RS-25-155, Request for Exemption from 10 CFR 50.82(a)(8)

Request for Exemption from 10 CFR 50.82(a)(8)

ML25311A143
Person / Time
Site:	Byron, Braidwood, LaSalle
Issue date:	11/07/2025
From:	Steinman R Constellation Energy Generation
To:	Office of Nuclear Material Safety and Safeguards, Office of Nuclear Reactor Regulation, Document Control Desk
References
RS-25-155
Download: ML25311A143 (1)

Text

4300 Winfield Road Warrenville, IL 60555 630 657 2000 Office RS-25-155 10 CFR 50.12 10 CFR 50.82(a)(8)(i) and (ii)

November 7, 2025 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555-0001

Subject:

Request for Exemption from 10 CFR 50.82(a)(8)

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 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 In accordance with 10 CFR 50.12, Constellation Energy Generation, LLC (CEG) is requesting the U.S. Nuclear Regulatory Commission (NRC) approval of an exemption from 10 CFR 50.82(a)(8)(i) and (ii) for Braidwood Station, Units 1 and 2 (Braidwood), Byron Station, Units 1 and 2 (Byron), and LaSalle County Station, Units 1 and 2 (LaSalle) to establish and fund subaccounts within the respective nuclear decommissioning trusts (NDTs) that would not be part of the funds necessary to provide funding assurance per 10 CFR 50.75.

The requested exemptions would allow CEG to periodically transfer earnings from funds dedicated for activities consistent with the definition of ³decommission' in 10 CFR 50.2 (radiological decommissioning) into separately maintained subaccounts still within the NDT.

Funds accumulated in the subaccounts could be used to pay for activities that are part of the larger decommissioning process and not exclusively dedicated for radiological decommissioning, as strictly defined by the NRC. Transfers are limited to earnings from funds dedicated to radiological decommissioning in excess of that allowed to be credited by the NRC (2 percent) per 10 CFR 50.75. These newly established sub-accounts would not receive funds transferred from existing accounts dedicated to radiological decommissioning.

Funds in non-50.75 subaccounts would not be dedicated to radiological decommissioning and could be used to pay for ³decommissioning costs' as defined in 26 CFR 1.468A-1(b)(6) in the Treasury Department regulations for Section 468A of the Internal Revenue Code. This definition includes costs for radiological and non-radiological activities and certain spent fuel management activities whether the plant is operating or has permanently ceased operations. Thus, the funds could be used to pay for activities that are part of the larger decommissioning process that include transferring and safely storing spent fuel at the Independent Spent Fuel Storage

U.S. Nuclear Regulatory Commission November 7, 2025 Page 2 Installations (ISFSIs) and decontamination, removal, and disposal of retired radioactive components, which are under the regulatory authority of the NRC. Future Decommissioning Funding Assurance Reports required by 10 CFR 50.75(f)(1) will include the amount of funds transferred to the subaccounts since the last report.

The exemption request, if granted, would rely on earnings during operations. Therefore, the exemptions would only be needed during the operating lives of the reactors. The exemptions allowing movement of funds to the subaccounts would expire effective on an individual reactor basis at the time the certifications of permanent cessation of operations and permanent removal of fuel from the reactor vessel required under 10 CFR.82(a)(1)(i) and (ii) are docketed. During decommissioning, funds already held in the subaccounts would be available, but not exclusively dedicated, to radiological decommissioning.

If approved, this exemption will facilitate activities that are part of the larger decommissioning process at Braidwood, Byron, and LaSalle during operations, spent fuel management and site restoration, reduce overall decommissioning costs, and reduce an unnecessary regulatory burden on CEG.

As described more fully in the attachments, the NDTs at Braidwood, Byron, and LaSalle were originally established through ratepayer collections for the defined purpose of decommissioning Braidwood, Byron, and LaSalle; Because these trusts currently contain funds substantially in excess of those required for radiological decommissioning, the transfer would have no adverse impact on those future decommissioning activities.

CEG requests that the NRC grant the requested exemption because:

(1)

The exemption, "will not present an undue risk to the public health and safety, and

[is] consistent with the common defense and security," in accordance with 10 CFR 50.12(a)(1), and (2)

Special circumstances are present that satisfy 10 CFR 50.12(a)(2).

CEG demonstrates in the attachments that the request satisfies these provisions. Granting this exemption is consistent with the NRC decommissioning regulations (see 10 CFR 50.82(a)(6))

as it would not:

(1) eliminate the potential for unrestricted site release; (2) have a significant environmental impact not previously considered in environmental impact statements (EISs); or (3) decrease reasonable assurance that adequate funds will be available for decommissioning.

The exemption would support efforts to ultimately achieve unrestricted release of Braidwood, Byron, and LaSalle, thus improving environmental conditions. In addition, prompt disposal when cost effective disposal alternatives are available eliminates future price uncertainty and potential risks associated with the future availability of disposal capacity.

Granting this request would facilitate the overall decommissioning process through radiological and non-radiological activities and certain spent fuel management activities. The funds could be used to pay for activities that are part of the larger decommissioning process that can include

U.S. Nuclear Regulatory Commission November 7, 2025 Page 3 transferring and safely storing spent fuel at the ISFSIs and decontamination, removal, and disposal of radioactive components. The adequacy of the available funds for Braidwood, Byron, and LaSalle decommissioning is supported by the site-specific decommissioning cost estimate and the associated funding program.

The NRC has issued an interim staff guidance (ISG) that addresses using the exemption process to allow the use of the NDTs to dispose of Major Radioactive Components (MRCs).

This exemption request under 10 CFR 50.12 to fund the subaccounts using earnings from NDT funds dedicated for radiological decommissioning is similar in nature to the MRC exemption request. Hence, CEG will follow the ISG to the best of its ability to support this exemption request.

CEG is submitting this exemption request to provide timely resolution of this issue and support planning activities. Accordingly, CEG requests approval of this request by July 31, 2026, to avoid the resource allocation and other expenses associated with activities that are part of the larger decommissioning process, which would be avoided if NDT subaccount funds can be used for activities not exclusively dedicated for radiological decommissioning.

This letter and attachment contain no new regulatory commitments.

Should you have any questions concerning this request, please contact Mr. Jeff Dunlap at (779) 231-5216.

Respectfully, Rebecca L. Steinman Sr. Manager +/- Licensing Constellation Energy Generation, LLC Attachments:

1. Request for Exemption from 10 CFR 50.82(a)(8)(i) and (ii)

2. Table 8 Decommissioning Cash Flow Analysis for Braidwood, Unit 1 SAFSTOR Radiological

3. Table 9 Decommissioning Cash Flow Analysis for Braidwood, Unit 2 SAFSTOR Radiological

4. Table 10 Decommissioning Cash Flow Analysis for Braidwood, Unit 1 SAFSTOR Total

5. Table 11 Decommissioning Cash Flow Analysis for Braidwood, Unit 2 SAFSTOR Total

6. Table 12 Decommissioning Cash Flow Analysis for Byron, Unit 1 SAFSTOR Radiological

7. Table 13 Decommissioning Cash Flow Analysis for Byron, Unit 2 SAFSTOR Radiological

U.S. Nuclear Regulatory Commission November 7, 2025 Page 4

8. Table 14 Decommissioning Cash Flow Analysis for Byron, Unit 1 SAFSTOR Total

9. Table 15 Decommissioning Cash Flow Analysis for Byron, Unit 2 SAFSTOR Total

10. Table 16 Decommissioning Cash Flow Analysis for LaSalle, Unit 1 SAFSTOR Radiological

11. Table 17 Decommissioning Cash Flow Analysis for LaSalle, Unit 2 SAFSTOR Radiological

12. Table 18 Decommissioning Cash Flow Analysis for LaSalle, Unit 1 SAFSTOR Total

13. Table 19 Decommissioning Cash Flow Analysis for LaSalle, Unit 2 SAFSTOR Total

14. Table 20 Parent Guarantee Qualification Request for Exemption from 10 CFR 50.82(a)(8)(i) and (ii)

I.

Exemption Request In accordance with the provisions of 10 CFR 50.12, "Specific Exemptions," Constellation Energy Generation, LLC (CEG) requests that the U.S. Nuclear Regulatory Commission (NRC) grant an exemption from provisions of 10 CFR 50.82, "Termination of License." Specifically, CEG requests an exemption from the requirements in 10 CFR 50.82(a)(8)(i) and (ii) in order to establish and fund subaccounts within the nuclear decommissioning trust funds (NDTs) to pay for activities that are part of the larger decommissioning process and not exclusively dedicated to radiological decommissioning. In addition, this request follows the Interim Staff Guidance (ISG) issued by NRC staff that defines the information that would assist the NRC in evaluating a similar exemption request.1 The purpose of this exemption request is to establish and fund subaccounts with earnings in excess of that allowed to be credited by the NRC (2 percent) within the Braidwood Station, Units 1 and 2 (Braidwood), Byron Station, Units 1 and 2 (Byron), and LaSalle County Station, Units 1 and 2 (LaSalle) NDTs. The subaccounts will be used for activities that are part of the larger decommissioning process which will result in several benefits, as follows:

1) the inventory of radioactive waste and associated source term at each site will be reduced;

2) the costs associated with maintaining any retired major components and irradiated hardware on site and providing protection to workers from these can be avoided;

3) the overall cost to decommission the site will be reduced;

4) any uncertainty regarding future disposal cost and capacity is eliminated; and

5) assurance of adequate funds will be available to decommission the reactor at the time the reactors cease operation will be maintained.

Finally, the adequacy of the availability of funds for Braidwood, Byron, and LaSalle decommissioning is supported by the site-specific decommissioning cost estimate (DCE) and the associated funding program.

Authorization of the use of NDT funds for activities that are part of the larger decommissioning process is in the public interest because it would immediately reduce on-site waste inventories, eliminate risks associated with future disposal, and reduce the eventual cost and complexity of decommissioning Braidwood, Byron, and LaSalle. Consequently, authorization to create and fund subaccounts within the NDT would further the purpose of 10 CFR 50.82(a)(8), which is to provide reasonable assurance that the decommissioning trust funds will be adequate to accomplish their intended purpose.

Funds that will be deposited into the newly established subaccounts will not be taken from the existing funds dedicated to radiological decommissioning. Those funds will remain untouched and continue to meet NRC minimum funding and other decommissioning obligations. Rather, 1 "Interim Staff Guidance on the Use of the Decommissioning Trust Fund During Operations for Major Radioactive Component Disposal," August 5, 2024.

Request for Exemption from 10 CFR 50.82(a)(8)(i) and (ii) the subaccounts will be funded exclusively from investment earnings above and beyond the 2 percent assumed real rate of return allowed by the NRC at 10 C.F.R. 50.75(e).

II.

Requirements The NRC regulations in 10 CFR 50.82(a)(8)(i) provide that decommissioning trust funds may be used by CEG if:

(A) The withdrawals are for expenses for legitimate decommissioning activities consistent with the definition of decommissioning in 10 CFR 50.2; (B) The expenditure would not reduce the value of the NDT below an amount necessary to place and maintain the reactor in a safe storage condition if unforeseen conditions or expenses arise; (C) The expenditure would not inhibit the ability of CEG to complete funding of any shortfalls in the NDT needed to ensure the availability of funds to ultimately release the site and terminate the license.

10 CFR 50.82(a)(8)(i)(A) refers to the definition of "decommissioning" in 10 CFR 50.2, which defines the term "decommission" rather than "decommissioning." By that definition, the term "decommission" means:

to remove a facility or site safely from service (emphasis added) and reduce residual radioactivity to a level that permits+/-

(1) release of the property for unrestricted use and termination of the license; or (2) release of the property under restricted conditions and termination of the license.

The NRC has further conditioned the withdrawal of decommissioning trust funds by limiting the withdrawal rate from the trust. 10 CFR 50.82(a)(8)(ii) provides:

Initially, 3 percent of the generic amount specified in 10 CFR 50.75 may be used for decommissioning planning. For licensees that have submitted the certifications required under 10 CFR 50.82(a)(1) and commencing 90 days after the NRC has received the post-shutdown decommissioning activities report (PSDAR), an additional 20 percent may be used. A site-specific decommissioning cost estimate must be submitted to the NRC prior to the licensee using any funding in excess of these amounts.

In the absence of an exemption by the NRC, these provisions would restrict the ability of CEG to use the NDT for activities that are part of the larger decommissioning process prior to permanent cessation of operations at Braidwood, Byron, and LaSalle, even though activities that are part of the larger decommissioning process would reduce the level of radioactivity at Braidwood, Byron, and LaSalle and would not adversely impact the ability to fund future decommissioning.

Request for Exemption from 10 CFR 50.82(a)(8)(i) and (ii)

A request for an exemption from these requirements must satisfy the requirements of 10 CFR 50.12. As demonstrated below, this exemption request satisfies the provisions of 10 CFR 50.12.

In addition to providing the information requested by the NRC in the ISG, CEG has considered and addressed the concerns expressed by the staff in its 2020 proposal to deny the EnergySolutions¶ petition for rulemaking to allow for the use of decommissioning trust funds for the disposal of major radioactive components.2 Specifically, in recommending denial, the staff stated:

the staff envisions certain circumstances, which could be stated in an exemption request (a large projected excess in decommissioning trust funds compared to a site-specific cost estimate <<) that may lead to the approval of the particular request, based on the totality of the facts.

While the staff¶s statement was specific to proposed exemptions for disposal of major radioactive component, the condition that there be ³a large projected excess in decommissioning trust funds compared to a site-specific cost estimate' would seem to also apply to CEG¶s proposal for the funding of subaccounts. In the instance of this exemption request, CEG can affirm that there will be a large projected excess in each of the NDTs after establishing and funding subaccounts with earnings in excess of that credited by the NRC (2 percent) within Braidwood, Byron, and LaSalle¶s respective NDTs.

III.

Background

In the context of NRC¶s decommissioning funding requirements, CEG understands that it is NRC¶s position that depositing excess earnings from an NDT into a subaccount not dedicated to radiological decommissioning is a withdrawal not authorized under the rule. Therefore, NRC would not permit such withdrawals absent an exemption. Specifically, in 2023 PSEG provided notice to the NRC by letter that it intended to make changes to the PSEG Master Decommissioning Trust Agreement to create subaccounts into which excess decommissioning trust funds would be deposited.3 In its response to PSEG¶s notice, NRC stated that:

the earnings from funds originally dedicated for radiological decommissioning in a decommissioning trust fund, whether established under the prepayment method or otherwise, are restricted by the NRC¶s regulations at 10 CFR 50.82(a)(8)(i)(A) and 10 CFR 50.75(h)(1)(iv) to being withdrawn only for radiological decommissioning expenses, even when such earnings are claimed to be in excess of what is required for radiological decommissioning and are directed to subaccounts purporting to allow for other types of withdrawals.

