,607,211 (for period of2019-2080, escalated to 2022 dollars). Of that total cost estimate, the current site-specific cost estimate for license tem1ination expenses of Duane Arnold Energy Center is $844,755,544. The current estimate of spent fuel management costs is $302,454,559. The current estimate for non-radiological site restoration is $42,485,151. The current estimate oflndependent Spent Fuel Storage Installation (ISFSI) demolition and decommissioning (D&D) costs is $1,911,956. H. Funding Balance for I,iccnsc Termination Because DAEC is jointly owned among NextEra Energy Duane Arnold, LLC (NEDA), Central IO\\va Power Cooperative (CIPCO), and Com Belt Power Cooperative (Com Belt), each Joint Owner (NEDA, CIPCO, and Corn Belt) maintains nuclear decommissioning trust(s) respective to their undivided interest ownership share. The total balance available in NRC-jurisdictional nuclear decommissioning trusts (NDTs) for DAEC as of December 31, 2022 was $520,501,644, broken out as follows Licensee Trust Balance as of 12/31/22 ($Thousands) Duane Arnold - NextEra 409,492 Duane Arnold - CJPCO 74,203 Duane Arno1d - Corn Belt 36,807 C. Funding Balance for Spent Fuel Management In accordance with the exemption granted by the NRC on August 12, 2020 (Reference 5), withdrawals from NEDA's NDT are used for decommissioning, spent fuel management and non-radiological site restoration purposes. CIPCO and Com Belt did not seek an exemption to allow use of their ND Ts for spent fuel management activities. CIPCO and Corn Belt are not-for-profit electric cooperatives. CIPCO and Com Belt maintain internal supplemental reserve funds, Duane Arnold Energy Center 2023 Annual Decommissioning and Spent Fuel Management Funding Status Report outside of their NDTs, the use of which are not legally restricted like an NDT, for asset retirement and other purposes. These funds are sufficient to pay for spent fuel management and may be supplemented by operational income, if necessary. The CIPCO and Corn Belt supplemental funds are not commingled with the NDTs used for license termination costs, and these funds are not included as funds for satisfying NRC minimum license termination obligations. D. Annual Decommissioning Collections None. E. Rates Used to Escalate Decommissioning Costs and Fund Balances The estimates in the 2018 DCE have been inflated to 2022 dollars in the estimates provided in Attachments B - C. The Bureau of Labor Statistics (BLS) data provided the basis for the decommissioning cost estimate inflation rate forecast. Decommissioning costs are inflated using average observed data for Consumer Price Index, for All-Urban Consumers. DAEC used a factor of 1.8% to escalate 2018 dollars to 2019 dollars,1.2% to escalate 2019 dollars to 2020 dollars, 4.7% to escalate 2020 dollars to 2021 dollars, and 8.0% to escalate 2021 dollars to 2022 dollars. Anticipated NEDA, CIPCO, and Corn Belt NDT and supplemental fund balances incorporate a 2% annual real rate of return, consistent with the requirements of 10 CFR 50.75. F. Current ISFSI Decommissioning Cost The current detailed site-specific ISFSI decommissioning cost estimate is $1,911,956 (for period of2019-2080, escalated to 2022 dollars). The table below summarizes data presented in Attachments C-1, C-2 and, C-3 and demonstrates that adequate funding will remain following the decommissioning of the site to cover future ISFSI D&D costs (10 CFR 72.30). Projected Trust Fund ISFSI Decommissioning Trust Balance as of 12/31/22 Balance After Licensee (2022$ Thousands) Decommissioning Cost Estimate (2022$ Thousands) (2022$ Thousands) Duane Arnold - NextEra 409,492 247,218 1,338 Duane Arnold - CIPCO 74,203 48,216 382 Duane Arnold - Corn Belt 36,807 23,460 191 Duane Arnold Energy Center

  • 2023 Annual Decommissioning and Spent Fuel Management Funding Status Report G. Contracts to Fund Decommissioning None.

