ML19087A153

Decommissioning Funding Status Report

ML19087A153
Person / Time
Site:	Three Mile Island
Issue date:	03/28/2019
From:	Halnon G GPU Nuclear
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
TMl-19-003
Download: ML19087A153 (84)

Text

{{#Wiki_filter:GPU Nuclear. Inc. Three Mile lslaOO Nuclear Station Route 441 South Post Office Box 480 M>ddletown, PA 17057 0480 Tel 717*948-8'161 March 28, 2019 TMl-19-003 10 CFR 50.75 10 CFR 50.82 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, D.C. 20555-0001

SUBJECT:

Three Mile Island Nuclear Station, Unit 2 Docket No. 50-320, License No. DPR-73 Decommissioning Funding Status Report for the Three Mile Island Nuclear Station. Unit 2 Pursuant to 10 CFR 50.75 and 10 CFR 50.82, GPU Nuclear, Inc. is hereby submitting the following three reports to the Nuclear Regulatory Commission (NRC) for Three Mile Island Nuclear Station, Unit 2 for the year ending December 31, 2018. Attachment 1 provides a decommissioning funding status report based on the NRC formula described in 10 CFR 50.75(c). Attachment 2 provides a decommissioning funding status report based upon a site-specific decommissioning cost estimate (DCE). A calculation was prepared based on withdrawals made in the period which shows a surplus in 2054, and this calculation is included in Attachment 2. Since the end of 2018, when the calculation was performed, the trust fund balance has recovered from approximately $791 million to approximately $843 million which further assures sufficient funding to fulfill decommissioning activities. contains a financial assurance status report as required by 10 CFR 50.82(a)(8)(v). Enclosure 1 is a copy of 2018 Decommissioning Cost Estimate for FirstEnergy, Three Mile Island, Unit 2, dated December 12, 2018 which forms the basis for this report. There are no regulatory commitments contained in this letter. If there are any questions or if additional information is required, please contact Mr. Michael Casey, GPU Nuclear Responsible Engineer TMl-2 at (330) 472-8589. Gr go . alnon President and Chief ~uclear Officer

Three Mile Island Nuclear Station, Unit 2 TMl-19-003 Page 2 Attachments:

1. Three Mile Island Nuclear Station, Unit 2 Decommissioning Funding Status Report - NRC Formula

2. Three Mile Island Nuclear Station, Unit 2 Decommissioning Funding Status Report -

Site-Specific Decommissioning Cost Estimate

3. Three Mile Island Nuclear Station, Unit 2 Financial Assurance Status Report

Enclosures:

1. 2018 Decommissioning Cost Estimate for FirstEnergy, Three Mile Island, Unit 2, dated December 12, 2018 cc: NRC Region I Administrator NRC Project Manager NRC Resident Inspector

Attachment 1 TMl-19-003 Three Mile Island Nuclear Station, Unit 2 Decommissioning Funding Status Report - NRC Formula Page 1 of 3 This report reflects the FirstEnergy Corp. subsidiary ownership interests in the Three Mile Island Nuclear Station, Unit 2 as of December 31, 2018.

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

Metropolitan Edison Company $251,098,549 Pennsylvania Electric Company 125,549,274 Jersey Central Power & Light Company 125,549,274 FirstEnergy Corp. Consolidated $502:197.097

2. The amount accumulated in external trust funds:

After Tax Metropolitan Edison Company $369,355,674 Pennsylvania Electric Company 194,608,821 Jersey Central Power & Light Company 227 ,863, 753 FirstEnergy Corp. Consolidated $791.828.248

3. There are no longer any funds being collected from the ratepayers.

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

Consolidated Ownership Interest in Unit 100% Estimated Net Investment Rate 2.00% Year of Site Restoration Completion 2053 Three Mile Island Nuclear Station, Unit 2 transitions from a Post-Defueling Monitored Storage status to decommissioning in 2040.

5. There are no contracts upon which the owners/licensees are relying pursuant to 10 CFR 50.75(e)(1)(v).

6. There are no modifications to the licensee's current method of providing financial assurance since the last submitted report.

TMl-19-003 Page 2 of 3

7. There were no amendments to the trust agreements for the above-mentioned owners of Three Mile Island Nuclear Station, Unit 2.

8. Mathematical rounding was performed during the development of the supporting calculations.

TMl-19-003 Page 3 of 3 Schedule 1 FIRSTENERGY CORP. Calculation of Minimum Financial Assurance Amount December 31, 2018 THREE MILE ISLAND NUCLEAR STATION, UNIT 2 Pennsylvania Regions Labor (L) = Northeast Energy (E) = National Waste Burial (B) = Generic For PWR Unit Adjustment Escalation Factor Ratio Factor1 L= 2.95 0.65 1.918 E= 2.365 0.13 0.307 B= 12.853 0.22 2.828 PWR Escalation Factor= 5.053 Base Amount for PWR between 1200 MWt and 3400 MWt = ($75 + 0.0088P) million (P = power level in megawatts thermal = 2772) ($75 + 0.0088(2772)) million = $99,393,600 Escalated Amount for unit1 = 99,393,600 x 5.053 = $502.197,097 Owner/Licensee 1 Ownership Pennsylvania Electric Company 25% $125,549,274 Jersey Central Power & Light Company 25% $125,549,274 Metropolitan Edison Company 50% !251,098,549 FirstEnergy Corp. Consolidated 100% $502, 197.097 Note 1: Mathematical rounding was performed during the development of the supporting calculations.

