Text

Constellation Energy Generation, LLC, Report on Status of Decommissioning Funding for Reactors and Independent Spent Fuel Storage Installations
	ML23082A312
Person / Time
Site:	Calvert Cliffs, Dresden, Peach Bottom, Salem, Nine Mile Point, Byron, Braidwood, Limerick, Ginna, Clinton, Quad Cities, FitzPatrick, LaSalle, Crane
Issue date:	03/23/2023
From:	Simpson P; Constellation Energy Generation
To:	; Office of Nuclear Material Safety and Safeguards, Office of Nuclear Reactor Regulation, Document Control Desk
References
	RS-23-049
	Download: ML23082A312 (1)
	v • d • e

4300 Winfield Road Warrenville, IL 60555 630 657 2000 Office RS-23-049 10 CFR 50.75(f) 10 CFR 72.30(b) 10 CFR 50.82(a)

March 23, 2023 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Braidwood Station, Units 1 and 2 Renewed Facility Operating License Nos. NPF-72 and NPF-77 NRC Docket Nos. STN 50-456, STN 50-457, and 72-73 Byron Station, Units 1 and 2 Renewed Facility Operating License Nos. NPF-37 and NPF-66 NRC Docket Nos. STN 50-454, STN 50-455, and 72-68 Calvert Cliffs Nuclear Power Plant, Units 1 and 2 Renewed Facility Operating License Nos. DPR-53 and DPR-69 NRC Docket Nos. 50-317 and 50-318 Clinton Power Station, Unit 1 Facility Operating License No. NPF-62 NRC Docket Nos. 50-461 and 72-1046 Dresden Nuclear Power Station, Units 1, 2 and 3 Facility Operating License No. DPR-2 Renewed Facility Operating License Nos. DPR-19 and DPR-25 NRC Docket Nos. 50-10, 50-237, 50-249, and 72-37 James. A FitzPatrick Nuclear Power Plant Renewed Facility Operating License No. DPR-59 NRC Docket Nos. 50-333 and 72-12 LaSalle County Station, Units 1 and 2 Renewed Facility Operating License Nos. NPF-11 and NPF-18 NRC Docket Nos. 50-373, 50-374, and 72-70 Limerick Generating Station, Units 1 and 2 Renewed Facility Operating License Nos. NPF-39 and NPF-85 NRC Docket Nos. 50-352, 50-353, and 72-65 Nine Mile Point Nuclear Station, Units 1 and 2 Renewed Facility Operating License Nos. DPR-63 and NPF-69 NRC Docket Nos. 50-220, 50-410, and 72-1036

March 23, 2023 U.S. Nuclear Regulatory Commission Page 2 Peach Bottom Atomic Power Station, Units 1, 2, and 3 Facility Operating License No. DPR-12 Subsequent Renewed Facility Operating License Nos. DPR-44 and DPR-56 NRC Docket Nos. 50-171, 50-277, 50-278, and 72-29 Quad Cities Nuclear Power Station, Units 1 and 2 Renewed Facility Operating License Nos. DPR-29 and DPR-30 NRC Docket Nos. 50-254, 50-265, and 72-53 R.E. Ginna Nuclear Power Plant Renewed Facility Operating License No. DPR-18 NRC Docket Nos. 50-244 and 72-67 Salem Generating Station, Units 1 and 2 Renewed Facility Operating License Nos. DPR-70 and DPR-75 NRC Docket Nos. 50-272, 50-311, and 72-48 Three Mile Island Nuclear Station, Unit 1 Renewed Facility Operating License No. DPR-50 NRC Docket Nos. 50-289 and 72-77 Calvert Cliffs Nuclear Power Plant, Units 1 and 2 Independent Spent Fuel Storage Installation Materials License No. SNM-2505 NRC Docket No. 72-08

Subject:

Report on Status of Decommissioning Funding for Reactors and Independent Spent Fuel Storage Installations In accordance with 10 CFR 50.75, "Reporting and recordkeeping for decommissioning planning," paragraph (f), Constellation Energy Generation, LLC (CEG) is submitting a report on the status of decommissioning funding for the reactors owned or co-owned by CEG.

Additionally, in accordance with 10 CFR 72.30, "Financial assurance and recordkeeping for decommissioning," CEG is submitting updates to the decommissioning funding plans for the independent spent fuel storage installations (ISFSIs) owned or co-owned by CEG.1 Updated decommissioning cost estimates for ISFSI decommissioning are provided in the attached report in Attachments 29 and 30. With respect to the other information required by 10 CFR 72.30(b) and (c), unless otherwise noted in Attachment 30, there have been no changes from the information provided in the initial ISFSI decommissioning funding plans (see Attachment 30, References 1, 2, 3, and 5).

1 CEG currently has ISFSIs at each of its sites.

March 23, 2023 U.S. Nuclear Regulatory Commission Page 3 In accordance with 10 CFR 50.75(b)(4), 50.75(c), and 50.75(f), the estimated cost of decommissioning for financial assurance is based on either the NRC formula cost amount calculated in accordance with 10 CFR 50.75(c) or site-specific decommissioning cost estimates.

If used in this report, the site-specific decommissioning cost estimates are based on a period of safe storage that is specifically described in the estimates. Site-specific cash flows from the site-specific cost estimates are included, as applicable. Unless otherwise noted, the specific cash flow analysis for the site-specific decommissioning cost estimates conservatively assumes all expenses in a year are incurred at the beginning of year (i.e., beginning of year convention) during the decommissioning period. The cash flow analysis for Peach Bottom Atomic Power Station (PBAPS), Unit 1 assumes that half of the current year contributions are included in the current year earnings to estimate payment of contributions throughout the year (i.e., a mid-year convention). CEG uses a mid-year convention in this instance because the contributions are made monthly at a constant rate throughout the year.

Nine Mile Point Nuclear Station, Unit 2 is co-owned by Nine Mile Point Nuclear Station, LLC (82%), an indirect CEG co-owned subsidiary, and Long Island Power Authority (LIPA) (18%).

The information provided in this letter for Nine Mile Point Nuclear Station, Unit 2 includes summary statements provided and verified by LIPA.

For shutdown units, the reporting requirements of 10 CFR 50.82(a)(8)(v) and (vii) are also included in this report.

CEG has not made a final determination of the decommissioning option for any of its operating nuclear units. CEG uses the formula cost amount or the site-specific decommissioning cost estimates to demonstrate adequacy of funding to meet regulatory requirements. To the extent the site-specific cost estimates assume a decommissioning option, CEG may select a different decommissioning option in the future for any of its nuclear units, recognizing that the chosen option must meet NRC requirements for decommissioning funding.

Financial assurance for decommissioning has been provided for all units.

Due to recent market performance, Peach Bottom, Unit 1, did not meet the minimum funding assurance criteria under 10 CFR 50.75 and 10 CFR 50.82 as of December 31, 2022, based solely on the trust fund balance. Financial assurance for decommissioning this reactor is provided by the external sinking fund method, coupled with an external trust fund, in accordance with 10 CFR 50.75(e)(1)(ii). The source of revenue for the external sinking fund is a "non-bypassable charge" approved by the Pennsylvania Public Utilities Commission (PaPUC) authorizing PECO Energy Company to continue to collect decommissioning funds for CEG.

The amount to be collected will be adjusted, as necessary, in accordance with the applicable tariff in the next submission to the PaPUC of the Nuclear Decommissioning Cost Adjustment (NDCA) to cover any funding shortfall that exists at that time. This cost adjustment is made every five years pursuant to PaPUC Electric Tariff No. 4. The next rate adjustment will be effective January 1, 2028. The PaPUC was notified that the amount collected may need to be adjusted in the next filing. CEG's ability to adjust the amount collected for Peach Bottom, Unit 1, is consistent with the guidance in Regulatory Guide 1.159, "Assuring Availability of Funds for Decommissioning Nuclear Reactors," Revision 2, page 13, which provides that, "Adjustments to the annual amount of funds being set aside may be made to coincide with rate cases considered by a licensee's public utility commission (PUC)."

March 23, 2023 U.S. Nuclear Regulatory Commission Page 4 Disbursements made through December 31, 2022 from the decommissioning trust funds since the last report, other than those for allowed administrative costs and other incidental expenses of the fund in connection with the operation of the fund per 10 CFR 50.75(h)(1)(iv), were in support of decommissioning planning. Dresden Unit 1, Peach Bottom Unit 1, and Three Mile Island Unit 1 disbursements contained additional costs in support of decommissioning activities as outlined in their respective attachments.

There are no regulatory commitments contained within this letter.

If you have any questions concerning this letter, please contact me at (630) 657-2823.

Respectfully, Patrick R. Simpson Sr. Manager - Licensing Constellation Energy Generation, LLC cc:

Regional Administrator - NRC Region I Regional Administrator - NRC Region III NRC Senior Resident Inspector - Braidwood Station NRC Senior Resident Inspector - Byron Station NRC Senior Resident Inspector - Calvert Cliffs Nuclear Power Plant NRC Senior Resident Inspector - Clinton Power Station NRC Senior Resident Inspector - Dresden Nuclear Power Station NRC Senior Resident Inspector - James A. FitzPatrick Nuclear Power Station NRC Senior Resident Inspector - LaSalle County Station NRC Senior Resident Inspector - Limerick Generating Station NRC Senior Resident Inspector - Nine Mile Point Nuclear Station NRC Senior Resident Inspector - Peach Bottom Atomic Power Station NRC Senior Resident Inspector - Quad Cities Nuclear Power Station NRC Senior Resident Inspector - R.E. Ginna Nuclear Power Plant NRC Senior Resident Inspector - Salem Generating Station NRC Senior Resident Inspector - Three Mile Island Nuclear Station

March 23, 2023 U.S. Nuclear Regulatory Commission Page 5 Attachments:

1.

Labor, Energy, and Burial Factors Used in Calculations (All Facilities)

2.

Annual Radiological Decommissioning Funding Assurance Report for Braidwood Station, Unit 1

3.

Annual Radiological Decommissioning Funding Assurance Report for Braidwood Station, Unit 2

4.

Annual Radiological Decommissioning Funding Assurance Report for Byron Station, Unit 1

5.

Annual Radiological Decommissioning Funding Assurance Report for Byron Station, Unit 2

6.

Annual Radiological Decommissioning Funding Assurance Report for Calvert Cliffs Nuclear Power Plant, Unit 1

7.

Annual Radiological Decommissioning Funding Assurance Report for Calvert Cliffs Nuclear Power Plant, Unit 2

8.

Annual Radiological Decommissioning Funding Assurance Report for Clinton Power Station, Unit 1

9.

Annual Radiological Decommissioning Funding Assurance and Spent Fuel Management Report for Dresden Nuclear Power Station, Unit 1

10. Annual Radiological Decommissioning Funding Assurance Report for Dresden Nuclear Power Station, Unit 2

11. Annual Radiological Decommissioning Funding Assurance Report for Dresden Nuclear Power Station, Unit 3

12. Annual Radiological Decommissioning Funding Assurance Report for James A. FitzPatrick Nuclear Power Station

13. Annual Radiological Decommissioning Funding Assurance Report for LaSalle County Station, Unit 1

14. Annual Radiological Decommissioning Funding Assurance Report for LaSalle County Station, Unit 2

15. Annual Radiological Decommissioning Funding Assurance Report for Limerick Generating Station, Unit 1

16. Annual Radiological Decommissioning Funding Assurance Report for Limerick Generating Station, Unit 2

17. Annual Radiological Decommissioning Funding Assurance Report for Nine Mile Point Nuclear Station, Unit 1

18. Annual Radiological Decommissioning Funding Assurance Report for Nine Mile Point Nuclear Station, Unit 2 CEG Portion

19. Annual Radiological Decommissioning Funding Assurance Report for Nine Mile Point Nuclear Station, Unit 2 LIPA Portion

20. Annual Radiological Decommissioning Funding Assurance Report for Peach Bottom Atomic Power Station, Unit 1

21. Annual Radiological Decommissioning Funding Assurance Report for Peach Bottom Atomic Power Station, Unit 2

22. Annual Radiological Decommissioning Funding Assurance Report for Peach Bottom Atomic Power Station, Unit 3

23. Annual Radiological Decommissioning Funding Assurance Report for Quad Cities Nuclear Power Station, Unit 1

24. Annual Radiological Decommissioning Funding Assurance Report for Quad Cities Nuclear Power Station, Unit 2

25. Annual Radiological Decommissioning Funding Assurance Report for R.E. Ginna Nuclear Power Plant

March 23, 2023 U.S. Nuclear Regulatory Commission Page 6

26. Annual Radiological Decommissioning Funding Assurance Report for Salem Generating Station, Unit 1

27. Annual Radiological Decommissioning Funding Assurance Report for Salem Generating Station, Unit 2

28. Annual Radiological Decommissioning Funding Assurance and Spent Fuel Management Report for Three Mile Island Nuclear Station, Unit 1

29. ISFSI Decommissioning Funding Estimates

30. Independent Spent Fuel Storage Installation Decommissioning Funding Plan Updates

ATTACHMENT 1 Labor, Energy, and Burial Factors Used in Calculations (All Facilities)

Page 1 of 2 ATTACHMENT 1 Labor, Energy, and Burial Factors Used in Calculations (All Facilities)

The labor, energy, and burial indexes used are consistent with those described in NUREG-1307, Revision 19, issued February 13, 2023.

The current labor cost indexes used are obtained from the Employment Cost Index, published by the U.S. Department of Labor, Bureau of Labor Statistics (BLS).

Specifically, Constellation Energy Generation, LLC (CEG) used the Employment Cost Index for total compensation for private industry workers by region. The labor adjustment factors were calculated according to Section 3.2 of NUREG-1307, Revision 19, using fourth quarter 2022 data. Table 1 shows the data used for this calculation.

Table 1: Labor Adjustment Factors Region Applicable Sites Series ID 4Q2022 Index Number Base Lx Labor Adjustment Factor (Lx)

Northeast James A. FitzPatrick Limerick Nine Mile Point Peach Bottom R.E. Ginna Salem TMI CIU2010000000210I 157.0 2.16 3.391 South Calvert Cliffs CIU2010000000220I 152.9 1.98 3.027 Midwest Braidwood Byron Clinton Dresden LaSalle Quad Cities CIU2010000000230I 152.8 2.08 3.178 The current energy cost indexes used are obtained from Producer Price Indexes (PPI) -

Commodities, published by the U.S. Department of Labor, BLS. Specifically, CEG used the PPI for industrial electric power (WPU0543) and light fuel oils (WPU0573). The energy adjustment factors were calculated according to Section 3.3 of NUREG-1307, Revision 19, using December 2022 data. Table 2 shows the data used for this calculation.

Table 2: Energy Adjustment Factors WPU0543 - January 1986 (base value) 114.2 WPU0573 - January 1986 (base value) 82.0 WPU0543 - December 2022 (preliminary value) 279.1 WPU0573 - December 2022 (preliminary value) 392.6 Industrial electric power adjustment factor - Px 2.448 Light fuel oil adjustment factor - Fx 4.788 Energy Adjustment Factor (PWR) - Ex(PWR) 3.428 Energy Adjustment Factor (BWR) - Ex(BWR) 3.522

Page 2 of 2 ATTACHMENT 1 (Continued)

Labor, Energy, and Burial Factors Used in Calculations (All Facilities)

The waste burial adjustment factors used are taken from Table 2-1 of NUREG-1307, Revision 19, based on 2022 data. The adjustment factors CEG used assume a combination of compact-affiliated and non-compact facilities for sites affiliated with a compact. This is consistent with current waste disposal practices at CEG and consistent with typical waste disposal practices during decommissioning. For sites not affiliated with a compact, the values for generators located in unaffiliated states were used.

Table 3 summarizes the data used for the calculation of the waste adjustment factors.