NRC concluded by stating that ³PSEG would need to request and have approved an exemption, under 10 CFR 50.12, from the NRC¶s regulations at 10 CFR 50.82(a)(8)(i)(A) and 10 CFR 50.75(h)(1)(iv) in addition to amending the Trust Agreement.'4 2 SECY-20-0095, "Denial of Petition for Rulemaking to Access the Decommissioning Trust Fund for the Disposal of Large Components," U.S. Nuclear Regulatory Commission, p. 2, October 19, 2020. The Commission approved the staff¶s recommendation in Staff Requirements Memorandum (SRM) SECY-20-0095 (Dec. 23, 2021).

3 Letter from PSEG to NRC, ³Notice of Proposed Amendment to Decommissioning Trust Agreement' (Nov. 29, 2023)

(ML23252A001).

4 NRC Letter to PSEG Nuclear LLC (Nov. 29, 2023) (ML23270C007).

Request for Exemption from 10 CFR 50.82(a)(8)(i) and (ii)

Accordingly, CEG is submitting this exemption consistent with the NRC¶s statements.

In the Statements of Consideration for the 1996 amendments to its decommissioning regulations, the NRC received a comment requesting that ³The NRC should develop a << policy for operating plants and should allow licensees to withdraw decommissioning trust funds to dispose of structures and equipment no longer being used for operating plants.' In response, the NRC stated as follows:

The NRC has concluded that allowing decommissioning trust funds withdrawals for disposals by nuclear power plants that continue to operate is not warranted. These activities are more appropriately considered operating activities and should be financed that way5 This position is reflected in the NRC¶s regulations quoted above. Consequently, licensees have been precluded from using decommissioning trust funds for activities that are part of the larger decommissioning process.

The accumulating amounts of spent nuclear fuel and the ongoing lack of a federal repository for that fuel have resulted in the need for plant owners to store spent fuel in Independent Spent Fuel Storage Installations (ISFSIs) that was not anticipated when previous Treasury Department regulations were issued. Allowing funds to be used for activities that are part of the larger decommissioning process at any time during operations or decommissioning, such as transferring and safely storing spent fuel at the ISFSIs and decontamination, removal, and disposal of radioactive components, would more accurately reflect the current environment in which a permanent federal repository for spent fuel does not exist and CEG is required to provide long-term storage for spent fuel in the ISFSIs.

If the exemption is granted, funds deposited into the subaccounts from excess earnings could be allocated to pay for activities that are part of the larger decommissioning process and not restricted to radiological decommissioning. The subaccounts could be used to pay for

³decommissioning costs' as defined by the Treasury Department regulations implementing Section 468A of the Internal Revenue Code. Specifically, 26 CFR 1.468A-1, ³Nuclear decommissioning costs; general rules,' paragraph (b)(6) defines ³decommissioning costs' to include costs for radiological and non-radiological activities and certain spent fuel management activities whether the plant is operating or has permanently ceased operations. The practice of commingling funds in the NDT is generally permitted under NRC guidance as long as the licensee is able to identify and account for the funds dedicated to radiological decommissioning separately from funds set aside for other purposes. Only earnings above 2 percent from NDT funds would be used as a source of funds for the subaccounts.

IV.

Basis The NRC definition of "decommission" states that the entire reactor facility must be removed from service before related activities fall within NRC-sanctioned decommissioning (10 CFR 50.2). Further, when the NRC promulgated the decommissioning rule in 1988, it noted in the Statements of Consideration to the final rule that "[d]ecommissioning activities are initiated when a licensee decides to terminate licensed activities."6 If this exemption were 5 Final Rule, Decommissioning of Nuclear Power Reactors, 61 FR 39278, 39293; July 29, 1996.

6 Final Rule, Decommissioning Criteria for Nuclear Facilities, 53 FR 24,018, 24,019; June 27, 1988.

Request for Exemption from 10 CFR 50.82(a)(8)(i) and (ii) granted, CEG will perform activities that are part of the larger decommissioning process at any time during operations or decommissioning rather than waiting until the entire site is decommissioned. This is proposed to be accomplished using funds from the NDTs that were placed there for the purpose of removing such components. Absent this exemption, retired major components and irradiated hardware, would remain on site at each respective location until all units cease operation.

The regulatory history of the NRC¶s decommissioning regulations clearly contemplates the scenario proposed by CEG in this exemption request. The NRC¶s regulations and guidance have emphasized compliance with the minimum funding requirements of 10 CFR 50.75(c) by taking credit for future earnings from investments of NDT assets. However, to the extent that a licensee does not need to take credit for future earnings in order to meet the minimum compliance requirements, there is a sound regulatory basis for diverting future NDT earnings into an ³Excess Earnings Subaccount' within a qualified fund.

The most significant regulatory basis for doing this is the rulemaking history relating to NRC¶s 1988 rule. In the proposed rule, the NRC staff proposed including language that required

³accumulated earnings' to be included in either the ³prepayment' or ³external sinking fund' method. For the ³prepayment' method in the proposed 10 CFR 50.33(k)(2)(i), the proposed rule provided that the prepayment method involved a segregated account ³in an amount such that the principal plus accumulated earnings would be sufficient to pay decommissioning costs.'7 For the ³external sinking fund' method in the proposed 10 CFR 50.33(k)(2)(ii), the proposed rule provided establishment of a fund ³in which the total amount of the periodic deposits plus accumulated earnings would be sufficient to pay decommissioning costs at the time termination of operations is expected.' The words ³plus accumulated earnings' were deleted in the language ultimately adopted by the 1988 Final Rule in 10 CFR 50.75(e)(1)(i) &

50.75(e)(1)(ii).

In connection with the 1988 rulemaking, the NRC staff published its disposition of various comments to the proposed rule in NUREG-1221.8 Comment ³D 3.3.4 Prepayment' was reported as follows:

Comment Summary One commenter stated that if a licensee uses the prepayment method the accumulated earnings in the decommissioning fund will reach a level larger than required to reflect the annual adjustment for inflation because the proposed rule does not recognize that the accumulated earnings will consist of an inflation adjustment component, a pure interest rate component, and a premium-associated-with-risk component. The commenter recommended that the proposed rule be modified to permit a licensee to withdraw the pure interest rate component and the premium-associated-with-risk component periodically from the prepayment fund. (133). (emphasis added) 7 Proposed Rule, ³Decommissioning Criteria for Nuclear Facilities,' 50 FR 5600, 5618 (Feb. 11, 1985) (emphasis added).

8 NUREG-1221, ³Summary, Analysis and Response to Public Comments on Proposed Amendments to 10 CFR Part 30,' (ML18073A149).

Request for Exemption from 10 CFR 50.82(a)(8)(i) and (ii)

Comment Analysis and Response The amendments indicate that in prepayment, at the time of decommissioning, the funds are in such amount that the principal plus accumulated earnings would be sufficient to pay decommissioning costs. There is nothing in these requirements which is intended to prevent a licensee from making sure that the fund does not reach a level higher than required. Measures which licensees may take to prevent that occurrence are outside the scope of this rule. The rule has been modified to clarify this. (emphasis added)

Thus, the NRC staff specifically acknowledged that there could be ³excess' earnings from assets in an NDT that would not necessarily have to be dedicated to 10 CFR 50.75 purposes.

If a unit¶s existing NDT balance meets or exceeds the minimum funding requirement, there is no need to take credit for any earnings. Therefore, all earnings beyond the 2 percent assumed rate of return for the next year could be considered ³excess.'

A. Braidwood, Byron, and LaSalle Decommissioning Trust Funds

1. There are Large Projected Surpluses in the Decommissioning Trust Funds The NDTs at Braidwood, Byron, and LaSalle were originally established through ratepayer collections, which included amounts for spent fuel management, however, this money was commingled in the overall NDTs and not separately accounted. Collections ended in 2006, but the historical collection amounts in conjunction with the license renewal to 60 years has resulted in a robust funding level for Braidwood, Byron, and LaSalle.

Table 1 Summary of Annual SAFSTOR Decommissioning Cash Flow Analyses (2025 dollars)

Braidwood Unit 1 Braidwood Unit 2 Byron Unit 1 Byron Unit 2 LaSalle Unit 1 LaSalle Unit 2 12/31/2024 fund value ($M)

$498

$538

$545

$525

$737

$739 Permanent cessation of operations October 17, 2046 December 18, 2047 October 31, 2044 November 6, 2046 April 17, 2042 December 16, 2043 Projected funds at start of analysis using a 2 percent annual RROR ($M)

$725

$800

$763

$764

$992

$1,014 Radiological decommissioning cost (SSDCE) ($M)

$987

$998

$998

$1,006

$1,058

$1,059 Decommissioning period earnings using a 2 percent annual RROR ($M)

$1,038

$1,201

$1,111

$1,017

$1,696

$1,741 Projected surplus of funds at completion of decommissioning ($M)

$776

$1,002

$877

$775

$1,631

$1,696 Request for Exemption from 10 CFR 50.82(a)(8)(i) and (ii)

2. Time Period Before Commencement of Major Radiological Decommissioning Activities Table 2 Years Remaining Before Shutdown Braidwood Unit 1 Braidwood Unit 2 Byron Unit 1 Byron Unit 2 LaSalle Unit 1

LaSalle Unit 2

Permanent cessation of operations October 17, 2046 December 18, 2047 October 31, 2044 November 6, 2046 April 17, 2042 December 16, 2043 Years remaining to accumulate earnings before shutdown 20 22 19 21 16 18 As described above, the time period prior to commencement of decommissioning activities is sufficient to provide for the accumulation of funds to support license termination.

3. Status and Structure of the Decommissioning Trust Fund The funds for Braidwood, Byron, and LaSalle were originally collected from ratepayers through 2006. The original collections were based on radiological decommissioning and spent fuel management costs, but the funds were not segregated or accounted for separately in the NDT.

Hence, they have historically been commingled and not reported separately to the NRC, and are considered funds for radiological decommissioning.

4. Decommissioning Funding Assurance History As noted previously, the amounts previously collected and the additional time for funds to grow has resulted in a robust funding level for Braidwood Units 1 and 2, Byron Units 1 and 2, and LaSalle Units 1 and 2. Braidwood, Byron, and LaSalle show in all cases that the respective projected fund value exceeds the minimum formula amount. Subaccount funding is limited to earnings from funds dedicated for radiological decommissioning in excess of that allowed to be credited by the NRC (2 percent), thus maintaining a 2 percent margin.

Request for Exemption from 10 CFR 50.82(a)(8)(i) and (ii)

Table 3 Summary of Braidwood Funding Assurance History (2025 dollars)

Date Braidwood Unit 1 Braidwood Unit 2 Fund Value

($M)

Projected Fund Value on Shutdown ($M)

Minimum Formula Amount ($M)

Fund Value

($M)

Projected Fund Value on Shutdown ($M)

Minimum Formula Amount ($M) 12/31/2024

$498

$765

$559

$538

$847

$559 12/31/2022

$430

$689

$580

$464

$760

$580 12/31/2020

$433

$722

$524

$468

$798

$524 12/31/2018

$344

$597

$517

$373

$661

$517 12/31/2016

$322

$580

$492

$348

$642

$492 Table 4 Summary of Byron Funding Assurance History (2025 dollars)

Date Byron Unit 1 Byron Unit 2 Fund Value

($M)

Projected Fund Value on Shutdown ($M)

Minimum Formula Amount ($M)

Fund Value

($M)

Projected Fund Value on Shutdown ($M)

Minimum Formula Amount ($M) 12/31/2024

$545

$806

$559

$525

$808

$559 12/31/2022

$470

$723

$580

$454

$727

$580 12/31/2020

$475

$761

$524

$459

$765

$524 12/31/2018

$379

$631

$517

$365

$633

$517 12/31/2016

$354

$613

$492

$341

$615

$492 Table 5 Summary of LaSalle Funding Assurance History (2025 dollars)

Date LaSalle Unit 1 LaSalle Unit 2 Fund Value

($M)

Projected Fund Value on Shutdown ($M)

Minimum Formula Amount ($M)

Fund Value

($M)

Projected Fund Value on Shutdown ($M)

Minimum Formula Amount ($M) 12/31/2024

$737

$1,037

$697

$739

$1,074

$697 12/31/2022

$638

$934

$706

$635

$961

$706 12/31/2020

$641

$977

$675

$641

$1,009

$675 12/31/2018

$510

$808

$682

$511

$838

$682 12/31/2016

$477

$786

$652

$477

$813

$652 Request for Exemption from 10 CFR 50.82(a)(8)(i) and (ii)

5. Funding mechanisms to cover future shortfalls in the Decommissioning Trust Fund (for a merchant plant owner)

NRC regulations in 10 CFR 50.75(e) specify funding mechanisms that are acceptable for demonstrating financial assurance. Due to the current funding level of the Braidwood, Byron, and LaSalle NDTs, and continuing to credit fund growth anticipated under this exemption request, it is unlikely that any additional financial assurance would be required. In the unlikely event of a shortfall for Braidwood, Byron, and LaSalle, CEG would use one of the authorized methods to make up any shortfall that may occur, including but not limited to a parent company guarantee. CEG meets the financial test in 10 CFR 30 Appendix A for providing a parent company guarantee (see Attachment 14), and could also provide additional assurances using a letter of credit or surety bond if required.

6. Current Financial Health of CEG Pursuant to longstanding NRC financial qualification guidance under NUREG-1577, Revision 1, if an applicant "has an µinvestment grade¶ rating or equivalent from at least two of these sources

[Moody¶s Standard and Poors, and Value Line],<<the reviewer will find such applicant financially qualified". CEG maintains an investment grade credit rating with the S&P of BBB+ and Moody's of Baa1. It would require a three-notch downgrade from their current levels to BB+ and Ba1 to drop below an investment grade credit rating.

Historical financial information regarding CEG and its parent company is provided in its February 18, 2025 Form 10-K Annual Report filed with the Securities and Exchange Commission and available on the Internet at:

https://www.sec.gov/Archives/edgar/data/1868275/000186827525000023/ceg-20241231.htm See pages 85-94.

