RA-23-0036, Biennial Decommissioning Financial Assurance Reports

Biennial Decommissioning Financial Assurance Reports

ML23089A305
Person / Time
Site:	Oconee, Mcguire, Catawba, Harris, Brunswick, Robinson, McGuire
Issue date:	03/30/2023
From:	Ellis K Duke Energy, Duke Energy Carolinas, Duke Energy Progress
To:	Office of Nuclear Reactor Regulation, Document Control Desk
References
RA-23-0036
Download: ML23089A305 (1)

Text

Kevin M. Ellis General Manager Nuclear Regulatory Affairs, Policy & Emergency Preparedness Duke Energy 13225 Hagers Ferry Rd., MG011E Huntersville, NC 28078 843-951-1329 Kevin.Ellis@duke-energy.com

Serial: RA-23-0036 10 CFR 50.75(f)(1)

March 30, 2023 10 CFR 50.4 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555-0001

Brunswick Steam Electric Plant, Units 1 And 2, Docket Nos. 50-325, 50-324 Catawba Nuclear Station, Units 1 And 2, Docket Nos. 50-413, 50-414 Shearon Harris Nuclear Power Plant, Unit 1, Docket No. 50-400 Mcguire Nuclear Station, Units 1 And 2, Docket Nos. 50-369, 50-370 Oconee Nuclear Station, Units 1, 2 And 3, Docket Nos. 50-269, 50-270, 50-287 H.B. Robinson Steam Electric Plant, Unit 2, Docket No. 50-261

SUBJECT:

Biennial Decommissioning Financial Assurance Reports Ladies and Gentlemen:

Pursuant to 10 CFR 50.75(f)(1), Duke Energy Progress, LLC and Duke Energy Carolinas, LLC, collectively referred to henceforth as Duke Energy, is submitting the required Decommissioning Financial Assurance reports for Brunswick Steam Electric Plant (BNP), Units 1 and 2; Catawba Nuclear Station (CNS), Units 1 and 2; Shearon Harris Nuclear Power Plant, Unit 1 (HNP); McGuire Nuclear Station, Units 1 and 2 (MNS); Oconee Nuclear Station, Units 1, 2 and 3 (ONS); and H.B. Robinson Steam Electric Plant, Unit 2 (RNP). Enclosed are the required reports. The report for each nuclear plant contains the following information:

(1) Amount of decommissioning funds estimated to be required pursuant to 10 CFR 50.75(b) and (c).

(2) Amount accumulated to the end of the calendar year preceding the date of the report.

(3) Schedule of annual amounts remaining to be collected.

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

(5) Contracts upon which the licensee is relying pursuant to paragraph 10 CFR 50.75(e)(1)(v).

(6) Modifications occurring to a licensees current method of providing financial assurance since the last submitted report.

(7) Material changes to trust agreements.

U.S. Nuclear Regulatory Commission March 30, 2023 Page 2 The adjustment factors for labor rates and energy costs used in Item (1) for the calculation in 10 CFR 50.75(c)(2) are determined using the latest available 2022 indices from the U.S. Department of Labor, Bureau of Labor Statistics. The adjustment factor for the cost of low-level waste burial charges used in Item (1) for the calculation in 10 CFR 50.75(c)(2) is determined using NUREG-1307, Revision 19.

As a convenience to the NRC, the biennial Financial Assurance reports from each co-owner for funding the decommissioning of Catawba Nuclear Station Units 1 and 2 are identified within each unit's report. However, none of the co-owners assumes any responsibility for the information contained in any other co-owner's report.

There are no regulatory commitments associated with this letter. If you have additional questions, please contact Ryan Treadway, Director - Fleet Licensing at (980) 373-5873.

Kevin Ellis General Manager - Nuclear Regulatory Affairs, Policy & Emergency Preparedness

Enclosure:

NRC Decommissioning Funding Status Reports as of December 31, 2022

U.S. Nuclear Regulatory Commission March 30, 2023 Page 3

xc (with enclosure):

L. Dudes, USNRC, Region II Regional Administrator N. Jordan, USNRC NRR Project Manager for Duke Fleet M. Mahoney, USNRC NRR Project Manager for HNP J. Klos, USNRC NRR Project Manager for MNS S. Williams, USNRC NRR Project Manager for ONS and CNS L. Haeg, USNRC NRR Project Manager for RNP D. Rivard, USNRC Senior Resident Inspector for CNS J. Zeiler, USNRC Senior Resident Inspector for HNP C. Safouri, USNRC Senior Resident Inspector for MNS J. Nadel, USNRC Senior Resident Inspector for ONS M. Fannon, USNRC Senior Resident Inspector for RNP