Table 3: Waste Adjustment Factors LLW Burial Site Reactor Type Applicable Site Combination of Compact-Affiliated and Non-Compact Disposal Facilities Waste Adjustment Factor (Bx)

Generators Located in the Unaffiliated States and those Located in Compact-Affiliated States having no Disposal Facility Waste Adjustment Factor (Bx)

South Carolina site Atlantic Compact PWR Salem 14.067 N/A Generic LLW Disposal Site BWR Clinton Dresden James A. FitzPatrick LaSalle Limerick Nine Mile Point Peach Bottom Quad Cities N/A 12.296 Generic LLW Disposal Site PWR Braidwood Byron Calvert Cliffs R.E. Ginna TMI N/A 13.711 The calculation methodology used for all adjustment factors is consistent with NUREG-1307, Revision 19.

ATTACHMENT 2 Annual Radiological Decommissioning Funding Assurance Report for Braidwood Station, Unit 1

Page 1 of 1 ATTACHMENT 2 Annual Radiological Decommissioning Funding Assurance Report for Braidwood Station, Unit 1 (December 31, 2022 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c)

$ 580,438 2

Site-specific cost amount per 10 CFR 50.75(b)(4)

N/A 3

Site-specific cost amount per 10 CFR 72.30(b)

$7,927 (a) 4 The amount of decommissioning trust funds accumulated as of December 31, 2022

$ 430,296 (b) 5 Schedule of the annual amounts remaining to be collected.

$0 6

Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (c) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

8 Financial assurance for decommissioning is provided by the prepayment method, coupled with an external trust fund, in accordance with 10 CFR 50.75(e)(1)(i) and 10 CFR 72.30(e)(1).

9 The trust fund agreements were amended effective February 1, 2022 to reflect the change in the name of company holding the trust as the result of Spin Transaction.

(a) The costs from the current detailed site-specific ISFSI decommissioning cost estimate have been escalated to December 31, 2022 dollars using published escalation indices. Attachment 30 provides information on the detailed decommissioning funding plan, detailed site-specific ISFSI decommissioning cost estimate, and the occurrence and the effect on the ISFSI decommissioning costs of the events listed in 10 CFR 72.30 (c)(1)-(4).

(b) The trust fund amount is the amount allocated for Radiological Decommissioning only. There are no past-due tax payments owed on the decommissioning trust fund activities as of December 31, 2022. Periodic payments of estimated income taxes are made by CEG during the year on a quarterly basis. CEG then obtains reimbursement from the trust funds. The reported trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2022.

(c) A 2% annual real rate of return is used as allowed by 10 CFR 50.75(e)(1)(i).

(d) For purposes of this report, permanent termination of operations (shutdown) is expected on October 17, 2046.

ATTACHMENT 3 Annual Radiological Decommissioning Funding Assurance Report for Braidwood Station, Unit 2

Page 1 of 1 ATTACHMENT 3 Annual Radiological Decommissioning Funding Assurance Report for Braidwood Station, Unit 2 (December 31, 2022 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c)

$580,438 2

Site-specific cost amount per 10 CFR 50.75(b)(4)

N/A 3

Site-specific cost amount per 10 CFR 72.30(b)

$7,927 (a) 4 The amount of decommissioning trust funds accumulated as of December 31, 2022

$463,854 (b) 5 Schedule of the annual amounts remaining to be collected.

$0 6

Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (c) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

8 Financial assurance for decommissioning is provided by the prepayment method, coupled with an external trust fund, in accordance with 10 CFR 50.75(e)(1)(i) and 10 CFR 72.30(e)(1).

9 The trust fund agreements were amended effective February 1, 2022 to reflect the change in the name of company holding the trust as the result of Spin Transaction.

(a) The costs from the current detailed site-specific ISFSI decommissioning cost estimate have been escalated to December 31, 2022 dollars using published escalation indices. Attachment 30 provides information on the detailed decommissioning funding plan, detailed site-specific ISFSI decommissioning cost estimate, and the occurrence and the effect on the ISFSI decommissioning costs of the events listed in 10 CFR 72.30 (c)(1)-(4).

(b) The trust fund amount is the amount allocated for Radiological Decommissioning only. There are no past-due tax payments owed on the decommissioning trust fund activities as of December 31, 2022. Periodic payments of estimated income taxes are made by CEG during the year on a quarterly basis. CEG then obtains reimbursement from the trust funds. The reported trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2022.

(c) A 2% annual real rate of return is used as allowed by 10 CFR 50.75(e)(1)(i).

(d) For purposes of this report, permanent termination of operations (shutdown) is expected on December 18, 2047.

ATTACHMENT 4 Annual Radiological Decommissioning Funding Assurance Report for Byron Station, Unit 1

Page 1 of 1 ATTACHMENT 4 Annual Radiological Decommissioning Funding Assurance Report for Byron Station, Unit 1 (December 31, 2022 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c)

$580,438 2

Site-specific cost amount per 10 CFR 50.75(b)(4)

N/A 3

Site-specific cost amount per 10 CFR 72.30(b)

$7,231 (a) 4 The amount of decommissioning trust funds accumulated as of December 31, 2022

$470,127 (b) 5 Schedule of the annual amounts remaining to be collected.

$0 6

Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (c) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

8 Financial assurance for decommissioning is provided by the prepayment method, coupled with an external trust fund, in accordance with 10 CFR 50.75(e)(1)(i) and 10 CFR 72.30(e)(1).

9 The trust fund agreements were amended effective February 1, 2022 to reflect the change in the name of company holding the trust as the result of Spin Transaction.

(a) The costs from the current detailed site-specific ISFSI decommissioning cost estimate have been escalated to December 31, 2022 dollars using published escalation indices. Attachment 30 provides information on the detailed decommissioning funding plan, detailed site-specific ISFSI decommissioning cost estimate, and the occurrence and the effect on the ISFSI decommissioning costs of the events listed in 10 CFR 72.30 (c)(1)-(4).

(b) The trust fund amount is the amount allocated for Radiological Decommissioning only. There are no past-due tax payments owed on the decommissioning trust fund activities as of December 31, 2022. Periodic payments of estimated income taxes are made by CEG during the year on a quarterly basis. CEG then obtains reimbursement from the trust funds. The reported trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2022.

(c) A 2% annual real rate of return is used as allowed by 10 CFR 50.75(e)(1)(i).

(d) For purposes of this report, permanent termination of operations (shutdown) is expected on October 31, 2044.

ATTACHMENT 5 Annual Radiological Decommissioning Funding Assurance Report for Byron Station, Unit 2

Page 1 of 1 ATTACHMENT 5 Annual Radiological Decommissioning Funding Assurance Report for Byron Station, Unit 2 (December 31, 2022 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c)

$580,438 2

Site-specific cost amount per 10 CFR 50.75(b)(4)

N/A 3

Site-specific cost amount per 10 CFR 72.30(b)

$7,231(a) 4 The amount of decommissioning trust funds accumulated as of December 31, 2022

$453,750 (b) 5 Schedule of the annual amounts remaining to be collected.

$0 6

Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (c) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

8 Financial assurance for decommissioning is provided by the prepayment method, coupled with an external trust fund, in accordance with 10 CFR 50.75(e)(1)(i) and 10 CFR 72.30(e)(1).

9 The trust fund agreements were amended effective February 1, 2022 to reflect the change in the name of company holding the trust as the result of Spin Transaction.

(a) The costs from the current detailed site-specific ISFSI decommissioning cost estimate have been escalated to December 31, 2022 dollars using published escalation indices. Attachment 30 provides information on the detailed decommissioning funding plan, detailed site-specific ISFSI decommissioning cost estimate, and the occurrence and the effect on the ISFSI decommissioning costs of the events listed in 10 CFR 72.30 (c)(1)-(4).

(b) The trust fund amount is the amount allocated for Radiological Decommissioning only. There are no past-due tax payments owed on the decommissioning trust fund activities as of December 31, 2022. Periodic payments of estimated income taxes are made by CEG during the year on a quarterly basis. CEG then obtains reimbursement from the trust funds. The reported trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2022.

(c) A 2% annual real rate of return is used as allowed by 10 CFR 50.75(e)(1)(i).

(d) For purposes of this report, permanent termination of operations (shutdown) is expected on November 6, 2046.

ATTACHMENT 6 Annual Radiological Decommissioning Funding Assurance Report for Calvert Cliffs Nuclear Power Plant, Unit 1

Page 1 of 1 ATTACHMENT 6 Annual Radiological Decommissioning Funding Assurance Report for Calvert Cliffs Nuclear Power Plant, Unit 1 (December 31, 2022 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c)

$538,029 2

Site-specific cost amount per 10 CFR 50.75(b)(4)

N/A 3

Site-specific cost amount per 10 CFR 72.30(b)

$6,968 (a) 4 The amount of decommissioning trust funds accumulated as of December 31, 2022

$479,206 (b) 5 Schedule of the annual amounts remaining to be collected.

$0 6

Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (c) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

8 Financial assurance for decommissioning is provided by the prepayment method, coupled with an external trust fund, in accordance with 10 CFR 50.75(e)(1)(i) and 10 CFR 72.30(e)(1).

9 The trust fund agreements were amended effective February 1, 2022 to reflect the change in the name of company holding the trust as the result of Spin Transaction.

(a) The costs from the current detailed site-specific ISFSI decommissioning cost estimate have been escalated to December 31, 2022 dollars using published escalation indices. Attachment 30 provides information on the detailed decommissioning funding plan, detailed site-specific ISFSI decommissioning cost estimate, and the occurrence and the effect on the ISFSI decommissioning costs of the events listed in 10 CFR 72.30 (c)(1)-(4).

(b) The trust fund amount is the amount allocated for Radiological Decommissioning only. There are no past-due tax payments owed on the decommissioning trust fund activities as of December 31, 2022. Periodic payments of estimated income taxes are made by CEG during the year on a quarterly basis. CEG then obtains reimbursement from the trust funds. The reported trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2022.

(c) A 2% annual real rate of return is used as allowed by 10 CFR 50.75(e)(1)(i).

(d) For purposes of this report, permanent termination of operations (shutdown) is expected on July 31, 2034.

ATTACHMENT 7 Annual Radiological Decommissioning Funding Assurance Report for Calvert Cliffs Nuclear Power Plant, Unit 2

Page 1 of 1 ATTACHMENT 7 Annual Radiological Decommissioning Funding Assurance Report for Calvert Cliffs Nuclear Power Plant, Unit 2 (December 31, 2022 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c)

$538,029 2

Site-specific cost amount per 10 CFR 50.75(b)(4)

N/A 3

Site-specific cost amount per 10 CFR 72.30(b)

$6,968 (a) 4 The amount of decommissioning trust funds accumulated as of December 31, 2022

$619,939 (b) 5 Schedule of the annual amounts remaining to be collected.

$0 6

Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (c) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

8 Financial assurance for decommissioning is provided by the prepayment method, coupled with an external trust fund, in accordance with 10 CFR 50.75(e)(1)(i) and 10 CFR 72.30(e)(1).

9 The trust fund agreements were amended effective February 1, 2022 to reflect the change in the name of company holding the trust as the result of Spin Transaction.

(a) The costs from the current detailed site-specific ISFSI decommissioning cost estimate have been escalated to December 31, 2022 dollars using published escalation indices. Attachment 30 provides information on the detailed decommissioning funding plan, detailed site-specific ISFSI decommissioning cost estimate, and the occurrence and the effect on the ISFSI decommissioning costs of the events listed in 10 CFR 72.30 (c)(1)-(4).

(b) The trust fund amount is the amount allocated for Radiological Decommissioning only. There are no past-due tax payments owed on the decommissioning trust fund activities as of December 31, 2022. Periodic payments of estimated income taxes are made by CEG during the year on a quarterly basis. CEG then obtains reimbursement from the trust funds. The reported trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2022.

(c) A 2% annual real rate of return is used as allowed by 10 CFR 50.75(e)(1)(i).

(d) For purposes of this report, permanent termination of operations (shutdown) is expected on August 13, 2036.

ATTACHMENT 8 Annual Radiological Decommissioning Funding Assurance Report for Clinton Power Station, Unit 1

Page 1 of 1 ATTACHMENT 8 Annual Radiological Decommissioning Funding Assurance Report for Clinton Power Station, Unit 1 (December 31, 2022 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c)

$705,897 2

Site-specific cost amount per 10 CFR 50.75(b)(4)

N/A 3

Site-specific cost amount per 10 CFR 72.30(b)

$10,868 (a) 4 The amount of decommissioning trust funds accumulated as of December 31, 2022

$634,478 (b) 5 Schedule of the annual amounts remaining to be collected.

$0 6

Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (c) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

8 Financial assurance for decommissioning is provided by the prepayment method, coupled with an external trust fund, in accordance with 10 CFR 50.75(e)(1)(i) and 10 CFR 72.30(e)(1).

9 The trust fund agreements were amended effective February 1, 2022 to reflect the change in the name of company holding the trust as the result of Spin Transaction.

(a) The costs from the current detailed site-specific ISFSI decommissioning cost estimate have been escalated to December 31, 2022 dollars using published escalation indices. Attachment 30 provides information on the detailed decommissioning funding plan, detailed site-specific ISFSI decommissioning cost estimate, and the occurrence and the effect on the ISFSI decommissioning costs of the events listed in 10 CFR 72.30 (c)(1)-(4).

(b) The trust fund amount is the amount allocated for Radiological Decommissioning only. There are no past-due tax payments owed on the decommissioning trust fund activities as of December 31, 2022. Periodic payments of estimated income taxes are made by CEG during the year on a quarterly basis. CEG then obtains reimbursement from the trust funds. The reported trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2022.

(c) A 2% annual real rate of return is used as allowed by 10 CFR 50.75(e)(1)(i).

(d) For purposes of this report, permanent termination of operations (shutdown) is expected on April 17, 2027.

ATTACHMENT 9 Annual Radiological Decommissioning Funding Assurance and Spent Fuel Management Report for Dresden Nuclear Power Station, Unit 1

Page 1 of 5 ATTACHMENT 9 Annual Radiological Decommissioning Funding Assurance and Spent Fuel Management Report for Dresden Nuclear Power Station, Unit 1 (December 31, 2022 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c)

N/A (a) 2 Site-specific cost amount per 10 CFR 50.75(b)(4) and 50.75(f)

$345,135 (a) 3 Site-specific cost amount per 10 CFR 72.30(b)

$3,893 (b) 4 The amount of decommissioning trust funds accumulated as of December 31, 2022

$418,875 (c) 5 Schedule of the annual amounts remaining to be collected

$0 6

Assumptions used regarding rates of escalation for decommissioning costs, earnings on funds, and other factors used in funding projections 2% (d) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v) 8 Financial assurance for decommissioning is provided by the prepayment method, coupled with an external trust fund, in accordance with 10 CFR 50.75(e)(1)(i) 9 The trust fund agreements were amended effective February 1, 2022 to reflect the change in the name of company holding the trust as the result of Spin Transaction.

10 2022 annual amount spent on decommissioning in accordance with 10 CFR 50.82(a)(8)(v)(A)

$1,374 (e) 11 Cumulative amount spent on decommissioning in accordance with 10 CFR 50.82(a)(8)(v)(A)

$133,579 (f)

Reimbursed from the decommissioning trust fund

$132,205 (f)

Not yet reimbursed from the decommissioning trust fund

$1,374 12 Amount of funds accumulated to cover the cost of managing irradiated fuel pursuant to 10 CFR 50.82(a)(8)(vii)(A) as of December 31, 2022

$42,492 (g) 13 Projected cost of managing irradiated fuel based on site-specific estimate per 10 CFR 50.82(a)(8)(vii)(B)

$34,613(a)

Page 2 of 5 ATTACHMENT 9 (Continued)

Annual Radiological Decommissioning Funding Assurance and Spent Fuel Management Report for Dresden Nuclear Power Station, Unit 1 (December 31, 2022 dollars, thousands)

(a) A formula cost amount using the formula in 10 CFR 50.75(c) is not applicable because Dresden, Unit 1, has been shutdown since October 31, 1978, and some decommissioning activities have already occurred on this unit. However, the amount to decommission Dresden, Unit 1, was calculated pursuant to 10 CFR 50.75(c) to be $600.3 million (as of December 31, 2022). Dresden, Unit 1, was a BWR reactor that operated at a maximum power level of 700 MWt (< 1200 MWt as specified in 10 CFR 50.75(c)). This amount assumes Dresden, Unit 1, was a BWR reactor type rated at a power capacity of 1200 MWt as required by the formula in 10 CFR 50.75(c). The calculation of this value assumes the labor, energy, and burial factors described in Attachment 1 and does not account for decommissioning activities that have occurred for Dresden, Unit 1.