B. The Site-Specific Decommissioning Cost Estimate

1. The Site-Specific Decommissioning Cost Estimate Is Comprehensive The NRC requires in 10 CFR 50.75(f)(2) that each licensee prepare and submit a DCE at least five years prior to the projected end of operations. CEG already has in place a detailed, site-specific DCE even though operations are not expected to cease for at least sixteen years. The most recent DCE is comprehensive; the total estimated costs include spent fuel management and site restoration in 2025 dollars based on the SAFSTOR scenario. License termination cost is also in 2025 dollars that includes just plant and Independent Spent Fuel Storage Installation (ISFSI) license termination.

Request for Exemption from 10 CFR 50.82(a)(8)(i) and (ii)

Table 6 Summary of Site-Specific Decommissioning Cost Estimate (2025 dollars)

Total Estimated Cost ($M)

License Termination Cost

($M)

Braidwood 1

$1,297

$987 Braidwood 2

$1,338

$998 Byron 1

$1,310

$998 Byron 2

$1,349

$1,006 LaSalle 1

$1,382

$1,058 LaSalle 2

$1,406

$1,059 The site-specific estimate considers the lessons learned and industry experience gained from the decommissioning of several nuclear power plants in recent years. These plants include the completed projects at Maine Yankee, Connecticut Yankee, Yankee Rowe, Trojan, and Big Rock Point. Although some of those projects exceeded projected costs, the experience has led to improvements in the ability to prepare DCEs that address all costs. For example, the Zion Nuclear Power Station, where all physical decommissioning work has been completed, will be decommissioned for significantly less than the DCE that was prepared and submitted to the NRC. In addition, decommissioning projects that are underway at Vermont Yankee, Oyster Creek, and Pilgrim also are projected to be completed for less than estimated.

In particular, contemporary DCEs, including the one for Braidwood, Byron, and LaSalle, account for the significant lessons learned in the segmentation and disposal of reactor pressure vessels.

The uncertainty with these projects has historically been very high, both in terms of the cost to complete the work and the estimate of the volume and class of low-level radioactive waste (LLW) generated.

Significant progress has been made in the ability to reduce the generation of Greater than Class C Waste (GTCC), which must be stored onsite in the ISFSI.

In addition, the DCEs include detailed staffing models based on recent experience and include activity-based contingency based on the complexity and uncertainty of each activity. The DCEs are consistent with industry standards as described in AIF/NESP036, Guidelines for Producing Commercial Nuclear Power Plant Decommissioning Cost Estimates," and NRC Regulatory Guide 1.202, "Standard Format and Content of Decommissioning Cost Estimates for Nuclear Power Reactors," February 2005.

2. The Site-Specific Decommissioning Cost Estimate Is Reliable The DCE contains a thorough and comprehensive analysis of the anticipated costs of decommissioning. Previous decommissioning projects provide ample evidence that it is reasonable to rely on the DCE. Data for the three large PWRs that have been fully demolished Request for Exemption from 10 CFR 50.82(a)(8)(i) and (ii)

(i.e., Connecticut Yankee, Maine Yankee, and Trojan) show that final decommissioning costs were less than projected in the DCE for two (Maine Yankee and Trojan) and 24 percent higher for Connecticut Yankee. These data indicate that the DCEs are reliable planning tools.

Furthermore, the difference in the case of Connecticut Yankee is now well understood.

Additional completed reactor decommissioning projects have continued to prove the reasonableness of DCEs.

One key reason that Connecticut Yankee stands out as an exception is that it entered the decommissioning process following an unplanned shutdown. The lack of planning was a key factor in the challenges that the project faced. Decommissioning planning is another area that has proven to show significant benefits in recent years. The Decommissioning Planning costs are also included in the most recent DCE. These lessons are useful even in the event of an unplanned shutdown and have been applied at the current generation of nuclear power plants undergoing decommissioning.

C. Withdrawal of Funds Now From the NDT Will Not Jeopardize CEG¶s Ability to Fully Decommission Braidwood, Byron, and LaSalle

1. There Will Be Sufficient Funds Available To Decommission Braidwood, Byron, and LaSalle The NDT provides adequate assurance that funds will be available throughout the decommissioning period. As noted above, NDT balances for Braidwood Units 1 and 2 reported for the end of calendar year 2024 were approximately $498 and $538 million, Byron Units 1 and 2 reported for the end of calendar year 2024 were approximately $545 and

$525 million, LaSalle Units 1 and 2 reported for the end of calendar year 2024 were approximately $737 and $739 million, respectively. These balances will continue to grow because only earnings above 2 percent on the NDT funds would be used as a source of funds for the subaccounts. The first 2 percent of earnings will remain in the NDTs.

Table 7 Summary of Most Recent Funding Assurance (2025 dollars)

Fund Value as of 12/31/2024 ($M)

Projected Fund Value on Shutdown w/ 2 percent annual RROR ($M)

Minimum Formula Amount as of 12/31/2024 ($M)

Braidwood 1

$498

$765

$559 Braidwood 2

$538

$847

$559 Byron 1

$545

$806

$559 Byron 2

$525

$808

$559 LaSalle 1

$737

$1,037

$697 LaSalle 2

$739

$1,074

$697 Request for Exemption from 10 CFR 50.82(a)(8)(i) and (ii)

2. The Withdrawal Will Not Reduce The Value Of The Decommissioning Trust Below An Amount Necessary To Place And Maintain The Reactor In A Safe Storage Condition If Unforeseen Conditions Or Expenses Arise (10 CFR 50.82(a)(8)(i)(B))

The use of NDT for the requested purpose will not reduce its value below an amount necessary to place and maintain the reactor in a safe storage condition. The NDT balances will continue to exceed the NRC minimum requirements for financial assurance for decommissioning and be considered fully funded for purposes of compliance with NRC¶s rules. Even with the requested transfer, CEG not only has sufficient funds to place and maintain the reactor in a safe storage condition, but CEG expects to have more than sufficient funds to complete the NRC-required radiological decommissioning based on the site-specific DCE as shown in Attachments 2 through 13. Subaccount funding is limited to earnings from funds dedicated for radiological decommissioning in excess of that allowed to be credited by the NRC (2 percent).

3. The Withdrawal Will Not Inhibit The Ability Of CEG To Complete Funding Of Any Shortfalls In The Decommissioning Trust Needed To Ensure The Availability Of Funds To Ultimately Release The Site And Terminate The License (10 CFR 50.82(a)(8)(i)(C))

The expenditure of NDT funds would not inhibit the ability of CEG to complete funding of any shortfalls in the NDTs needed to ensure the availability of funds to ultimately release the site and terminate the license. CEG proposes funding subaccounts only with trust earnings in excess of 2 percent, the remaining funds in the trusts exceed the NRC¶s minimum funding requirements in accordance with 10 CFR 50.75.

V.

Justification of Exemption and Special Circumstances 10 CFR 50.12, "Specific Exemptions," states that the NRC may grant exemptions from the requirements of the regulations in 10 CFR Part 50 if three conditions are met. The three conditions are: 1) the exemption is authorized by law, 2) the exemption will not present an undue risk to the public health and safety, and 3) the exemption is consistent with the common defense and security. In addition, section 50.12 provides that the NRC will not consider granting an exemption unless special circumstances are present.

A. The Requested Exemption is Authorized by Law This exemption is authorized by law in accordance with 10 CFR 50.12(a)(1). No law exists that precludes the activities covered by this exemption request. The provisions of 10 CFR 50.82 as well as the definition of "decommission" at 10 CFR 50.2 were adopted at the discretion of the NRC consistent with its statutory authority. No statute required the NRC to adopt the specific regulations from which CEG now seeks an exemption. Rather, it is entirely within the NRC¶s discretion to determine that alternative means are adequate to provide reasonable assurance of adequate protection of safety.

Request for Exemption from 10 CFR 50.82(a)(8)(i) and (ii)

B. The Requested Exemption Does Not Present an Undue Risk to the Public Health and Safety This exemption will not present an undue risk to the public health and safety. To the contrary, granting this exemption will result in increasing the protection to the public health and safety as a significant source term will be removed from the site and properly disposed of decades in advance of the time of these activities that are part of the larger decommissioning process if CEG waited until the reactors cease operation. This will reduce the potential for exposures from this source.

C. The Requested Exemption Will Not Endanger the Common Defense and Security This exemption is consistent with the common defense and security because it removes a source term from the site sooner than would otherwise be the case without the exemption.

D. Special Circumstances NRC regulations require that special circumstances be present in order to grant an exemption.

This exemption is justified based on three of the six special circumstances cited in the regulations. The following special circumstances from 10 CFR 50.12(a)(2) are present that warrant the granting of this exemption request:

1. The Regulation In The Particular Circumstances Conflicts With Other Rules Or Requirements Of The Commission (10 CFR 50.12(a)(2)(i))

In this particular circumstance, application of the regulations in 10 CFR 50.82(a) is in conflict with the philosophy underlying the approach the Commission has taken for expeditiously removing contamination. It is inconsistent with the timeliness requirements set up for materials licensees as it may provide an unnecessary economic barrier for the removal of source terms from reactor sites. Material licensees of the NRC are subject to the 1994 Decommissioning Timeliness Rule, 10 CFR 30.36, 40.42, 70.38, and 72.54, which requires licensees to decontaminate and decommission certain unused portions of operating nuclear materials facilities.

Allowing contaminated land, buildings, or equipment to remain on site was seen as a possible public and environmental liability and the Commission looked for ways to achieve early decommissioning of unused portions of materials facilities, absent any other operational or safety concerns that would increase the risk to the site. For valid and sound reasons, reactor licensees are not subject to this rule and, in fact, are allowed the SAFSTOR option under 10 CFR 50.82. Nevertheless, in this case, absent the requested exemption, the requirement creates an economic barrier for the Licensee, who seeks to make a prudent decision to remove a source term from the site.

In addition, granting an exemption to the regulations in 10 CFR 50.82(a) would be consistent with the philosophy underlying the approach the Commission took for the license termination rule.9 In 1997, for instance, NRC originally added 10 CFR 20.1406(a) which requires that 9 Final Rule, Radiological Criteria for License Termination, 62 Fed. Reg. 39058 (July 21, 1997).

Request for Exemption from 10 CFR 50.82(a)(8)(i) and (ii)

³Applicants for licenses, other than renewals, after August 20, 1997, shall describe in the application how facility design and procedures for operation will minimize, to the extent practicable, contamination of the facility and the environment, facilitate eventual decommissioning, and minimize to the extent practicable, the generation of radioactive waste.'

More recently, in 2011, NRC further amended the license termination regulations to explicitly include an obligation to licensees during operations.10 Section 10 CFR 20.1406(c) requires that:

³Licensees shall, to the extent practical, conduct operations to minimize the introduction of residual radioactivity into the site, including the subsurface, in accordance with the existing radiation protection requirements in subpart B and radiological criteria for license termination in subpart E of this part.'11 The NRC added this provision related to operations because, in its view, ³[t]he ALARA requirements in existing regulations do not explicitly address subsurface contamination and do not provide adequate assurance that additional legacy sites will be prevented. Before this final rule, the NRC regulations did not explicitly specify licensees' obligations to survey subsurface contamination, nor did the regulations explicitly specify the requirement of licensees to conduct operations to minimize residual radioactivity at the site, including the subsurface.' Therefore, the overarching intent of 10 CFR 20.1406 is to minimize the occurrence and severity of site contamination by proactively taking measures that will control contamination and facilitate eventual decommissioning. Consistent with this philosophy, these activities that are part of the larger decommissioning process would comply with the Commission¶s intent under 10 CFR 20.1406.

In contrast, the storage of any retired major components and irradiated hardware at Braidwood, Byron, and LaSalle until permanent cessation of operations will increase the complexity of decommissioning and volume of waste to be disposed at the end of plant life. Moreover, this complexity will be exacerbated by the inventory of retired major components and irradiated hardware, stored onsite at other plants. Thus, permitting these activities that are part of the larger decommissioning process will reduce the inventory of waste material and eliminate this future decommissioning activity, consistent with the philosophy underlying 10 CFR 20.1406.

Nuclear reactor licensees, though not required to do so, should be permitted to utilize NDTs that are intended to cover the removal expense in advance of cessation of operations when such components no longer have a useful purpose. Early removal also could take advantage of the current favorable disposal pricing. However, without an exemption such items could remain on site for additional decades, particularly given current trends towards license renewal.

2. Application Of The Regulation In The Particular Circumstances Would Not Serve The Underlying Purpose Of The Rule Or Is Not Necessary To Achieve The Underlying Purpose Of The Rule (10 CFR 50.12(a)(2)(ii))

The underlying purpose of the rule is to provide adequate funds for ultimate decommissioning of the site. The application of the regulation restricts the expenditure of NDTs in this circumstance, which is unnecessary to achieve the underlying purpose of the rule. The purpose of the 10 Final Rule, Decommissioning Planning, 76 Fed. Reg. 35512 (June 17, 2011).

Request for Exemption from 10 CFR 50.82(a)(8)(i) and (ii) restrictions on fund withdrawal is to protect the health and safety of the public by assuring that there will be adequate funds available to complete NRC-required decommissioning activities following termination of the operating license. The above analysis of the site-specific DCE and the NDT demonstrates that funding will be adequate to complete decommissioning even if funds are withdrawn for activities that are part of the larger decommissioning process during operations. It is noteworthy that a licensee can exceed the three (3) and 20 percent limitations of 10 CFR 50.82(a)(8)(ii) if a site-specific DCE is submitted to the NRC. Once this cost estimate is provided to the NRC, the licensee, according to the 1996 Statements of Consideration, may withdraw funds without obtaining additional approvals from the NRC.12 Since the cash flow analysis from CEG¶s site-specific DCE is being submitted with this exemption request, NRC has the information that is needed to assess the requirements of 10 CFR 50.82(a)(8)(ii) before CEG exceeds the limitations.

As noted above, it is prudent from both the safety and economic sense to use funds from the NDT for activities that are part of the larger decommissioning process. Permitting this will reduce the inventory of waste material and eliminate this from the decommissioning activities at the end of plant life. The underlying purpose is also to protect the environment; delaying removal would be counterproductive for this underlying purpose.

Furthermore, it is clear from the regulatory history of the NRC¶s decommissioning funding rules that the proposed exemption would be consistent with the original intent of the rule. As explained above, when NRC originally issued the decommissioning funding requirements in 1988, it made clear that ³There is nothing in these requirements which is intended to prevent a licensee from making sure that the fund does not reach a level higher than required.'