ENCLOSURE NRC DECOMMISSIONING FUNDING STATUS REPORTS AS OF DECEMBER 31, 2022

Brunswick Unit 1 668,583,514 Qualified Non Qualified 562,725,385 177,797,251 Year Qualified Non Qualified 2022 2023 2024 2025 2026

1. The minimum decommissioning fund estimate, pursuant to 10 CFR 50.75 (b) and (c).

2. The amount accumulated at the end of the calendar year preceding the date of the report for items included in 10 CFR 50.75 (b) and (c). (Alternatively, the total amount accumulated at the end of the calendar year preceding the date of the report can be reported here if the cover letter transmitting the report provides the total estimate and indicates what portion of that estimate is for items not included in 10 CFR 50.75 (b) and (c)). 1,2

3. A schedule of the annual amounts remaining to be collected; for items in 10 CFR 50.75 (b) and (c). (Alternatively, the annual amounts remaining to be collected can include items beyond those required in 10 CFR 50.75 (b) and (c) if the cover letter transmitting the report provides a total cost estimate and indicates what portion of that estimate is for items that are not included in 10 CFR 50.75 (b) and (c).

2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 Total

4. The assumptions used regarding escalation in decommissioning 2.85% inflation cost, rates of earnings on decommissioning funds, and rates of 4.52% qualified rate of return other factors used in funding projections; 4.51% non-qualified rate of return

5. Any contracts upon which the licensee is relying pursuant to 10 CFR 50.75(e)(1)(v).

N/A

6. Any modifications to a licensees current method providing financial assurance occurring since the last submitted report.

N/A

7. Any material changes to trust agreements.

No 1

2 The amounts accumulated and the annual amounts remaining to be collected, together with future earnings on such amounts, include funding for both estimated reactor and ISFSI decommissioning costs.

100% Ownership Unit #1 NRC Decommissioning Funding Status Report Report Dated as of December 31, 2022 Duke Energy Progress, LLC Brunswick Nuclear Station The amounts reported are net of tax obligations

Brunswick Unit 2

1. The minimum decommissioning fund estimate, pursuant to 10 CFR 50.75 (b) and (c).

668,583,514

2. The amount accumulated at the end of the calendar year preceding the date of the report for items included in 10 CFR 50.75 (b) and (c). (Alternatively, the total amount accumulated at the end of the calendar year preceding the date of the report can be reported here if the cover letter transmitting the report provides the total estimate and indicates what portion of that estimate is Qualified Non Qualified for items not included in 10 CFR 50.75 (b) and (c)). 1 648,231,047 177,162,539

3. A schedule of the annual amounts remaining to be collected; Year Qualified Non Qualified for items in 10 CFR 50.75 (b) and (c). (Alternatively, the annual 2022 amounts remaining to be collected can include items beyond those 2023 required in 10 CFR 50.75 (b) and (c) if the cover letter 2024 transmitting the report provides a total cost estimate and 2025 indicates what portion of that estimate is for items that are not 2026 included in 10 CFR 50.75 (b) and (c).

2027 2028 2029 2030 2031 2032 2033 2034 Total

4. The assumptions used regarding escalation in decommissioning 2.80% inflation cost, rates of earnings on decommissioning funds, and rates of 4.52% qualified rate of return other factors used in funding projections; 4.41% non-qualified rate of return

5. Any contracts upon which the licensee is relying pursuant to 10 CFR 50.75(e)(1)(v).

N/A

6. Any modifications to a licensees current method providing financial assurance occurring since the last submitted report.

N/A

7. Any material changes to trust agreements.

No 1 The amounts reported are net of tax obligations 100% Ownership Unit #2 NRC Decommissioning Funding Status Report Report Dated as of December 31, 2022 Duke Energy Progress, LLC Brunswick Nuclear Station

Catawba Unit 1

1. The minimum decommissioning fund estimate, pursuant to 10 CFR 50.75 (b) and (c).

111,312,694

2. The amount accumulated at the end of the calendar year preceding the date of the report for items included in 10 CFR 50.75 (b) and (c). (Alternatively, the total amount accumulated at the end of the calendar year preceding the date of the report can be reported here if the cover letter transmitting the report provides the total estimate and indicates what portion of that estimate is Qualified Non Qualified for items not included in 10 CFR 50.75 (b) and (c)). 1 135,065,504 13,597,150

3. A schedule of the annual amounts remaining to be collected; Year Qualified Non Qualified for items in 10 CFR 50.75 (b) and (c). (Alternatively, the annual 2023 amounts remaining to be collected can include items beyond those 2024 required in 10 CFR 50.75 (b) and (c) if the cover letter 2025 transmitting the report provides a total cost estimate and 2026 indicates what portion of that estimate is for items that are not 2027 included in 10 CFR 50.75 (b) and (c).