H. Modification to Method of Providing Financial Assurance None. I. Material Changes to Trust Agreements None. J. Annual Report Conclusions Attachment A provides the amount spent on decommissioning, both cumulative and over the previous calendar year, the remaining balance of any decommissioning funds, an estimate of the costs to complete decommissioning work performed during the year, reflecting any difference between actual and estimated costs, in satisfaction of 10 CFR 50.82(a)(8)(v). Attachment A also provides the projected costs of managing spent fuel and the amount of funds accumulated to cover the cost of irradiated fuel, in satisfaction of 10 CFR 50.82(a)(8)(vii). Attachment B provides the projected annual costs to decommission DAEC escalated to 2022 dollars. Attachment C-1 compares the NEDA NDT balance, accounting for a 2% real rate of return, against the estimated costs for license termination, spent fuel management, and site restoration costs, demonstrating the NEDA NDT contains sufficient funds to cover license termination (50.82(a)(8)(v)) and spent fuel management (50.82(a)(8)(vii)) costs. Attachment C-2 compares the CIPCO NDT balance, escalated at a 2% real rate of return., against the estimated costs for license termination, demonstrating the CIPCO NDT contains sufficient funds to cover license termination costs (50.82(a)(8)(v)). Attachment C-3 compares the Com Belt NDT balance, escalated at a 2% real rate of return, against the estimated costs for license termination, demonstrating the Com Belt NDT contains sufficient funds to cover license termination costs (50.82(a)(8)(v)). Thus, considering the current NDT balances, anticipated growth in those balances over time, and anticipated future license termination costs, the Joint Owners' trust funds are expected to have adequate funds for completion of license termination activities. Similarly, considering the NEDA NDT balance and the CIPCO and Com Belt supplemental funds and other sources, the Joint Owners are expected to have adequate funds for spent fuel management activities. Duane Arnold Energy Center 2023 Annual Decommissioning and Spent Fuel Management Funding Status Report Decommissioning Funding Status Report Duane Arnold Energy Center ATTACHMENT A Summary Information as of December 31, 2022 10 CFR 50.82 (a) (8) (v)-(vii) 2022 NEDA Decommissionina Trust 409491602 2022 CPCO Decommisslonlna Trust 74,203 035 2022 Corn Bell Oecomm!ssionina Trust 36,807007 2022 13,676,700 23,716,869 174,212 $ 37,567782 Total 50.673 669 $ 91400055 $ 1110,728 143184A62 Prtnr.Vear.Exoenclifures W*rlaiice'to Estimated CostK0.1121*118\\ivi Bl~*:tr**~:;,.* '*. '.

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Comments, 2022Estimated 18,591,339 67,080,541 85,671,879 2022Actua!

13,676,700 23,716,869 $ 174 212 $ 37,567,782 Variance 4,914,638 $ 43,363.671 1174.212) $ 48,104,1)98 Variance Commentary License Tennlnatlon: Favorable (lower, expenses compared to DCE esll mate driven by cost optiml:zallon and accelerated project llmelne Spent Fuel: Fa\\lOrable (Lower) expenses compared to DCE estimate driven by final pool to pad spent fuel completed earlier than expected in the DCE study Sita Restoration: Immaterial unfa110rable (higher) expenses compared to DCE estimate driven by accelerated demolition $3.9 MM Accruals are reflected in total costs but not in reimbursements See below for variance commentarv tCumiii.;t;;.,.,,*w111,ifrawalsfroin Decommissloriina Trliitst50'82fa'll811\\l'IIA1*~,,:,.~; i,,,,~0>*;-,\\'/*,~ ~ *.. '*:fi : *f.*:*;,'..*:,*,c,~::..{7::.:)\\::,,i;.'1,~ *:' ',:,,,.t:~*,**.,'* "* ': "\\;'..'*11:,, ':\\.,:,.j\\_.,. *.". *:. *,::<:;.*:,":,:. '.*l :.,.:.:., *>!';;>:"'." '. :: "!