Attachment 2 TMl-19-003 Three Mile Island Nuclear Station, Unit 2 Decommissioning Funding Status Report - Site-Specific Decommissioning Cost Estimate Page 1of4

1. Decommissioning funds estimated to be required pursuant to 10 CFR 50.75(b) and (c) are based upon a site-specific decommissioning cost study, 2018 Decommissioning Cost Estimate for FirstEnergy, Three Mile Island, Unit 2, dated December 12, 2018:

NRC License Termination $1,320,506,000

2. The amount accumulated in external trust funds as of December 31, 2018:

After Tax Metropolitan Edison Company $369,355,674 Pennsylvania Electric Company 194,608,821 Jersey Central Power & Light Company _227,863,753 FirstEnergy Corp. Consolidated $791.828.248

3. There are no longer any funds being collected from the ratepayers.

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

Consolidated Ownership Interest in Unit 100% Estimated Rate of Escalation in Decommissioning Costs 0.00% Estimated After-Tax Rate of Return 2.00% Year of Site Restoration Completion 2053 Three Mile Island Nuclear Station, Unit 2 transitions from a Post-Defueling Monitored Storage status to decommissioning in 2040. All costs are based on a site-specific decommissioning cost study, 2018 Decommissioning Cost Estimate for FirstEnergy, Three Mile Island, Unit 2, dated December 12, 2018

5. There are no contracts upon which the owners/licensees are relying pursuant to 10 CFR 50.75(e)(1)(v).

6. There are no modifications to the licensee's current method of providing financial assurance since the last submitted report.

TMl-19-003 Page 2 of 4

7. There were no amendments to the trust agreements for the above-mentioned owners of Three Mile Island Nuclear Station, Unit 2.

8. Site-Specific Cost Analysis Assumptions 10 CFR 50.75(e)(1)(i), states, in part, that:

A licensee that has prepaid funds based on a site-specific estimate under 50.75(b)(1) of this section may take credit for projected earnings on the prepaid decommissioning trust funds, using up to a 2 percent annual real rate of return from the time of future funds' collection through the projected decommissioning period, provided that the site-specific estimate is based on a period of safe storage that is specifically described in the estimate. In accordance with Regulatory Guide 1.159, Revision 2, Assuring the Availability of Funds for Decommissioning Nuclear Reactors, a facility specific analysis may be used to demonstrate the adequacy of decommissioning funds, provided that: NRG-required cost estimate for decommissioning costs, as defined in 10 CFR 50.2, is equal to or greater than the amount stated in the formulas in 10 CFR 50.75(c)(1) and (2). The site-specific radiological decommissioning cost estimate is $1,320,506,000 which is greater than the 10 CFR 50.75(c) cost estimate of $502. 197,097. The analysis assumes a 2 percent yearly rate of return. The analysis also assumes a period of safe storage. The cash flows were contained in a decommissioning cost estimate that was prepared for Three Mile Island Nuclear Station, Unit 2. The cash flow analysis assumes the yearly expenses are incurred at the beginning of year. Schedule 1 provides the site-specific analysis. The analysis values are in 2018 dollars. The analysis is based on TMl-2 transitioning from Post-Defueling Monitored Storage status to decommissioning in 2040 and includes expenditures for license termination costs only.

9. Mathematical rounding was performed during the development of the supporting calculations.

10.

References:

A. 2018 Decommissioning Cost Estimate for FirstEnergy, Three Mile Island, Unit 2, dated December 12, 2018 (Enclosure 1) TMl-19-003 Page 3 of 4 Schedule 1 FIRSTENERGY CORP. Funding Analysis December 31, 2018 THREE MILE ISLAND NUCLEAR STATION, UNIT 2 After-Tax Estimated Net Investment Rate 2.00% Estimated Escalation Rate 0.00% Estimated After-Tax Rate of Return 2.00% Qualified Trust Balance on December 31, 2018 791.828 248 After-Tax Non-Qualified Trust Balance on December 31, 2018 Total 791.828.248 Beginning Ending Year Balance Deposits Earnings Withdrawal 1*2*3 Balance 2019 791,828,248 - 15,801,752 (3,481,304) 804, 148,696 2020 804, 148,696 - 16,048,161 (3,481,304) 816,715,553 2021 816,715,553 - 16,299,498 (3,481,304) 829,533,747 2022 829,533,747 - 16,555,862 (3,481,304) 842,608,305 2023 842,608,305 - 16,817,353 (3,481,304) 855,944,354 2024 855,944,354 - 17,084,074 (3,481,304) 869,547, 125 2025 869,547, 125 - 17,356, 129 (3,481,304) 883,421,950 2026 883,421,950 - 17,633,626 (3,481,304) 897,574,272 2027 897,574,272 - 17,916,672 (3,481,304) 912,009,641 2028 912,009,641 - 18,205,380 (3,481,304) 926,733,717 2029 926,733,717 - 18,499,861 (3,481,304) 941,752,274 2030 941,752,274 - 18,800,232 (3,481,304) 957,071,203 2031 957,071,203 - 19,106,611 (3,481,304) 972,696,510 2032 972,696,510 - 19,419, 117 (3,481,304) 988,634,323 2033 988,634,323 - 19,737,873 (3,481,304) 1,004,890,893 2034 1,004,890,893 - 20,063,005 (3,481,304) 1,021,472,594 2035 1,021,472,594 - 20,394,639 (3,481,304) 1,038,385,929 2036 1,038,385,929 - 20,732,906 (3,481,304) 1,055,637,530 2037 1,055,637,530 - 21,061,398 (5,135,244) 1,071,563,684 2038 1,071,563,684 - 21,366,024 (6,524,919) 1,086,404,790 2039 1,086,404,790 - 21,662,847 (6,524,919) 1,101 ,542,717 2040 1,101,542,717 - 21,857,830 (17,302,419) 1,106,098,129 2041 1, 106,098, 129 - 21,611,711 (51,025,115) 1,076,684,725 2042 1,076,684,725 - 20,376,757 (115,693,746) 981,367, 736 2043 981,367,736 - 18,452,185 (117,516,985) 882,302,936 2044 882,302,936 - 15,957,382 (168,867,661) 729,392,657 TMl-19-003 Page 4 of 4 Beginning Ending Year Balance Deposits Earnings Withdrawal 1 *2 *3 Balance 2045 729,392,657 - 12,898,334 (168,951,893) 573,339,098 2046 573,339,098 - 9,788,822 (167,795,966) 415,331,954 2047 415,331,954 - 7,832,705 (47,393,419) 375, 771,240 2048 375, 771,240 - 7,016,561 (49,886,381) 332,901,420 2049 332,901,420 - 5,868,519 (78,950,989) 259,818,950 2050 259,818,950 - 4,501,481 (69,489, 773) 194,830,657 2051 194,830,657 - 3,198,916 (69,769,758) 128,259,815 2052 128,259,815 - 1,848,111 (71,708,500) 58,399,427 2053 58,399,427 - 798,234 (36,975,500) 22,222,160 2054 4 22,222,160 - 361, 149 (8,329,433) 14,253,876 (1,320,506,090) ( 1) reflects Safstor method from Energy Solutions Scenario 2 Safstor 1, withdrawals assumed to be made in the middle of the period (2) There were no funds withdrawn from the decommissioning trust fund for years 2013, 2014, 2015, 2016, and 2017 (3) In 2018 $312,743.81 was withdrawn from the decommissioning trust fund for Decommissioning Planning (4) 2054 costs cover potential unresolved license termination invoices and costs from the previous years.

Attachment 3 TMl-19-003 Three Mile Island Nuclear Station, Unit 2 Financial Assurance Status Report Page 1 of 1

1. Formal decommissioning has not started at Three Mile Island Nuclear Station, Unit 2. A special disbursement of decommissioning trust funds occurred in 2005 for $416,400.00.

Notification of this use of decommissioning funds was made to the NRC by letter dated February 1, 2005 (Accession No. ML050380143). $312,743.81 was spent on decommissioning planning activities in 2018.

2. Decommissioning funds estimated to be required are based upon a site-specific decommissioning cost study, 2018 Decommissioning Cost Estimate for FirstEnergy, Three Mile Island, Unit 2, dated December 12, 2018:

NRC License Termination $1,320,506,000 As noted on Attachment 2, Schedule 1, FirstEnergy Corp. Funding Analysis dated December 31, 2018.

3. The amount accumulated in external trust funds as of December 31, 2018:

After Tax Metropolitan Edison Company $369,355,674 Pennsylvania Electric Company 194,608,821 Jersey Central Power & Lfght Company 227,863,753 FirstEnergy Corp. Consolidated $791.828.248

4. There are no longer any funds being collected from the ratepayers.

5. There are no modifications to the licensee's current method of providing financial assurance since the last submitted report.

6. There were no amendments to the trust agreements for the above-mentioned owners of Three Mile Island Nuclear Station, Unit 2.

7. Mathematical rounding was performed during the development of the supporting calculations.

8.

References:

A. 2018 Decommissioning Cost Estimate for FirstEnergy, Three Mile Island, Unit 2, dated December 12, 2018 (Enclosure 1)

Enclosure 1 TMI-19-003

       ~

ENERGYSOLlJTJoNs Document No. 164059-DCE-01 2018 Decommissioning Cost Estimate for FirstEnergy, Three Mile Island, Unit 2 Project No. 164059 Final RevO Prepared for: GPU Nuclear Inc. Prepared by: EnergySolutions, LLC Authored By: ~~l:l, 2.o18 Mark Rademacher, Estimating Director Date Reviewed By: ~~,1.J~ Michael S. Williams, Senior D&D Specialist Date Approved By Date I IX] New Report D Trtle Change D Report Revision D Report Rewrite Effective December 14, 2018 Date:

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev. O Revision Log No. Date Reason for Revision ltem(s) Revised 0 12/14/18 Original Submittal Page 2 of 40

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev.a Table of Contents 1.0 EXECUTIVE

SUMMARY

............................................................................................................... 6

2.0 INTRODUCTION

....................................................................................................................... 11 2.1    Study Objective ............................................................................................................ 11 2.2    Regulatory Framework ................................................................................................ 12 2.3    Decommissioning Alternatives .................................................................................... 12 2.4    Post-Shutdown Spent Fuel Management Alternatives ............................................... 13 3.0    STUDY METHODOLOGY ........................................................................................................... 14 3.1     General Description ..................................................................................................... 14 3.2    Schedule Analysis ......................................................................................................... 14 3.3     Decommissioning Staff ................................................................................................ 15 3.4    Waste Disposal ............................................................................................................. 15 3.5     Final Status Survey ....................................................................................................... 17 3.6     Contingency ................................................................................................................. 18 3.7     Cost Reporting ............................................................................................................. 19 4.0    SITE SPECIFIC TECHNICAL APPROACH ..................................................................................... 20 4.1     Facility Description ... .................................................................................................... 20 4.2     Decommissioning Phases (Periods) .. ;.......................................................................... 20 4.3     Decommissioning Staff ................................................................................................ 25 4.4    Spent Fuel Management .............................................................................................. 25 4.5    Spent Fuel Shipments .................................................................................................. 25 5.0    BASES OF ESTIMATE AND KEY ASSUMPTIONS ........................................................................ 26 6.0    STUDY RESULTS ....................................................................................................................... 30