2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 Total

4. The assumptions used regarding escalation in decommissioning 2.65% inflation cost, rates of earnings on decommissioning funds, and rates of 4.66% qualified rate of return other factors used in funding projections; 4.72% non-qualified rate of return

5. Any contracts upon which the licensee is relying pursuant to 10 CFR 50.75(e)(1)(v).

N/A

6. Any modifications to a licensees current method providing financial assurance occurring since the last submitted report.

N/A

7. Any material changes to trust agreements.

No 1 The amounts reported are net of tax obligations 19.246% Ownership Unit #1 NRC Decommissioning Funding Status Report Report Dated as of December 31, 2022 Duke Energy Carolinas, LLC Catawba Nuclear Station

Catawba Unit 2

1. The minimum decommissioning fund estimate, pursuant to 10 CFR 50.75 (b) and (c).

111,312,694

2. The amount accumulated at the end of the calendar year preceding the date of the report for items included in 10 CFR 50.75 (b) and (c). (Alternatively, the total amount accumulated at the end of the calendar year preceding the date of the report can be reported here if the cover letter transmitting the report provides the total estimate and indicates what portion of that estimate is Qualified Non Qualified for items not included in 10 CFR 50.75 (b) and (c)). 1,2 116,516,520 38,846,009

3. A schedule of the annual amounts remaining to be collected; Year Qualified Non Qualified for items in 10 CFR 50.75 (b) and (c). (Alternatively, the annual 2023 amounts remaining to be collected can include items beyond those 2024 required in 10 CFR 50.75 (b) and (c) if the cover letter 2025 transmitting the report provides a total cost estimate and 2026 indicates what portion of that estimate is for items that are not 2027 included in 10 CFR 50.75 (b) and (c).

2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 Total

4. The assumptions used regarding escalation in decommissioning 2.65% inflation cost, rates of earnings on decommissioning funds, and rates of 4.66% qualified rate of return other factors used in funding projections; 4.72% non-qualified rate of return

5. Any contracts upon which the licensee is relying pursuant to 10 CFR 50.75(e)(1)(v).

N/A

6. Any modifications to a licensees current method providing financial assurance occurring since the last submitted report.

N/A

7. Any material changes to trust agreements.

No 1 The amounts reported are net of tax obligations 2 The amounts accumulated, together with future earnings on such amounts, include funding for both estimated reactor and ISFSI decommissioning costs.

19.246% Ownership Unit #2 NRC Decommissioning Funding Status Report Report Dated as of December 31, 2022 Duke Energy Carolinas, LLC Catawba Nuclear Station

1. The minimum decommissioning fund estimate, pursuant to 10 CFR 50.75 (b) and (c).

177,871,277

2. The amount accumulated at the end of the calendar year preceding the date of the report for items included in 10 CFR 50.75 (b) and (c). (Alternatively, the total amount accumulated at the end of the calendar year preceding the date of the report can be reported here if the cover letter transmitting the report provides the total estimate and indicates what portion of that estimate is for items not included in 10 CFR 50.75 (b) and (c)). 1 153,675,258

3. A schedule of the annual amounts remaining to be collected; for items in 10 CFR 50.75 (b) and (c). (Alternatively, the annual amounts remaining to be collected can include items beyond those required in 10 CFR 50.75 (b) and (c) if the cover letter transmitting the report provides a total cost estimate and indicates what portion of that estimate is for items that are not included in 10 CFR 50.75 (b) and (c).)

Year Amount 2023 827,278 2024 923,700 2025 867,659 2026 812,139 2027 757,188 2028 702,861 2029 649,211 2030 596,300 2031 544,191 2032 492,950 2033 442,650 2034 393,368 2035 345,183 2036 298,183 2037 252,459 2038 208,107 2039 165,232 2040 123,943 2041 84,356 2042 46,594 2043 Total 9,533,552

4. The assumptions used regarding escalation in decommissioning inflation -

2.75%

cost, rates of earnings on decommissioning funds, and rates of rate of return -

4.75%

other factors used in funding projections;

5. Any contracts upon which the licensee is relying pursuant to N/A 10 CFR 50.75(e)(1)(v).

6. Any modifications to a licensees current method providing N/A financial assurance occurring since the last submitted report.