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Throuah 12131/2022 NEDA 32,204,STT $ 63,351,685 $ 775,215 $ 96,331,n? Throuah 12131/2022 CIPCO 10,057927 10,057,927 Throuah 12/31/2022 Com Belt 5,119,734 5,119,734 Tota1Throuah2022 47,382,538 63,351,685 $ 775,215 111,509,438 iRenialnlnri,hecommlsslorilno~EiltimatedCost50.82fallRYii\\iBl:/ll/iil/Bl-,;* :'"'.:7 ::*. ***:; '< ' *,;*~>~:~\\,,:~:

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728,229 208957 42.AR.,; 1,912 981,583 Remaininadecomcostsfrom2023-2080escalatedto2022$ Duane Arnold Energy Center 2023 Annual Decommissioning and Spent Fuel Management Funding Status Report Year 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 Total ATTACHMENTS Duane Arnold Energy Center Decommissioning Cost Estimate (100%Share) Estimates in 2022 Dollars (Thousands) License Spent Fuel S~e ISFSI D&D Total2022S Terrrination Restoration 5.956 59345 65,302 17,363 3 756 21,119 6 533 3 769 10,302 2565 3.769 6 334 2130 3 769 5,899 2130 3 769 5.899 2130 3 769 5 899 2196 3 769 5 965 2.063 3 769 5 832 2.063 4 084 6147 2,063 4 088 6 151 2.063 4 088 6 151 2 063 4.088 6 151 2 063 4.088 6 151 2063 4 088 6 151 2063 4 088 6 151 2063 4 088 6 151 2.811 4 088 6.899 2,063 4 088

6. 151 2 063 4 088 6 151 2,063 4 088 6 151 2063 4 088 6 151 2063 4 088 6,151 2 063 4 088 6151 2 063 4 088 6,151 2 063 4 088 6.151 2,063 4 088 6.151 2,063 4 088 6,151 2 063 4.088 6 151 2 063 4.088 6 151 2063 4 088 6 151 2 395 4 088 6483 2 478 4088 6 567 2 063 4 088 6,151 2.063 4 088 6.151 2 063 4,088 6 151 2 517 3 391 5,909 3 587 3,587 3070 3 070 3 070 3 070 3 070 3070 3.070 3,070 3,070 3070 3 070 3 070 3,070 3 070 3070 3070 3 070 3070 3.070 3,070 3,070 3 070 3,070 3 070 17.998 17.998 38.010 38.010 91.152 215 91 367 109,575 469 110,045 137 969 30 354

~38 352 117795 5.680 7241 852 131 568 66 893 32.421 23 99 336 5 628 2 823 8 451 728;229 208,957 42,485 1,912 981,583 Duane Arnold Energy Center 2023 Annual Decommissioning and Spent Fuel Management Funding Status Report Year 2023(!) 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2059 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2023

  • 2080 Total ATTACHMENT C-1 NextEra Energy Duane Arnold, LLC (70% Share)