3. The Exemption Would Result In Benefit To The Public Health And Safety That Compensates For Any Decrease In Safety That May Result From The Grant Of The Exemption (10 CFR 50.12(a)(2)(iv))

The exemption would result in benefit to the public health and safety because these activities that are part of the larger decommissioning process support efforts to ultimately achieve unrestricted release of Braidwood, Byron, and LaSalle, thus improving environmental conditions.

Furthermore, there is no associated decrease in safety. Allowing the exemption will result in a net benefit to the public health and safety. Disposing of waste prior to the permanent cessation of operations is consistent with NRC policy to minimize the costs and complexity of decommissioning, which can only improve safety at the site.

VI.

Conclusion Granting this exemption will be consistent with the NRC decommissioning regulations as it: (1) would not eliminate the potential for unrestricted site release; (2) would not have a significant environmental impact not previously considered in Environmental Impact Statements, and (3) would not decrease reasonable assurance that adequate funds will be available for decommissioning. Conversely, the exemption would support efforts to achieve unrestricted 12 61 FR 39278, 39285; July 29, 1996.

Request for Exemption from 10 CFR 50.82(a)(8)(i) and (ii) release, improve environmental conditions as a result, and increase the effectiveness of the decommissioning fund for unrestricted release of the site.

In sum, it will facilitate the larger decommissioning process from the sites so that: (1) the inventory of radioactive waste and the associated source term at Braidwood, Byron, and LaSalle will be reduced; (2) the costs associated with maintaining any retired major components and irradiated hardware on site and providing protection to workers can be avoided; (3) the overall cost to decommission the site will be reduced; (4) any uncertainty regarding future disposal cost and capacity is eliminated; and (5) adequate funds will be available to decommission Braidwood, Byron, and LaSalle at the time the reactor ceases operation. Finally, the adequacy of the availability of funds for Braidwood, Byron, and LaSalle decommissioning is supported by a site-specific Decommissioning Cost Estimate and the associated funding program.

Decommissioning Cash Flow Analysis for Braidwood, Unit 1 SAFSTOR Radiological

Table 8 Decommissioning Cash Flow Analysis for Braidwood Unit 1 +/- SAFSTOR Radiological (thousands of 2025 dollars)

Year Radiological Decommissioning Cost ISFSI Decommissioning Cost Total Cost (a)

BOY Trust Fund Value BOY Trust Fund Less Cost Trust Fund Earnings(b)

EOY Trust Fund Value (a) 2044 724 724 724,845 724,121 14,482 738,603 2045 3,438 3,438 738,603 735,166 14,703 749,869 2046 9,614 9,614 749,869 740,255 14,805 755,060 2047 39,335 39,335 755,060 715,725 14,314 730,039 2048 49,717 49,717 730,039 680,322 13,606 693,929 2049 46,095 46,095 693,929 647,834 12,957 660,790 2050 40,193 40,193 660,790 620,597 12,412 633,009 2051 36,324 36,324 633,009 596,685 11,934 608,619 2052 29,103 29,103 608,619 579,516 11,590 591,106 2053 10,108 10,108 591,106 580,999 11,620 592,619 2054 4,572 4,572 592,619 588,046 11,761 599,807 2055 4,572 4,572 599,807 595,235 11,905 607,139 2056 4,572 4,572 607,139 602,567 12,051 614,618 2057 4,585 4,585 614,618 610,034 12,201 622,234 2058 4,572 4,572 622,234 617,662 12,353 630,015 2059 4,572 4,572 630,015 625,443 12,509 637,951 2060 4,572 4,572 637,951 633,379 12,668 646,047 2061 4,585 4,585 646,047 641,462 12,829 654,291 2062 4,572 4,572 654,291 649,719 12,994 662,713 2063 4,572 4,572 662,713 658,141 13,163 671,303 2064 4,572 4,572 671,303 666,731 13,335 680,066 2065 4,585 4,585 680,066 675,481 13,510 688,990 2066 4,572 4,572 688,990 684,418 13,688 698,106 2067 4,572 4,572 698,106 693,534 13,871 707,405 2068 4,572 4,572 707,405 702,832 14,057 716,889 2069 4,585 4,585 716,889 712,304 14,246 726,550 2070 4,572 4,572 726,550 721,978 14,440 736,417 2071 4,542 4,542 736,417 731,876 14,638 746,513 2072 4,451 4,451 746,513 742,062 14,841 756,904 2073 4,463 4,463 756,904 752,441 15,049 767,490 2074 4,451 4,451 767,490 763,039 15,261 778,300 2075 4,451 4,451 778,300 773,849 15,477 789,326 2076 4,451 4,451 789,326 784,876 15,698 800,573 2077 4,937 4,937 800,573 795,637 15,913 811,549 2078 4,923 4,923 811,549 806,626 16,133 822,759 2079 4,923 4,923 822,759 817,835 16,357 834,192 2080 4,923 4,923 834,192 829,269 16,585 845,854

Table 8 Decommissioning Cash Flow Analysis for Braidwood Unit 1 +/- SAFSTOR Radiological (thousands of 2025 dollars)

Year Radiological Decommissioning Cost ISFSI Decommissioning Cost Total Cost (a)

BOY Trust Fund Value BOY Trust Fund Less Cost Trust Fund Earnings(b)

EOY Trust Fund Value (a) 2081 4,937 4,937 845,854 840,917 16,818 857,736 2082 4,923 4,923 857,736 852,812 17,056 869,869 2083 4,923 4,923 869,869 864,945 17,299 882,244 2084 4,923 4,923 882,244 877,321 17,546 894,867 2085 4,937 4,937 894,867 889,930 17,799 907,729 2086 4,923 4,923 907,729 902,806 18,056 920,862 2087 4,923 4,923 920,862 915,939 18,319 934,257 2088 4,923 4,923 934,257 929,334 18,587 947,921 2089 4,937 4,937 947,921 942,984 18,860 961,844 2090 4,923 4,923 961,844 956,920 19,138 976,059 2091 4,923 4,923 976,059 971,135 19,423 990,558 2092 4,923 4,923 990,558 985,635 19,713 1,005,347 2093 4,937 4,937 1,005,347 1,000,411 20,008 1,020,419 2094 4,923 4,923 1,020,419 1,015,496 20,310 1,035,805 2095 4,923 4,923 1,035,805 1,030,882 20,618 1,051,500 2096 4,923 4,923 1,051,500 1,046,576 20,932 1,067,508 2097 4,937 4,937 1,067,508 1,062,571 21,251 1,083,823 2098 4,923 4,923 1,083,823 1,078,899 21,578 1,100,477 2099 26,429 26,429 1,100,477 1,074,049 21,481 1,095,530 2100 68,581 68,581 1,095,530 1,026,949 20,539 1,047,488 2101 88,434 88,434 1,047,488 959,054 19,181 978,235 2102 88,192 88,192 978,235 890,044 17,801 907,844 2103 88,192 88,192 907,844 819,652 16,393 836,045 2104 62,114 62,114 836,045 773,932 15,479 789,410 2105 59,220 7,931 67,151 789,410 722,259 14,445 736,705 2106 19,421 498 19,919 736,705 716,786 14,336 731,122 2107 731,122 731,122 14,622 745,744 2108 745,744 745,744 14,915 760,659 2109 760,659 760,659 15,213 775,872 Totals(a) 978,213 8,429 986,642 (a) Cash flows may not add due to rounding (b) A 2 percent real rate of return is used as allowed by 10 CFR 50.75(e)(1)(i)

Decommissioning Cash Flow Analysis for Braidwood, Unit 2 SAFSTOR Radiological

Table 9 Decommissioning Cash Flow Analysis for Braidwood Unit 2 +/- SAFSTOR Radiological (thousands of 2025 dollars)

Year Radiological Decommissioning Cost ISFSI Decommissioning Cost Total Cost(a)

BOY Trust Fund Value BOY Trust Fund Less Cost Trust Fund Earnings(b)

EOY Trust Fund Value(a) 2045 139 139 799,664 799,525 15,990 815,515 2046 3,391 3,391 815,515 812,124 16,242 828,367 2047 3,472 3,472 828,367 824,894 16,498 841,392 2048 70,429 70,429 841,392 770,963 15,419 786,382 2049 55,917 55,917 786,382 730,466 14,609 745,075 2050 42,500 42,500 745,075 702,575 14,051 716,626 2051 38,630 38,630 716,626 677,996 13,560 691,556 2052 31,410 31,410 691,556 660,146 13,203 673,349 2053 10,736 10,736 673,349 662,613 13,252 675,865 2054 4,693 4,693 675,865 671,172 13,423 684,595 2055 4,693 4,693 684,595 679,902 13,598 693,500 2056 4,693 4,693 693,500 688,806 13,776 702,583 2057 4,706 4,706 702,583 697,876 13,958 711,834 2058 4,693 4,693 711,834 707,140 14,143 721,283 2059 4,693 4,693 721,283 716,590 14,332 730,922 2060 4,693 4,693 730,922 726,228 14,525 740,753 2061 4,706 4,706 740,753 736,047 14,721 750,767 2062 4,693 4,693 750,767 746,074 14,921 760,996 2063 4,693 4,693 760,996 756,302 15,126 771,428 2064 4,693 4,693 771,428 766,735 15,335 782,069 2065 4,706 4,706 782,069 777,363 15,547 792,910 2066 4,693 4,693 792,910 788,217 15,764 803,981 2067 4,693 4,693 803,981 799,288 15,986 815,274 2068 4,693 4,693 815,274 810,580 16,212 826,792 2069 4,706 4,706 826,792 822,086 16,442 838,527 2070 4,693 4,693 838,527 833,834 16,677 850,511 2071 4,663 4,663 850,511 845,848 16,917 862,765 2072 4,572 4,572 862,765 858,193 17,164 875,357 2073 4,584 4,584 875,357 870,773 17,415 888,188 2074 4,572 4,572 888,188 883,617 17,672 901,289 2075 4,572 4,572 901,289 896,718 17,934 914,652 2076 4,572 4,572 914,652 910,080 18,202 928,282 2077 5,058 5,058 928,282 923,224 18,464 941,688 2078 5,044 5,044 941,688 936,644 18,733 955,377 2079 5,044 5,044 955,377 950,332 19,007 969,339 2080 5,044 5,044 969,339 964,295 19,286 983,581 2081 5,058 5,058 983,581 978,523 19,570 998,093

Table 9 Decommissioning Cash Flow Analysis for Braidwood Unit 2 +/- SAFSTOR Radiological (thousands of 2025 dollars)

Year Radiological Decommissioning Cost ISFSI Decommissioning Cost Total Cost(a)

BOY Trust Fund Value BOY Trust Fund Less Cost Trust Fund Earnings(b)

EOY Trust Fund Value(a) 2082 5,044 5,044 998,093 993,049 19,861 1,012,910 2083 5,044 5,044 1,012,910 1,007,865 20,157 1,028,023 2084 5,044 5,044 1,028,023 1,022,978 20,460 1,043,438 2085 5,058 5,058 1,043,438 1,038,380 20,768 1,059,147 2086 5,044 5,044 1,059,147 1,054,103 21,082 1,075,185 2087 5,044 5,044 1,075,185 1,070,141 21,403 1,091,543 2088 5,044 5,044 1,091,543 1,086,499 21,730 1,108,229 2089 5,058 5,058 1,108,229 1,103,171 22,063 1,125,234 2090 5,044 5,044 1,125,234 1,120,190 22,404 1,142,594 2091 5,044 5,044 1,142,594 1,137,549 22,751 1,160,300 2092 5,044 5,044 1,160,300 1,155,256 23,105 1,178,361 2093 5,058 5,058 1,178,361 1,173,303 23,466 1,196,769 2094 5,044 5,044 1,196,769 1,191,725 23,834 1,215,559 2095 5,044 5,044 1,215,559 1,210,515 24,210 1,234,725 2096 5,044 5,044 1,234,725 1,229,681 24,594 1,254,274 2097 5,058 5,058 1,254,274 1,249,216 24,984 1,274,201 2098 5,044 5,044 1,274,201 1,269,156 25,383 1,294,539 2099 26,550 26,550 1,294,539 1,267,990 25,360 1,293,349 2100 66,582 66,582 1,293,349 1,226,767 24,535 1,251,303 2101 84,844 84,844 1,251,303 1,166,459 23,329 1,189,788 2102 84,612 84,612 1,189,788 1,105,175 22,104 1,127,279 2103 84,612 84,612 1,127,279 1,042,667 20,853 1,063,520 2104 74,853 74,853 1,063,520 988,667 19,773 1,008,440 2105 72,658 7,931 80,589 1,008,440 927,851 18,557 946,408 2106 20,086 498 20,583 946,408 925,825 18,516 944,341 2107

- 944,341 944,341 18,887 963,228 2108

- 963,228 963,228 19,265 982,493 2109

- 982,493 982,493 19,650 1,002,143 Totals(a) 989,854 8,429 998,282 (a) Cash flows may not add due to rounding (b) A 2 percent real rate of return is used as allowed by 10 CFR 50.75(e)(1)(i)

Decommissioning Cash Flow Analysis for Braidwood, Unit 1 SAFSTOR Total

Table 10 Decommissioning Cash Flow Analysis for Braidwood Unit 1 +/- SAFSTOR Total (thousands of 2025 dollars)

Year Radiological Decommissioning Cost ISFSI Decommissioning Cost Spent Fuel Management Cost Site Restoration Cost Total Cost (a)

BOY Trust Fund Value BOY Trust Fund Less Cost Trust Fund Earnings(b)