7. Any material changes to trust agreements.

No 1 The owner is tax exempt; therefore, the amounts reported are net of tax Unit #1 NRC Decommissioning Funding Status Report Report Dated as of December 31, 2022 North Carolina Electric Membership Corporation Catawba Nuclear Station 30.754% Ownership

177,871,277 164,275,246

1. The minimum decommissioning fund estimate, pursuant to 10 CFR 50.75 (b) and (c).

2. The amount accumulated at the end of the calendar year preceding the date of the report for items included in 10 CFR 50.75 (b) and (c). (Alternatively, the total amount accumulated at the end of the calendar year preceding the date of the report can be reported here if the cover letter transmitting the report provides the total estimate and indicates what portion of that estimate is for items not included in 10 CFR 50.75 (b) and (c)). 1, 2

3. A schedule of the annual amounts remaining to be collected; for items in 10 CFR 50.75 (b) and (c). (Alternatively, the annual amounts remaining to be collected can include items beyond those required in 10 CFR 50.75 (b) and (c) if the cover letter transmitting the report provides a total cost estimate and indicates what portion of that estimate is for items that are not included in 10 CFR 50.75 (b) and (c).)2 Year Amount 2023 960,658 2024 1,072,626 2025 1,007,550 2026 943,078 2027 879,268 2028 816,181 2029 753,882 2030 692,440 2031 631,929 2032 572,427 2033 514,018 2034 456,789 2035 400,836 2036 346,258 2037 293,162 2038 241,660 2039 191,873 2040 143,926 2041 97,956 2042 54,106 2043 Total 11,070,623

4. The assumptions used regarding escalation in decommissioning inflation -

2.75%

cost, rates of earnings on decommissioning funds, and rates of rate of return -

4.75%

other factors used in funding projections;

5. Any contracts upon which the licensee is relying pursuant to N/A 10 CFR 50.75(e)(1)(v).

6. Any modifications to a licensees current method providing N/A financial assurance occurring since the last submitted report.

7. Any material changes to trust agreements.

No 1

2 The owner is tax exempt; therefore, the amounts reported are net of tax The amount acumulated and the annual amounts remaining to be collected, together with future earnings on such amounts, include funding for both estimated reactor and ISFSI decommissioning costs.

Unit #2 NRC Decommissioning Funding Status Report Report Dated as of December 31, 2022 North Carolina Electric Membership Corporation Catawba Nuclear Station 30.754% Ownership

1. The minimum decommissioning fund estimate, pursuant to 10 CFR 50.75 (b) and (c).

216,887,978

2. The amount accumulated at the end of the calendar year preceding the date of the report for items included in 10 CFR 50.75 (b) and (c). (Alternatively, the total amount accumulated at the end of the calendar year preceding the date of the report can be reported here if the cover letter transmitting the report provides the total estimate and indicates what portion of that estimate is for items not included in 10 CFR 50.75 (b) and (c)). 1 200,286,589

3. A schedule of the annual amounts remaining to be collected; for items in 10 CFR 50.75 (b) and (c). (Alternatively, the annual amounts remaining to be collected can include items beyond those required in 10 CFR 50.75 (b) and (c) if the cover letter transmitting the report provides a total cost estimate and indicates what portion of that estimate is for items that are not included in 10 CFR 50.75 (b) and (c).

Year Amount 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 Total

4. The assumptions used regarding escalation in decommissioning inflation -

3.40%

cost, rates of earnings on decommissioning funds, and rates of rate of return -

4.35%

other factors used in funding projections;

5. Any contracts upon which the licensee is relying pursuant to N/A 10 CFR 50.75(e)(1)(v).

6. Any modifications to a licensees current method providing N/A financial assurance occurring since the last submitted report.

7. Any material changes to trust agreements.

Yes2 1

2 Investment provisions of the trust agreement were modified in 2021 to reflect changes in legislation allowing NCMPA to invest in the North Carolina Ancillary Government Participant Investment Program The owner is tax exempt; therefore, the amounts reported are net of tax NRC Decommissioning Funding Status Report Report Dated as of December 31, 2022 North Carolina Municipal Power Agency 1 Catawba Nuclear Station 37.5% Ownership Unit #1

1. The minimum decommissioning fund estimate, pursuant to 10 CFR 50.75 (b) and (c).

216,887,978

2. The amount accumulated at the end of the calendar year preceding the date of the report for items included in 10 CFR 50.75 (b) and (c). (Alternatively, the total amount accumulated at the end of the calendar year preceding the date of the report can be reported here if the cover letter transmitting the report provides the total estimate and indicates what portion of that estimate is for items not included in 10 CFR 50.75 (b) and (c)). 1, 2 198,659,025

3. A schedule of the annual amounts remaining to be collected; for items in 10 CFR 50.75 (b) and (c). (Alternatively, the annual amounts remaining to be collected can include items beyond those required in 10 CFR 50.75 (b) and (c) if the cover letter transmitting the report provides a total cost estimate and indicates what portion of that estimate is for items that are not included in 10 CFR 50.75 (b) and (c).

