NG-25-0003, 2025 Annual Decommissioning and Spent Fuel Management Funding Status Report and Independent Spent Fuel Storage Installation (ISFSI) Decommissioning Financial Assurance Update
| ML25084A051 | |
| Person / Time | |
|---|---|
| Site: | Duane Arnold, Maine Yankee  |
| Issue date: | 03/17/2025 |
| From: | Both J NextEra Energy Duane Arnold |
| To: | Document Control Desk, Office of Nuclear Material Safety and Safeguards, Office of Nuclear Reactor Regulation |
| References | |
| NG-25-0003 | |
| Download: ML25084A051 (1) | |
Text
NEXTeraM ENERGY~
March 17, 2025 NG-25-0003 10 CFR 50.75(f)(1) 10 CFR 50.82(a)(8)(v) 10 CFR 72.30(c)
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
Subject:
Duane Arnold Energy Center, 2025 Annual Decommissioning and Spent Fuel Management Funding Status Report and Independent Spent Fuel Storage Installation (ISFSI) Decommissioning Financial Assurance Update
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 (M L20286A317)
- 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), 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 accordance with 10 CFR 72.30(c), NEDA submits the ISFSI Decommissioning Financial Assurance Update for the DAEC. NEDA, Central Iowa Power Cooperative, and Corn Belt Power t-1, (} b l Cooperative own the Duane Arnold Energy Center. The update provides the ISFSI financial assurance for all three owners.
AoD j f\\)fY15S?b NextEra Energy Duane Arnold, LLC, 3277 DAEC Road, Palo, IA 52324 N
N1Y1SS
NextEra Duane Arnold, LLC I Duane Arnold Energy Center NG-25-0003 Page 2 of 2 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 10 CFR 50.82(a)(4)(i) and 10 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. provides the 2025 Annual Decommissioning and Spent Fuel Management Funding Status Report. Enclosure 2 provides the ISFSI Decommissioning Financial Assurance Update.
This letter contains no new commitments and makes no revisions to existing commitments.
If you should have any questions about the enclosed reports, please contact Tracy Weaver at (319) 851 -7250.
Respectfully, Justir
- &k Decommissioning Director, Duane Arnold Energy Center NextEra Energy Duane Arnold, LLC
Enclosures:
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 2025 Annual Decommissioning and Spent Fuel Management Funding Status Report As required by 10 CFR 50.75(£)(1) and 10 CFR 50.82(a)(8), Duane Arnold Energy Center (DAEC) reports the following information:
A. Current Decommissioning Cost Estimate (License Termination, 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 termination activities (radiological remediation), interim spent fuel storage, and non-radiological site restoration activities. Based on an update to this DCE
( completed with 2023 data), the total estimated cost to decommission DAEC is
$1,027,687,330 (for period of 2025-2080, escalated to 2024 dollars). Of that total cost estimate, the current site-specific cost estimate for license termination expenses of Duane Arnold Energy Center is $743,986,441. The current estimate of spent fuel management costs is $241,619,759. The current estimate for non-radiological site restoration is
$39,781,041. The current estimate ofindependent Spent Fuel Storage Installation (ISFSI) demolition and decommissioning (D&D) costs is $2,300,089.
B. Funding Balance for License Termination Because DAEC is jointly owned among NextEra Energy Duane Arnold, LLC (NEDA),
Central Iowa Power Cooperative (CIPCO), and Corn Belt Power Cooperative (Corn 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 31,2024 was $694,030,656, broken out as follows.
Licensee Trust Balance as of 12/31/24
($Thousands)
Duane Arnold - NextEra 559,641 Duane Arnold - CIPCO 89,106 Duane Arnold - Corn Belt 45,283 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 Corn Belt did not seek an exemption to allow use of their NDTs for spent fuel management activities. CIPCO and Corn Belt are not-for-profit electric cooperatives. CIPCO and Corn Belt maintain internal supplemental reserve funds, Duane Arnold Energy Center 2025 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 2023 DCE have been inflated to 2024 dollars in the estimates provided in Attachments B - C.
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. Contracts to Fund Decommissioning None.