EOY Trust Fund Value (a) 2044 724 724 724,845 724,121 14,482 738,603 2045 3,438 3,438 738,603 735,166 14,703 749,869 2046 9,614 11,158 12 20,784 749,869 729,085 14,582 743,666 2047 39,335 66,721 72 106,128 743,666 637,539 12,751 650,290 2048 49,717 13,267 29 63,012 650,290 587,277 11,746 599,023 2049 46,095 2,336 20 48,451 599,023 550,572 11,011 561,583 2050 40,193 2,386 20 42,599 561,583 518,984 10,380 529,364 2051 36,324 23,065 20 59,409 529,364 469,955 9,399 479,354 2052 29,103 23,065 20 52,188 479,354 427,166 8,543 435,709 2053 10,108 2,336 96 12,539 435,709 423,170 8,463 431,633 2054 4,572 2,329 6,902 431,633 424,732 8,495 433,226 2055 4,572 2,329 6,902 433,226 426,325 8,526 434,851 2056 4,572 2,329 6,902 434,851 427,950 8,559 436,508 2057 4,585 2,336 6,921 436,508 429,588 8,592 438,180 2058 4,572 2,329 6,902 438,180 431,278 8,626 439,904 2059 4,572 2,329 6,902 439,904 433,002 8,660 441,662 2060 4,572 2,329 6,902 441,662 434,760 8,695 443,455 2061 4,585 2,336 6,921 443,455 436,535 8,731 445,266 2062 4,572 2,329 6,902 445,266 438,364 8,767 447,131 2063 4,572 2,329 6,902 447,131 440,229 8,805 449,034 2064 4,572 2,329 6,902 449,034 442,132 8,843 450,975 2065 4,585 2,336 6,921 450,975 444,054 8,881 452,936 2066 4,572 2,329 6,902 452,936 446,034 8,921 454,955 2067 4,572 2,329 6,902 454,955 448,053 8,961 457,014 2068 4,572 2,329 6,902 457,014 450,112 9,002 459,114 2069 4,585 2,336 6,921 459,114 452,194 9,044 461,238 2070 4,572 2,329 6,902 461,238 454,336 9,087 463,423 2071 4,542 3,104 7,646 463,423 455,777 9,116 464,893 2072 4,451 5,402 9,852 464,893 455,040 9,101 464,141 2073 4,463 5,416 9,879 464,141 454,262 9,085 463,347 2074 4,451 5,402 9,852 463,347 453,495 9,070 462,565 2075 4,451 5,402 9,852 462,565 452,713 9,054 461,767 2076 4,451 5,402 9,852 461,767 451,915 9,038 460,953 2077 4,937 4,937 460,953 456,017 9,120 465,137 2078 4,923 4,923 465,137 460,214 9,204 469,418 2079 4,923 4,923 469,418 464,495 9,290 473,784 2080 4,923 4,923 473,784 468,861 9,377 478,238

Table 10 Decommissioning Cash Flow Analysis for Braidwood Unit 1 +/- SAFSTOR Total (thousands of 2025 dollars)

Year Radiological Decommissioning Cost ISFSI Decommissioning Cost Spent Fuel Management Cost Site Restoration Cost Total Cost (a)

BOY Trust Fund Value BOY Trust Fund Less Cost Trust Fund Earnings(b)

EOY Trust Fund Value (a) 2081 4,937 4,937 478,238 473,302 9,466 482,768 2082 4,923 4,923 482,768 477,844 9,557 487,401 2083 4,923 4,923 487,401 482,478 9,650 492,127 2084 4,923 4,923 492,127 487,204 9,744 496,948 2085 4,937 4,937 496,948 492,011 9,840 501,852 2086 4,923 4,923 501,852 496,928 9,939 506,867 2087 4,923 4,923 506,867 501,944 10,039 511,982 2088 4,923 4,923 511,982 507,059 10,141 517,200 2089 4,937 4,937 517,200 512,264 10,245 522,509 2090 4,923 4,923 522,509 517,585 10,352 527,937 2091 4,923 4,923 527,937 523,014 10,460 533,474 2092 4,923 4,923 533,474 528,551 10,571 539,122 2093 4,937 4,937 539,122 534,185 10,684 544,869 2094 4,923 4,923 544,869 539,945 10,799 550,744 2095 4,923 4,923 550,744 545,821 10,916 556,737 2096 4,923 4,923 556,737 551,814 11,036 562,850 2097 4,937 4,937 562,850 557,914 11,158 569,072 2098 4,923 4,923 569,072 564,149 11,283 575,432 2099 26,429 55 26,484 575,432 548,948 10,979 559,927 2100 68,581 1,367 69,948 559,927 489,979 9,800 499,779 2101 88,434 2,322 90,755 499,779 409,024 8,180 417,204 2102 88,192 2,315 90,507 417,204 326,697 6,534 333,231 2103 88,192 2,315 90,507 333,231 242,723 4,854 247,578 2104 62,114 3,572 65,686 247,578 181,892 3,638 185,530 2105 59,220 7,931 3,626 70,777 185,530 114,753 2,295 117,048 2106 19,421 498 6,419 26,337 117,048 90,711 1,814 92,525 2107 30,447 30,447 92,525 62,078 1,242 63,320 2108 30,447 30,447 63,320 32,873 657 33,530 2109 12,946 12,946 33,530 20,584 412 20,996 Totals (a) 978,213 8,429 214,084 96,119 1,296,844 (a) Cash flows may not add due to rounding (b) A 2 percent real rate of return is used as allowed by 10 CFR 50.75(e)(1)(i)

Decommissioning Cash Flow Analysis for Braidwood, Unit 2 SAFSTOR Total

Table 11 Decommissioning Cash Flow Analysis for Braidwood Unit 2 +/- SAFSTOR Total (thousands of 2025 dollars)

Year Radiological Decommissioning Cost ISFSI Decommissioning Cost Spent Fuel Management Cost Site Restoration Cost Total Cost(a)

BOY Trust Fund Value BOY Trust Fund Less Cost Trust Fund Earnings(b)

EOY Trust Fund Value(a) 2045 139 139 799,664 799,525 15,990 815,515 2046 3,391 3,391 815,515 812,124 16,242 828,367 2047 3,472 3,472 828,367 824,894 16,498 841,392 2048 70,429 66,864 72 137,365 841,392 704,027 14,081 718,108 2049 55,917 23,899 42 79,857 718,108 638,251 12,765 651,016 2050 42,500 2,329 26 44,856 651,016 606,161 12,123 618,284 2051 38,630 23,094 26 61,750 618,284 556,534 11,131 567,664 2052 31,410 23,094 26 54,529 567,664 513,135 10,263 523,397 2053 10,736 2,336 96 13,168 523,397 510,229 10,205 520,434 2054 4,693 2,329 7,023 520,434 513,411 10,268 523,680 2055 4,693 2,329 7,023 523,680 516,657 10,333 526,990 2056 4,693 2,329 7,023 526,990 519,967 10,399 530,367 2057 4,706 2,336 7,042 530,367 523,325 10,466 533,791 2058 4,693 2,329 7,023 533,791 526,768 10,535 537,304 2059 4,693 2,329 7,023 537,304 530,281 10,606 540,887 2060 4,693 2,329 7,023 540,887 533,864 10,677 544,541 2061 4,706 2,336 7,042 544,541 537,499 10,750 548,249 2062 4,693 2,329 7,023 548,249 541,227 10,825 552,051 2063 4,693 2,329 7,023 552,051 545,028 10,901 555,929 2064 4,693 2,329 7,023 555,929 548,906 10,978 559,884 2065 4,706 2,336 7,042 559,884 552,842 11,057 563,899 2066 4,693 2,329 7,023 563,899 556,877 11,138 568,014 2067 4,693 2,329 7,023 568,014 560,991 11,220 572,211 2068 4,693 2,329 7,023 572,211 565,188 11,304 576,492 2069 4,706 2,336 7,042 576,492 569,450 11,389 580,839 2070 4,693 2,329 7,023 580,839 573,817 11,476 585,293 2071 4,663 3,104 7,767 585,293 577,526 11,551 589,077 2072 4,572 5,402 9,973 589,077 579,103 11,582 590,686 2073 4,584 5,416 10,001 590,686 580,685 11,614 592,299 2074 4,572 5,402 9,973 592,299 582,326 11,647 593,972 2075 4,572 5,402 9,973 593,972 583,999 11,680 595,679 2076 4,572 5,402 9,973 595,679 585,706 11,714 597,420 2077 5,058 5,058 597,420 592,362 11,847 604,209 2078 5,044 5,044 604,209 599,165 11,983 611,148 2079 5,044 5,044 611,148 606,103 12,122 618,226 2080 5,044 5,044 618,226 613,181 12,264 625,445 2081 5,058 5,058 625,445 620,387 12,408 632,794

Table 11 Decommissioning Cash Flow Analysis for Braidwood Unit 2 +/- SAFSTOR Total (thousands of 2025 dollars)

Year Radiological Decommissioning Cost ISFSI Decommissioning Cost Spent Fuel Management Cost Site Restoration Cost Total Cost(a)

BOY Trust Fund Value BOY Trust Fund Less Cost Trust Fund Earnings(b)

EOY Trust Fund Value(a) 2082 5,044 5,044 632,794 627,750 12,555 640,305 2083 5,044 5,044 640,305 635,261 12,705 647,966 2084 5,044 5,044 647,966 642,922 12,858 655,780 2085 5,058 5,058 655,780 650,722 13,014 663,736 2086 5,044 5,044 663,736 658,692 13,174 671,866 2087 5,044 5,044 671,866 666,821 13,336 680,158 2088 5,044 5,044 680,158 675,113 13,502 688,616 2089 5,058 5,058 688,616 683,558 13,671 697,229 2090 5,044 5,044 697,229 692,184 13,844 706,028 2091 5,044 5,044 706,028 700,984 14,020 715,003 2092 5,044 5,044 715,003 709,959 14,199 724,158 2093 5,058 5,058 724,158 719,100 14,382 733,482 2094 5,044 5,044 733,482 728,438 14,569 743,006 2095 5,044 5,044 743,006 737,962 14,759 752,721 2096 5,044 5,044 752,721 747,677 14,954 762,631 2097 5,058 5,058 762,631 757,572 15,151 772,724 2098 5,044 5,044 772,724 767,680 15,354 783,033 2099 26,550 55 26,605 783,033 756,428 15,129 771,557 2100 66,582 1,805 68,387 771,557 703,170 14,063 717,234 2101 84,844 3,088 87,932 717,234 629,302 12,586 641,888 2102 84,612 3,079 87,692 641,888 554,196 11,084 565,280 2103 84,612 3,079 87,692 565,280 477,588 9,552 487,140 2104 74,853 5,095 79,948 487,140 407,192 8,144 415,335 2105 72,658 7,931 5,182 85,771 415,335 329,564 6,591 336,156 2106 20,086 498 8,677 29,260 336,156 306,896 6,138 313,034 2107 41,099 41,099 313,034 271,935 5,439 277,374 2108 41,099 41,099 277,374 236,275 4,726 241,001 2109 16,126 16,126 241,001 224,875 4,498 229,373 Totals (a) 989,854 8,429 211,365 128,671 1,338,318 (a) Cash flows may not add due to rounding (b) A 2 percent real rate of return is used as allowed by 10 CFR 50.75(e)(1)(i)

Decommissioning Cash Flow Analysis for Byron, Unit 1 SAFSTOR Radiological

Table 12 Decommissioning Cash Flow Analysis for Byron Unit 1 +/- SAFSTOR Radiological (thousands of 2025 dollars)

Year Radiological Decommissioning Cost ISFSI Decommissioning Cost Total Cost(a)

BOY Trust Fund Value BOY Trust Fund Less Cost Trust Fund Earnings(b)

EOY Trust Fund Value(a) 2042 618 618 763,134 762,516 15,250 777,766 2043 3,579 3,579 777,766 774,187 15,484 789,671 2044 8,351 8,351 789,671 781,320 15,626 796,947 2045 30,983 30,983 796,947 765,964 15,319 781,283 2046 19,365 19,365 781,283 761,918 15,238 777,156 2047 53,444 53,444 777,156 723,712 14,474 738,186 2048 52,743 52,743 738,186 685,443 13,709 699,152 2049 44,842 44,842 699,152 654,310 13,086 667,397 2050 38,757 38,757 667,397 628,639 12,573 641,212 2051 27,597 27,597 641,212 613,615 12,272 625,887 2052 9,253 9,253 625,887 616,635 12,333 628,967 2053 4,474 4,474 628,967 624,493 12,490 636,983 2054 4,462 4,462 636,983 632,520 12,650 645,171 2055 4,462 4,462 645,171 640,709 12,814 653,523 2056 4,462 4,462 653,523 649,061 12,981 662,042 2057 4,474 4,474 662,042 657,567 13,151 670,719 2058 4,462 4,462 670,719 666,257 13,325 679,582 2059 4,462 4,462 679,582 675,120 13,502 688,622 2060 4,462 4,462 688,622 684,160 13,683 697,843 2061 4,474 4,474 697,843 693,369 13,867 707,236 2062 4,462 4,462 707,236 702,774 14,055 716,829 2063 4,462 4,462 716,829 712,367 14,247 726,614 2064 4,462 4,462 726,614 722,152 14,443 736,595 2065 4,474 4,474 736,595 732,121 14,642 746,763 2066 4,424 4,424 746,763 742,340 14,847 757,187 2067 4,347 4,347 757,187 752,840 15,057 767,897 2068 4,347 4,347 767,897 763,550 15,271 778,821 2069 4,359 4,359 778,821 774,463 15,489 789,952 2070 4,347 4,347 789,952 785,605 15,712 801,317 2071 4,347 4,347 801,317 796,971 15,939 812,910 2072 4,804 4,804 812,910 808,106 16,162 824,268 2073 4,818 4,818 824,268 819,450 16,389 835,839 2074 4,804 4,804 835,839 831,035 16,621 847,656 2075 4,804 4,804 847,656 842,851 16,857 859,708 2076 4,804 4,804 859,708 854,904 17,098 872,002 2077 4,818 4,818 872,002 867,185 17,344 884,528 2078 4,804 4,804 884,528 879,724 17,594 897,319

Table 12 Decommissioning Cash Flow Analysis for Byron Unit 1 +/- SAFSTOR Radiological (thousands of 2025 dollars)

Year Radiological Decommissioning Cost ISFSI Decommissioning Cost Total Cost(a)

BOY Trust Fund Value BOY Trust Fund Less Cost Trust Fund Earnings(b)

EOY Trust Fund Value(a) 2079 4,804 4,804 897,319 892,514 17,850 910,364 2080 4,804 4,804 910,364 905,560 18,111 923,671 2081 4,818 4,818 923,671 918,854 18,377 937,231 2082 4,804 4,804 937,231 932,427 18,649 951,075 2083 4,804 4,804 951,075 946,271 18,925 965,196 2084 4,804 4,804 965,196 960,392 19,208 979,600 2085 4,818 4,818 979,600 974,782 19,496 994,278 2086 4,804 4,804 994,278 989,473 19,789 1,009,263 2087 4,804 4,804 1,009,263 1,004,459 20,089 1,024,548 2088 4,804 4,804 1,024,548 1,019,743 20,395 1,040,138 2089 4,818 4,818 1,040,138 1,035,321 20,706 1,056,027 2090 4,804 4,804 1,056,027 1,051,223 21,024 1,072,247 2091 4,804 4,804 1,072,247 1,067,443 21,349 1,088,792 2092 4,804 4,804 1,088,792 1,083,987 21,680 1,105,667 2093 4,818 4,818 1,105,667 1,100,850 22,017 1,122,867 2094 4,804 4,804 1,122,867 1,118,062 22,361 1,140,424 2095 4,804 4,804 1,140,424 1,135,619 22,712 1,158,332 2096 4,804 4,804 1,158,332 1,153,527 23,071 1,176,598 2097 25,660 25,660 1,176,598 1,150,938 23,019 1,173,956 2098 67,853 67,853 1,173,956 1,106,103 22,122 1,128,226 2099 88,978 88,978 1,128,226 1,039,248 20,785 1,060,033 2100 88,978 88,978 1,060,033 971,055 19,421 990,476 2101 89,221 89,221 990,476 901,255 18,025 919,280 2102 58,862 58,862 919,280 860,418 17,208 877,627 2103 54,627 6,853 61,480 877,627 816,147 16,323 832,470 2104 21,821 853 22,674 832,470 809,796 16,196 825,991 2105