License Tennlnallon (50.82(a)(8)(v)) Spent Fuel (50.82(a)(B)(vii)J Estimates in 2022 Dolfars (Thousands) 1 Balance with 2% Rate of Return NEDA Ownership I Balance Annual Fund Eamlngs I.Jcense Sport l'uel Termination 4,170 41.., 12,154 2.629 4,573 2,638 1,796 2,638 1491 2,638 1491 2.638 1,491 2,638 1,537 2,638 1,444 2.638 1,444 2.859 1,444 2.862 1,444 2.862 1,444 2.862 1,444 2.862 1,444 2.!362 1.444 2.852 1444 2,!362 1,!l68 2,852 1,444 2.882 1,444 2.862 1,444 2.862 1,444 2.862 1,444 2.862 1,444 2.862 1444 2.852 1,444 2.862 1,444 2.!362 1,444 2.852 1,444 2.!362 1,444 2,882 1,4H 2,852 1,677 2,882 1,735 2,852 1,444 2,862 1,444 2.862 1,444 2.852 1,762 2.374 2,511 2149 2,149 2149 2,149 2,149 2,149 2.149 2,149 2.149 2,149 2,149 2,149 12.599 26,607 63 807 75,703 00,578 21 82.456 3,976 46,825 3,940 509,760 146 270 70% 2.0% Site Re&toratlon 5,059 22.694 1,976 29,740 409,492 Nn1Era70%Share of Costs E:llrrlblafrolll DecamTrust A ISFSI CID Total Beginning of Year 45711 409492 14,783 358,073 7,211 380,651 4,434 360,653 4,129 383,433 4,129 386,572 4,129 369,775 4.176 373,041 4.082 376.329 4.SOS 379,771 4.306 383,063 4.306 388,418 4.306 389,841 4,306 393,332 4,306 386,693 4,306 400,525 4.306 404,;.30 4,828 408,008 4.306 411,339 4,306 415 260 4.306 419,260 4,306 423,339 4.a(ll 427.500 4.306 431,744 4.306 436 073 4,306 440489 4,306 444 993 4300 449,597 4,306 454.273 4306 459,053 4.306 463,928 4.638 486,901 4.597 473,740 4,306 478,619 4.306 483,885 4.306 489,257 4,138 <49-173EI 2,511 500,495 2.1-48 507994 2,148 516005 2148 524,178 2,149 532,510 2,148 541,012 2.149 549,683 2.149 558,528 2.149 567,549 2.149 576,751 2,148 588,137 2,148 595,711 2.148 605476 12.599 61$437 '88(17 616,147 150 83,957 600,843 329 77,031 548,902 247 00,846 482,849 596 92.097 395,880 16 69~ 311,476 5,816 248,170 1,338 687,108 B C

  • A+B C Annual NOT EndolV-NDT Withdrawals Earnings llalanc:e (49,6081 8.180 368.073 (14,783) 7,361 360,651 (7.211) 7,213 360,653 (4,434 7,213 363,433

("-129) 7.21l9 3flll572 (4.129 7,331 388.Tlfi (4,129 7,395 373,041 (4.176 7,461 376326 14.- 7,571 3711.771 (4.= 7,595 383,1)63 14.- 7,661 388,418 (4,306) 1128 389,841 (4.306) 7,787 393.332 (4,300) 1.867 395,893 14.306) 7$31) 400,525 (4,308) &,010 ,41)4,230 (4.306) 8085 408,008 (4,829 8,160 411,339