In accordance with the regulatory requirements, the site-specific amount is reported per 10 CFR 50.75(b)(4), 50.75(f), 50.82(a)(8)(iii), and 50.82(a)(8)(v)(B) and assumes a DECON scenario as described in the site-specific cost estimate (SSCE) (DECOM-2020-EST-DRE1, Revision 2, "Decommissioning Cost Analysis Report Dresden Nuclear Power Station Unit 1"). The decommissioning cost estimate has been adjusted consistent with the description of planned decommissioning activities in the Dresden Nuclear Power Station, Unit 1, Post-Shutdown Decommissioning Activities Report (PSDAR), as most recently updated in a letter from Michael P. Gallagher to U.S. Nuclear Regulatory Commission dated March 19, 2018. The costs have been escalated from the 2020 dollars reflected in the 2020 decommissioning cost estimate to estimated costs as of December 31, 2022.

Decommissioning expenditures prior to the year the SSCE updates were prepared (historical expenditures) are not included in the estimated total cost of decommissioning in the final SSCE reports. Also, the amount reported does not include cash flows from the SSCE estimate for the 2020 through 2022 annual radiological costs because CEG considers the SSCE estimated costs for 2020 through 2022 decommissioning activities to be historical expenditures at the time the 2023 decommissioning funding assurance report is generated.

(b) The costs from the current detailed site-specific ISFSI decommissioning cost estimate have been escalated to December 31, 2022 dollars using published escalation indices. Attachment 30 provides information on the detailed decommissioning funding plan, detailed site-specific ISFSI decommissioning cost estimate, and the occurrence and the effect on the ISFSI decommissioning costs of the events listed in 10 CFR 72.30 (c)(1)-(4).

Page 3 of 5 ATTACHMENT 9 (Continued)

Annual Radiological Decommissioning Funding Assurance and Spent Fuel Management Report for Dresden Nuclear Power Station, Unit 1 (December 31, 2022 dollars, thousands)

(c) The trust fund amount is the amount allocated for radiological decommissioning only.

The allocation of funds for radiological decommissioning is based on the fraction of radiological decommissioning costs to radiological decommissioning costs plus spent fuel management costs identified in the DECON scenario as described in the site-specific cost estimate (SSCE) (DECOM-2020-EST-DRE1, Revision 2, "Decommissioning Cost Analysis Report Dresden Nuclear Power Station Unit 1").

This allocation is for purposes of demonstrating adequate decommissioning funding assurance only and is adjusted, as necessary, to provide adequate funding assurance for radiological decommissioning and spent fuel management. No spent fuel management costs are planned to be incurred until 2029.

There are no past-due tax payments owed on the decommissioning trust fund activities as of December 31, 2022. Periodic payments of estimated income taxes are made by CEG during the year on a quarterly basis. CEG then obtains reimbursement from the trust funds. The reported trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2022.

(d) A 2% annual real rate of return is used as allowed by 10 CFR 50.75(e)(1)(i).

(e) The amount spent on decommissioning in 2022 is consistent with the projected 2022 expense total of $2,952 (December 31, 2022 thousands of dollars) from the site-specific cost estimate. The delta of $1,578 can be attributed to lower dormancy costs in 2022 than projected in the site specific cost estimate.

The amount spent on decommissioning in 2022 represents the 2022 charges to the Dresden, Unit 1, project. Prior to reimbursement from the decommissioning trust fund, these charges will be validated to confirm they are legitimate decommissioning expenses. Consequently, the amount reimbursed may differ from the value provided.

(f) Not all historical data is available, and therefore, the cumulative amount spent on decommissioning and the amount reimbursed are estimates based on the best information obtainable at this time.

(g) The allocation of funds accumulated for managing irradiated fuel is based on the fraction of spent fuel management costs to radiological decommissioning costs plus spent fuel management costs identified in the DECON scenario as described in the site-specific cost estimate (SSCE) (DECOM-2020-EST-DRE1, Revision 2, "Decommissioning Cost Analysis Report Dresden Nuclear Power Station Unit 1").

This allocation is for purposes of demonstrating adequate decommissioning funding assurance only and is adjusted, as necessary, to provide adequate funding assurance for radiological decommissioning and spent fuel management. No spent fuel management costs are planned to be incurred until 2029.

Page 4 of 5 ATTACHMENT 9 (Continued)

Annual Radiological Decommissioning Funding Assurance and Spent Fuel Management Report for Dresden Nuclear Power Station, Unit 1 (December 31, 2022 dollars, thousands)

BOY BOY EOY Radiological Trust Trust Fund Trust Trust Decommissioning Fund Value Fund Fund Year Cost Value Less Cost Earnings Value 2023

$2,952

$418,875

$415,923

$8,318

$424,241 2024

$2,960

$424,241

$421,281

$8,426

$429,707 2025

$2,952

$429,707

$426,755

$8,535

$435,290 2026

$2,952

$435,290

$432,338

$8,647

$440,985 2027

$2,952

$440,985

$438,033

$8,761

$446,793 2028

$2,952

$446,793

$443,841

$8,877

$452,718 2029

$40,990

$452,718

$411,728

$8,235

$419,962 2030

$55,431

$419,962

$364,531

$7,291

$371,822 2031

$52,284

$371,822

$319,538

$6,391

$325,928 2032

$49,999

$325,928

$275,930

$5,519

$281,448 2033

$46,252

$281,448

$235,197

$4,704

$239,900 2034

$46,108

$239,900

$193,792

$3,876

$197,668 2035

$21,155

$197,668

$176,513

$3,530

$180,044 2036

$835

$180,044

$179,209

$3,584

$182,793 2037

$0

$182,793

$3,656

$186,449 2038

$0

$186,449

$3,729

$190,178 2039

$0

$190,178

$3,804

$193,981 2040

$0

$193,981

$3,880

$197,861 2041

$0

$197,861

$3,957

$201,818 2042

$0

$201,818

$4,036

$205,854 2043

$0

$205,854

$4,117

$209,971 2044

$0

$209,971

$4,199

$214,171 2045

$1,502

$214,171

$212,669

$4,253

$216,922 2046

$1,796

$216,922

$215,126

$4,303

$219,429 2047

$1,791

$219,429

$217,638

$4,353

$221,990 2048

$1,791

$221,990

$220,199

$4,404

$224,603 2049

$1,791

$224,603

$222,812

$4,456

$227,268 2050

$1,796

$227,268

$225,472

$4,509

$229,982 2051

$3,893

$229,982

$226,089

$4,522

$230,610 Total*

$345,135

Column may not add due to rounding

Page 5 of 5 ATTACHMENT 9 (Continued)

Annual Radiological Decommissioning Funding Assurance and Spent Fuel Management Report for Dresden Nuclear Power Station, Unit 1 (December 31, 2022 dollars, thousands)

BOY BOY EOY Irradiated Irradiated Fuel Irradiated Fuel Irradiated Fuel Irradiated Fuel Fuel Trust Fund Trust Fund Trust Fund Trust Fund Year Cost Value Less Cost Earnings Value 2023

$0

$42,492

$850

$43,342 2024

$0

$43,342

$867

$44,209 2025

$0

$44,209

$884

$45,093 2026

$0

$45,093

$902

$45,995 2027

$0

$45,995

$920

$46,914 2028

$0

$46,914

$938

$47,853 2029

$916

$47,853

$46,937

$939

$47,876 2030

$919

$47,876

$46,957

$939

$47,896 2031

$916

$47,896

$46,981

$940

$47,920 2032

$916

$47,920

$47,005

$940

$47,945 2033

$916

$47,945

$47,029

$941

$47,970 2034

$919

$47,970

$47,051

$941

$47,992 2035

$916

$47,992

$47,076

$942

$48,018 2036

$1,598

$48,018

$46,420

$928

$47,348 2037

$1,674

$47,348

$45,674

$913

$46,587 2038

$1,685

$46,587

$44,902

$898

$45,800 2039

$1,691

$45,800

$44,109

$882

$44,992 2040

$1,691

$44,992

$43,301

$866

$44,167 2041

$1,691

$44,167

$42,476

$850

$43,325 2042

$1,695

$43,325

$41,630

$833

$42,463 2043

$1,691

$42,463

$40,772

$815

$41,587 2044

$1,691

$41,587

$39,896

$798

$40,694 2045

$2,113

$40,694

$38,582

$772

$39,353 2046

$2,199

$39,353

$37,154

$743

$37,897 2047

$2,193

$37,897

$35,704

$714

$36,418 2048

$2,193

$36,418

$34,225

$684

$34,909 2049

$2,193

$34,909

$32,716

$654

$33,370 2050

$2,199

$33,370

$31,171

$623

$31,795 2051

$0

$31,795

$636

$32,431 Total*

$34,613

Column may not add due to rounding

ATTACHMENT 10 Annual Radiological Decommissioning Funding Assurance Report for Dresden Nuclear Power Station, Unit 2

Page 1 of 1 ATTACHMENT 10 Annual Radiological Decommissioning Funding Assurance Report for Dresden Nuclear Power Station, Unit 2 (December 31, 2022 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c)

$682,958 2

Site-specific cost amount per 10 CFR 50.75(b)(4)

N/A 3

Site-specific cost amount per 10 CFR 72.30(b)

$7,245 (a) 4 The amount of decommissioning trust funds accumulated as of December 31, 2022

$869,029 (b) 5 Schedule of the annual amounts remaining to be collected.

$0 6

Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (c) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

8 Financial assurance for decommissioning is provided by the prepayment method, coupled with an external trust fund, in accordance with 10 CFR 50.75(e)(1)(i) and 10 CFR 72.30(e)(1).

9 The trust fund agreements were amended effective February 1, 2022 to reflect the change in the name of company holding the trust as the result of Spin Transaction.

(a) The costs from the current detailed site-specific ISFSI decommissioning cost estimate have been escalated to December 31, 2022 dollars using published escalation indices. Attachment 30 provides information on the detailed decommissioning funding plan, detailed site-specific ISFSI decommissioning cost estimate, and the occurrence and the effect on the ISFSI decommissioning costs of the events listed in 10 CFR 72.30 (c)(1)-(4).

(b) The trust fund amount is the amount allocated for Radiological Decommissioning only. There are no past-due tax payments owed on the decommissioning trust fund activities as of December 31, 2022. Periodic payments of estimated income taxes are made by CEG during the year on a quarterly basis. CEG then obtains reimbursement from the trust funds. The reported trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2022.

(c) A 2% annual real rate of return is used as allowed by 10 CFR 50.75(e)(1)(i).

(d) For purposes of this report, permanent termination of operations (shutdown) is expected on December 22, 2029.

ATTACHMENT 11 Annual Radiological Decommissioning Funding Assurance Report for Dresden Nuclear Power Station, Unit 3

Page 1 of 1 ATTACHMENT 11 Annual Radiological Decommissioning Funding Assurance Report for Dresden Nuclear Power Station, Unit 3 (December 31, 2022 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c)

$682,958 2

Site-specific cost amount per 10 CFR 50.75(b)(4)

N/A 3

Site-specific cost amount per 10 CFR 72.30(b)

$7,245 (a) 4 The amount of decommissioning trust funds accumulated as of December 31, 2022

$891,049(b) 5 Schedule of the annual amounts remaining to be collected.

$0 6

Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (c) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

8 Financial assurance for decommissioning is provided by the prepayment method, coupled with an external trust fund, in accordance with 10 CFR 50.75(e)(1)(i) and 10 CFR 72.30(e)(1).

9 The trust fund agreements were amended effective February 1, 2022 to reflect the change in the name of company holding the trust as the result of Spin Transaction.

(a) The costs from the current detailed site-specific ISFSI decommissioning cost estimate have been escalated to December 31, 2022 dollars using published escalation indices. Attachment 30 provides information on the detailed decommissioning funding plan, detailed site-specific ISFSI decommissioning cost estimate, and the occurrence and the effect on the ISFSI decommissioning costs of the events listed in 10 CFR 72.30 (c)(1)-(4).

(b) The trust fund amount is the amount allocated for Radiological Decommissioning only. There are no past-due tax payments owed on the decommissioning trust fund activities as of December 31, 2022. Periodic payments of estimated income taxes are made by CEG during the year on a quarterly basis. CEG then obtains reimbursement from the trust funds. The reported trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2022.

(c) A 2% annual real rate of return is used as allowed by 10 CFR 50.75(e)(1)(i).

(d) For purposes of this report, permanent termination of operations (shutdown) is expected on January 12, 2031.

ATTACHMENT 12 Annual Radiological Decommissioning Funding Assurance Report for James A. FitzPatrick Nuclear Power Station

Page 1 of 1 ATTACHMENT 12 Annual Radiological Decommissioning Funding Assurance Report for James A. FitzPatrick Nuclear Power Station (December 31, 2022 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c)

$680,701 2

Site-specific cost amount per 10 CFR 50.75(b)(4)

N/A 3

Site-specific cost amount per 10 CFR 72.30(b)

$12,177 (a) 4 The amount of decommissioning trust funds accumulated as of December 31, 2022

$876,142 (b) 5 Schedule of the annual amounts remaining to be collected.

$0 6

Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (c) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

8 Financial assurance for decommissioning is provided by the prepayment method, coupled with an external trust fund, in accordance with 10 CFR 50.75(e)(1)(i) and 10 CFR 72.30(e)(1).

9 The trust fund agreements were amended effective February 1, 2022 to reflect the change in the name of company holding the trust as the result of Spin Transaction.

(a) The costs from the current detailed site-specific ISFSI decommissioning cost estimate have been escalated to December 31, 2022 dollars using published escalation indices. Attachment 30 provides information on the detailed decommissioning funding plan, detailed site-specific ISFSI decommissioning cost estimate, and the occurrence and the effect on the ISFSI decommissioning costs of the events listed in 10 CFR 72.30 (c)(1)-(4).

(b) The trust fund amount is the amount allocated for Radiological Decommissioning only. There are no past-due tax payments owed on the decommissioning trust fund activities as of December 31, 2022. Periodic payments of estimated income taxes are made by CEG during the year on a quarterly basis. CEG then obtains reimbursement from the trust funds. The reported trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2022.

(c) A 2% annual real rate of return is used as allowed by 10 CFR 50.75(e)(1)(i).

(d) For purposes of this report, permanent termination of operations (shutdown) is expected on October 17, 2034.

ATTACHMENT 13 Annual Radiological Decommissioning Funding Assurance Report for LaSalle County Station, Unit 1

Page 1 of 1 ATTACHMENT 13 Annual Radiological Decommissioning Funding Assurance Report for LaSalle County Station, Unit 1 (December 31, 2022 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c)

$705,897 2

Site-specific cost amount per 10 CFR 50.75(b)(4)

N/A 3

Site-specific cost amount per 10 CFR 72.30(b)

$9,224 (a) 4 The amount of decommissioning trust funds accumulated as of December 31, 2022

$637,702 (b) 5 Schedule of the annual amounts remaining to be collected.

$0 6

Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (c) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

8 Financial assurance for decommissioning is provided by the prepayment method, coupled with an external trust fund, in accordance with 10 CFR 50.75(e)(1)(i) and 10 CFR 72.30(e)(1).

9 The trust fund agreements were amended effective February 1, 2022 to reflect the change in the name of company holding the trust as the result of Spin Transaction.

(a) The costs from the current detailed site-specific ISFSI decommissioning cost estimate have been escalated to December 31, 2022 dollars using published escalation indices. Attachment 30 provides information on the detailed decommissioning funding plan, detailed site-specific ISFSI decommissioning cost estimate, and the occurrence and the effect on the ISFSI decommissioning costs of the events listed in 10 CFR 72.30 (c)(1)-(4).