7.0 REFERENCES

............................................................................................................................ 40 Page 3 of 40

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev. O Tables Table 1-1 Decommissioning Cost Summary ....................................................................................... 7 Table 2-1 SNF/GTCC Costs Associated with ISFSI ............................................................................. 13 Table 6-1 Cost Summary by Phase ................................................................................................... 30 Table 6-2 DECON Cost Summary by Phase ....................................................................................... 34 Table 6-3 DECON Cost Summary by Cost Type ................................................................................34 Table 6-4 SAFSTORl Cost Summary by Phase ..................................................................................35 Table 6-5 SAFSTORl Cost Summary by Cost Type ............................................................................ 35 Table 6-6 SAFSTOR2 Cost Summary by Phase .................................................................................. 36 Table 6-7 SAFSTOR2 Cost Summary by Cost Type ............................................................................ 36 Table 6-8 Staffing for Phase 1- Source Term Reduction ................................................................. 37 Table 6-9 Staffing for Phase 2 - D&D and License Termination ....................................................... 37 Table 6-10 Waste Disposal Volumes .................................................................................................. 38 Table 6-11 Current DCE Comparison to PSDAR Estimate ................................................................... 39 Figures Figure 1-1 Summary Schedule- DECON .............................................................................................. 8 Figure 1-2 Summary Schedule - SAFSTORl ......................................................................................... 9 Figure 1-3 Summary Schedule - SAFSTOR2 ....................................................................................... 10 Figure 6-1 Summary Schedule - DECON ............................................................................................ 31 Figure 6-2 Summary Schedule - SAFSTORl ....................................................................................... 32 Figure 6-3 Summary Schedule -SAFSTOR2 ....................................................................................... 33 Figure 6-4 Combined Staffing for Phase 1 and 2 ............................................................................... 38 Appendices Appendix A List of Systems and Structures Appendix B Waste Disposal Summary Appendix C Detailed Project Schedules Appendix D Detailed Cost Estimates Appendix E Annual Spending Tables Appendix F Annual Spending Comparison to Previous Estimates Page 4 of40

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev.a Acronyms and Abbreviations AIF Atomic Industrial Forum ALARA As Low As Reasonably Achievable BWR Boiling Water Reactors CFR Code of Federal Regulations D&D Decontamination & Decommissioning DAW Dry Active Waste DCE Decommissioning Cost Estimate DGC Decommissioning General Contractor DOE U.S. Department of Energy DSAR Defueled Safety Analysis Report ES EnergySo/utions FSS Final Status Survey GPUN GPU Nuclear, Inc. GTCC Greater Than Class C Waste HP Health Physics ISFSI Independent Spent Fuel Storage Installation JCP&L Jersey Central Power & Light LLRW Low-Level Radioactive Waste LTP License Termination Plan MARSSIM Multi-Agency Radiation Survey and Site Investigation Manual MET-ED Metropolitan Edison MWt Megawatt thermal NRC Nuclear Regulatory Commission NSSS Nuclear Steam Supply System ORISE Oak Ridge Institute for Science and Education PCB Polychlorinated Biphenyl PDMS Post-Defueling Monitored Storage PENELEC Pennsylvania Electric Company PS DAR Post-Shutdown Decommissioning Activities Report PWR Pressurized Water Reactor SNF Spent Nuclear Fuel TMI Three Mile Island Nuclear Generating Station TMl-1 Three Mile Island, Unit 1 TMl-2 Three Mile Island, Unit 2 WBS Work Breakdown Structure wcs Waste Control Specialists LLC UCF Unit Cost Factor Page 5of40