Year Amount 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 Total

4. The assumptions used regarding escalation in decommissioning inflation -

3.40%

cost, rates of earnings on decommissioning funds, and rates of rate of return -

4.35%

other factors used in funding projections;

5. Any contracts upon which the licensee is relying pursuant to N/A 10 CFR 50.75(e)(1)(v).

6. Any modifications to a licensees current method providing N/A financial assurance occurring since the last submitted report.

7. Any material changes to trust agreements.

Yes3 1

2 3 Investment provisions of the trust agreement were modified in 2021 to reflect changes in legislation allowing NCMPA to invest in the North Carolina Ancillary Government Participant Investment Program The owner is tax exempt; therefore, the amounts reported are net of tax The amount acumulated and the annual amounts remaining to be collected, together with future earnings on such amounts, include funding for both estimated reactor and ISFSI decommissioning costs.

Unit #2 NRC Decommissioning Funding Status Report Report Dated as of December 31, 2022 North Carolina Municipal Power Agency 1 Catawba Nuclear Station 37.5% Ownership

1. The minimum decommissioning fund estimate, pursuant to 10 CFR 50.75 (b) and (c).

72,295,993

2. The amount accumulated at the end of the calendar year preceding the date of the report for items included in 10 CFR 50.75 (b) and (c). (Alternatively, the total amount accumulated at the end of the calendar year preceding the date of the report can be reported here if the cover letter transmitting the report provides the total estimate and indicates what portion of that estimate is for items not included in 10 CFR 50.75 (b) and (c)). 1 50,463,753

3. A schedule of the annual amounts remaining to be collected; for items in 10 CFR 50.75 (b) and (c). (Alternatively, the annual amounts remaining to be collected can include items beyond those required in 10 CFR 50.75 (b) and (c) if the cover letter transmitting the report provides a total cost estimate and indicates what portion of that estimate is for items that are not included in 10 CFR 50.75 (b) and (c).

Year Amount 2023 3,402,469 2024 3,402,469 2025 3,402,469 2026 3,402,469 2027 3,402,469 2028 3,402,469 2029 3,402,469 2030 3,402,469 2031 3,402,469 2032 3,402,469 2033 3,402,469 2034 22,752,908 2

2035 1,984,774 2036 2037 2038 2039 2040 2041 2042 2043 Total 62,164,842

4. The assumptions used regarding escalation in decommissioning inflation -

2.75%

cost, rates of earnings on decommissioning funds, and rates of rate of return -

3.00%

other factors used in funding projections;

5. Any contracts upon which the licensee is relying pursuant to N/A 10 CFR 50.75(e)(1)(v).

6. Any modifications to a licensees current method providing N/A financial assurance occurring since the last submitted report.

7. Any material changes to trust agreements.

No 1

2 The large contribution in 2034 will be from a bond fund that matures and becomes unrestricted at that time The owner is tax exempt; therefore, the amounts reported are net of tax Unit #1 NRC Decommissioning Funding Status Report Report Dated as of December 31, 2022 Piedmont Municipal Power Agency Catawba Nuclear Station 12.5% Ownership

72,295,993 61,367,879

1. The minimum decommissioning fund estimate, pursuant to 10 CFR 50.75 (b) and (c).

2. The amount accumulated at the end of the calendar year preceding the date of the report for items included in 10 CFR 50.75 (b) and (c). (Alternatively, the total amount accumulated at the end of the calendar year preceding the date of the report can be reported here if the cover letter transmitting the report provides the total estimate and indicates what portion of that estimate is for items not included in 10 CFR 50.75 (b) and (c)). 1, 2

3. A schedule of the annual amounts remaining to be collected; for items in 10 CFR 50.75 (b) and (c). (Alternatively, the annual amounts remaining to be collected can include items beyond those required in 10 CFR 50.75 (b) and (c) if the cover letter transmitting the report provides a total cost estimate and indicates what portion of that estimate is for items that are not included in 10 CFR 50.75 (b) and (c).2 Year Amount 2023 5,760,299 2024 5,760,299 2025 5,760,299 2026 5,760,299 2027 5,760,299 2028 5,760,299 2029 5,760,299 2030 5,760,299 2031 5,760,299 2032 5,760,299 2033 5,760,299 2034 25,110,737 3

2035 3,360,174 2036 2037 2038 2039 2040 2041 2042 2043 Total 91,834,200

4. The assumptions used regarding escalation in decommissioning inflation -

2.75%

cost, rates of earnings on decommissioning funds, and rates of rate of return -

3.00%

other factors used in funding projections;

5. Any contracts upon which the licensee is relying pursuant to N/A 10 CFR 50.75(e)(1)(v).

6. Any modifications to a licensees current method providing N/A financial assurance occurring since the last submitted report.