(b) The trust fund amount is the amount allocated for Radiological Decommissioning only. There are no past-due tax payments owed on the decommissioning trust fund activities as of December 31, 2022. Periodic payments of estimated income taxes are made by CEG during the year on a quarterly basis. CEG then obtains reimbursement from the trust funds. The reported trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2022.

(c) A 2% annual real rate of return is used as allowed by 10 CFR 50.75(e)(1)(i).

(d) For purposes of this report, permanent termination of operations (shutdown) is expected on April 17, 2042.

ATTACHMENT 14 Annual Radiological Decommissioning Funding Assurance Report for LaSalle County Station, Unit 2

Page 1 of 1 ATTACHMENT 14 Annual Radiological Decommissioning Funding Assurance Report for LaSalle County Station, Unit 2 (December 31, 2022 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c)

$705,897 2

Site-specific cost amount per 10 CFR 50.75(b)(4)

N/A 3

Site-specific cost amount per 10 CFR 72.30(b)

$9,224 (a) 4 The amount of decommissioning trust funds accumulated as of December 31, 2022

$635,202 (b) 5 Schedule of the annual amounts remaining to be collected.

$0 6

Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (c) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

8 Financial assurance for decommissioning is provided by the prepayment method, coupled with an external trust fund, in accordance with 10 CFR 50.75(e)(1)(i) and 10 CFR 72.30(e)(1).

9 The trust fund agreements were amended effective February 1, 2022 to reflect the change in the name of company holding the trust as the result of Spin Transaction.

(a) The costs from the current detailed site-specific ISFSI decommissioning cost estimate have been escalated to December 31, 2022 dollars using published escalation indices. Attachment 30 provides information on the detailed decommissioning funding plan, detailed site-specific ISFSI decommissioning cost estimate, and the occurrence and the effect on the ISFSI decommissioning costs of the events listed in 10 CFR 72.30 (c)(1)-(4).

(b) The trust fund amount is the amount allocated for Radiological Decommissioning only. There are no past-due tax payments owed on the decommissioning trust fund activities as of December 31, 2022. Periodic payments of estimated income taxes are made by CEG during the year on a quarterly basis. CEG then obtains reimbursement from the trust funds. The reported trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2022.

(c) A 2% annual real rate of return is used as allowed by 10 CFR 50.75(e)(1)(i).

(d) For purposes of this report, permanent termination of operations (shutdown) is expected on December 16, 2043.

ATTACHMENT 15 Annual Radiological Decommissioning Funding Assurance Report for Limerick Generating Station, Unit 1

Page 1 of 2 ATTACHMENT 15 Annual Radiological Decommissioning Funding Assurance Report for Limerick Generating Station, Unit 1 (December 31, 2022 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c)

$724,584 2

Site-specific cost amount per 10 CFR 50.75(b)(4)

N/A 3

Site-specific cost amount per 10 CFR 72.30(b)

$8,166 (a) 4 The amount of decommissioning trust funds accumulated as of December 31, 2022

$555,435 (b) 5 Schedule of the annual amounts remaining to be collected.

$0 (c) 6 Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 3% (d) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

8 Financial assurance for decommissioning is provided by the external sinking fund method, coupled with an external trust fund, in accordance with 10 CFR 50.75(e)(1)(ii) and 10 CFR 72.30(e)(3).

9 The trust fund agreements were amended effective February 1, 2022 to reflect the change in the name of company holding the trust as the result of Spin Transaction.

(a) The costs from the current detailed site-specific ISFSI decommissioning cost estimate have been escalated to December 31, 2022 dollars using published escalation indices. Attachment 30 provides information on the detailed decommissioning funding plan, detailed site-specific ISFSI decommissioning cost estimate, and the occurrence and the effect on the ISFSI decommissioning costs of the events listed in 10 CFR 72.30 (c)(1)-(4).

(b) The trust fund amount is the amount allocated for Radiological Decommissioning only. There are no past-due tax payments owed on the decommissioning trust fund activities as of December 31, 2022. Periodic payments of estimated income taxes are made by CEG during the year on a quarterly basis. CEG then obtains reimbursement from the trust funds. The reported trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2022.

Page 2 of 2 ATTACHMENT 15 (continued)

Annual Radiological Decommissioning Funding Assurance Report for Limerick Generating Station, Unit 1 (December 31, 2022 dollars, thousands)

(c) The funding mechanism being used as the source of revenues for the external sinking funds is a non-bypassable charge approved by the Pennsylvania Public Utilities Commission (PaPUC) authorizing PECO Energy Company to continue to collect decommissioning funds for CEG. Any needed adjustments to the amount collected will be made in the next filing of the Nuclear Decommissioning Cost Adjustment (NDCA) to the PaPUC. This cost adjustment is made every five years pursuant to PaPUC Electric Tariff No. 4. The last adjustment was effective January 1, 2023, and allows for the collection of annual payments from ratepayers of

$0 through 2043.

(d) 10 CFR 50.75(e)(1)(ii) allows licensees to use a rate of return higher than 2% if the applicable rate-setting authority has specifically authorized a higher rate. The PaPUC approved a 3% real rate of return as part of the approval of the restructuring plan for PECO Energy Company (Letter from J. J. McNulty (PaPUC) to B. D. Crowe (PECO Energy Company), "Approval of Restructuring Plan for PECO Energy Company under Section 2806 of the Public Utility Code; Docket No. R-00973953," dated May 3, 2001). Accordingly, CEG uses a 3% real rate of return. The 3% is applicable through the decommissioning period as described in RAI #1 response provided in the Letter from Patrick R. Simpson (Exelon Generation Company, LLC) to U.S. NRC, "Response to Request for Additional Information Related to 2013 Report on Status of Decommissioning Funding for Reactors," dated August 15, 2013.

(e) For purposes of this report, permanent termination of operations (shutdown) is expected on October 26, 2044.

ATTACHMENT 16 Annual Radiological Decommissioning Funding Assurance Report for Limerick Generating Station, Unit 2

Page 1 of 2 ATTACHMENT 16 Annual Radiological Decommissioning Funding Assurance Report for Limerick Generating Station, Unit 2 (December 31, 2022 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c)

$724,584 2

Site-specific cost amount per 10 CFR 50.75(b)(4)

N/A 3

Site-specific cost amount per 10 CFR 72.30(b)

$8,166 (a) 4 The amount of decommissioning trust funds accumulated as of December 31, 2022

$592,050 (b) 5 Schedule of the annual amounts remaining to be collected.

$0 (c) 6 Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 3% (d) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

8 Financial assurance for decommissioning is provided by the external sinking fund method, coupled with an external trust fund, in accordance with 10 CFR 50.75(e)(1)(ii) and 10 CFR 72.30(e)(3).

9 The trust fund agreements were amended effective February 1, 2022 to reflect the change in the name of company holding the trust as the result of Spin Transaction.

(a) The costs from the current detailed site-specific ISFSI decommissioning cost estimate have been escalated to December 31, 2022 dollars using published escalation indices. Attachment 30 provides information on the detailed decommissioning funding plan, detailed site-specific ISFSI decommissioning cost estimate, and the occurrence and the effect on the ISFSI decommissioning costs of the events listed in 10 CFR 72.30 (c)(1)-(4).

(b) The trust fund amount is the amount allocated for Radiological Decommissioning only. There are no past-due tax payments owed on the decommissioning trust fund activities as of December 31, 2022. Periodic payments of estimated income taxes are made by CEG during the year on a quarterly basis. CEG then obtains reimbursement from the trust funds. The reported trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2022.

Page 2 of 2 ATTACHMENT 16 (continued)

Annual Radiological Decommissioning Funding Assurance Report for Limerick Generating Station, Unit 2 (December 31, 2022 dollars, thousands)

(c) The funding mechanism being used as the source of revenues for the external sinking funds is a non-bypassable charge approved by the Pennsylvania Public Utilities Commission (PaPUC) authorizing PECO Energy Company to continue to collect decommissioning funds for CEG. Any needed adjustments to the amount collected will be made in the next filing of the Nuclear Decommissioning Cost Adjustment (NDCA) to the PaPUC. This cost adjustment is made every five years pursuant to PaPUC Electric Tariff No. 4. The last adjustment was effective January 1, 2023, and allows for the collection of annual payments from ratepayers of

$0 through 2048.

(d) 10 CFR 50.75(e)(1)(ii) allows licensees to use a rate of return higher than 2% if the applicable rate-setting authority has specifically authorized a higher rate. The PaPUC approved a 3% real rate of return as part of the approval of the restructuring plan for PECO Energy Company (Letter from J. J. McNulty (PaPUC) to B. D. Crowe (PECO Energy Company), "Approval of Restructuring Plan for PECO Energy Company under Section 2806 of the Public Utility Code; Docket No. R-00973953," dated May 3, 2001). Accordingly, CEG uses a 3% real rate of return. The 3% is applicable through the decommissioning period as described in RAI #1 response provided in the Letter from Patrick R. Simpson (Exelon Generation Company, LLC) to U.S. NRC, "Response to Request for Additional Information Related to 2013 Report on Status of Decommissioning Funding for Reactors," dated August 15, 2013.

(e) For purposes of this report, permanent termination of operations (shutdown) is expected on June 22, 2049.

ATTACHMENT 17 Annual Radiological Decommissioning Funding Assurance Report for Nine Mile Point Nuclear Station, Unit 1

Page 1 of 1 ATTACHMENT 17 Annual Radiological Decommissioning Funding Assurance Report for Nine Mile Point Nuclear Station, Unit 1 (December 31, 2022 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c)

$647,563 2

Site-specific cost amount per 10 CFR 50.75(b)(4)

N/A 3

Site-specific cost amount per 10 CFR 72.30(b)

$7,731 (a) 4 The amount of decommissioning trust funds accumulated as of December 31, 2022

$770,145 (b) 5 Schedule of the annual amounts remaining to be collected.

$0 6

Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (c) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

8 Financial assurance for decommissioning is provided by the prepayment method, coupled with an external trust fund, in accordance with 10 CFR 50.75(e)(1)(i) and 10 CFR 72.30(e)(1).

9 The trust fund agreements were amended effective February 1, 2022 to reflect the change in the name of company holding the trust as the result of Spin Transaction.

(a) The costs from the current detailed site-specific ISFSI decommissioning cost estimate have been escalated to December 31, 2022 dollars using published escalation indices. Attachment 30 provides information on the detailed decommissioning funding plan, detailed site-specific ISFSI decommissioning cost estimate, and the occurrence and the effect on the ISFSI decommissioning costs of the events listed in 10 CFR 72.30 (c)(1)-(4).

(b) The trust fund amount is the amount allocated for Radiological Decommissioning only. There are no past-due tax payments owed on the decommissioning trust fund activities as of December 31, 2022. Periodic payments of estimated income taxes are made by CEG during the year on a quarterly basis. CEG then obtains reimbursement from the trust funds. The reported trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2022.

(c) A 2% annual real rate of return is used as allowed by 10 CFR 50.75(e)(1)(i).

(d) For purposes of this report, permanent termination of operations (shutdown) is expected on August 22, 2029.

ATTACHMENT 18 Annual Radiological Decommissioning Funding Assurance Report for Nine Mile Point Nuclear Station, Unit 2 CEG Portion

Page 1 of 1 ATTACHMENT 18 Annual Radiological Decommissioning Funding Assurance Report for Nine Mile Point Nuclear Station, Unit 2, CEG Portion (December 31, 2022 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c)

$594,159 (a) 2 Site-specific cost amount per 10 CFR 50.75(b)(4)

N/A 3

Site-specific cost amount per 10 CFR 72.30(b)

$6,339 (a)(b) 4 The amount of decommissioning trust funds accumulated as of December 31, 2022

$499,874 (c) 5 Schedule of the annual amounts remaining to be collected.

$0 6

Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (d) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

8 Financial assurance for decommissioning is provided by the prepayment method, coupled with an external trust fund, in accordance with 10 CFR 50.75(e)(1)(i) and 10 CFR 72.30(e)(1).

9 The trust fund agreements were amended effective February 1, 2022 to reflect the change in the name of company holding the trust as the result of Spin Transaction.

(a) Value is based on the Constellation Energy Generation, LLC (CEG) ownership share of Nine Mile Point Nuclear Station, Unit 2 of 82%.

(b) The costs from the current detailed site-specific ISFSI decommissioning cost estimate have been escalated to December 31, 2022 dollars using published escalation indices. Attachment 30 provides information on the detailed decommissioning funding plan, detailed site-specific ISFSI decommissioning cost estimate, and the occurrence and the effect on the ISFSI decommissioning costs of the events listed in 10 CFR 72.30 (c)(1)-(4).

(c) The trust fund amount is the amount allocated for Radiological Decommissioning only. There are no past-due tax payments owed on the decommissioning trust fund activities as of December 31, 2022. Periodic payments of estimated income taxes are made by CEG during the year on a quarterly basis. CEG then obtains reimbursement from the trust funds. The reported trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2022.

(d) A 2% annual real rate of return is used as allowed by 10 CFR 50.75(e)(1)(i).

(e) For purposes of this report, permanent termination of operations (shutdown) is expected on October 31, 2046.

ATTACHMENT 19 Annual Radiological Decommissioning Funding Assurance Report for Nine Mile Point Nuclear Station, Unit 2 LIPA Portion

Page 1 of 1 ATTACHMENT 19 Annual Radiological Decommissioning Funding Assurance Report for Nine Mile Point Nuclear Station, Unit 2, LIPA Portion (December 31, 2022 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c)

$130,425 (a) 2 Site-specific cost amount per 10 CFR 50.75(b)(4)

N/A 3

Site-specific cost amount per 10 CFR 72.30(b)

$1,392 (a)(b) 4 The amount of decommissioning trust funds accumulated as of December 31, 2022

$123,214 (c) 5 Schedule of the annual amounts remaining to be collected.

$0 6

Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (d) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

8 Financial assurance for decommissioning is provided by the prepayment method, coupled with an external trust fund, in accordance with 10 CFR 50.75(e)(1)(i) and 10 CFR 72.30(e)(1).

9 There are no material changes to the trust fund agreements.

(a) Value is based on the Long Island Power Authority (LIPA) ownership share of Nine Mile Point Nuclear Station, Unit 2 of 18%.

(b) The costs from the current detailed site-specific ISFSI decommissioning cost estimate have been escalated to December 31, 2022 dollars using published escalation indices. Attachment 30 provides information on the detailed decommissioning funding plan, detailed site-specific ISFSI decommissioning cost estimate, and the occurrence and the effect on the ISFSI decommissioning costs of the events listed in 10 CFR 72.30 (c)(1)-(4).

(c) The total trust fund amount is $155,368 with a portion allocated to contaminated (radiological) decommissioning and a portion allocated to non-contaminated decommissioning. The amount allocated to contaminated decommissioning is $123,214. These amounts were provided by the Nine Mile Point Nuclear Station, Unit 2 co-owner LIPA. LIPA has no past-due tax payments related to decommissioning trust fund activities as of December 31, 2022. The trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2022. CEG has not independently verified or assessed the trust fund amount.

(d) A 2% annual real rate of return is used as allowed by 10 CFR 50.75(e)(1)(i).

(e) For purposes of this report, permanent termination of operations (shutdown) is expected on October 31, 2046.

ATTACHMENT 20 Annual Radiological Decommissioning Funding Assurance Report for Peach Bottom Atomic Power Station, Unit 1

Page 1 of 4 ATTACHMENT 20 Annual Radiological Decommissioning Funding Assurance Report for Peach Bottom Atomic Power Station, Unit 1 (December 31, 2022 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c)

N/A (a) 2 Site-specific cost amount per 10 CFR 50.75(b)(4) and 50.75(f)

$275,417 (a) 3 Site-specific cost amount per 10 CFR 72.30(b)

N/A (g) 4 The amount of decommissioning trust funds accumulated as of December 31, 2022

$145,438 (b) 5 Schedule of the annual amounts remaining to be collected.