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev. O 1.0 EXECUTIVE

SUMMARY

GPU Nuclear, Inc. (GPUN), acting for itself and for the Metropolitan Edison Company, Jersey Central Power and Light Company, and the Pennsylvania Electric Company, contracted with EnergySolutions LLC, for the preparation of this Report. The report presents the 2018 Decommissioning Cost Estimate (DCE) Study of the Three Mile Island Unit-2 Nuclear Station (TMl-2), hereinafter referred to as the 2018 Cost Study. The Three Mile Island Unit-2 Nuclear Generating Station is owned by GPU Nuclear a fully owned subsidiary of First Energy. The March 28, 1979 nuclear accident resulted in the permanent cessation of operations at TMl-2. Following an intensive 15-year recovery process that resulted in the removal and shipment of "'99% of the damaged reactor fuel, the plant was placed into an approved monitored storage program referred to as "Post-Defueling Monitored Storage (PDMS)" in 1993. FirstEnergy via its GPU Nuclear subsidiary has the responsibility to decommission the TMl-2 station. In April 2018 GPU Nuclear contracted with EnergySolutions to evaluate decommissioning alternatives and assist in the development of a draft decommissioning schedule, staffing plan, detailed cost tables in constant 2018 dollars, annual expenditures in constant 2018 dollars and a comparison analysis between this study and the prior TLG Services, Inc. study. This study has been performed to furnish an estimate of the costs for license termination under three specified scenarios as follows: DECON-based upon the TMl-2 decommissioning effort commencing in 2019 and coordinated with the TMl-1 decommissioning effort. It is assumed that the TMl-1 decommissioning effort will include appropriate time for TMl-1 fuel offload to an Independent Spent Fuel Storage Installation (ISFSI) and that the active TMl-2 decommissioning effort will start at that point. This scenario includes PDMS costs incurred between the 2018 start date and commencement of decommissioning activities. License termination forTMl-2 is not to proceed beyond 2053. SAFSTORl - based on TMl-1 placed into long-term SAFSTOR upon completion of commercial operations at some point between 2019 and 2034. The TMl-1 and TMl-2 decommissioning efforts will be completed as independent activities with the assumption that TM-2 decommissioning would complete prior to commencement of TMl-1 decommissioning. The TMl-2 PDMS activities continue under the existing TMl-2 Monitoring Agreement with Exelon through completion of TMl-1 fuel off-load to the iSFSI, at which time 100% of these activities become the responsibility of FirstEnergy (GPU Nuclear). Completion of TMl-2 SAFSTOR activities will occur in 2053. SAFSTOR2- based on TMl-1 shutting down between 2019 and 2034 and utilizing a 60-year SAFSTOR period. TMl-2 would seek an extension of the TMl-2 SAFSTOR period beyond its current license termination date of 2053 in order to coordinate decommissioning with the TMl-1 SAFSTOR decommissioning effort. This scenario includes PDMS costs incurred between the 2018 start date and commencement of decommissioning activities. The cost estimate results are provided in Table 1-1. This table provides License Termination cost (corresponding to 10 CFR 50.75(c) requirements); Spent Fuel Management costs (corresponding to 10 CFR 50.54(bb) requirements) and Site Restoration costs (corresponding to activities such as clean building demolition and site grading etc.). Page 6 of 40

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-Ol FirstEnergy Three Mile Island, Unit 2 Rev.O TABLE 1-1 Decommissioning Cost Summary (thousands of 2018 dollars) License Termination Spent Fuel Site Restoration Total Scenario 1 - DECON 1,152,465 92,815 54,088 1,299,368 Scenario 2 - SAFSTORl 1,183,939 82,662 53,905 1,320,506 Scenario 3 - SAFSTOR2 1,325,700 82,662 53,831 1,462,193 Costs for Greater Than Class C (GTCC) casks, operations, storage and disposition are included in the License Termination Costs. This estimate is based on site-specific plant systems and buildings inventories. These inventories, EnergySolutions proprietary Unit Cost Factors (UCFs) and historical data, were used to generate required man-hours, costs, waste volume, weight and classification. Schedules reflect the effects of sequenced activity-dependent or distributed decommissioning elements such as planning and preparations, major component removal, building decontamination, building demolition, etc. The costs and schedule for the DECON scenario is divided into three major project phases (periods) and presented by: Phase 1- Source Term Risk Reduction Phase 2 - Decommissioning and License Termination subtleties Phase 3 - Spent Nuclear Fuel (SNF) /GTCC Storage and Disposition The costs and schedule for the SAFSTOR scenarios are divided into major project phases (periods) and presented by: Phase 0 - SAFSTOR Phase 1- Source Term Risk Reduction Phase 2 - Decommissioning and License Termination Figures 1-1, 1-2 and 1-3 below show summary-level schedules for each of the Scenarios. Page 7of40

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev.a Figure 1-1 below shows a summary-level DECON schedule. FIGURE 1-1 Summary Schedule - DECON NRCApprove Ucens* Amendments NRCApprov1 Ph1se S Complete J1nZOZS Ucen.. Termination I SNF/ GTtC to DOE Dec ZOSS Phase 1- Site Upgrades & Preparations I Phase 1- Source Term Reduction I Phase 2 - Planning a Transition Phase 2 - Decontamination & Decommission Phase 2 - Site Restonitlon SNF/GTCC Transfer to DOE Decommission Storage Faclllty Page 8 of40

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev.O Figures 1-2 below shows a summary-level SAFSTORl schedule. FIGURE 1-2 Summary Schedule - SAFSTORl Phue I Complete Ph1n 2 Complete J*n2047 t4 SNF/GTCC DOE NRCApprove NRCApprove Unit 1 Shutdown Ucense Amendments Ucense Tennlnetlon Dec2019 J1n2041 Dec205~ j. 7019 2022 )02~ 20)8 ?031 ?034 ?017 ?O~O ?OJJ 704b ~Q4q ?0~} 1 Phase 1

• Planning & Licensing Phase 1- Site Upgrades & Preparations Phase 1- Source Term Reduction Phase 2 - Pl1nnln1 Phase 2 - Decont1mln1tlon & Decommlssl Page 9of40

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev.O Figures 1-3 below shows a summary-level SAFSTOR2 schedule. FIGURE 1-3 Summary Schedule - SAFSTOR2 Phase I Complete Phlae 2 Complete Jan2088 SNF/GTCCtopOE NRCApprove Unit 1 Shutdown Ucenae Termination Dec2019 Oec209 Phase 1- Planning & licensing Phase 1- Site Upgrades & Preparations Phase 1 - Source Term Reduction Phase 2 - Decontamination Phase 2 Page 10 of 40