G. Modification to Method of Providing Financial Assurance None.
H. Material Changes to Trust Agreements None.
I. 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 in 2024 dollars.
Duane Arnold Energy Center 2025 Annual Decommissioning and Spent Fuel Management Funding Status Report Attachment C-1 compares the NEDA NDT balance, accounting for a 2% real rate of retmn, against the estimated costs for license termination, spent fuel management, and site restoration costs, demonstrating the NEDA NDT contains sufficient funds to cover license te1mination (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 ofreturn, 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 2025 Annual Decommissioning and Spent Fuel Management Funding Status Report Decommissioni Trust Fund Balances 50.7 Year 2024 2024 2024 Other Financial Assurance Methods Being Relied Upon 50.75{fl(1l one Prior Yeacs Decommissioni Year 2019-2023 2024 2,939,300 Total 57.021.028 Prior Year ExDenditures Variance to Estimated Cost 50 B2falf8lM(Bl Year I
License Termination 2024 Estimated I $
2024 Actual I $
2939 300 Variance (2,939,300)
Variance Commenta!Y s
s Decommissioning Funding St.'.ltus Report Dmme Arnold Energy Center ATTACHMENT A Summary Information as of December 31, 2024 10 CFR 50.82 (a) (8) (v)-(vii) ntFuel Site Restoration ISfSI D&O 97 167 126 1.084 994 5 206.781 s 102,373.909 1.084.994 SDentFuel Site Restoration ISfSI O&D 3,940,053 6,125,499 5 206.781 s 11,266.728) $
6.125.499 License Termination: Favorable (lower) expenses compared to DCE estimate driven by coot op "mizafion Spent Fuel: Favorable (lower) expem~es compared to DCE es *male driven by cos optimization.
Cumulative Withdrawals from Oecommissioninn Trust~ 50.82faUBUv 'Al Year Joint Owner f License Termination Spent fuel Through 12/31/2024 INEDA 37,624,702 s 70,683.706 Through 12/31(2024 CIPCO 1 $
11,314,526 s Through 12/31(2024 Com Bell 5485 622 s Total Through 2024 54,424,851 s 70,883,706 Remainino Oecommissionino Estimated Cost 50.821all811vlfBl JfviilfBt Year I
License Termination SDent Fuel 2024.S 743986.441 s 241619759 Decommtss1001ng Cri1ena Upon Wh1<:h the Estimate 1s Based 50.75{Q11150.821aH8IMCBI SAFSTOR Anv Modifica1ion to Method of Providing f inancial Assurance 50.75(fl{1I 50.82(al(81MICI 0
s s s s s
Anv Material Changes to Trust Agreement Since Previous Report 50.75111(1 50.82(a)(81MID}
Site Restoration ISfSI O&O 759,497 759.497 Site Restoration ISfSI D&O 39 761 041 2,300,089 Fund Balance Comments S
559 641 496 S
89105 715 S
45,263,445 Total Comments s
15 333 850 s
8 146 081 s
160,479,930 Tot.ii Comments s
10,065,552 s
8 146,081 1 919 471 See below for variance commentruv Total Comments 109,267,905 11,314,526 5,485.622 s
126,068.053 Total Comments s
1,027 687 330 Rem:li nina decom costs from 2025 - 2080 in 2024 $
In accordance with !he exemption granted by NRG on August 12, 2020, withdrawals from NEOA's nuclear decornmi$$ioning trust (NOT) for spent fuel management purposes; request for Exemption from 10 CFR 50.82(a)(6)0)(A) and Section 75(h)(1)rrv),' da ed August 12, 2020 (ML20171A627, ML.20171A626)
Heed for Additional Financial Assurance 50.75(f)(1150.B2(a}(8)(vi) (vii)(C)
See Attachment C Duane Arnold Energy Center 2025 Annual Decommissioning and Spent Fuel Management Funding Status Report ATTACHMENT B Duane Arnoldi Energ'.( Center Decommis!>ioning Cost Estimate (100~ Share)
Estimaas in 2024 Dollars (Thou!>ands)
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9 50~
0 ~f'"'T
.,_1 I
9-500 g 5oe, 9 soe 9 506 9 50E, 9505 9 503 94:::D 9 420 9 4::0 1:14:::0 H::O 94::0
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- 24 253 1 - 33 15$ 1,0 1.3 OS3 1 60~
2.300 1.027.687 Duane Arnold Energy Center 2025 Annual Decommissioning and Spent Fuel Management Funding Status Report Ye ;or 2025°'
2020 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2038 2040 2041 2042 2043 2044 204f 2046 2047 2048 2049 20~
2051 2052 2053 2054 20~
2056 2057 20!i8 2059_
20CO 2061 2062 2063 2004 2065 2086 2067 2068 2000 2070 2071 2072 2073 2074 2075 2076 2077 2078 207P 2oeo 2025 - 2080 Total ATTACHMENT C-1 N*xtEra Energy Duane Arnold, LLC (70% Sh.are)
License Tennirution {50.82(*)(8)(v)}
Spent F~ (50.82(a)(8)(vii))
Estimates in 2024 Dollars {Thousands) / Balance with 2% Rate of Return NEDA Ownership I Balan°"
Annual Fund Earnings Lfc:e1'e
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!\\.Jo 1!5 11.265) 12.72' 6,LJ,6,:.2 I
1 2025 NDT withdrawal includes $(3,068) of expenses that were not reimbursed during prior periods.