$4,213 (c) 6 Assumptions used regarding rates of escalation for decommissioning costs, earnings on funds, and other factors used in funding projections 3% (d) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

8 Financial assurance for decommissioning is provided by the external sinking fund method, coupled with an external trust fund, in accordance with 10 CFR 50.75(e)(1)(ii).

9 The trust fund agreements were amended effective February 1, 2022 to reflect the change in the name of company holding the trust as the result of Spin Transaction.

10 2022 annual amount spent on decommissioning in accordance with 10 CFR 50.82(a)(8)(v)(A).

$914 (e) 11 Cumulative amount spent on decommissioning in accordance with 10 CFR 50.82(a)(8)(v)(A).

$16,334 (f)

Reimbursed from the decommissioning trust fund

$13,590 (f)

Not yet reimbursed from the decommissioning trust fund

$2,744 12 Amount of funds accumulated to cover the cost of managing irradiated fuel pursuant to 10 CFR 50.82(a)(8)(vii)(A) as of December 31, 2021.

N/A (g) 13 Projected cost of managing irradiated fuel based on site-specific estimate per 10 CFR 50.82(a)(8)(vii)(B).

N/A (g)

Page 2 of 4 ATTACHMENT 20 (Continued)

Annual Radiological Decommissioning Funding Assurance Report for Peach Bottom Atomic Power Station, Unit 1 (December 31, 2022 dollars, thousands)

(a) A formula cost amount using the formula in 10 CFR 50.75(c) is not applicable because Peach Bottom, Unit 1, has been shutdown since October 31, 1974, and some decommissioning activities have already occurred on this unit. Furthermore, Peach Bottom, Unit 1, was a High Temperature Gas Cooled Reactor (HTGR), which does not translate to a BWR or PWR as specified in the formula for calculating the formula cost amount, and hence a formula cost amount per 10 CFR 50.75(c) cannot be calculated for Peach Bottom, Unit 1.

In accordance with the regulatory requirements, the site-specific amount is reported per 10 CFR 50.75(b)(4), 50.75(f), 50.82(a)(8)(iii), and 50.82(a)(8)(v)(B) and assumes a DECON scenario as described in the site-specific cost estimate (SSCE) (DECOM-2020-DCE-PEA1, Revision 0-2034-LT, "Decommissioning Cost Analysis for the Peach Bottom Atomic Power Station Unit 1"). The decommissioning cost estimate has been adjusted consistent with the description of planned decommissioning activities in the Peach Bottom, Unit 1, Decommissioning Plan. The costs have been escalated from the mid-year 2020 dollars reflected in the SSCE to estimated costs as of December 31, 2022.

Decommissioning expenditures prior to the year the SSCE updates were prepared (historical expenditures) are not included in the estimated total cost of decommissioning in the final SSCE reports. Also, the amount reported does not include cash flows from the SSCE for the annual radiological decommissioning costs for 2020 through 2022. CEG considers the SSCE estimated costs for 2020 through 2022 decommissioning activities to be historical expenditures at the time the 2023 decommissioning funding assurance report is generated.

Decontamination and dismantlement of Peach Bottom, Unit 1, will conclude by 10/31/2034 in compliance with 10 CFR 50.82(a)(3).

(b) The trust fund amount is the amount allocated for Radiological Decommissioning only. There are no past-due tax payments related to decommissioning trust fund activities as of December 31, 2022. Periodic payments of estimated income taxes are made by CEG during the year on a quarterly basis. CEG then obtains reimbursement from the trust funds. The reported trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2022.

(c) The funding mechanism being used as the source of revenues for the external sinking funds is a non-bypassable charge approved by the Pennsylvania Public Utilities Commission (PaPUC) authorizing PECO Energy Company to continue to collect decommissioning funds for CEG. Adjustments to the amount collection was made in the March 31, 2022 filing of the Nuclear Decommissioning Cost Adjustment (NDCA) to the PaPUC. This cost adjustment is made every five years pursuant to PaPUC Electric Tariff No. 4. The last adjustment was effective January 1, 2023, and allows for the collection of annual payments from ratepayers of $4,213K through 2032.

Page 3 of 4 ATTACHMENT 20 (Continued)

Annual Radiological Decommissioning Funding Assurance Report for Peach Bottom Atomic Power Station, Unit 1 (December 31, 2022 dollars, thousands)

(d) 10 CFR 50.75(e)(1)(ii) allows licensees to use a rate of return higher than 2% if the applicable rate-setting authority has specifically authorized a higher rate. The PaPUC approved a 3% real rate of return as part of the approval of the restructuring plan for PECO Energy Company (Letter from J. J. McNulty (PaPUC) to B. D. Crowe (PECO Energy Company), "Approval of Restructuring Plan for PECO Energy Company under Section 2806 of the Public Utility Code; Docket No. R-00973953,"

dated May 3, 2001). Accordingly, CEG uses a 3% real rate of return. The 3% is applicable through the decommissioning period as described in RAI #1 response provided in the Letter from Patrick R. Simpson (Exelon Generation Company, LLC) to U.S. Nuclear Regulatory Commission, "Response to Request for Additional Information Related to 2013 Report on Status of Decommissioning Funding for Reactors," dated August 15, 2013.

(e) The amount spent on decommissioning in 2022 is consistent with the projected 2022 expense of $1,159 (December 31, 2022 thousands of dollars) from the site-specific cost estimate. The delta of $245 (thousands of dollars) can be attributed to decommissioning work performed in 2022 that was planned to occur later in the site specific cost estimate. This work included asbestos abatement and hazardous waste removal.

The amount spent on decommissioning in 2022 represents the 2022 charges to the Peach Bottom, Unit 1, project. Prior to reimbursement from the decommissioning trust fund, these charges will be validated to confirm they are legitimate decommissioning expenses. Consequently, the amount reimbursed may differ from the value provided.

(f) Not all historical data is available, and therefore, the cumulative amount spent on decommissioning and the amount reimbursed are estimates based on the best information obtainable at this time.

(g) Peach Bottom, Unit 1, was shut down in October of 1974, with defueling of the core completed by the following June. Starting in 1975, the spent fuel was shipped by truck to Idaho. The final of 44 shipments was completed in February of 1977.

Consequently, no irradiated fuel for Peach Bottom, Unit 1, remains on-site; therefore, 10 CFR 50.82(a)(8)(vii) and 10 CFR 72.30(b) do not apply.

Page 4 of 4 ATTACHMENT 20 (Continued)

Annual Radiological Decommissioning Funding Assurance Report for Peach Bottom Atomic Power Station, Unit 1 (December 31, 2022 dollars, thousands)

BOY BOY EOY Radiological Trust Trust Fund First Trust Second Trust Decommissioning Fund Value Half Fund Half Fund Year Cost Value Less Cost**

Contributions Earnings Contributions Value 2023

$1,159

$145,438

$144,279

$2,107

$4,392

$2,107

$152,884 2024

$1,162

$152,884

$151,722

$2,107

$4,615

$2,107

$160,549 2025

$1,159

$160,549

$159,391

$2,107

$4,845

$2,107

$168,449 2026

$1,159

$168,449

$167,290

$2,107

$5,082

$2,107

$176,585 2027

$1,159

$176,585

$175,426

$2,107

$5,326

$2,107

$184,965 2028

$7,881

$184,965

$177,084

$2,107

$5,376

$2,107

$186,672 2029

$30,846

$186,672

$155,827

$2,107

$4,738

$2,107

$164,778 2030

$50,613

$164,778

$114,165

$2,107

$3,488

$2,107

$121,866 2031

$50,613

$121,866

$71,253

$2,107

$2,201

$2,107

$77,667 2032

$58,888

$77,667

$18,779

$2,107

$627

$2,107

$23,619 2033

$66,749

$23,619

($43,130)

$0

($43,130) 2034

$4,031

($43,130)

($47,161)

$0

($47,161)

Total*

$275,417

Columns may not add due to rounding

- Annual contributions added to individual years - Earnings of half of contributions are included in current year to estimate payment of contributions throughout the year

ATTACHMENT 21 Annual Radiological Decommissioning Funding Assurance Report for Peach Bottom Atomic Power Station, Unit 2

Page 1 of 2 ATTACHMENT 21 Annual Radiological Decommissioning Funding Assurance Report for Peach Bottom Atomic Power Station, Unit 2 (December 31, 2022 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c)

$362,292 (a) 2 Site-specific cost amount per 10 CFR 50.75(b)(4)

N/A 3

Site-specific cost amount per 10 CFR 72.30(b)

$3,402 (a)(b) 4 The amount of decommissioning trust funds accumulated as of December 31, 2022

$338,190 (c) 5 Schedule of the annual amounts remaining to be collected.

$0 (d) 6 Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 3% (e) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

8 Financial assurance for decommissioning is provided by the external sinking fund method, coupled with an external trust fund, in accordance with 10 CFR 50.75(e)(1)(ii) and 10 CFR 72.30(e)(3).

9 The trust fund agreements were amended effective February 1, 2022 to reflect the change in the name of company holding the trust as the result of Spin Transaction.

(a) Value is based on the Constell Energy Generation, LLC (CEG) ownership share of Peach Bottom Atomic Power Station, Unit 2 of 50%.

(b) The costs from the current detailed site-specific ISFSI decommissioning cost estimate have been escalated to December 31, 2022 dollars using published escalation indices. Attachment 30 provides information on the detailed decommissioning funding plan, detailed site-specific ISFSI decommissioning cost estimate, and the occurrence and the effect on the ISFSI decommissioning costs of the events listed in 10 CFR 72.30 (c)(1)-(4).

(c) The trust fund amount is the amount allocated for Radiological Decommissioning only. There are no past-due tax payments owed on the decommissioning trust fund activities as of December 31, 2022. Periodic payments of estimated income taxes are made by CEG during the year on a quarterly basis. CEG then obtains reimbursement from the trust funds. The reported trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2022.

Page 2 of 2 ATTACHMENT 21 (continued)

Annual Radiological Decommissioning Funding Assurance Report for Peach Bottom Atomic Power Station, Unit 2 (December 31, 2022 dollars, thousands)

(d) The funding mechanism being used as the source of revenues for the external sinking funds is a non-bypassable charge approved by the Pennsylvania Public Utilities Commission (PaPUC) authorizing PECO Energy Company to continue to collect decommissioning funds for CEG. Any needed adjustments to the amount collected will be made in the next filing of the Nuclear Decommissioning Cost Adjustment (NDCA) to the PaPUC. This cost adjustment is made every five years pursuant to PaPUC Electric Tariff No. 4. The last adjustment was effective January 1, 2023, and allows for the collection of annual payments from ratepayers of

$0 through 2032.

(e) 10 CFR 50.75(e)(1)(ii) allows licensees to use a rate of return higher than 2% if the applicable rate-setting authority has specifically authorized a higher rate. The PaPUC approved a 3% real rate of return as part of the approval of the restructuring plan for PECO Energy Company (Letter from J. J. McNulty (PaPUC) to B. D. Crowe (PECO Energy Company), "Approval of Restructuring Plan for PECO Energy Company under Section 2806 of the Public Utility Code; Docket No. R-00973953,"

dated May 3, 2001). Accordingly, CEG uses a 3% real rate of return. The 3% is applicable through the decommissioning period as described in RAI #1 response provided in the Letter from Patrick R. Simpson (Exelon Generation Company, LLC) to U.S. NRC, "Response to Request for Additional Information Related to 2013 Report on Status of Decommissioning Funding for Reactors," dated August 15, 2013.

(f) For purposes of this report, permanent termination of operations (shutdown) is expected on August 8, 2033.

ATTACHMENT 22 Annual Radiological Decommissioning Funding Assurance Report for Peach Bottom Atomic Power Station, Unit 3

Page 1 of 2 ATTACHMENT 22 Annual Radiological Decommissioning Funding Assurance Report for Peach Bottom Atomic Power Station, Unit 3 (December 31, 2022 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c)

$362,292 (a) 2 Site-specific cost amount per 10 CFR 50.75(b)(4)

N/A 3

Site-specific cost amount per 10 CFR 72.30(b)

$3,402 (a)(b) 4 The amount of decommissioning trust funds accumulated as of December 31, 2022

$366,389 (c) 5 Schedule of the annual amounts remaining to be collected.

$0 (d) 6 Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 3% (e) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

8 Financial assurance for decommissioning is provided by the external sinking fund method, coupled with an external trust fund, in accordance with 10 CFR 50.75(e)(1)(ii) and 10 CFR 72.30(e)(3).

9 The trust fund agreements were amended effective February 1, 2022 to reflect the change in the name of company holding the trust as the result of Spin Transaction.

(a) Value is based on the Constellation Energy Generation, LLC (CEG) ownership share of Peach Bottom Atomic Power Station, Unit 3 of 50%.

(b) The costs from the current detailed site-specific ISFSI decommissioning cost estimate have been escalated to December 31, 2022 dollars using published escalation indices. Attachment 30 provides information on the detailed decommissioning funding plan, detailed site-specific ISFSI decommissioning cost estimate, and the occurrence and the effect on the ISFSI decommissioning costs of the events listed in 10 CFR 72.30 (c)(1)-(4).

(c) The trust fund amount is the amount allocated for Radiological Decommissioning only. There are no past-due tax payments owed on the decommissioning trust fund activities as of December 31, 2022. Periodic payments of estimated income taxes are made by CEG during the year on a quarterly basis. CEG then obtains reimbursement from the trust funds. The reported trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2022.

(d) The funding mechanism being used as the source of revenues for the external sinking funds is a non-bypassable charge approved by the Pennsylvania Public Utilities Commission (PaPUC) authorizing PECO Energy Company to continue to collect decommissioning funds for CEG. Any needed adjustments to the amount collected will be made in the next filing of the Nuclear Decommissioning Cost Adjustment (NDCA) to the PaPUC. This cost adjustment is made every five years pursuant to PaPUC Electric Tariff No. 4. The last adjustment was effective January 1, 2023, and allows for the collection of annual payments from ratepayers of

$0 through 2033.

Page 2 of 2 ATTACHMENT 22 (continued)

Annual Radiological Decommissioning Funding Assurance Report for Peach Bottom Atomic Power Station, Unit 3 (December 31, 2022 dollars, thousands)

(e) 10 CFR 50.75(e)(1)(ii) allows licensees to use a rate of return higher than 2% if the applicable rate-setting authority has specifically authorized a higher rate. The PaPUC approved a 3% real rate of return as part of the approval of the restructuring plan for PECO Energy Company (Letter from J. J. McNulty (PaPUC) to B. D. Crowe (PECO Energy Company), "Approval of Restructuring Plan for PECO Energy Company under Section 2806 of the Public Utility Code; Docket No. R-00973953,"

dated May 3, 2001). Accordingly, CEG uses a 3% real rate of return. The 3% is applicable through the decommissioning period as described in RAI #1 response provided in the Letter from Patrick R. Simpson (Exelon Generation Company, LLC) to U.S. NRC, "Response to Request for Additional Information Related to 2013 Report on Status of Decommissioning Funding for Reactors," dated August 15, 2013.

(f) For purposes of this report, permanent termination of operations (shutdown) is expected on July 2, 2034.

ATTACHMENT 23 Annual Radiological Decommissioning Funding Assurance Report for Quad Cities Nuclear Power Station, Unit 1

Page 1 of 1 ATTACHMENT 23 Annual Radiological Decommissioning Funding Assurance Report for Quad Cities Nuclear Power Station, Unit 1 (December 31, 2022 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c)

$512,218 (a) 2 Site-specific cost amount per 10 CFR 50.75(b)(4)

N/A 3

Site-specific cost amount per 10 CFR 72.30(b)

$6,368 (a)(b) 4 The amount of decommissioning trust funds accumulated as of December 31, 2022

$549,113 (c) 5 Schedule of the annual amounts remaining to be collected.

$0 6

Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (d) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

8 Financial assurance for decommissioning is provided by the prepayment method, coupled with an external trust fund, in accordance with 10 CFR 50.75(e)(1)(i) and 10 CFR 72.30(e)(1).