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev. O

2.0 INTRODUCTION

2.1 Study Objective This report presents the 2018 Decommissioning Cost Estimate Study of the Three Mile Island Unit-2 Nuclear Station, hereinafter referred to as the 2018 Cost Study. The Three Mile Island Nuclear Station is owned by FirstEnergy via its wholly owned subsidiary GPU Nuclear. The TMl-2 ownership is comprised of: Metropolitan Edison (MET-ED); Pennsylvania Electric Company (PENELEC); and Jersey Central Power and Light (JCP&L). Ownership is reflected as follows:

• MET-ED - 50%
• PENELEC- 25%
• JCP&L-25%

This study has been performed to provide FirstEnergy with an updated Decommissioning Cost Estimate relative to the aforementioned specific decommissioning options. It addresses: (1) the decommissioning of TMl-2 to the extent required to terminate the plant's possession-only license, (2) management of residual spent fuel until acceptance by the U.S. Department of Energy (DOE), and (3) demolition of uncontaminated structures and restoration of the site. The terms Spent Nuclear Fuel (SNF) and spent fuel are used interchangeably in this study. The study methodology follows the basic approach originally presented in the Atomic Industrial Forum/National Environmental Studies Project Report AIF/NESP-036, "Guidelines for Producing Commercial Nuclear Power Plant Decommissioning Cost Estimates" (Ref. No. 2). The report was prepared in accordance with Nuclear Regulatory Commission (NRC) Regulatory Guide 1.202, "Standard Format and Content of Decommissioning Cost Estimates for Nuclear Power Reactors" (Ref. No. 3). The estimate is based on compliance with current regulatory requirements and proven decommissioning technologies. NRC requirements, set forth in Title 10 of the Code of Federal Regulations (CFR), differentiate between the post-shutdown costs associated with the decommissioning of the nuclear plant facility, those associated with storage of spent fuel on-site, and those associated with the decommissioning of a spent fuel storage facility. The Code of Federal Regulations, however, does not address the entire scope of the decommissioning liability for each nuclear facility. 10 CFR 50.75(c) requires funding by the licensee(s) of the facility for the decommissioning program, but specifically excludes the cost of removal and disposal of spent fuel and structures that do not require disposal as radioactive material. 10 CFR 50.75(c) also excludes the cost of site restoration activities that do not involve the removal of residual radioactivity necessary to terminate the NRC license(s). 10 CFR 50.54(bb) requires funding by the licensee(s) "for the management of all irradiated fuel at the reactor upon expiration of the reactor operating license(s) until title to the irradiated fuel and possession of the fuel is transferred to the Secretary of Energy for its ultimate disposal in a repository." 10 CFR 72.30 requires funding for decommissioning of the on-site spent fuel storage facility after the irradiated fuel is accepted by the DOE. This study analyzes the following technical approaches to decommissioning as defined by FirstEnergy/GPU Nuclear. DECON - based upon the TMl-2 decommissioning effort commencing in 2019 and coordinated with the TMl-1 decommissioning effort. It is assumed that the TMl-1 decommissioning effort will include appropriate time for TMl-1 fuel offload to an Independent Spent Fuel Storage Installation (ISFSI) and that the active TMl-2 Page 11 of40

2018 Decommissioning Cost Estimate for Document No. 1640S9-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev.O decommissioning effort will start at that point. This scenario includes PDMS costs incurred between the 2018 start date and commencement of decommissioning activities. License termination forTMl-2 is not to proceed beyond 20S3. SAFSTORl - based on TMl-1 placed into long-term SAFSTOR upon completion of commercial operations at some point between 2019 and 2034. The TMl-1 and TMl-2 decommissioning efforts will be completed as independent activities with the assumption that TM-2 decommissioning would complete prior to commencement of TMl-1 decommissioning. The TMl-2 PDMS activities continue under the existing TMl-2 Monitoring Agreement with Exelon through completion of TMl-1 fuel off-load to the ISFSI, at which time 100% of these activities become the responsibility of FirstEnergy (GPU Nuclear). Completion of TMl-2 SAFSTOR activities will occur in 20S3. SAFSTOR2 - based on TMl-1 shutting down between 2019 and 2034 and utilizing a 60-year SAFSTOR period. TMl -2 would seek an extension of the TMl-2 SAFSTOR period beyond its current license termination date of 20S3 in order to coordinate decommissioning with the TMl-1 SAFSTOR decommissioning effort. This scenario includes PDMS costs incurred between the 2018 start date and commencement of decommissioning activities. 2.2 Regulatory Framework Provisions of current laws and regulations affecting decommissioning, waste management, and spent fuel management are as follows:

1. NRC regulations require a license for on-site storage of spent fuel. Wet storage in a spent fuel pool is authorized by a facility's 10 CFR Part SO license (Ref. 1). On-site dry storage of spent fuel at an Independent Spent Fuel Storage Installation (ISFSI) is licensed by either: (a) the general license set forth in 10 CFR 72.210, which requires that a Part SO license be in place; or (b) a site-specific ISFSI license issued pursuant to 10 CFR Part 72.

2. 10 CFR S0.7S(c) requires funding by the licensee(s) of the facility for decommissioning.