    • ~M 8,221 415,280 8,305 419.260 14.-

8,31)5 423,339 ~ 8,467 427.500 8,550 431,744 8,635 436.073 (4,306) 8.721 440,489 (4,300) 4,810 444,993 14,306) a.aoo 449,587 14.3061 8992 454,273 (d."""' 9,086 .... 053 (4,306 9,181 463,928 14,.... 9,279 "61l.901 14538 9,378 473.740 i 9,475 478.619 9,572 483,885 9,678 -257 11.785 494.735 (4.136) 9895 500 495 (2,511) 10,010 507,994 '2,1491 10160 516,005 12.1491 10.320 524,176 12.1491 1Q.484 53'2510 (2,149) 10.650 541,012 12.149 10820 549,883 (2,149) 10,994 558,526 (2.1491 11,171 567,549 (2.1491 11,351 576,751 12,1491 11,835 sae.137 (2.1491 ,1723 595,711 (2,1491 11,914 605,476 (2,1491 12.110 615,437 (12.- 12.309 615,147 "86071 12.303 600,843 183,957) 12.017 548 902 (77,031) 10,978 482.849 (96,AAA'l 9.657 395.660 (92,097) 7,-913 311.475 189.5351 6,230 248,170 ($,9161 4,983 247,218 1 2023 NDT withdrawal includes $3,897 of expenses that were not reimbursed during prior periods Duane Arnold Energy Center 2023 Annual Decommissioning and Spent Fuel Management Funding Status Report Year 2023121 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 I 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2023 - 2080 Total ATTACHMENT C-2 CIPCO (20% Share} License Termination (60.82(a)(8)(v)) Estimates in 2022 Dollars (Thousands}/ Balance with 2%Raal Rate of Return CIPCO Ownership/ Balance 20% 74,203 Annual Fund Earnings 2.0% CIPCO 20% Share of Costs Eligible from Decom Trust A B C Uc:ense ISFSI D&D Total Beginning of Year Annual NOT Termination Balanea Withdrawals Eemlngs 1,191 1,191 74,203 (1,268' 1,484 3,473 3,473 74,419 (3,473 1,488 1,307 1,307 72,435 (1,307) 1,449 513 513 72,577 (513) 1,452 426 428 73,515 (426) 1,470 426 428 74,560 (426 1,491 426 426 75,625 (426) 1,512 439 439 76,711 (439) 1,534 413 413 77,606 (413) 1,556 413 413 78,950 (413) 1,579 413 413 80,118 ~ 1,602 413 413 81,306 1,626 413 413 62,519 1,650 413 413 83,757 (413) 1,675 413 413 85,020 (413) 1,700 413 413 86,308 (413' 1,726 413 413 87,621 (413) 1,752 562 562 88,961 (562) 1,779 413 413 90,176 (413) 1,804 413 413 91,569 (413) 1,831 413 413 92,988 (413) 1,860 413 413 94,435 (413 1,889 413 413 95,911 (413) 1,918 413 413 97,417 (413) 1,948 413 413 98,952 (413) 1,979 413 413 100,519 (413) 2,010 413 413 102,116 (413) 2,042 413 413 103,746 (413) 2,075 413 413 105,409 (413) 2,108 413 413 107,104 (413) 2,142 413 413 108,834 (413) 2,177 479 479 110,598 (479 2,212 496 496 112,330 (496) 2,247 413 413 114,061 (413) 2,282 413 413 115,950 (413) 2,319 413 413 117,857 (413) 2,357 503 503 119,801 (503) 2,396 717 717 121,694 (717) 2,434 614 614 123,410 (614 2,468 614 614 125,265 (614) 2,505 614 614 127,156 (614) 2,543 614 614 129,085 (614) 2,1182 614 614 131,053 (614) 2,821 614 614 133,060 (614) 2,661 614 614 135,107 (614) 2,702 614 614 137,195 (614) 2,744 614 614 139,325 (614 2,786 614 814 141,4118 (614) 2,830 614 614 143,713 (614) 2,874 614 614 145,974 (614 2,919 3,000 3,600 148,279 (3,000) 2,966 7,002 7,602 147,645 (7,602) 2,953 18,230 43 18,273 142,996 (18,273) 2,660 21,915 94 22,009 127,563 (22,009) 2,552 27,594 71 27,664 108,125 (27,864) 2,163 23,559 170 23,729 82,623 (23,729) 1,652 13,379 5 13,383 00,646 (13,383) 1,211 1,126 1,126 48,374 (1,126) 967 146,646 382 146,028

  • A+B+C End of Year NDT Balance 74,419 72,435 72,577 73,515 74,560 75,625 76,711 77,806 78,950 60,116 81,306 82,519 83,757 85,020 86,308 87,621 88,981 90,178 91,569 92,988 94,435 95,911 97,417 96,952 100,519 102,116 103,746 105,409 107,104 108,834 110,598 112,330 114,081 115,950 117,657 H9,601 121,894 123,410 125,265 127,1156 129,085 131,053 133,0BO 135,107 137,195 139,325 141,498 143,713 146,974 148,279 147,645 142,996 127,5\\!3 108,125 82,623 60,548 48,374 48,218 2 2023 NDT withdrawal includes $77 of expenses that were not reimbursed during prior periods Duane Arnold Energy Center 2023 Annual Decommissioning and Spent Fuel Management Funding Status Report ATTACHMENT C-3 Corn Belt (10% Share)