- 825,991 825,991 16,520 842,511 2106

- 842,511 842,511 16,850 859,361 2107

- 859,361 859,361 17,187 876,549 Totals(a) 989,945 7,706 997,651 (a) Cash flows may not add due to rounding (b) A 2 percent real rate of return is used as allowed by 10 CFR 50.75(e)(1)(i)

Decommissioning Cash Flow Analysis for Byron, Unit 2 SAFSTOR Radiological

Table 13 Decommissioning Cash Flow Analysis for Byron Unit 2 +/- SAFSTOR Radiological (thousands of 2025 dollars)

Year Radiological Decommissioning Cost ISFSI Decommissioning Cost Total Cost(a)

BOY Trust Fund Value BOY Trust Fund Less Cost Trust Fund Earnings(b)

EOY Trust Fund Value(a) 2044 553 553 764,311 763,758 15,275 779,033 2045 3,550 3,550 779,033 775,484 15,510 790,993 2046 10,214 10,214 790,993 780,780 15,616 796,395 2047 81,357 81,357 796,395 715,038 14,301 729,338 2048 61,482 61,482 729,338 667,856 13,357 681,213 2049 47,409 47,409 681,213 633,804 12,676 646,480 2050 41,317 41,317 646,480 605,163 12,103 617,266 2051 30,009 30,009 617,266 587,257 11,745 599,002 2052 9,837 9,837 599,002 589,166 11,783 600,949 2053 4,598 4,598 600,949 596,351 11,927 608,278 2054 4,586 4,586 608,278 603,692 12,074 615,766 2055 4,586 4,586 615,766 611,181 12,224 623,404 2056 4,586 4,586 623,404 618,819 12,376 631,195 2057 4,598 4,598 631,195 626,597 12,532 639,129 2058 4,586 4,586 639,129 634,544 12,691 647,234 2059 4,586 4,586 647,234 642,649 12,853 655,502 2060 4,586 4,586 655,502 650,916 13,018 663,935 2061 4,598 4,598 663,935 659,337 13,187 672,523 2062 4,586 4,586 672,523 667,938 13,359 681,296 2063 4,586 4,586 681,296 676,711 13,534 690,245 2064 4,586 4,586 690,245 685,660 13,713 699,373 2065 4,598 4,598 699,373 694,775 13,895 708,670 2066 4,547 4,547 708,670 704,123 14,082 718,206 2067 4,470 4,470 718,206 713,736 14,275 728,011 2068 4,470 4,470 728,011 723,541 14,471 738,011 2069 4,482 4,482 738,011 733,529 14,671 748,200 2070 4,470 4,470 748,200 743,730 14,875 758,604 2071 4,470 4,470 758,604 754,134 15,083 769,217 2072 4,928 4,928 769,217 764,289 15,286 779,575 2073 4,941 4,941 779,575 774,634 15,493 790,127 2074 4,928 4,928 790,127 785,199 15,704 800,903 2075 4,928 4,928 800,903 795,975 15,920 811,895 2076 4,928 4,928 811,895 806,967 16,139 823,106 2077 4,941 4,941 823,106 818,165 16,363 834,528 2078 4,928 4,928 834,528 829,601 16,592 846,193 2079 4,928 4,928 846,193 841,265 16,825 858,090 2080 4,928 4,928 858,090 853,163 17,063 870,226

Table 13 Decommissioning Cash Flow Analysis for Byron Unit 2 +/- SAFSTOR Radiological (thousands of 2025 dollars)

Year Radiological Decommissioning Cost ISFSI Decommissioning Cost Total Cost(a)

BOY Trust Fund Value BOY Trust Fund Less Cost Trust Fund Earnings(b)

EOY Trust Fund Value(a) 2081 4,941 4,941 870,226 865,285 17,306 882,590 2082 4,928 4,928 882,590 877,663 17,553 895,216 2083 4,928 4,928 895,216 890,288 17,806 908,094 2084 4,928 4,928 908,094 903,166 18,063 921,230 2085 4,941 4,941 921,230 916,288 18,326 934,614 2086 4,928 4,928 934,614 929,686 18,594 948,280 2087 4,928 4,928 948,280 943,352 18,867 962,220 2088 4,928 4,928 962,220 957,292 19,146 976,438 2089 4,941 4,941 976,438 971,496 19,430 990,926 2090 4,928 4,928 990,926 985,999 19,720 1,005,719 2091 4,928 4,928 1,005,719 1,000,791 20,016 1,020,807 2092 4,928 4,928 1,020,807 1,015,879 20,318 1,036,197 2093 4,941 4,941 1,036,197 1,031,255 20,625 1,051,881 2094 4,928 4,928 1,051,881 1,046,953 20,939 1,067,892 2095 4,928 4,928 1,067,892 1,062,964 21,259 1,084,224 2096 4,928 4,928 1,084,224 1,079,296 21,586 1,100,882 2097 25,784 25,784 1,100,882 1,075,098 21,502 1,096,600 2098 65,959 65,959 1,096,600 1,030,641 20,613 1,051,254 2099 85,326 85,326 1,051,254 965,928 19,319 985,247 2100 85,326 85,326 985,247 899,921 17,998 917,920 2101 85,559 85,559 917,920 832,360 16,647 849,007 2102 67,825 67,825 849,007 781,183 15,624 796,806 2103 64,679 6,853 71,532 796,806 725,275 14,505 739,780 2104 22,725 853 23,577 739,780 716,203 14,324 730,527 2105

- 730,527 730,527 14,611 745,137 2106

- 745,137 745,137 14,903 760,040 2107

- 760,040 760,040 15,201 775,241 Totals(a) 998,755 7,706 1,006,460 (a) Cash flows may not add due to rounding (b) A 2 percent real rate of return is used as allowed by 10 CFR 50.75(e)(1)(i)

Decommissioning Cash Flow Analysis for Byron, Unit 1 SAFSTOR Total

Table 14 Decommissioning Cash Flow Analysis for Byron Unit 1 +/- SAFSTOR Total (thousands of 2025 dollars)

Year Radiological Decommissioning Cost ISFSI Decommissioning Cost Spent Fuel Management Cost Site Restoration Cost Total Cost(a)

BOY Trust Fund Value BOY Trust Fund Less Cost Trust Fund Earnings(b)

EOY Trust Fund Value(a) 2042 618 618 763,134 762,516 15,250 777,766 2043 3,579 3,579 777,766 774,187 15,484 789,671 2044 8,351 11,865 12 20,227 789,671 769,444 15,389 784,832 2045 30,983 71,141 70 102,194 784,832 682,639 13,653 696,292 2046 19,365 14,049 26 33,439 696,292 662,852 13,257 676,109 2047 53,444 2,406 16 55,867 676,109 620,242 12,405 632,647 2048 52,743 2,406 16 55,166 632,647 577,481 11,550 589,030 2049 44,842 4,306 16 49,164 589,030 539,866 10,797 550,663 2050 38,757 24,003 16 62,777 550,663 487,887 9,758 497,644 2051 27,597 22,169 26 49,792 497,644 447,853 8,957 456,810 2052 9,253 2,406 83 11,743 456,810 445,067 8,901 453,968 2053 4,474 2,413 6,887 453,968 447,081 8,942 456,023 2054 4,462 2,406 6,869 456,023 449,154 8,983 458,137 2055 4,462 2,406 6,869 458,137 451,268 9,025 460,294 2056 4,462 2,406 6,869 460,294 453,425 9,069 462,494 2057 4,474 2,413 6,887 462,494 455,606 9,112 464,718 2058 4,462 2,406 6,869 464,718 457,850 9,157 467,007 2059 4,462 2,406 6,869 467,007 460,138 9,203 469,341 2060 4,462 2,406 6,869 469,341 462,472 9,249 471,722 2061 4,474 2,413 6,887 471,722 464,834 9,297 474,131 2062 4,462 2,406 6,869 474,131 467,262 9,345 476,608 2063 4,462 2,406 6,869 476,608 469,739 9,395 479,134 2064 4,462 2,406 6,869 479,134 472,265 9,445 481,710 2065 4,474 2,413 6,887 481,710 474,823 9,496 484,319 2066 4,424 3,339 7,763 484,319 476,557 9,531 486,088 2067 4,347 5,196 9,543 486,088 476,545 9,531 486,076 2068 4,347 5,196 9,543 486,076 476,533 9,531 486,064 2069 4,359 5,210 9,569 486,064 476,495 9,530 486,025 2070 4,347 5,196 9,543 486,025 476,482 9,530 486,011 2071 4,347 5,196 9,543 486,011 476,468 9,529 485,998 2072 4,804 4,804 485,998 481,193 9,624 490,817 2073 4,818 4,818 490,817 486,000 9,720 495,720 2074 4,804 4,804 495,720 490,915 9,818 500,734 2075 4,804 4,804 500,734 495,929 9,919 505,848 2076 4,804 4,804 505,848 501,044 10,021 511,065 2077 4,818 4,818 511,065 506,247 10,125 516,372 2078 4,804 4,804 516,372 511,568 10,231 521,799

Table 14 Decommissioning Cash Flow Analysis for Byron Unit 1 +/- SAFSTOR Total (thousands of 2025 dollars)

Year Radiological Decommissioning Cost ISFSI Decommissioning Cost Spent Fuel Management Cost Site Restoration Cost Total Cost(a)

BOY Trust Fund Value BOY Trust Fund Less Cost Trust Fund Earnings(b)

EOY Trust Fund Value(a) 2079 4,804 4,804 521,799 516,995 10,340 527,335 2080 4,804 4,804 527,335 522,530 10,451 532,981 2081 4,818 4,818 532,981 528,163 10,563 538,727 2082 4,804 4,804 538,727 533,922 10,678 544,601 2083 4,804 4,804 544,601 539,796 10,796 550,592 2084 4,804 4,804 550,592 545,788 10,916 556,704 2085 4,818 4,818 556,704 551,886 11,038 562,924 2086 4,804 4,804 562,924 558,120 11,162 569,282 2087 4,804 4,804 569,282 564,478 11,290 575,767 2088 4,804 4,804 575,767 570,963 11,419 582,382 2089 4,818 4,818 582,382 577,565 11,551 589,116 2090 4,804 4,804 589,116 584,311 11,686 595,998 2091 4,804 4,804 595,998 591,193 11,824 603,017 2092 4,804 4,804 603,017 598,213 11,964 610,177 2093 4,818 4,818 610,177 605,360 12,107 617,467 2094 4,804 4,804 617,467 612,662 12,253 624,916 2095 4,804 4,804 624,916 620,111 12,402 632,514 2096 4,804 4,804 632,514 627,709 12,554 640,263 2097 25,660 50 25,711 640,263 614,553 12,291 626,844 2098 67,853 1,118 68,970 626,844 557,873 11,157 569,031 2099 88,978 2,010 90,987 569,031 478,044 9,561 487,604 2100 88,978 2,010 90,987 487,604 396,617 7,932 404,550 2101 89,221 2,015 91,237 404,550 313,313 6,266 319,579 2102 58,862 3,120 61,982 319,579 257,597 5,152 262,749 2103 54,627 6,853 3,216 64,696 262,749 198,053 3,961 202,014 2104 21,821 853 5,593 28,268 202,014 173,746 3,475 177,221 2105 31,866 31,866 177,221 145,356 2,907 148,263 2106 31,866 31,866 148,263 116,397 2,328 118,725 2107 13,524 13,524 118,725 105,201 2,104 107,305 Totals (a) 989,945 7,706 215,397 96,670 1,309,718 (a) Cash flows may not add due to rounding (b) A 2 percent real rate of return is used as allowed by 10 CFR 50.75(e)(1)(i)

Decommissioning Cash Flow Analysis for Byron, Unit 2 SAFSTOR Total

Table 15 Decommissioning Cash Flow Analysis for Byron Unit 2 +/- SAFSTOR Total (thousands of 2025 dollars)

Year Radiological Decommissioning Cost ISFSI Decommissioning Cost Spent Fuel Management Cost Site Restoration Cost Total Cost(a)

BOY Trust Fund Value BOY Trust Fund Less Cost Trust Fund Earnings(b)

EOY Trust Fund Value(a) 2044 553 553 764,311 763,758 15,275 779,033 2045 3,550 3,550 779,033 775,484 15,510 790,993 2046 10,214 5,906 6

16,126 790,993 774,868 15,497 790,365 2047 81,357 69,537 71 150,965 790,365 639,400 12,788 652,188 2048 61,482 18,768 37 80,287 652,188 571,902 11,438 583,340 2049 47,409 4,250 26 51,684 583,340 531,655 10,633 542,288 2050 41,317 24,033 26 65,376 542,288 476,913 9,538 486,451 2051 30,009 22,196 34 52,239 486,451 434,212 8,684 442,896 2052 9,837 2,406 83 12,327 442,896 430,570 8,611 439,181 2053 4,598 2,413 7,011 439,181 432,170 8,643 440,813 2054 4,586 2,406 6,992 440,813 433,821 8,676 442,498 2055 4,586 2,406 6,992 442,498 435,506 8,710 444,216 2056 4,586 2,406 6,992 444,216 437,224 8,744 445,968 2057 4,598 2,413 7,011 445,968 438,957 8,779 447,736 2058 4,586 2,406 6,992 447,736 440,744 8,815 449,559 2059 4,586 2,406 6,992 449,559 442,567 8,851 451,419 2060 4,586 2,406 6,992 451,419 444,427 8,889 453,315 2061 4,598 2,413 7,011 453,315 446,304 8,926 455,230 2062 4,586 2,406 6,992 455,230 448,238 8,965 457,203 2063 4,586 2,406 6,992 457,203 450,211 9,004 459,215 2064 4,586 2,406 6,992 459,215 452,223 9,044 461,267 2065 4,598 2,413 7,011 461,267 454,256 9,085 463,341 2066 4,547 3,339 7,886 463,341 455,455 9,109 464,564 2067 4,470 5,196 9,666 464,564 454,898 9,098 463,996 2068 4,470 5,196 9,666 463,996 454,330 9,087 463,417 2069 4,482 5,210 9,693 463,417 453,724 9,074 462,798 2070 4,470 5,196 9,666 462,798 453,132 9,063 462,195 2071 4,470 5,196 9,666 462,195 452,529 9,051 461,579 2072 4,928 4,928 461,579 456,651 9,133 465,784 2073 4,941 4,941 465,784 460,843 9,217 470,060 2074 4,928 4,928 470,060 465,132 9,303 474,435 2075 4,928 4,928 474,435 469,507 9,390 478,898 2076 4,928 4,928 478,898 473,970 9,479 483,449 2077 4,941 4,941 483,449 478,508 9,570 488,078 2078 4,928 4,928 488,078 483,150 9,663 492,813 2079 4,928 4,928 492,813 487,886 9,758 497,644 2080 4,928 4,928 497,644 492,716 9,854 502,570