Duane Arnold Energy Center 2025 Annual Decommissioning and Spent Fuel Management Funding Status Report Y83r 2CQ5*"
- 2D2E, 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2036 2039 2040 2041 2°'2 2043 2044 2045
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. 2054 2055 2058 2057 2058 20'39 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2025
- 2080 Total ATTACHMEITT C-2 ClPCO (20% St:larll)
License Tennlnatloo (5'-0.82,[a](Bl!Vll Eatlmat98 In.2024 Dollm [TilOI.ISanoaJ J Baf'3nc& Wllrl 2".4 Real Rat& or Return OIPOO Oii'lliUlll'llp I Bal3nce Annual fur:xl Earnings Uut:frt6
~crr11i*1i1ficfl s ;:a1r.&u i'Sc 7Sc j'~
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~
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101 23830
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Duane Arnold Energy Center 2025 Annual Decommissioning and Spent Fuel Management Funding Status Report Year 20:.7
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License Terrrination {50.82[a)(B)M)
Estim.ne-s in 2024 Dollars jThousands) I Balanre with 21/4 R~ Rate of Return CB Ownership / Balance Pnnual Fund E.aminA:S 45.283 Co m Bolt 10'!i &haA* of CDC~ Elldlll* trom Ot<>om rruct
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Duane Arnold Energy Center 2025 Annual Decommissioning and Spent Fuel Management Funding Status Report ATTACHMENT DC4l Duane Arnold Energy Center 2024 Decommissioning Cost Actual Expenses (100% Share)
(dollars In thousands)
Decommissioning Expense L T5 Dormancy With Dry Storage Total Payroll, Compensation & Labor Ohs Contractors & Professional Services Emolovee Related Expenses Insurance Licenses, Permits & Fees Material & Supplies Other Operatina Expenses Plant Site & Transportation Expenses Taxes Other Than Income Taxes Technology Expenses License Termination Total Drv Storage During Dormancy (SF5)
Pavroll, Compensotion & Labor Ohs Contractors & Professional Services Employee Related Expenses Insurance Licenses, Permits & Fees Moterial & Supplies Other OperotinCJ Expenses Plant Site & Transportation Expenses Technology Expenses Taxes Other Than Income Toxes Spent Fuel Total Total Decommissioning Expense 2024 Actuals 3,144 1 786 65 10 590 446 27 184 17 (8
27 3144 5,218 3,865 110 5
135 335 29 111
'13 10 605 5,218 8,362 4Attachment D total decommissioning expense excludes immaterial reclass adj ustments for previous completed periods.
Duane Arnold Energy Center 2025 ISFSI Decommissioning Financial Assurance Update 10 CFR 72.30(c)
The detailed site-specific ISFSI decommissioning cost estimate is $2,300,089 (for period of 2025-2080, in 2024 dollars). The following table summarizes Attachments C-1, C-2 and, C-3 which reflects the trust balance as of 12/31/24 and the projected fund balance remaining after decommissioning and the ISFSI decommissioning cost estimate.
Projected Trust Fund ISFSI Decommissioning Trust Balance as of 12/31/24 Balance After Licensee (2024$ Thousands)
Decommissioning Cost Estimate (2024$ Thousands)
(2024$ Thousands)
Duane Arnold -
559,641 647,642 1,610 NextEra Duane Arnold -
89,106 81,560 460 CIPCO Duane Arnold -
45,283 41,506 230 Corn Belt The following table supplements the ISFSI decommissioning funding plan to address new information that may affect the previously submitted reports in accordance with 10 CFR 72.30(c)(l-4).
Spills of radioactive material producing additional residual None radioactivity in onsite subsurface material Facility modifications None Changes in authorized possession limits None Actual remediation costs that exceed previous cost estimate None