License Termination (50.82(a)(B)(v)) Estimates in 2022 Dollars (Thousands)/ Balance with 2% Real Rate of Return CB Ownership/ Balance Annual Fund Earnings 10% 20% 36,807 Corn Belt 10% Share of Costs Eligible from Decom Trust A B Year License ISFSI D&D Total Beginning of Year Termination Withdrawals Balance 2023(3) 596 596 36,807 (543) 2024 1,736 1,736 37,000 (1,736) 2025 653 653 36,004 (653) 2026 257 257 36,070 (257) 2027 213 213 36,535 (213) 2028 213 213 37,053 (213) 2029 213 213 37,581 (213) 2030 220 220 38,120 (220) 2031 206 206 38,662 (206) 2032 206 206 39,229 (206) 2033 206 206 39,808 (206) 2034 206 206 40,397 (206) 2035 206 206 40,999 (206) 2036 206 206 41,613 (206) 2037 206 206 42,239 (206) 2038 206 206 42,877 (206) 2039 206 206 43,528 (206) 2040 281 281 44,193 (281) 2041 206 206 44,795 (206) 2042 206 206 45,485 (206) 2043 206 206 46,188 (206) 2044 206 206 46,906 (206) 2045 206 206 47,638 (206) 2046 206 206 48,384 (206) 2047 206 206 49,146 (206) 2048 206 206 49,922 (206) 2049 206 206 50,714 (206) 2050 206 206 51,522 (206) 2051 206 206 52,346 (206) 2052 206 206 53,187 (206) 2053 206 206 54,044 (206) 2054 240 240 54,919 (240) 2055 248 248 55,778 (248) 2056 206 206 56,646 (206) 2057 206 206 57,572 (206) 2058 206 206 58,517 (206) 2059 252 252 59,481 (252) 2060 359 359 60.419 (359) 2061 307 307 61,269 (307) 2062 307 307 62,187 (307) 2063 307 307 63,124 (307) 2064 307 307 64,080 (307) 2065 307 307 65,054 (307) 2066 307 307 66,048 (307) 2067 307 307 67,062 (307) 2068 307 307 68,097 (307) 2069 307 307 69,151 (307) 2070 307 307 70,227 (307) 2071 307 307 71,325 (307) 2072 307 307 72,445 (307) 2073 1,800 1,800 73,586 (1.800) 2074 3,801 3,801 73,258 (3,801) 2075 9,115 21 9,137 70,923 (9,137) 2076 10,958 47 11,004 63,204 (11,004) 2077 13,797 35 13,832 53,464 (13,832) 2078 11,779 85 11,865 40,701 (11,865) 2079 6,689 2 6,692 29,650 (6,692) 2080 563 563 23,552 (563) 2023 - 2080 Total 72,823 191 73,014 3 2023 NDT withdrawal is overdrawn by $52 C Annual NDT Earnings 736 740 720 721 731 741 752 762 773 785 796 808 820 832 845 858 871 884 896 910 924 938 953 968 983 998 1,014 1,030 1,047 1,064 1,081 1,098 1,116 1,133 1,151 1,170 1,190 1,208 1,225 1,244 1,262 1,282 1,301 1,321 1,341 1,362 1,383 1,405 1,427 1,449 1,472 1,465 1,418 1,264 1,069 814 593 471 =A+B+C End of Year NDT Balance 37,000 36,004 36,070 36,535 37,053 37,581 38,120 38,662 39,229 39,808 40,397 40,999 41,613 42,239 42,877 43,528 44,193 44,795 45,485 46,188 46,906 47,638 48,384 49,146 49,922 50,714 51,522 52,346 53,187 54,044 54,919 55,778 56,646 57,572 58,517 59,481 60,419 61,269 62,187 63,124 64,080 65,054 66,048 67,062 68,097 69,151 70,227 71,325 72,445 73,586 73,258 70,923 63,204 53,464 40,701 29,650 23,552 23,460 Duane Arnold Energy Center 2023 Annual Decommissioning and Spent Fuel Management