Table 15 Decommissioning Cash Flow Analysis for Byron Unit 2 +/- SAFSTOR Total (thousands of 2025 dollars)

Year Radiological Decommissioning Cost ISFSI Decommissioning Cost Spent Fuel Management Cost Site Restoration Cost Total Cost(a)

BOY Trust Fund Value BOY Trust Fund Less Cost Trust Fund Earnings(b)

EOY Trust Fund Value(a) 2081 4,941 4,941 502,570 497,629 9,953 507,581 2082 4,928 4,928 507,581 502,654 10,053 512,707 2083 4,928 4,928 512,707 507,779 10,156 517,935 2084 4,928 4,928 517,935 513,007 10,260 523,267 2085 4,941 4,941 523,267 518,326 10,367 528,692 2086 4,928 4,928 528,692 523,765 10,475 534,240 2087 4,928 4,928 534,240 529,312 10,586 539,899 2088 4,928 4,928 539,899 534,971 10,699 545,670 2089 4,941 4,941 545,670 540,729 10,815 551,544 2090 4,928 4,928 551,544 546,616 10,932 557,548 2091 4,928 4,928 557,548 552,621 11,052 563,673 2092 4,928 4,928 563,673 558,745 11,175 569,920 2093 4,941 4,941 569,920 564,979 11,300 576,279 2094 4,928 4,928 576,279 571,351 11,427 582,778 2095 4,928 4,928 582,778 577,850 11,557 589,407 2096 4,928 4,928 589,407 584,480 11,690 596,169 2097 25,784 50 25,834 596,169 570,335 11,407 581,741 2098 65,959 1,514 67,473 581,741 514,269 10,285 524,554 2099 85,326 2,752 88,077 524,554 436,477 8,730 445,206 2100 85,326 2,752 88,077 445,206 357,129 7,143 364,272 2101 85,559 2,759 88,318 364,272 275,953 5,519 281,472 2102 67,825 4,412 72,237 281,472 209,236 4,185 213,421 2103 64,679 6,853 4,555 76,087 213,421 137,334 2,747 140,080 2104 22,725 853 7,912 31,489 140,080 108,591 2,172 110,763 2105 45,071 45,071 110,763 65,691 1,314 67,005 2106 45,071 45,071 67,005 21,934 439 22,372 2107 17,900 17,900 22,372 4,472 89 4,561 Totals (a) 998,755 7,706 207,740 135,031 1,349,231 (a) Cash flows may not add due to rounding (b) A 2 percent real rate of return is used as allowed by 10 CFR 50.75(e)(1)(i) 0 Decommissioning Cash Flow Analysis for LaSalle, Unit 1 SAFSTOR Radiological

Table 16 Decommissioning Cash Flow Analysis for LaSalle Unit 1 +/- SAFSTOR Radiological (thousands of 2025 dollars)

Year Radiological Decommissioning Cost ISFSI Decommissioning Cost Total Cost(a)

BOY Trust Fund Value BOY Trust Fund Less Cost Trust Fund Earnings(b)

EOY Trust Fund Value(a) 2040 2,403 2,403 991,973 989,571 19,791 1,009,362 2041 3,372 3,372 1,009,362 1,005,990 20,120 1,026,110 2042 30,875 30,875 1,026,110 995,234 19,905 1,015,139 2043 31,975 31,975 1,015,139 983,164 19,663 1,002,827 2044 43,314 43,314 1,002,827 959,513 19,190 978,703 2045 43,196 43,196 978,703 935,507 18,710 954,217 2046 38,415 38,415 954,217 915,802 18,316 934,118 2047 35,211 35,211 934,118 898,907 17,978 916,885 2048 29,424 29,424 916,885 887,461 17,749 905,210 2049 10,316 10,316 905,210 894,894 17,898 912,792 2050 4,544 4,544 912,792 908,248 18,165 926,413 2051 4,544 4,544 926,413 921,870 18,437 940,307 2052 4,556 4,556 940,307 935,751 18,715 954,466 2053 4,544 4,544 954,466 949,923 18,998 968,921 2054 4,544 4,544 968,921 964,377 19,288 983,665 2055 4,544 4,544 983,665 979,121 19,582 998,704 2056 4,556 4,556 998,704 994,148 19,883 1,014,031 2057 4,544 4,544 1,014,031 1,009,487 20,190 1,029,677 2058 4,544 4,544 1,029,677 1,025,133 20,503 1,045,636 2059 4,544 4,544 1,045,636 1,041,093 20,822 1,061,914 2060 4,539 4,539 1,061,914 1,057,376 21,148 1,078,523 2061 4,440 4,440 1,078,523 1,074,083 21,482 1,095,565 2062 4,440 4,440 1,095,565 1,091,125 21,823 1,112,948 2063 4,440 4,440 1,112,948 1,108,508 22,170 1,130,678 2064 4,452 4,452 1,130,678 1,126,226 22,525 1,148,751 2065 4,440 4,440 1,148,751 1,144,311 22,886 1,167,197 2066 4,440 4,440 1,167,197 1,162,757 23,255 1,186,013 2067 4,879 4,879 1,186,013 1,181,134 23,623 1,204,756 2068 4,892 4,892 1,204,756 1,199,864 23,997 1,223,861 2069 4,879 4,879 1,223,861 1,218,982 24,380 1,243,362 2070 4,879 4,879 1,243,362 1,238,483 24,770 1,263,253 2071 4,879 4,879 1,263,253 1,258,374 25,167 1,283,541 2072 4,892 4,892 1,283,541 1,278,649 25,573 1,304,222 2073 4,879 4,879 1,304,222 1,299,343 25,987 1,325,330 2074 4,879 4,879 1,325,330 1,320,451 26,409 1,346,860 2075 4,879 4,879 1,346,860 1,341,981 26,840 1,368,820 2076 4,892 4,892 1,368,820 1,363,928 27,279 1,391,207

Table 16 Decommissioning Cash Flow Analysis for LaSalle Unit 1 +/- SAFSTOR Radiological (thousands of 2025 dollars)

Year Radiological Decommissioning Cost ISFSI Decommissioning Cost Total Cost(a)

BOY Trust Fund Value BOY Trust Fund Less Cost Trust Fund Earnings(b)

EOY Trust Fund Value(a) 2077 4,879 4,879 1,391,207 1,386,328 27,727 1,414,054 2078 4,879 4,879 1,414,054 1,409,175 28,184 1,437,359 2079 4,879 4,879 1,437,359 1,432,480 28,650 1,461,129 2080 4,892 4,892 1,461,129 1,456,237 29,125 1,485,362 2081 4,879 4,879 1,485,362 1,480,483 29,610 1,510,093 2082 4,879 4,879 1,510,093 1,505,214 30,104 1,535,318 2083 4,879 4,879 1,535,318 1,530,439 30,609 1,561,048 2084 4,892 4,892 1,561,048 1,556,155 31,123 1,587,278 2085 4,879 4,879 1,587,278 1,582,400 31,648 1,614,048 2086 4,879 4,879 1,614,048 1,609,169 32,183 1,641,352 2087 4,879 4,879 1,641,352 1,636,473 32,729 1,669,202 2088 4,892 4,892 1,669,202 1,664,310 33,286 1,697,596 2089 4,879 4,879 1,697,596 1,692,717 33,854 1,726,572 2090 4,879 4,879 1,726,572 1,721,693 34,434 1,756,127 2091 4,879 4,879 1,756,127 1,751,248 35,025 1,786,273 2092 4,892 4,892 1,786,273 1,781,380 35,628 1,817,008 2093 4,879 4,879 1,817,008 1,812,129 36,243 1,848,372 2094 7,789 7,789 1,848,372 1,840,582 36,812 1,877,394 2095 45,715 45,715 1,877,394 1,831,679 36,634 1,868,312 2096 96,585 96,585 1,868,312 1,771,727 35,435 1,807,162 2097 96,321 96,321 1,807,162 1,710,841 34,217 1,745,058 2098 96,321 96,321 1,745,058 1,648,737 32,975 1,681,712 2099 89,016 89,016 1,681,712 1,592,696 31,854 1,624,550 2100 80,258 2,686 82,944 1,624,550 1,541,606 30,832 1,572,438 2101 52,276 7,145 59,421 1,572,438 1,513,017 30,260 1,543,277 2102 6,474 6,474 1,543,277 1,536,804 30,736 1,567,540 2103 1,567,540 1,567,540 31,351 1,598,891 2104 1,598,891 1,598,891 31,978 1,630,868 Totals(a) 1,047,733 9,830 1,057,563 (a) Cash flows may not add due to rounding (b) A 2 percent real rate of return is used as allowed by 10 CFR 50.75(e)(1)(i) 1 Decommissioning Cash Flow Analysis for LaSalle, Unit 2 SAFSTOR Radiological

Table 17 Decommissioning Cash Flow Analysis for LaSalle Unit 2 +/- SAFSTOR Radiological (thousands of 2025 dollars)

Year Radiological Decommissioning Cost ISFSI Decommissioning Cost Total Cost(a)

BOY Trust Fund Value BOY Trust Fund Less Cost Trust Fund Earnings(b)

EOY Trust Fund Value(a) 2041 155

- 155 1,013,862 1,013,706 20,274 1,033,981 2042 3,334 3,334 1,033,981 1,030,647 20,613 1,051,259 2043 3,412 3,412 1,051,259 1,047,847 20,957 1,068,804 2044 68,207 68,207 1,068,804 1,000,597 20,012 1,020,609 2045 46,093 46,093 1,020,609 974,517 19,490 994,007 2046 41,312 41,312 994,007 952,695 19,054 971,749 2047 38,108 38,108 971,749 933,641 18,673 952,314 2048 32,329 32,329 952,314 919,985 18,400 938,384 2049 10,944 10,944 938,384 927,440 18,549 945,989 2050 4,665 4,665 945,989 941,325 18,826 960,151 2051 4,665 4,665 960,151 955,486 19,110 974,596 2052 4,677 4,677 974,596 969,919 19,398 989,317 2053 4,665 4,665 989,317 984,653 19,693 1,004,346 2054 4,665 4,665 1,004,346 999,681 19,994 1,019,675 2055 4,665 4,665 1,019,675 1,015,010 20,300 1,035,310 2056 4,677 4,677 1,035,310 1,030,633 20,613 1,051,246 2057 4,665 4,665 1,051,246 1,046,581 20,932 1,067,513 2058 4,665 4,665 1,067,513 1,062,848 21,257 1,084,105 2059 4,665 4,665 1,084,105 1,079,440 21,589 1,101,029 2060 4,660 4,660 1,101,029 1,096,369 21,927 1,118,297 2061 4,561 4,561 1,118,297 1,113,736 22,275 1,136,011 2062 4,561 4,561 1,136,011 1,131,450 22,629 1,154,079 2063 4,561 4,561 1,154,079 1,149,518 22,990 1,172,508 2064 4,573 4,573 1,172,508 1,167,935 23,359 1,191,294 2065 4,561 4,561 1,191,294 1,186,733 23,735 1,210,467 2066 4,561 4,561 1,210,467 1,205,907 24,118 1,230,025 2067 5,000 5,000 1,230,025 1,225,025 24,500 1,249,525 2068 5,014 5,014 1,249,525 1,244,512 24,890 1,269,402 2069 5,000 5,000 1,269,402 1,264,402 25,288 1,289,690 2070 5,000 5,000 1,289,690 1,284,690 25,694 1,310,384 2071 5,000 5,000 1,310,384 1,305,384 26,108 1,331,491 2072 5,014 5,014 1,331,491 1,326,478 26,530 1,353,007 2073 5,000 5,000 1,353,007 1,348,007 26,960 1,374,967 2074 5,000 5,000 1,374,967 1,369,967 27,399 1,397,367 2075 5,000 5,000 1,397,367 1,392,367 27,847 1,420,214 2076 5,014 5,014 1,420,214 1,415,200 28,304 1,443,504 2077 5,000 5,000 1,443,504 1,438,504 28,770 1,467,275

Table 17 Decommissioning Cash Flow Analysis for LaSalle Unit 2 +/- SAFSTOR Radiological (thousands of 2025 dollars)

Year Radiological Decommissioning Cost ISFSI Decommissioning Cost Total Cost(a)

BOY Trust Fund Value BOY Trust Fund Less Cost Trust Fund Earnings(b)