9 The trust fund agreements were amended effective February 1, 2022 to reflect the change in the name of company holding the trust as the result of Spin Transaction.

(a) Value is based on the Constellation Energy Generation, LLC (CEG) ownership share of Quad Cities Nuclear Power Station, Unit 1 of 75%.

(b) The costs from the current detailed site-specific ISFSI decommissioning cost estimate have been escalated to December 31, 2022 dollars using published escalation indices. Attachment 30 provides information on the detailed decommissioning funding plan, detailed site-specific ISFSI decommissioning cost estimate, and the occurrence and the effect on the ISFSI decommissioning costs of the events listed in 10 CFR 72.30 (c)(1)-(4).

(c) The trust fund amount is the amount allocated for Radiological Decommissioning only. There are no past-due tax payments owed on the decommissioning trust fund activities as of December 31, 2022. Periodic payments of estimated income taxes are made by CEG during the year on a quarterly basis. CEG then obtains reimbursement from the trust funds. The reported trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2022.

(d) A 2% annual real rate of return is used as allowed by 10 CFR 50.75(e)(1)(i).

(e) For purposes of this report, permanent termination of operations (shutdown) is expected on December 14, 2032.

ATTACHMENT 24 Annual Radiological Decommissioning Funding Assurance Report for Quad Cities Nuclear Power Station, Unit 2

Page 1 of 1 ATTACHMENT 24 Annual Radiological Decommissioning Funding Assurance Report for Quad Cities Nuclear Power Station, Unit 2 (December 31, 2022 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c)

$512,218(a) 2 Site-specific cost amount per 10 CFR 50.75(b)(4)

N/A 3

Site-specific cost amount per 10 CFR 72.30(b)

$6,368 (a)(b) 4 The amount of decommissioning trust funds accumulated as of December 31, 2020

$618,126 (c) 5 Schedule of the annual amounts remaining to be collected.

$0 6

Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (d) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

8 Financial assurance for decommissioning is provided by the prepayment method, coupled with an external trust fund, in accordance with 10 CFR 50.75(e)(1)(i) and 10 CFR 72.30(e)(1).

9 The trust fund agreements were amended effective February 1, 2022 to reflect the change in the name of company holding the trust as the result of Spin Transaction.

(a) Value is based on the Constellation Energy Generation, LLC (CEG) ownership share of Quad Cities Nuclear Power Station, Unit 2 of 75%.

(b) The costs from the current detailed site-specific ISFSI decommissioning cost estimate have been escalated to December 31, 2022 dollars using published escalation indices. Attachment 30 provides information on the detailed decommissioning funding plan, detailed site-specific ISFSI decommissioning cost estimate, and the occurrence and the effect on the ISFSI decommissioning costs of the events listed in 10 CFR 72.30 (c)(1)-(4).

(c) The trust fund amount is the amount allocated for Radiological Decommissioning only. There are no past-due tax payments owed on the decommissioning trust fund activities as of December 31, 2022. Periodic payments of estimated income taxes are made by CEG during the year on a quarterly basis. CEG then obtains reimbursement from the trust funds. The reported trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2022.

(d) A 2% annual real rate of return is used as allowed by 10 CFR 50.75(e)(1)(i).

(e) For purposes of this report, permanent termination of operations (shutdown) is expected on December 14, 2032.

ATTACHMENT 25 Annual Radiological Decommissioning Funding Assurance Report for R.E. Ginna Nuclear Power Plant

Page 1 of 1 ATTACHMENT 25 Annual Radiological Decommissioning Funding Assurance Report for R.E. Ginna Nuclear Power Plant (December 31, 2022 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c)

$513,489 2

Site-specific cost amount per 10 CFR 50.75(b)(4)

N/A 3

Site-specific cost amount per 10 CFR 72.30(b)

$8,583 (a) 4 The amount of decommissioning trust funds accumulated as of December 31, 2020

$573,644 (b) 5 Schedule of the annual amounts remaining to be collected.

$0 6

Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (c) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

8 Financial assurance for decommissioning is provided by the prepayment method, coupled with an external trust fund, in accordance with 10 CFR 50.75(e)(1)(i) and 10 CFR 72.30(e)(1).

9 The trust fund agreements were amended effective February 1, 2022 to reflect the change in the name of company holding the trust as the result of Spin Transaction.

(a) The costs from the current detailed site-specific ISFSI decommissioning cost estimate have been escalated to December 31, 2022 dollars using published escalation indices. Attachment 30 provides information on the detailed decommissioning funding plan, detailed site-specific ISFSI decommissioning cost estimate, and the occurrence and the effect on the ISFSI decommissioning costs of the events listed in 10 CFR 72.30 (c)(1)-(4).

(b) The trust fund amount is the amount allocated for Radiological Decommissioning only. There are no past-due tax payments owed on the decommissioning trust fund activities as of December 31, 2022. Periodic payments of estimated income taxes are made by CEG during the year on a quarterly basis. CEG then obtains reimbursement from the trust funds. The reported trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2022.

(c) A 2% annual real rate of return is used as allowed by 10 CFR 50.75(e)(1)(i).

(d) For purposes of this report, permanent termination of operations (shutdown) is expected on September 18, 2029.

ATTACHMENT 26 Annual Radiological Decommissioning Funding Assurance Report for Salem Generating Station, Unit 1

Page 1 of 2 ATTACHMENT 26 Annual Radiological Decommissioning Funding Assurance Report for Salem Generating Station, Unit 1 (December 31, 2022 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c)

$256,901 (a) 2 Site-specific cost amount per 10 CFR 50.75(b)(4)

N/A 3

Site-specific cost amount per 10 CFR 72.30(b)

$1,979 (a)(b) 4 The amount of decommissioning trust funds accumulated as of December 31, 2020

$312,235 (c) 5 Schedule of the annual amounts remaining to be collected.

$0 (d) 6 Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 3% (e) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

8 Financial assurance for decommissioning is provided by the external sinking fund method, coupled with an external trust fund, in accordance with 10 CFR 50.75(e)(1)(ii) and 10 CFR 72.30(e)(3).

9 The trust fund agreements were amended effective February 1, 2022 to reflect the change in the name of company holding the trust as the result of Spin Transaction.

(a) Value is based on the Constellation Energy Generation, LLC (CEG) ownership share of Salem Generating Station, Unit 1 of 42.59%.

(b) The costs from the current detailed site-specific ISFSI decommissioning cost estimate have been escalated to December 31, 2022 dollars using published escalation indices. Attachment 30 provides information on the detailed decommissioning funding plan, detailed site-specific ISFSI decommissioning cost estimate, and the occurrence and the effect on the ISFSI decommissioning costs of the events listed in 10 CFR 72.30 (c)(1)-(4).

(c) The trust fund amount is the amount allocated for Radiological Decommissioning only. There are no past-due tax payments owed on the decommissioning trust fund activities as of December 31, 2022. Periodic payments of estimated income taxes are made by CEG during the year on a quarterly basis. CEG then obtains reimbursement from the trust funds. The reported trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2022.

(d) The funding mechanism being used as the source of revenues for the external sinking funds is a non-bypassable charge approved by the Pennsylvania Public Utilities Commission (PaPUC) authorizing PECO Energy Company to continue to collect decommissioning funds for CEG. Any needed adjustments to the amount collected will be made in the next filing of the Nuclear Decommissioning Cost Adjustment (NDCA) to the PaPUC. This cost adjustment is made every five years pursuant to PaPUC Electric Tariff No. 4. The last adjustment was effective January 1, 2023, and allows for the collection of annual payments from ratepayers of

$0 through 2035.

Page 2 of 2 ATTACHMENT 26 (continued)

Annual Radiological Decommissioning Funding Assurance Report for Salem Generating Station, Unit 1 (December 31, 2022 dollars, thousands)

(e) 10 CFR 50.75(e)(1)(ii) allows licensees to use a rate of return higher than 2% if the applicable rate-setting authority has specifically authorized a higher rate. The PaPUC approved a 3% real rate of return as part of the approval of the restructuring plan for PECO Energy Company (Letter from J. J. McNulty (PaPUC) to B. D. Crowe (PECO Energy Company), "Approval of Restructuring Plan for PECO Energy Company under Section 2806 of the Public Utility Code; Docket No. R-00973953,"

dated May 3, 2001). Accordingly, CEG uses a 3% real rate of return. The 3% is applicable through the decommissioning period as described in RAI #1 response provided in the Letter from Patrick R. Simpson (Exelon Generation Company, LLC) to U.S. NRC, "Response to Request for Additional Information Related to 2013 Report on Status of Decommissioning Funding for Reactors," dated August 15, 2013.

(f) For purposes of this report, permanent termination of operations (shutdown) is expected on August 13, 2036.

ATTACHMENT 27 Annual Radiological Decommissioning Funding Assurance Report for Salem Generating Station, Unit 2

Page 1 of 2 ATTACHMENT 27 Annual Radiological Decommissioning Funding Assurance Report for Salem Generating Station, Unit 2 (December 31, 2022 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c)

$256,901 (a) 2 Site-specific cost amount per 10 CFR 50.75(b)(4)

N/A 3

Site-specific cost amount per 10 CFR 72.30(b)

$1,979 (a)(b) 4 The amount of decommissioning trust funds accumulated as of December 31, 2020

$259,098 (c) 5 Schedule of the annual amounts remaining to be collected.

$0 (d) 6 Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 3% (e) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

8 Financial assurance for decommissioning is provided by the external sinking fund method, coupled with an external trust fund, in accordance with 10 CFR 50.75(e)(1)(ii) and 10 CFR 72.30(e)(3).

9 The trust fund agreements were amended effective February 1, 2022 to reflect the change in the name of company holding the trust as the result of Spin Transaction.

(a) All values are based on the Constellation Energy Generation, LLC (CEG) ownership share of Salem Generating Station, Unit 2 of 42.59%.

(b) The costs from the current detailed site-specific ISFSI decommissioning cost estimate have been escalated to December 31, 2022 dollars using published escalation indices. Attachment 30 provides information on the detailed decommissioning funding plan, detailed site-specific ISFSI decommissioning cost estimate, and the occurrence and the effect on the ISFSI decommissioning costs of the events listed in 10 CFR 72.30 (c)(1)-(4).

(c) The trust fund amount is the amount allocated for Radiological Decommissioning only. There are no past-due tax payments owed on the decommissioning trust fund activities as of December 31, 2022. Periodic payments of estimated income taxes are made by CEG during the year on a quarterly basis. CEG then obtains reimbursement from the trust funds. The reported trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2022.

(d) The funding mechanism being used as the source of revenues for the external sinking funds is a non-bypassable charge approved by the Pennsylvania Public Utilities Commission (PaPUC) authorizing PECO Energy Company to continue to collect decommissioning funds for CEG. Any needed adjustments to the amount collected will be made in the next filing of the Nuclear Decommissioning Cost Adjustment (NDCA) to the PaPUC. This cost adjustment is made every five years pursuant to PaPUC Electric Tariff No. 4. The last adjustment was effective January 1, 2023, and allows for the collection of annual payments from ratepayers of

$0 through 2039.

Page 2 of 2 ATTACHMENT 27 (continued)

Annual Radiological Decommissioning Funding Assurance Report for Salem Generating Station, Unit 2 (December 31, 2022 dollars, thousands)

(e) 10 CFR 50.75(e)(1)(ii) allows licensees to use a rate of return higher than 2% if the applicable rate-setting authority has specifically authorized a higher rate. The PaPUC approved a 3% real rate of return as part of the approval of the restructuring plan for PECO Energy Company (Letter from J. J. McNulty (PaPUC) to B. D. Crowe (PECO Energy Company), "Approval of Restructuring Plan for PECO Energy Company under Section 2806 of the Public Utility Code; Docket No. R-00973953,"

dated May 3, 2001). Accordingly, CEG uses a 3% real rate of return. The 3% is applicable through the decommissioning period as described in RAI #1 response provided in the Letter from Patrick R. Simpson (Exelon Generation Company, LLC) to U.S. NRC, "Response to Request for Additional Information Related to 2013 Report on Status of Decommissioning Funding for Reactors," dated August 15, 2013.

(f) For purposes of this report, permanent termination of operations (shutdown) is expected on April 18, 2040.

ATTACHMENT 28 Annual Radiological Decommissioning Funding Assurance and Spent Fuel Management Report for Three Mile Island Nuclear Station, Unit 1

Page 1 of 5 ATTACHMENT 28 Annual Radiological Decommissioning Funding Assurance and Spent Fuel Management Report for Three Mile Island Nuclear Station, Unit 1 (December 31, 2022 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c)

N/A (a) 2 Site-specific cost amount per 10 CFR 50.75(b)(4) and 50.75(f)

$855,397 (a) 3 Site-specific cost amount per 10 CFR 72.30(b)

$7,805 (b) 4 The amount of decommissioning trust funds accumulated as of December 31, 2022

$617,077 (c) 5 Schedule of the annual amounts remaining to be collected

$0 6

Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (d) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v) 8 Financial assurance for decommissioning is provided by the prepayment method, coupled with an external trust fund, in accordance with 10 CFR 50.75(e)(1)(i) 9 The trust fund agreements were amended effective February 1, 2022 to reflect the change in the name of company holding the trust as the result of Spin Transaction.

10 2022 annual amount spent on decommissioning in accordance with 10 CFR 50.82(a)(8)(v)(A)

$35,913(e) 11 Cumulative amount spent on decommissioning in accordance with 10 CFR 50.82(a)(8)(v)(A)

$163,190 Reimbursed from the decommissioning trust fund

$145,845 Not yet reimbursed from the decommissioning trust fund

$17,345 12 Amount of funds accumulated to cover the cost of managing irradiated fuel pursuant to 10 CFR 50.82(a)(8)(vii)(A) as of December 31, 2022 (c) 13 Projected cost of managing irradiated fuel based on site-specific estimate per 10 CFR 50.82(a)(8)(vii)(B)

$95,471 (a) 14 2022 annual amount spent on irradiated fuel management

$23,773 (e) 15 Cumulative amount spent on irradiated fuel management

$108,970 Reimbursed

$70,797 (f)

Not yet reimbursed

$38,173 16 Projected cost of Site restoration based on site-specific estimate per 10 CFR 50.82(a)(8)(vii)(B)

$106,878 17 2022 annual amount spent on site restoration

$0 (e) 18 Cumulative amount spent on site restoration

$0

Page 2 of 5 ATTACHMENT 28 (continued)

Annual Radiological Decommissioning Funding Assurance and Spent Fuel Management Report for Three Mile Island Nuclear Station, Unit 1 (December 31, 2022 dollars, thousands)

(a) A formula cost amount using the formula in 10 CFR 50.75(c) is not applicable because Three Mile Island, Unit 1, has been shutdown since September 2019, and some decommissioning activities have already occurred on this unit. However, the amount to decommission Three Mile Island, Unit 1, was calculated pursuant to 10 CFR 50.75(c) to be $553.0 million (as of December 31, 2022). The calculation of this value assumes the labor, energy, and burial factors described in Attachment 1 and does not account for decommissioning activities that have occurred for Three Mile Island, Unit 1.

In accordance with the regulatory requirements, the site-specific amount is reported per 10 CFR 50.75(b)(4), 50.75(f), 50.82(a)(8)(iii), and 50.82(a)(8)(v)(B) and assumes a SAFSTOR scenario as described in the site-specific cost estimate (SSCE)

("Updated Site-Specific Decommissioning Cost Estimate for Three Mile Island Nuclear Station, Unit 1," March 21, 2023). The costs have been escalated from the June 2022 dollars reflected in the decommissioning cost estimate to estimated costs as of December 31, 2022.

The amount reported does not include cash flows from the SSCE estimate for the 2018 - 2022 annual radiological and spent fuel costs because CEG considers the SSCE estimated cost for 2018 - 2022 decommissioning activities to be historical expenditures at the time the 2023 decommissioning funding assurance report is generated.

(b) The costs from the current detailed site-specific ISFSI decommissioning cost estimate have been escalated to December 31, 2022 dollars using published escalation indices. Attachment 30 provides information on the detailed decommissioning funding plan, detailed site-specific ISFSI decommissioning cost estimate, and the occurrence and the effect on the ISFSI decommissioning costs of the events listed in 10 CFR 72.30 (c)(1)-(4).