7. Any material changes to trust agreements.

No 1

2 3 The large contribution in 2034 will be from a bond fund that matures and becomes unrestricted at that time The owner is tax exempt; therefore, the amounts reported are net of tax The amount acumulated and the annual amounts remaining to be collected, together with future earnings on such amounts, include funding for both estimated reactor and ISFSI decommissioning costs.

Unit #2 NRC Decommissioning Funding Status Report Report Dated as of December 31, 2022 Piedmont Municipal Power Agency Catawba Nuclear Station 12.5% Ownership

Harris Unit 1

1. The minimum decommissioning fund estimate, pursuant to 10 CFR 50.75 (b) and (c).

548,111,793

2. The amount accumulated at the end of the calendar year preceding the date of the report for items included in 10 CFR 50.75 (b) and (c). (Alternatively, the total amount accumulated at the end of the calendar year preceding the date of the report can be reported here if the cover letter transmitting the report provides the total estimate and indicates what portion of that estimate is Qualified Non Qualified for items not included in 10 CFR 50.75 (b) and (c)). 1 651,052,198 79,130,404

3. A schedule of the annual amounts remaining to be collected; Year Qualified Non Qualified for items in 10 CFR 50.75 (b) and (c). (Alternatively, the annual 2022 amounts remaining to be collected can include items beyond those 2023 required in 10 CFR 50.75 (b) and (c) if the cover letter 2024 transmitting the report provides a total cost estimate and 2025 indicates what portion of that estimate is for items that are not 2026 included in 10 CFR 50.75 (b) and (c).

2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 Total

4. The assumptions used regarding escalation in decommissioning 2.67% inflation cost, rates of earnings on decommissioning funds, and rates of 4.61% qualified rate of return other factors used in funding projections; 2.42% non-qualified rate of return

5. Any contracts upon which the licensee is relying pursuant to 10 CFR 50.75(e)(1)(v).

N/A

6. Any modifications to a licensees current method providing financial assurance occurring since the last submitted report.

N/A

7. Any material changes to trust agreements.

No 1 The amounts reported are net of tax obligations 100% Ownership Unit #1 NRC Decommissioning Funding Status Report Report Dated as of December 31, 2022 Duke Energy Progress, LLC Harris Nuclear Station

McGuire Unit 1

1. The minimum decommissioning fund estimate, pursuant to 10 CFR 50.75 (b) and (c).

570,144,343

2. The amount accumulated at the end of the calendar year preceding the date of the report for items included in 10 CFR 50.75 (b) and (c). (Alternatively, the total amount accumulated at the end of the calendar year preceding the date of the report can be reported here if the cover letter transmitting the report provides the total estimate and indicates what portion of that estimate is Qualified Non Qualified for items not included in 10 CFR 50.75 (b) and (c)). 1 718,712,372 2,910,091

3. A schedule of the annual amounts remaining to be collected; Year Qualified Non Qualified for items in 10 CFR 50.75 (b) and (c). (Alternatively, the annual 2023 amounts remaining to be collected can include items beyond those 2024 required in 10 CFR 50.75 (b) and (c) if the cover letter 2025 transmitting the report provides a total cost estimate and 2026 indicates what portion of that estimate is for items that are not 2027 included in 10 CFR 50.75 (b) and (c).

2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 Total

4. The assumptions used regarding escalation in decommissioning 2.65% inflation cost, rates of earnings on decommissioning funds, and rates of 4.66% qualified rate of return other factors used in funding projections; 4.72% non-qualified rate of return

5. Any contracts upon which the licensee is relying pursuant to 10 CFR 50.75(e)(1)(v).

N/A

6. Any modifications to a licensees current method providing financial assurance occurring since the last submitted report.