EOY Trust Fund Value(a) 2078 5,000 5,000 1,467,275 1,462,275 29,245 1,491,520 2079 5,000 5,000 1,491,520 1,486,520 29,730 1,516,250 2080 5,014 5,014 1,516,250 1,511,237 30,225 1,541,461 2081 5,000 5,000 1,541,461 1,536,461 30,729 1,567,191 2082 5,000 5,000 1,567,191 1,562,191 31,244 1,593,435 2083 5,000 5,000 1,593,435 1,588,435 31,769 1,620,203 2084 5,014 5,014 1,620,203 1,615,190 32,304 1,647,493 2085 5,000 5,000 1,647,493 1,642,493 32,850 1,675,343 2086 5,000 5,000 1,675,343 1,670,343 33,407 1,703,750 2087 5,000 5,000 1,703,750 1,698,750 33,975 1,732,725 2088 5,014 5,014 1,732,725 1,727,711 34,554 1,762,266 2089 5,000 5,000 1,762,266 1,757,266 35,145 1,792,411 2090 5,000 5,000 1,792,411 1,787,411 35,748 1,823,159 2091 5,000 5,000 1,823,159 1,818,159 36,363 1,854,522 2092 5,014 5,014 1,854,522 1,849,509 36,990 1,886,499 2093 5,000 5,000 1,886,499 1,881,499 37,630 1,919,129 2094 7,910 7,910 1,919,129 1,911,218 38,224 1,949,443 2095 45,962 45,962 1,949,443 1,903,481 38,070 1,941,550 2096 98,351 98,351 1,941,550 1,843,199 36,864 1,880,063 2097 98,082 98,082 1,880,063 1,781,981 35,640 1,817,620 2098 98,082 98,082 1,817,620 1,719,538 34,391 1,753,929 2099 93,172 93,172 1,753,929 1,660,757 33,215 1,693,972 2100 87,208 2,686 89,894 1,693,972 1,604,078 32,082 1,636,159 2101 56,063 7,145 63,207 1,636,159 1,572,952 31,459 1,604,411 2102 6,503 6,503 1,604,411 1,597,908 31,958 1,629,866 2103 1,629,866 1,629,866 32,597 1,662,464 2104 1,662,464 1,662,464 33,249 1,695,713 Totals(a) 1,049,033 9,830 1,058,863 (a) Cash flows may not add due to rounding (b) A 2 percent real rate of return is used as allowed by 10 CFR 50.75(e)(1)(i) 2 Decommissioning Cash Flow Analysis for LaSalle, Unit 1 SAFSTOR Total

Table 18 Decommissioning Cash Flow Analysis for LaSalle Unit 1 +/- SAFSTOR Total (thousands of 2025 dollars)

Year Radiological Decommissioning Cost ISFSI Decommissioning Cost Spent Fuel Management Cost Site Restoration Cost Total Cost(a)

BOY Trust Fund Value BOY Trust Fund Less Cost Trust Fund Earnings(b)

EOY Trust Fund Value(a) 2040 2,403 2,403 991,973 989,571 19,791 1,009,362 2041 3,372 3,372 1,009,362 1,005,990 20,120 1,026,110 2042 30,875 101,635 75 132,585 1,026,110 893,525 17,870 911,395 2043 31,975 27,204 32 59,211 911,395 852,184 17,044 869,228 2044 43,314 2,291 16 45,621 869,228 823,607 16,472 840,079 2045 43,196 2,285 16 45,497 840,079 794,582 15,892 810,473 2046 38,415 2,356 16 40,787 810,473 769,687 15,394 785,080 2047 35,211 28,207 16 63,435 785,080 721,646 14,433 736,078 2048 29,424 28,285 16 57,725 736,078 678,353 13,567 691,920 2049 10,316 2,285 93 12,694 691,920 679,226 13,585 692,811 2050 4,544 2,285 6,828 692,811 685,982 13,720 699,702 2051 4,544 2,285 6,828 699,702 692,873 13,857 706,731 2052 4,556 2,291 6,847 706,731 699,884 13,998 713,881 2053 4,544 2,285 6,828 713,881 707,053 14,141 721,194 2054 4,544 2,285 6,828 721,194 714,365 14,287 728,653 2055 4,544 2,285 6,828 728,653 721,824 14,436 736,261 2056 4,556 2,291 6,847 736,261 729,414 14,588 744,002 2057 4,544 2,285 6,828 744,002 737,173 14,743 751,917 2058 4,544 2,285 6,828 751,917 745,088 14,902 759,990 2059 4,544 2,285 6,828 759,990 753,162 15,063 768,225 2060 4,539 2,787 7,325 768,225 760,900 15,218 776,118 2061 4,440 5,247 9,686 776,118 766,431 15,329 781,760 2062 4,440 5,247 9,686 781,760 772,073 15,441 787,515 2063 4,440 5,247 9,686 787,515 777,829 15,557 793,385 2064 4,452 5,261 9,713 793,385 783,672 15,673 799,346 2065 4,440 5,247 9,686 799,346 789,659 15,793 805,452 2066 4,440 5,247 9,686 805,452 795,766 15,915 811,681 2067 4,879 4,879 811,681 806,802 16,136 822,938 2068 4,892 4,892 822,938 818,046 16,361 834,407 2069 4,879 4,879 834,407 829,528 16,591 846,119 2070 4,879 4,879 846,119 841,240 16,825 858,064 2071 4,879 4,879 858,064 853,185 17,064 870,249 2072 4,892 4,892 870,249 865,357 17,307 882,664 2073 4,879 4,879 882,664 877,785 17,556 895,341 2074 4,879 4,879 895,341 890,462 17,809 908,271 2075 4,879 4,879 908,271 903,392 18,068 921,460 2076 4,892 4,892 921,460 916,568 18,331 934,899

Table 18 Decommissioning Cash Flow Analysis for LaSalle Unit 1 +/- SAFSTOR Total (thousands of 2025 dollars)

Year Radiological Decommissioning Cost ISFSI Decommissioning Cost Spent Fuel Management Cost Site Restoration Cost Total Cost(a)

BOY Trust Fund Value BOY Trust Fund Less Cost Trust Fund Earnings(b)

EOY Trust Fund Value(a) 2077 4,879 4,879 934,899 930,020 18,600 948,620 2078 4,879 4,879 948,620 943,741 18,875 962,616 2079 4,879 4,879 962,616 957,737 19,155 976,892 2080 4,892 4,892 976,892 972,000 19,440 991,440 2081 4,879 4,879 991,440 986,561 19,731 1,006,292 2082 4,879 4,879 1,006,292 1,001,413 20,028 1,021,441 2083 4,879 4,879 1,021,441 1,016,562 20,331 1,036,894 2084 4,892 4,892 1,036,894 1,032,001 20,640 1,052,641 2085 4,879 4,879 1,052,641 1,047,762 20,955 1,068,718 2086 4,879 4,879 1,068,718 1,063,839 21,277 1,085,115 2087 4,879 4,879 1,085,115 1,080,236 21,605 1,101,841 2088 4,892 4,892 1,101,841 1,096,949 21,939 1,118,888 2089 4,879 4,879 1,118,888 1,114,009 22,280 1,136,289 2090 4,879 4,879 1,136,289 1,131,410 22,628 1,154,038 2091 4,879 4,879 1,154,038 1,149,159 22,983 1,172,143 2092 4,892 4,892 1,172,143 1,167,250 23,345 1,190,595 2093 4,879 4,879 1,190,595 1,185,716 23,714 1,209,431 2094 7,789 7

7,797 1,209,431 1,201,634 24,033 1,225,666 2095 45,715 100 45,816 1,225,666 1,179,851 23,597 1,203,448 2096 96,585 189 96,774 1,203,448 1,106,674 22,133 1,128,807 2097 96,321 189 96,510 1,128,807 1,032,297 20,646 1,052,943 2098 96,321 189 96,510 1,052,943 956,434 19,129 975,562 2099 89,016 360 89,377 975,562 886,186 17,724 903,910 2100 80,258 2,686 561 83,505 903,910 820,405 16,408 836,813 2101 52,276 7,145 302 59,723 836,813 777,090 15,542 792,632 2102 6,474 18,840 25,314 792,632 767,318 15,346 782,665 2103 26,650 26,650 782,665 756,015 15,120 771,135 2104 25,159 25,159 771,135 745,976 14,920 760,896 Totals (a) 1,047,733 9,830 251,690 72,827 1,382,080 (a) Cash flows may not add due to rounding (b) A 2 percent real rate of return is used as allowed by 10 CFR 50.75(e)(1)(i) 3 Decommissioning Cash Flow Analysis for LaSalle, Unit 2 SAFSTOR Total

Table 19 Decommissioning Cash Flow Analysis for LaSalle Unit 2 +/- SAFSTOR Total (thousands of 2025 dollars)

Year Radiological Decommissioning Cost ISFSI Decommissioning Cost Spent Fuel Management Cost Site Restoration Cost Total Cost(a)

BOY Trust Fund Value BOY Trust Fund Less Cost Trust Fund Earnings(b)

EOY Trust Fund Value(a) 2041 155 155 1,013,862 1,013,706 20,274 1,033,981 2042 3,334 3,334 1,033,981 1,030,647 20,613 1,051,259 2043 3,412 3,412 1,051,259 1,047,847 20,957 1,068,804 2044 68,207 127,311 97 195,614 1,068,804 873,190 17,464 890,653 2045 46,093 2,285 22 48,400 890,653 842,253 16,845 859,098 2046 41,312 2,285 22 43,619 859,098 815,480 16,310 831,789 2047 38,108 28,243 22 66,374 831,789 765,416 15,308 780,724 2048 32,329 28,320 22 60,672 780,724 720,052 14,401 734,453 2049 10,944 2,285 93 13,322 734,453 721,131 14,423 735,553 2050 4,665 2,285 6,950 735,553 728,604 14,572 743,176 2051 4,665 2,285 6,950 743,176 736,226 14,725 750,951 2052 4,677 2,291 6,969 750,951 743,982 14,880 758,862 2053 4,665 2,285 6,950 758,862 751,912 15,038 766,951 2054 4,665 2,285 6,950 766,951 760,001 15,200 775,201 2055 4,665 2,285 6,950 775,201 768,251 15,365 783,616 2056 4,677 2,291 6,969 783,616 776,648 15,533 792,181 2057 4,665 2,285 6,950 792,181 785,231 15,705 800,936 2058 4,665 2,285 6,950 800,936 793,986 15,880 809,866 2059 4,665 2,285 6,950 809,866 802,917 16,058 818,975 2060 4,660 2,787 7,447 818,975 811,528 16,231 827,759 2061 4,561 5,247 9,807 827,759 817,952 16,359 834,311 2062 4,561 5,247 9,807 834,311 824,503 16,490 840,993 2063 4,561 5,247 9,807 840,993 831,186 16,624 847,809 2064 4,573 5,261 9,834 847,809 837,975 16,760 854,735 2065 4,561 5,247 9,807 854,735 844,927 16,899 861,826 2066 4,561 5,247 9,807 861,826 852,018 17,040 869,059 2067 5,000 5,000 869,059 864,059 17,281 881,340 2068 5,014 5,014 881,340 876,326 17,527 893,853 2069 5,000 5,000 893,853 888,853 17,777 906,630 2070 5,000 5,000 906,630 901,630 18,033 919,662 2071 5,000 5,000 919,662 914,662 18,293 932,956 2072 5,014 5,014 932,956 927,942 18,559 946,501 2073 5,000 5,000 946,501 941,501 18,830 960,331 2074 5,000 5,000 960,331 955,331 19,107 974,437 2075 5,000 5,000 974,437 969,437 19,389 988,826 2076 5,014 5,014 988,826 983,813 19,676 1,003,489 2077 5,000 5,000 1,003,489 998,489 19,970 1,018,459

Table 19 Decommissioning Cash Flow Analysis for LaSalle Unit 2 +/- SAFSTOR Total (thousands of 2025 dollars)

Year Radiological Decommissioning Cost ISFSI Decommissioning Cost Spent Fuel Management Cost Site Restoration Cost Total Cost(a)

BOY Trust Fund Value BOY Trust Fund Less Cost Trust Fund Earnings(b)

EOY Trust Fund Value(a) 2078 5,000 5,000 1,018,459 1,013,459 20,269 1,033,728 2079 5,000 5,000 1,033,728 1,028,728 20,575 1,049,302 2080 5,014 5,014 1,049,302 1,044,289 20,886 1,065,174 2081 5,000 5,000 1,065,174 1,060,174 21,203 1,081,378 2082 5,000 5,000 1,081,378 1,076,378 21,528 1,097,906 2083 5,000 5,000 1,097,906 1,092,906 21,858 1,114,764 2084 5,014 5,014 1,114,764 1,109,750 22,195 1,131,945 2085 5,000 5,000 1,131,945 1,126,945 22,539 1,149,484 2086 5,000 5,000 1,149,484 1,144,484 22,890 1,167,374 2087 5,000 5,000 1,167,374 1,162,374 23,247 1,185,621 2088 5,014 5,014 1,185,621 1,180,607 23,612 1,204,219 2089 5,000 5,000 1,204,219 1,199,219 23,984 1,223,204 2090 5,000 5,000 1,223,204 1,218,204 24,364 1,242,568 2091 5,000 5,000 1,242,568 1,237,568 24,751 1,262,319 2092 5,014 5,014 1,262,319 1,257,306 25,146 1,282,452 2093 5,000 5,000 1,282,452 1,277,452 25,549 1,303,001 2094 7,910 7

7,918 1,303,001 1,295,083 25,902 1,320,985 2095 45,962 135 46,097 1,320,985 1,274,888 25,498 1,300,385 2096 98,351 642 98,993 1,300,385 1,201,392 24,028 1,225,420 2097 98,082 640 98,723 1,225,420 1,126,697 22,534 1,149,231 2098 98,082 640 98,723 1,149,231 1,050,508 21,010 1,071,519 2099 93,172 884 94,056 1,071,519 977,462 19,549 997,012 2100 87,208 2,686 1,170 91,064 997,012 905,947 18,119 924,066 2101 56,063 7,145 630 63,837 924,066 860,229 17,205 877,434 2102 6,503 25,531 32,035 877,434 845,399 16,908 862,307 2103 36,114 36,114 862,307 826,193 16,524 842,717 2104 32,703 32,703 842,717 810,013 16,200 826,214 Totals (a) 1,049,033 9,830 247,871 99,379 1,406,113 (a) Cash flows may not add due to rounding (b) A 2 percent real rate of return is used as allowed by 10 CFR 50.75(e)(1)(i) 4 Parent Guarantee Qualification

Table 20 Parent Guarantee Qualification As of December 31, 2024 Parameter Value All decommissioning amounts covered by an NRC or Agreement State parent company guarantees or self-guarantee.

$0 All amounts covered by parent guarantees, self-guarantees, or financial tests of other Federal or State agencies (e.g. EPA)

$0 Creditworthiness criteria provided to NRC?

Tangible Net Worth

$12,883 million Total Net Worth

$13,539 million Total Assets in the United States

$51,941 million Criteria Met?

Tangible net worth of at least $21M?

Yes Total net worth at least six times the amount of decommissioning funds being assured by a parent guarantee for the total of all nuclear facilities or parts thereof (or prescribed amount, if certification is used)?

Yes Are at least 90 percent of the firm's assets located in the United States?

Or Assets located in the United States amount to at least six times the current decommissioning cost estimates?

Yes N/A