(c) The trust fund amount is the amount allocated for Radiological Decommissioning, Spent Fuel Management and Site Restoration. The Spent Fuel Management exemption allowing use of the trust fund for Spent Fuel Management was approved on October 16, 2019 (letter from U.S. Nuclear Regulatory Commission (J. Poole) to Exelon Generation Company, LLC (B. Hanson), "Three Mile Island Nuclear Station, Unit 1 - Exemption from the Requirements of 10 CFR 50.82(a)(8)(i)(A) and 10 CFR 50.75(h)(1)(iv) (EPID L-2019-LLE-0009), ML192549A179)." The Site Restoration exemption allowing use of the trust fund for Site restoration was approved on June 8, 2022 (letter from U.S. Nuclear Regulatory Commission (Amy M. Snyder) to Constellation Energy Generation, LLC (David P. Rhoades), "Three Mile Island Nuclear Station, Unit 1 - Exemption from the Requirements of 10 CFR 50.82(a)(8)(i)(A) AND 10 CFR 50.75(h)(1)(iv) (EPID: L-2021-LLE-0030),

ML21140A311)."

Page 3 of 5 ATTACHMENT 28 (continued)

Annual Radiological Decommissioning Funding Assurance and Spent Fuel Management Report for Three Mile Island Nuclear Station, Unit 1 (December 31, 2022 dollars, thousands)

There are no past-due tax payments related to decommissioning trust fund activities as of December 31, 2022. Periodic payments of estimated income taxes are made by CEG during the year on a quarterly basis. CEG then obtains reimbursements from the trust funds. The reported trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2022.

(d) A 2% annual real rate of return is used as allowed by 10 CFR 50.75(e)(1)(i).

(e) The amount spent on decommissioning in 2022 is consistent with the projected 2022 expense of $43,650 (December 31, 2022 thousands of dollars) from the site-specific cost estimate. The decrease of $7,736 can be attributed to the actual labor costs being lower than estimated.

The amount spent on irradiated fuel management in 2022 is consistent with the projected 2022 expense total of $17,176 (December 31, 2022 thousands of dollars) from the site-specific cost estimate (SSCE). The increase of $6,591 is due to timing of SFM spend.

The amount spent on site restoration in 2022 is consistent with the projected 2022 expense total of $0 (December 31, 2022 thousands of dollars) from the site-specific cost estimate (SSCE).

The amount spent on radiological decommissioning and irradiated fuel management in 2022 represents the 2022 charges to the TMI, Unit 1, project. Prior to reimbursement from the decommissioning trust fund, these charges will be validated to confirm they are legitimate decommissioning expenses. Consequently, the amount reimbursed may differ from the value provided.

(f) The amount of irradiated fuel management reimbursed is the total amount reimbursed from the decommissioning trust fund and the Department of Energy.

Page 4 of 5 ATTACHMENT 28 (continued)

Annual Radiological Decommissioning Funding Assurance and Spent Fuel Management Report for Three Mile Island Nuclear Station, Unit 1 (December 31, 2022 dollars, thousands)

Radiological BOY BOY EOY Decommisioning Trust Trust Fund Trust Trust Spent Fuel, & Site Fund Value Fund Fund Year Restoration Cost Value Less Cost Earnings Value 2023

$28,251

$617,077

$588,826

$11,777

$600,603 2024

$10,318

$600,603

$590,285

$11,806

$602,091 2025

$10,181

$602,091

$591,910

$11,838

$603,748 2026

$10,183

$603,748

$593,565

$11,871

$605,436 2027

$10,186

$605,436

$595,250

$11,905

$607,155 2028

$10,909

$607,155

$596,246

$11,925

$608,171 2029

$10,879

$608,171

$597,292

$11,946

$609,237 2030

$10,879

$609,237

$598,358

$11,967

$610,325 2031

$10,879

$610,325

$599,446

$11,989

$611,435 2032

$10,909

$611,435

$600,525

$12,011

$612,536 2033

$10,879

$612,536

$601,657

$12,033

$613,690 2034

$10,879

$613,690

$602,810

$12,056

$614,866 2035

$10,879

$614,866

$603,987

$12,080

$616,067 2036

$10,909

$616,067

$605,158

$12,103

$617,261 2037

$10,879

$617,261

$606,381

$12,128

$618,509 2038

$10,879

$618,509

$607,630

$12,153

$619,782 2039

$10,879

$619,782

$608,903

$12,178

$621,081 2040

$14,420

$621,081

$606,661

$12,133

$618,794 2041

$21,379

$618,794

$597,415

$11,948

$609,363 2042

$6,808

$609,363

$602,555

$12,051

$614,606 2043

$6,808

$614,606

$607,797

$12,156

$619,953 2044

$6,827

$619,953

$613,126

$12,263

$625,389 2045

$6,808

$625,389

$618,580

$12,372

$630,952 2046

$6,808

$630,952

$624,144

$12,483

$636,627 2047

$6,808

$636,627

$629,818

$12,596

$642,415 2048

$6,827

$642,415

$635,588

$12,712

$648,299 2049

$6,808

$648,299

$641,491

$12,830

$654,321 2050

$6,808

$654,321

$647,512

$12,950

$660,463 2051

$6,808

$660,463

$653,654

$13,073

$666,727 2052

$6,827

$666,727

$659,900

$13,198

$673,099 2053

$6,808

$673,099

$666,290

$13,326

$679,616 2054

$6,808

$679,616

$672,808

$13,456

$686,264

Page 5 of 5 ATTACHMENT 28 (continued)

Annual Radiological Decommissioning Funding Assurance and Spent Fuel Management Report for Three Mile Island Nuclear Station, Unit 1 (December 31, 2022 dollars, thousands)

Radiological BOY BOY EOY Decommisioning Trust Trust Fund Trust Trust Spent Fuel, & Site Fund Value Fund Fund Year Restoration Cost Value Less Cost Earnings Value 2055

$6,808

$686,264

$679,455

$13,589

$693,045 2056

$6,827

$693,045

$686,218

$13,724

$699,942 2057

$6,808

$699,942

$693,134

$13,863

$706,996 2058

$6,808

$706,996

$700,188

$14,004

$714,192 2059

$6,808

$714,192

$707,383

$14,148

$721,531 2060

$6,827

$721,531

$714,704

$14,294

$728,998 2061

$6,808

$728,998

$722,190

$14,444

$736,633 2062

$6,808

$736,633

$729,825

$14,597

$744,422 2063

$6,808

$744,422

$737,613

$14,752

$752,366 2064

$6,827

$752,366

$745,539

$14,911

$760,449 2065

$6,808

$760,449

$753,641

$15,073

$768,714 2066

$6,808

$768,714

$761,905

$15,238

$777,144 2067

$6,808

$777,144

$770,335

$15,407

$785,742 2068

$6,827

$785,742

$778,915

$15,578

$794,493 2069

$6,808

$794,493

$787,685

$15,754

$803,439 2070

$6,808

$803,439

$796,630

$15,933

$812,563 2071

$6,808

$812,563

$805,755

$16,115

$821,870 2072

$6,827

$821,870

$815,043

$16,301

$831,343 2073

$27,131

$831,343

$804,212

$16,084

$820,296 2074

$75,803

$820,296

$744,494

$14,890

$759,383 2075

$100,035

$759,383

$659,349

$13,187

$672,536 2076

$100,309

$672,536

$572,227

$11,445

$583,671 2077

$95,518

$583,671

$488,154

$9,763

$497,917 2078

$88,109

$497,917

$402,003

$8,040

$410,043 2079

$36,356

$410,043

$373,687

$7,474

$381,161 2080

$49,699

$381,161

$331,462

$6,629

$338,092 2081

$38,017

$338,092

$300,075

$6,001

$306,076 Total*

$1,057,744

Column may not add due to rounding

ATTACHMENT 29 ISFSI Decommissioning Funding Estimates

Page 1 of 12 ATTACHMENT 29 ISFSI Decommissioning Funding Estimates Braidwood Station (December 31, 2022 dollars, thousands)

ActivityDescription Removal Costs Packaging Costs Transportation Costs LLRW Disposal Costs Other Costs Total Costs Burial Volume ClassA (ft3)

DecommissioningContractor

Decontamination(activated dispositon)

$829

$176

$461

$1,631

$3,097 47,164 CharacterizationandLicensing Surveys

$6,029

$6,029 Subtotal

$829

$176

$461

$1,631

$6,029

$9,125 47,164

SupportingCosts

UtilityStaffCost

$582

$582 SecurityStaffCost

$687

$687 InsuranceandNRCFees

$1,408

$1,408 PropertyTaxes

$795

$795 PlantEnergyBudget

$38

$38 EquipmentandSupplies

$48

$48 Subtotal

$48

$0

$3,510

$3,557 Totalw/ocontingency

$877

$176

$461

$1,631

$9,538

$12,682 47,164 Totalwith25%contingency

$1,096

$219

$576

$2,039

$11,923

$15,853 Note: Values may not add due to rounding.

Costs for ISFSI decommissioning are split equally between the two units.

Page 2 of 12 ATTACHMENT 29 (Continued)

ISFSI Decommissioning Funding Estimates Byron Station (December 31, 2022 dollars, thousands)

ActivityDescription Removal Costs Packaging Costs Transportation Costs LLRW Disposal Costs Other Costs TotalCosts Burial Volume ClassA(ft3)

DecommissioningContractor

Decontamination(activated dispositon)

$782

$191

$609

$1,649

$3,231 47,164 CharacterizationandLicensing Surveys

$4,889

$4,889 Subtotal

$782

$191

$609

$1,649

$4,889

$8,120 47,164

SupportingCosts

UtilityStaffCost

$599

$599 SecurityStaffCost

$707

$707 InsuranceandNRCFees

$1,241

$1,241 PropertyTaxes

$819

$819 PlantEnergyBudget

$37

$37 EquipmentandSupplies

$47

$47 Subtotal

$47

$0

$3,404

$3,450 Totalw/ocontingency

$829

$191

$609

$1,649

$8,293

$11,570 47,164 Totalwith25%contingency

$1,036

$239

$761

$2,061

$10,366

$14,463 Note: Values may not add due to rounding.

Costs for ISFSI decommissioning are split equally between the two units.

Page 3 of 12 ATTACHMENT 29 (Continued)

ISFSI Decommissioning Funding Estimates Calvert Cliffs Nuclear Power Plant (December 31, 2022 dollars, thousands)

ActivityDescription Removal Costs Packaging Costs Transportation Costs LLRW Disposal Costs Other Costs Total Costs Burial Volume ClassA (ft3)

DecommissioningContractor

Decontamination(activated dispositon)

$1,652

$170

$545

$1,346

$3,712 40,426 CharacterizationandLicensing Surveys

$4,348

$4,348 Subtotal

$1,652

$170

$545

$1,346

$4,348

$8,061 40,426

SupportingCosts

UtilityStaffCost

$546

$546 SecurityStaffCost

$605

$605 InsuranceandNRCFees

$1,092

$1,092 PropertyTaxes

$753

$753 PlantEnergyBudget

$34

$34 EquipmentandSupplies

$58

$58 Subtotal

$58

$0

$3,030

$3,088 Totalw/ocontingency

$1,710

$170

$545

$1,346

$7,378

$11,149 40,426 Totalwith25%contingency

$2,138

$213

$681

$1,682

$9,223

$13,936 Note: Values may not add due to rounding.

Costs for ISFSI decommissioning are split equally between the two units.

Page 4 of 12 ATTACHMENT 29 (Continued)

ISFSI Decommissioning Funding Estimates Clinton Power Station (December 31, 2022 dollars, thousands)

ActivityDescription Removal Costs Packaging Costs Transportation Costs LLRW Disposal Costs Other Costs Total Costs Burial Volume ClassA (ft3)

DecommissioningContractor

Decontamination(activated dispositon)

$759

$182

$506

$1,864

$3,312 53,901 CharacterizationandLicensing Surveys

$2,234

$2,234 Subtotal

$759

$182

$506

$1,864

$2,234

$5,546 53,901

SupportingCosts

UtilityStaffCost

$578

$578 SecurityStaffCost

$668

$668 InsuranceandNRCFees

$905

$905 PropertyTaxes

$915

$915 PlantEnergyBudget

$38

$38 EquipmentandSupplies

$44

$44 Subtotal

$44

$0

$3,105

$3,149 Totalw/ocontingency

$803

$182

$506

$1,864

$5,339

$8,694 53,901 Totalwith25%contingency

$1,003

$228

$633

$2,330

$6,674

$10,868 Note: Values may not add due to rounding.

Page 5 of 12 ATTACHMENT 29 (Continued)

ISFSI Decommissioning Funding Estimates Dresden Nuclear Power Station (December 31, 2022 dollars, thousands)

ActivityDescription Removal Costs Packaging Costs Transportation Costs LLRW Disposal Costs Other Costs TotalCosts Burial Volume ClassA(ft3)

DecommissioningContractor

Decontamination(activated dispositon)

$1,081

$315

$878

$2,591

$4,865 74,114 CharacterizationandLicensing Surveys

$6,367

$6,367 Subtotal

$1,081

$315

$878

$2,591

$6,367

$11,231 74,114

SupportingCosts

UtilityStaffCost

$600

$600 SecurityStaffCost

$710

$710 InsuranceandNRCFees

$1,260

$1,260 PropertyTaxes

$819

$819 PlantEnergyBudget

$37

$37 EquipmentandSupplies

$48

$48 Subtotal

$48

$0

$3,427

$3,475 Totalw/ocontingency

$1,129

$315

$878

$2,591

$9,793

$14,706 74,114 Totalwith25%contingency

$1,411

$394

$1,098

$3,238

$12,242

$18,383 Note: Values may not add due to rounding.

Costs for ISFSI decommissioning are split as following: Unit 1 - 21%, Unit 2 - 39%, Unit 3 - 39%.

Page 6 of 12 ATTACHMENT 29 (Continued)

ISFSI Decommissioning Funding Estimates James A. FitzPatrick Nuclear Power Station (December 31, 2022 dollars, thousands)

ActivityDescription Removal Costs Packaging Costs Transportation Costs LLRW Disposal Costs Other Costs Total Costs Burial Volume ClassA (ft3)

DecommissioningContractor

Decontamination(activated dispositon)

$776

$202

$896

$2,097

$3,972 60,639 CharacterizationandLicensing Surveys

$2,724

$2,724 Subtotal

$776

$202

$896

$2,097

$2,724

$6,696 60,639

SupportingCosts

UtilityStaffCost

$585

$585 SecurityStaffCost

$699

$699 InsuranceandNRCFees

$891

$891 PropertyTaxes

$795

$795 PlantEnergyBudget

$31

$31 EquipmentandSupplies

$44

$44 Subtotal

$44

$0

$3,002

$3,046 Totalw/ocontingency

$820

$202

$896

$2,097

$5,726

$9,742 60,639 Totalwith25%contingency

$1,025

$253

$1,121

$2,622

$7,157

$12,177 Note: Values may not add due to rounding.

Page 7 of 12 ATTACHMENT 29 (Continued)

ISFSI Decommissioning Funding Estimates LaSalle Generation Station (December 31, 2022 dollars, thousands)

ActivityDescription Removal Costs Packaging Costs Transportation Costs LLRW Disposal Costs Other Costs Total Costs Burial Volume ClassA (ft3)

DecommissioningContractor

Decontamination(activated dispositon)

$1,003

$279

$772

$2,796

$4,850 80,852 CharacterizationandLicensing Surveys

$6,355

$6,355 Subtotal

$1,003

$279

$772

$2,796

$6,355

$11,204 80,852

SupportingCosts

UtilityStaffCost

$579

$579 SecurityStaffCost

$673

$673 InsuranceandNRCFees

$1,424

$1,424 PropertyTaxes

$795

$795 PlantEnergyBudget

$38

$38 EquipmentandSupplies

$45

$45 Subtotal

$45

$0

$3,510

$3,554 Totalw/ocontingency

$1,048

$279

$772

$2,796

$9,864

$14,759 80,852 Totalwith25%contingency

$1,310

$349

$964

$3,495

$12,330

$18,449 Note: Values may not add due to rounding.