Funding Status Report ATTACHMENT D Duane Arnold Energy Center 2022 Decommissioning Cost Actual Expenses (100% Share) (dollars in thousands) ,,,C ,,',L' ,;,,,, Decbmmissioriin~*Expense ',';,,' """ ; 0-,; L T1 Safstor Plannina Total L T2 Transition Following Shutdown Total Pavroll, Compensation & Labor Ohs Contractors & Professional Services Insurance Taxes Other Than Income Taxes Other LT3 SAFSTOR Preparation Delay During Spent Fuel Pool Operations Total Payroll, Compensation & Labor Ohs Contractors & Professional Services Licenses, Permits & Fees Other Ooeratina i=vnenses (Utilities, etc.) Material & Suoolies Taxes Other Than Income Taxes Other LT4 Completion of SAFSTOR Preparations Total Pavroll, Comoensation & Labor Ohs Contractors & Professional Services Other Ooeratina FYnenses (Utilities, etc.) Licenses, Permits & Fees Insurance Material & Suoolies Taxes Other Than Income Taxes Other LT5 Dormancy With Orv Storage Total Pavro!l, Comoensation & Labor Ohs Contractors & Professional Services Licenses, Permits & Fees Other Ooeratina 1-vnenses (Utilities, etc.) Taxes Other Than Income Taxes Other LiCeOSe Tt?rrriiriation TOfal "., ~,h Soent Fuel Planning (SF1) Total Spent Fuel Cooling During Zirc Fire Window (SF2} Pavroll, Compensation & Labor Ohs Contractors & Professional Services Insurance Other Spent Fuel Transfer to Dry Storage (SF3) Pavroll, Compensation & Labor Ohs Contractors & Professional Services Licenses, Permits & Fees Other Ooeratina t:xoenses (Utilities, etc.) Insurance Material & Suoolies Other Orv Storaae Durina Comoletion of SAFSTOR Preoarations (SF4l Pavroll, Comoensation & Labor Ohs Contractors & Professional Services Licenses, Permits & Fees Insurance Other Orv Storaoe Durino Dormancv (L TS) Pavroll, Comoensation & Labor Ohs Contractors & Professional Services Licenses Permits & Fees Other ,,,,2022 Actuals"'* 5 1675 (526 (68 (68 (41 27 8,064 6,533 357 549 331 116 83 95 5,346 3,380 521 562 410 169 126 107 71 938 552 33 129 106 64 54 1, '.':,;;,,'f 3;577, (36) 45 (17) (66) 2 20,392 8,884 10,347 692 176 145 108 41 2,768 1,791 454 260 212 51 593 341 32 161 58 ,,-,,*'nt'Filel'Tofat:,, '.' << ': f {J:. ~.:',, _,,,, "}',,ft.. ~1t ~"'*~;~:~ r:.~,,. l'f' ').;,1,;~~v'\\~* ;;,* I"',/' '\\"" t'\\\\.'...,!, *,w,, \\; ,_.,,,,,,**23'*717, GF1 Clean Bulldlna Demolition During Decommissioning 174 Pavroll, Comoensalion & Labor Ohs 18 Contractors & Professional Services 102 Material & Su001ies 40 Other 14 Greenfield Toial', }~;;~_-*'.i ;; _,?,, ",,,i<..,.,,w,¥*rn .*-:,"J;:'."'I.":.'.iYi'M'"'~-~~ 1*;1r.. :i...,:::ti, 1_,,~::)J.(_ ,,, ;,;, :::+lk~:,f",.f* ':i'i:,:~~\\174 1 .Total oecomiri1ss10n1na,'Excerise,i,:),,i,t::,"...,;*, ;,. ""':,,,,,*o,.:._;,' '::',,: r' ~~ '*',;*, :;*;':,,, ::.!37,668:}}

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