N/A

7. Any material changes to trust agreements.

No 1 The amounts reported are net of tax obligations 100% Ownership Unit #1 NRC Decommissioning Funding Status Report Report Dated as of December 31, 2022 Duke Energy Carolinas, LLC McGuire Nuclear Station

McGuire Unit 2

1. The minimum decommissioning fund estimate, pursuant to 10 CFR 50.75 (b) and (c).

570,144,343

2. The amount accumulated at the end of the calendar year preceding the date of the report for items included in 10 CFR 50.75 (b) and (c). (Alternatively, the total amount accumulated at the end of the calendar year preceding the date of the report can be reported here if the cover letter transmitting the report provides the total estimate and indicates what portion of that estimate is Qualified Non Qualified for items not included in 10 CFR 50.75 (b) and (c)). 1, 2 789,394,603

3. A schedule of the annual amounts remaining to be collected; Year Qualified Non Qualified for items in 10 CFR 50.75 (b) and (c). (Alternatively, the annual 2023 amounts remaining to be collected can include items beyond those 2024 required in 10 CFR 50.75 (b) and (c) if the cover letter 2025 transmitting the report provides a total cost estimate and 2026 indicates what portion of that estimate is for items that are not 2027 included in 10 CFR 50.75 (b) and (c).

2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 Total

4. The assumptions used regarding escalation in decommissioning 2.65% inflation cost, rates of earnings on decommissioning funds, and rates of 4.66% qualified rate of return other factors used in funding projections; 4.72% non-qualified rate of return

5. Any contracts upon which the licensee is relying pursuant to 10 CFR 50.75(e)(1)(v).

N/A

6. Any modifications to a licensees current method providing financial assurance occurring since the last submitted report.

N/A

7. Any material changes to trust agreements.

No 1 The amounts reported are net of tax obligations 2

The amounts accumulated, together with future earnings on such amounts, include funding for both estimated reactor and ISFSI decommissioning costs.

100% Ownership Unit #2 NRC Decommissioning Funding Status Report Report Dated as of December 31, 2022 Duke Energy Carolinas, LLC McGuire Nuclear Station

Oconee Unit 1

1. The minimum decommissioning fund estimate, pursuant to 10 CFR 50.75 (b) and (c).

537,597,960

2. The amount accumulated at the end of the calendar year preceding the date of the report for items included in 10 CFR 50.75 (b) and (c). (Alternatively, the total amount accumulated at the end of the calendar year preceding the date of the report can be reported here if the cover letter transmitting the report provides the total estimate and indicates what portion of that estimate is Qualified Non Qualified for items not included in 10 CFR 50.75 (b) and (c)). 1 567,145,719 39,662,643

3. A schedule of the annual amounts remaining to be collected; Year Qualified Non Qualified for items in 10 CFR 50.75 (b) and (c). (Alternatively, the annual 2023 amounts remaining to be collected can include items beyond those 2024 required in 10 CFR 50.75 (b) and (c) if the cover letter 2025 transmitting the report provides a total cost estimate and 2026 indicates what portion of that estimate is for items that are not 2027 included in 10 CFR 50.75 (b) and (c).

2028 2029 2030 2031 2032 2033 Total 2.65% inflation 4.66% qualified rate of return 4.72% non-qualified rate of return N/A N/A

4. The assumptions used regarding escalation in decommissioning cost, rates of earnings on decommissioning funds, and rates of other factors used in funding projections;

5. Any contracts upon which the licensee is relying pursuant to 10 CFR 50.75(e)(1)(v).

6. Any modifications to a licensees current method providing financial assurance occurring since the last submitted report.

7. Any material changes to trust agreements.

No 1 The amounts reported are net of tax obligations 100% Ownership Unit #1 NRC Decommissioning Funding Status Report Report Dated as of December 31, 2022 Duke Energy Carolinas, LLC Oconee Nuclear Station

Oconee Unit 2

1. The minimum decommissioning fund estimate, pursuant to 10 CFR 50.75 (b) and (c).

537,597,960

2. The amount accumulated at the end of the calendar year preceding the date of the report for items included in 10 CFR 50.75 (b) and (c). (Alternatively, the total amount accumulated at the end of the calendar year preceding the date of the report can be reported here if the cover letter transmitting the report provides the total estimate and indicates what portion of that estimate is Qualified Non Qualified for items not included in 10 CFR 50.75 (b) and (c)). 1 569,795,380 31,991,302

3. A schedule of the annual amounts remaining to be collected; Year Qualified Non Qualified for items in 10 CFR 50.75 (b) and (c). (Alternatively, the annual 2023 amounts remaining to be collected can include items beyond those 2024 required in 10 CFR 50.75 (b) and (c) if the cover letter 2025 transmitting the report provides a total cost estimate and 2026 indicates what portion of that estimate is for items that are not 2027 included in 10 CFR 50.75 (b) and (c).