Costs for ISFSI decommissioning are split equally between the units

Page 8 of 12 ATTACHMENT 29 (Continued)

ISFSI Decommissioning Funding Estimates Nine Mile Point Nuclear Station (December 31, 2022 dollars, thousands)

ActivityDescription Removal Costs Packaging Costs Transportation Costs LLRW Disposal Costs Other Costs Total Costs Burial Volume ClassA (ft3)

DecommissioningContractor

Decontamination(activated dispositon)

$780

$203

$888

$2,097

$3,969 60,639 CharacterizationandLicensing Surveys

$4,230

$4,230 Subtotal

$780

$203

$888

$2,097

$4,230

$8,198 60,639

SupportingCosts

UtilityStaffCost

$585

$585 SecurityStaffCost

$699

$699 InsuranceandNRCFees

$1,222

$1,222 PropertyTaxes

$1,590

$1,590 PlantEnergyBudget

$31

$31 EquipmentandSupplies

$44

$44 Subtotal

$44

$0

$4,127

$4,171 Totalw/ocontingency

$824

$203

$888

$2,097

$8,356

$12,369 60,639 Totalwith25%contingency

$1,031

$254

$1,110

$2,622

$10,445

$15,461 Note: Values may not add due to rounding.

Costs for ISFSI decommissioning are split equally between the units.$7,731 is the total cost for Nine Mile Point Unit 2. Constellation is responsible for 82% of this cost and LIPA is responsible for 18% of this cost.

Page 9 of 12 ATTACHMENT 29 (Continued)

ISFSI Decommissioning Funding Estimates R.E. Ginna Nuclear Power Plant (December 31, 2022 dollars, thousands)

ActivityDescription Removal Costs Packaging Costs Transportation Costs LLRW Disposal Costs Other Costs Total Costs Burial Volume ClassA (ft3)

DecommissioningContractor

Decontamination(activated dispositon)

$538

$87

$376

$932

$1,933 26,951 CharacterizationandLicensing Surveys

$2,018

$2,018 Subtotal

$538

$87

$376

$932

$2,018

$3,951 26,951

SupportingCosts

UtilityStaffCost

$599

$599 SecurityStaffCost

$758

$758 InsuranceandNRCFees

$690

$690 PropertyTaxes

$795

$795 PlantEnergyBudget

$31

$31 EquipmentandSupplies

$42

$42 Subtotal

$42

$0

$2,873

$2,916 Totalw/ocontingency

$580

$87

$376

$932

$4,891

$6,867 26,951 Totalwith25%contingency

$725

$108

$471

$1,165

$6,114

$8,583 Note: Values may not add due to rounding.

Page 10 of 12 ATTACHMENT 29 (Continued)

ISFSI Decommissioning Funding Estimates Quad Cities Nuclear Power Stationf (December 31, 2022 dollars, thousands)

ActivityDescription Removal Costs Packaging Costs Transportation Costs LLRW Disposal Costs Other Costs Total Costs Burial Volume ClassA (ft3)

DecommissioningContractor

Decontamination(activated dispositon)

$1,726

$281

$659

$2,467

$5,134 74,114 CharacterizationandLicensing Surveys

$5,335

$5,335 Subtotal

$1,726

$281

$659

$2,467

$5,335

$10,469 74,114

SupportingCosts

UtilityStaffCost

$560

$560 SecurityStaffCost

$668

$668 InsuranceandNRCFees

$1,054

$1,054 PropertyTaxes

$753

$753 PlantEnergyBudget

$29

$29 EquipmentandSupplies

$51

$51 Subtotal

$51

$0

$3,065

$3,116 Totalw/ocontingency

$1,777

$281

$659

$2,467

$8,400

$13,585 74,114 Totalwith25%contingency

$2,221

$351

$824

$3,084

$10,500

$16,981 Note: Values may not add due to rounding.

Costs for ISFSI decommissioning are split equally between the units. Constellation is responsible for 75% of this cost and MidAmerican is responsible for 25% of this cost.

Page 11 of 12 ATTACHMENT 29 (Continued)

ISFSI Decommissioning Funding Estimates Salem Generating Station (December 31, 2022 dollars, thousands)

ActivityDescription Removal Costs Packaging Costs Transportation Costs LLRW Disposal Costs Other Costs Total Costs Burial Volume ClassA (ft3)

DecommissioningContractor

Decontamination(activated dispositon)

$381

$271

$749

$2,404

$3,806 71,319 CharacterizationandLicensing Surveys

$2,682

$2,682 Subtotal

$381

$271

$749

$2,404

$2,682

$6,488 71,319

SupportingCosts

NRCandNRCContractorFees

$472

$472 Insurance

$165

$165 Propertytaxes

$15

$15 Plantenergybudget

$7

$7 BarnwellAnnualAccessFee

$289

$289 SecurityStaffCost

$0

$0 UtilityStaffCost

Subtotal

$0

$948

$948 Totalw/ocontingency

$381

$271

$749

$2,404

$3,630

$7,436 71,319 Totalwith25%contingency

$477

$339

$936

$3,006

$4,538

$9,295 Note: Values may not add due to rounding.

Costs for ISFSI decommissioning are split equally between the units. Constellation is responsible for 42.59% of this cost and PSEG is responsible for 57.41%% of this cost.

Page 12 of 12 ATTACHMENT 29 (Continued)

ISFSI Decommissioning Funding Estimates Three Mile Island Nuclear Station, Unit 1 (December 31, 2022 dollars, thousands)

ActivityDescription Removal Costs Packaging Costs Transportation Costs LLRW Disposal Costs Other Costs Total Costs Burial Volume ClassA (ft3)

DecommissioningContractor

Decontamination(activated dispositon)

$714

$128

$431

$1,122

$2,394 33,688 CharacterizationandLicensing Surveys

$1,787

$1,787 Subtotal

$714

$128

$431

$1,122

$1,787

$4,181 33,688

SupportingCosts

UtilityStaffCost

$578

$578 SecurityStaffCost

$746

$746 InsuranceandNRCFees

$600

$600 PropertyTaxes

$61

$61 PlantEnergyBudget

$26

$26 EquipmentandSupplies

$52

$52 Subtotal

$52

$0

$2,011

$2,063 Totalw/ocontingency

$766

$128

$431

$1,122

$3,797

$6,244 33,688 Totalwith25%contingency

$957

$160

$539

$1,402

$4,747

$7,805 Note: Values may not add due to rounding.

ATTACHMENT 30 Independent Spent Fuel Storage Installation Decommissioning Funding Plan Updates

Page 1 of 5 ATTACHMENT 30 Independent Spent Fuel Storage Installation Decommissioning Funding Plan Updates Pursuant to 10 CFR 72.30(b), decommissioning funding plans (DFPs) are required for all independent spent fuel storage installations (ISFSls). One piece of the DFP is a detailed ISFSI decommissioning estimate. The detailed cost estimate is periodically revised based on the schedule for refreshing the full decommissioning cost estimate for the site.

In accordance with 10 CFR 72.30(c), "At the time of license renewal and at intervals not to exceed 3 years, the decommissioning funding plan must be resubmitted with adjustments as necessary to account for changes in costs and the extent of contamination." To update its DFPs, CEG either makes a full update to the DFP, updates the detailed ISFSI decommissioning cost estimate and affirms that the remainder of the DFP has not changed, or escalates the ISFSI decommissioning cost estimate and affirms that the remainder of the DFP has not changed.

Along with each DFP update for each ISFSI, information on the occurrence, and the effect on decommissioning costs, of each of the events listed in 10 CFR 72.30(c)(1)-(4):

(1) spills of radioactive material producing additional residual radioactivity in onsite subsurface material, (2) facility modifications, (3) changes in authorized possession limits, and (4) actual remediation costs that exceed the previous cost estimate must be included.

The table below specifies the current detailed DFP and current detailed decommissioning cost estimate for each Constellation Energy Generation, LLC (CEG) ISFSI. The current detailed DFP is unchanged as of December 31, 2022 for all CEG ISFSIs. For Limerick, and Peach Bottom ISFSIs, the current detailed ISFSI decommissioning cost estimate is unchanged as of December 31, 2022. The ISFSI decommissioning cost escalated to December 31, 2022 dollars is contained in the attachment to this letter indicated in the table below. For Braidwood, Byron, Calvert Cliffs, Clinton, Dresden, Ginna, FitzPatrick, LaSalle, Nine Mile Point, Quad Cities, Salem and TMI ISFSIs, a new detailed ISFSI decommissioning cost estimate is provided in Attachment 29 of this letter.

Page 2 of 5 ATTACHMENT 30 (Continued)

Independent Spent Fuel Storage Installation Decommissioning Funding Plan Updates ISFSI Facility Current Detailed DFP Current Detailed Cost Estimate Current Dollar Cost Estimate Braidwood Station Reference 1 9 9 Byron Station Reference 1 9 9 Calvert Cliffs Nuclear Power Plant Reference 2 9 9 Clinton Power Station References 3 and 4 Attachment 29 9 Dresden Nuclear Power Station Reference 1 9 9 James A. FitzPatrick Nuclear Power Station Reference 5 9 9 LaSalle County Station Reference 1 9 9 Limerick Generating Station Reference 1 Reference 7 5/16 Nine Mile Point Nuclear Station Reference 2 9 9 Peach Bottom Atomic Power Station Reference 1 Reference 7 1/22 Quad Cities Nuclear Power Station Reference 1 9 9 R.E. Ginna Nuclear Power Plant Reference 2 9 9 Salem Generating Station Reference 1 9 9 Three Mile Island Nuclear Station, Unit 1 Reference 8 9 9

Page 3 of 5 ATTACHMENT 30 (Continued)

Independent Spent Fuel Storage Installation Decommissioning Funding Plan Updates The effect of each of the events listed in 10 CFR 72.30(c)(1) through (4) on the detailed cost estimates provided in Reference 7 for the ISFSIs at Limerick, and Peach Bottom is listed below. For these ISFSIs, the most recent DFP update prior to the one contained herein is contained in Reference 7. Reference 7 provides the effect of the events listed in 10 CFR 72.30(c)(1) through (4) as of December 31, 2020. Consequently, the effect of the events from December 31, 2020 through December 31, 2022 is provided below.

(1)

Spills of radioactive material producing additional residual radioactivity in onsite subsurface material:

No impact. There have not been any spills of radioactive material producing additional residual radioactivity in onsite subsurface material in 2021 or 2022 at any of the ISFSls at the facilities listed above.

(2)

Facility modifications:

No impact. There have not been any modifications to the ISFSls at the facilities listed above in 2021 or 2022 that would materially change the latest decommissioning cost estimate.

The ISFSI facility design at the time the cost estimate was prepared was incorporated in the estimate for the facilities listed above. Also, any ISFSI modifications (i.e., ISFSI pad expansions) required to accommodate spent fuel storage after permanent shutdown were incorporated in the cost estimate.

(3)

Changes in authorized possession limits:

No impact. There have not been any changes in authorized possession limits at the ISFSls at the facilities listed above during 2021 or 2022 that would materially change the decommissioning cost estimate.

The capacity of the cask used at the ISFSI at the time the cost estimate was performed was incorporated in the estimate for the facilities listed above.

(4)

Actual remediation costs that exceed the previous cost estimate:

No impact. As of December 31, 2022, decommissioning had not begun at any of the ISFSls listed above. Consequently, there have been no actual remediation costs that exceed the latest cost estimate.

Page 4 of 5 ATTACHMENT 30 (Continued)

Independent Spent Fuel Storage Installation Decommissioning Funding Plan Updates In Attachment 29 of this letter, decommissioning cost estimates are provided for the ISFSls at Braidwood, Byron, Calvert Cliffs, Clinton, Dresden, Ginna, FitzPatrick, LaSalle, Nine Mile Point, Salem, Quad Cities and TMI. The detailed cost estimates for Braidwood, Byron, Clinton, Dresden, Ginna, FitzPatrick, LaSalle, Nine Mile Point, and Salem ISFSIs were prepared in 2021. The detailed cost estimates for Calvert Cliffs, Quad Cities and TMI ISFSIs were prepared in 2022. Each of the items listed in 10 CFR 72.30(c)(1) through (4) was considered in preparation of the updated cost estimate. Additionally, the effect of the items in 10 CFR 72.30(c) from cost estimate completion to December 31, 2022 were reviewed. A discussion of each item is included below.

(1)

Spills of radioactive material producing additional residual radioactivity in onsite subsurface material:

No impact. There were no spills of radioactive material producing additional residual radioactivity in onsite subsurface material at any of the ISFSls at the facilities listed above through December 31, 2022.

(2)

Facility modifications:

No impact. There have not been any modifications to the ISFSls at the facilities listed above during 2022 that would materially change the latest decommissioning cost estimate.

The ISFSI facility design at the time the updated cost estimate was prepared was incorporated in the estimate for the facilities listed above. Also, any ISFSI modifications (i.e., ISFSI pad expansions) required to accommodate spent fuel storage after permanent shutdown were incorporated in the updated cost estimate.

(3)

Changes in authorized possession limits:

No impact. There have not been any changes in authorized possession limits at the ISFSls at the facilities listed above during 2022 that would materially change the latest decommissioning cost estimate.

The capacity of the cask used at the ISFSI at the time the updated cost estimate was performed was incorporated in the estimate for the facilities listed above. The cask size did not change in the updated estimate relative to the previous estimate for the other ISFSIs.

(4)

Actual remediation costs that exceed the previous cost estimate:

No impact. As of December 31, 2022, decommissioning had not begun at any of the ISFSls listed above. Consequently, there have been no actual remediation costs that exceed the costs included in the latest cost estimate.

Page 5 of 5 ATTACHMENT 30 (Continued)

Independent Spent Fuel Storage Installation Decommissioning Funding Plan Updates References

1. Letter from Patrick R. Simpson (CEG) to U.S. Nuclear Regulatory Commission, "Proposed Independent Spent Fuel Storage Installation (ISFSI) Decommissioning Funding Plans for Braidwood, Byron, Dresden, LaSalle, Limerick, Oyster Creek, Peach Bottom, Quad Cities, and Salem," dated December 17, 2012

2. Letter from Stephen A. Mormann (Constellation Energy Nuclear Group, LLC) to U.S. Nuclear Regulatory Commission, "ISFSI Decommissioning Funding Plans,"

dated December 17, 2012

3. Letter from David M. Gullott (CEG) to U.S. Nuclear Regulatory Commission, "Proposed Independent Spent Fuel Storage Installation (ISFSI) Decommissioning Funding Plans for Clinton Power Station," dated September 6, 2016

4. Letter from Patrick R. Simpson (CEG) to U.S. Nuclear Regulatory Commission, "Report on Status of Decommissioning Funding for Reactors and Independent Spent Fuel Storage Installations," dated March 30, 2017

5. Letter from Patrick R. Simpson (CEG) to U.S. Nuclear Regulatory Commission, "Report on the Status of Decommissioning Funding for James A. Fitzpatrick Nuclear Power Plant Independent Spent Fuel Storage Installation," dated December 10, 2018

6. Letter from Patrick R. Simpson (CEG) to U.S. Nuclear Regulatory Commission, "Response to Request for Additional Information Regarding Decommissioning Funding Plans for Independent Spent Fuel Storage Installations (ISFSIs)," dated May 2, 2018

7. Letter from Patrick R. Simpson (CEG) to U.S. Nuclear Regulatory Commission, "Report on Status of Decommissioning Funding for Reactors and Independent Spent Fuel Storage Installation," dated February 24, 2021

8. Letter from Patrick R. Simpson (CEG) to U.S. Nuclear Regulatory Commission, "Proposed Independent Spent Fuel Storage Installation (ISFSI) Decommissioning Funding Plans for Three Mile Island, Unit 1" dated July 15, 2021

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