3. 10 CFR SO.S4(bb) requires the licensee(s), within two years following permanent cessation of operation of the reactor or five years before expiration of the operating license(s), whichever occurs first, to submit written notification to the NRC for its review and preliminary approval of the program by which the licensee intends to manage and provide funding "for the management of all irradiated fuel at the reactor upon expiration of the reactor operating license until title to the irradiated fuel and possession of the fuel is transferred to the Secretary of Energy for its ultimate disposal in a repository."

2.3 Decommissioning Alternatives The three basic methods for decommissioning are DECON, SAFSTOR, and ENTOMB, which are summarized as follows :

1. DECON: The equipment, structures, and portions of the facility and site that contain radioactive contaminants are promptly removed or decontaminated to a level that permits termination of the license after cessation of operations.

Page 12 of40

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev. a

2. SAFSTOR: The facility is placed in a safe, stable condition and maintained in that state (safe storage).

The facility is decontaminated and dismantled at the end of the storage period to levels that permit license termination. NRC regulations require decommissioning to be completed within 60 years of cessation of operation.

3. ENTOMB: Radioactive structures, systems, and components are encased in a structurally long-lived substance, such as concrete. The entombed structure is appropriately maintained and monitored until radioactivity decays to a level that permits termination of the license. Since entombment will exceed the requirement for decommissioning to be completed within 60 years of cessation of operation, NRC handles entombment requests on a case-by-case basis.

2.4 Post-Shutdown Spent Fuel Management Alternatives The options for long-term post-shutdown spent fuel management currently available to power plant operators are (1) wet storage consisting of continued maintenance and operation of the spent fuel pool, and (2) dry storage consisting of transfer of spent fuel from the fuel pool to onsite dry storage modules after a cooling period or any combination of the two. The present case at TMl-2, because it is an 'accident plant,' differs in that the bulk of the Spent Nuclear Fuel (SNF) was shipped off site during the accident recovery phase with only ~1% remaining within the plant's structures, systems and components. Transfer of recovered spent fuel to an ISFSI requires additional expenditures for purchase and construction of the ISFSI and dismantlement and disposal of the ISFSI following completion of spent fuel transfer to DOE. GPUN is considering alternatives for the disposition of the remaining spent fuel. These options are as follows: (1) Transfer to the DOE under a program similar to that used during the accident recovery spent fuel disposition program. (2) Transfer to an as yet to be developed, privately owned Interim Spent Nuclear Fuel Storage Facility. (3) Storage of the TMl-2 spent fuel at the TMl-1 ISFSI per a negotiated agreement with the TMl-1 owner. The following Table 2-1 shows the costs contained in this report associated with the construction, security operation and decommissioning of an ISFSI for the on-site storage of SNF/GTCC. TABLE 2-1 SNF/GTCC Costs associated with ISFSI (thousands of 2018 dollars) lb.3 SNF/GTCC Interim Storage Facility $ 8,580 lf.3 Security Staff & Equipment $ 19,780 3a.l SNF/GTCC Storage Facility Security & Operations $ 52,440 3a.3 SNF/GTCC Storage Facility Decommission $ 2,880 Total $ 83,680 Page 13 of40

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev. 0 3.0 STUDY METHODOLOGY 3.1 General Description EnergySolutions maintains a proprietary decommissioning cost model based upon the fundamental technical approach established in AIF/NESP-036, "Guidelines for Producing Commercial Nuclear Power Plant Decommissioning Cost Estimates," dated May 1986 (Ref. No. 2). The cost model has been updated frequently in accordance with regulatory requirements and industry experience. The cost model includes elements for estimating distributed and undistributed costs. Distributed costs are activity specific and include planning and preparation costs as well as costs for decontamination, packaging, disposal, and removal of major components and systems. For example, costs for the segmentation, packaging, and disposal of the reactor internals are distributed costs. Undistributed costs, sometimes referred to as collateral costs, are typically time dependent costs such as utility (Licensee) and decommissioning general contractor staff, property taxes, insurance, regulatory fees and permits, energy costs, and security staff. The methodology for preparing cost estimates for a selected decommissioning alternative requires development of a site-specific detailed work activity sequence based upon the plant inventory. The activity sequence is used to define the labor, material, equipment, energy resources, and duration required for each activity. In the case of major components, individual work sequence activity analyses are performed based on the physical and radiological characteristics of the component, and the packaging, transportation, and disposal options available. In the case of structures and small components and equipment such as piping, pumps, and tanks, the work durations and costs are calculated based on UCFs. UCFs are economic parameters developed to express costs per unit of work output, piece of equipment, or time. They are developed using decommissioning experience, information on the latest technology applicable to decommissioning, and engineering judgment. The total cost of a specific decommissioning activity can be determined by multiplying the total number of units associated with that activity by the UCF, expressed as $/unit, for that activity. For example, the estimated demolition cost of a non-contaminated concrete structure can be obtained by multiplying the volume of concrete in the structure by the UCF for non-contaminated reinforced concrete demolition, expressed in $/unit volume. Each UCF has associated with it a man-hours/unit and schedule-hours/unit. From these values, total man-hours and total schedule-hours can be estimated for a particular activity. 3.2 Schedule Analysis After the work activity durations are calculated for all distributed activities, a schedule analysis is performed using Oracle Primavera PG. The schedule accounts for constraints and regulatory reviews. The schedule is typically delineated into phases or time periods that differentiate between direct costs requirements and undistributed costs. In order to differentiate between phase (period) elements of the decommissioning scope of work, EnergySolutions has established a Work Breakdown Structure (WBS) and cost accounting system to treat each element as a subproject. Accordingly, the overall project schedule is divided into interrelated periods with major milestones defining the beginning and ending of each period. The major milestones also serve as the basis for integrating the periods of the three subprojects. Page 14 of40