2028 2029 2030 2031 2032 2033 Total

4. The assumptions used regarding escalation in decommissioning 2.65% inflation cost, rates of earnings on decommissioning funds, and rates of 4.66% qualified rate of return other factors used in funding projections; 4.72% non-qualified rate of return

5. Any contracts upon which the licensee is relying pursuant to 10 CFR 50.75(e)(1)(v).

N/A

6. Any modifications to a licensees current method providing financial assurance occurring since the last submitted report.

N/A

7. Any material changes to trust agreements.

No 1 The amounts reported are net of tax obligations 100% Ownership Unit #2 NRC Decommissioning Funding Status Report Report Dated as of December 31, 2022 Duke Energy Carolinas, LLC Oconee Nuclear Station

Oconee Unit 3

1. The minimum decommissioning fund estimate, pursuant to 10 CFR 50.75 (b) and (c).

537,597,960

2. The amount accumulated at the end of the calendar year preceding the date of the report for items included in 10 CFR 50.75 (b) and (c). (Alternatively, the total amount accumulated at the end of the calendar year preceding the date of the report can be reported here if the cover letter transmitting the report provides the total estimate and indicates what portion of that estimate is Qualified Non Qualified for items not included in 10 CFR 50.75 (b) and (c)). 1, 2 771,879,053 9,054,496

3. A schedule of the annual amounts remaining to be collected; Year Qualified Non Qualified for items in 10 CFR 50.75 (b) and (c). (Alternatively, the annual 2023 amounts remaining to be collected can include items beyond those 2024 required in 10 CFR 50.75 (b) and (c) if the cover letter 2025 transmitting the report provides a total cost estimate and 2026 indicates what portion of that estimate is for items that are not 2027 included in 10 CFR 50.75 (b) and (c).

2028 2029 2030 2031 2032 2033 2034 Total

4. The assumptions used regarding escalation in decommissioning 2.65% inflation cost, rates of earnings on decommissioning funds, and rates of 4.66% qualified rate of return other factors used in funding projections; 4.72% non-qualified rate of return

5. Any contracts upon which the licensee is relying pursuant to 10 CFR 50.75(e)(1)(v).

N/A

6. Any modifications to a licensees current method providing financial assurance occurring since the last submitted report.

N/A

7. Any material changes to trust agreements.

No 1 The amounts reported are net of tax obligations 2 The amounts accumulated, together with future earnings on such amounts, include funding for both estimated reactor and ISFSI decommissioning costs.

100% Ownership Unit #3 NRC Decommissioning Funding Status Report Report Dated as of December 31, 2022 Duke Energy Carolinas, LLC Oconee Nuclear Station

Robinson Unit 2 526,497,702 Qualified Non Qualified 820,209,014 13,680,087 Year Qualified Non Qualified 2022 2023 2024 2025 2026

1. The minimum decommissioning fund estimate, pursuant to 10 CFR 50.75 (b) and (c).

2. The amount accumulated at the end of the calendar year preceding the date of the report for items included in 10 CFR 50.75 (b) and (c). (Alternatively, the total amount accumulated at the end of the calendar year preceding the date of the report can be reported here if the cover letter transmitting the report provides the total estimate and indicates what portion of that estimate is for items not included in 10 CFR 50.75 (b) and (c)). 1,2

3. A schedule of the annual amounts remaining to be collected; for items in 10 CFR 50.75 (b) and (c). (Alternatively, the annual amounts remaining to be collected can include items beyond those required in 10 CFR 50.75 (b) and (c) if the cover letter transmitting the report provides a total cost estimate and indicates what portion of that estimate is for items that are not included in 10 CFR 50.75 (b) and (c).

2027 2028 2029 2030 Total

4. The assumptions used regarding escalation in decommissioning 2.82% inflation cost, rates of earnings on decommissioning funds, and rates of 4.53% qualified rate of return other factors used in funding projections; 2.50% non-qualified rate of return

5. Any contracts upon which the licensee is relying pursuant to 10 CFR 50.75(e)(1)(v).

N/A

6. Any modifications to a licensees current method providing financial assurance occurring since the last submitted report.

N/A

7. Any material changes to trust agreements.

No 1

2 The amounts accumulated and the annual amounts remaining to be collected, together with future earnings on such amounts, include funding for both estimated reactor and ISFSI decommissioning costs.

100% Ownership Unit #2 NRC Decommissioning Funding Status Report Report Dated as of December 31, 2022 Duke Energy Progress, LLC Robinson Nuclear Station The amounts reported are net of tax obligations