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev.a 3.3 Decommissioning Staff EnergySolutions has assumed that the TMl-2 decommissioning project will be performed in an efficiently planned and executed manner using project personnel experienced in decommissioning and large-scale project management. This DCE also assumes that the decommissioning work will be performed by a highly experienced and qualified Decommissioning General Contractor (DGC), with oversight and management of the decommissioning operations performed by the Licensee staff. It is also assumed that the Licensee staff will be supplemented by a professional consulting engineering firm, particularly in the planning and preparation phase. EnergySolutions analyzed the TMl-2 licensee staffing needs and developed a site-specific staffing plan. Since there is no incumbent TMl-2 staff during PDMS, there is no existing salary structure for use as the basis for calculating Licensee staff labor costs. Staff and DGC Labor costs were therefore developed by EnergySolutions utilizing ES historical data. Staffing levels, for both staffing plans and for each project period, are based on the Atomic Industrial Forum (AIF) guidelines, industry and ES historical experience. The sizes of the staffs are varied in each period in accordance with the requirements of the work activities. Staffing has been organized into the following departments or functional groups: Management & Administrative Engineering Plant Operations & Maintenance Radiation Protection and Chemistry Health Physics Regulatory Affairs Quality Waste Operations Security DGC Staff 3.4 Waste Disposal Waste management costs comprise a significant portion of the decommissioning cost estimate. Additionally, limited future access to disposal sites licensed for receipt of Class Band C wastes introduces a significant level of uncertainty with respect to the appropriateness of using existing rate structures to estimate disposal costs of these wastes. EnergySolutions' approach to estimating waste disposal costs is discussed in the following paragraphs. Waste Classification Regulations governing disposal of radioactive waste are stringent in order to ensure control of the waste and preclude adverse impact on public health and safety. At present, LLRW disposal is controlled by 10 CFR 61, which went into effect in December 1983. This regulation stipulates the criteria for the establishment and operation of shallow-land LLRW burial facilities. Embodied within this regulation are criteria and classifications for packaging LLRW such that it is acceptable for burial at licensed LLRW disposal sites. For each waste classification, 10 CFR 61 stipulates specific criteria for physical and chemical properties that the LLRW must meet in order to be accepted at a licensed disposal site. The LLRW disposal criteria of Page 15 of 40

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev. O 10 CFR 61 require that LLRW generators determine the proportional amount of a number of specific radioactive isotopes present in each container of disposable LLRW. This requirement for isotopic analysis of each container of disposable LLRW is met by employing a combination of analytical techniques such as computerized analyses based upon scaling factors, sample laboratory analyses, and direct assay methods. Having performed an isotopic analysis of each container of disposable LLRW, the waste must then be classified according to one of the classifications (Class A, B, C, or Greater Than Class C (GTCC)) as defined in 10 CFR 61. EnergySolutions' classification of LLRW resulting from decommissioning activities is based on AIF/NESP-036 (Ref. No. 2), NUREG/CR-0130 (Ref. No. 4), plant-specific information and recent industry experience. The estimated curie content of the reactor vessel and internals at shutdown is typically derived from NUREG/CR-0130 for Pressurized Water Reactors (PWRs) and NUREG/CR-0672 for Boiling Water Reactors (BWRs) and adjusted for the different mass of components and period of decay. In the case of TMl-2 and due to the accident event, such derivations are not considered applicable and plant-specific data and information were utilized. The TMl-2 Defueling Completion Report (Ref. No. 7) and related documents and reports were used to develop the approximate and conservative wastes classifications for purposes of the 2018 DCE. Packaging Selection of the type and quantity of containers required for Class B and C wastes is based on the most restrictive of either Curie-content, dose-rate, container weight limit, or container volume limit. Residual spent fuel and GTCC wastes from segmentation of the reactor vessel internals and other accident related waste is normally packaged in modified spent fuel canisters and this packaging is assumed for the DCE. The selection of container type for Class A waste is based on the transportation mode (rail, truck, barge, etc.) and waste form . The quantity of Class A waste containers is determined by the most restrictive of either container weight limit or container volume limit. Large components, such as steam generators, pressurizers, and reactor recirculation pumps, are shipped as their own containers with additional shielding as required. Container costs are obtained from manufacturers specializing in the design and fabrication of storage containers for nuclear materials. Shielded transport cask and liner costs are obtained from the cask owners and operators. Transportation Transportation routes to processing and disposal facilities are determined based on available transportation modes (truck, rail, barge, or combinations). Transportation costs for the selected routes and modes are obtained from vendor quotes or published tariffs whenever possible. Class-A Disposal Options and Rates Class A waste that meets the waste acceptance criteria are to be disposed of at EnergySo/utions' LLRW disposal facility in Clive, Utah. All reported waste disposal costs include packaging, transportation and any applicable surcharges. Class B and C Disposal Options and Rates Currently, within the United States, there are only three operational commercial near-surface disposal facilities licensed to accept Class Band C LLRW: the Barnwell facility, operated by EnergySolutions in Barnwell, South Carolina; the U.S. Ecology facility in Richland, Washington; and the facility in Andrews County, Texas, operated by Waste Control Specialists. Barnwell only accepts waste from states within the Atlantic Compact and U.S. Ecology only accepts waste from states within the Northwest and Rocky Mountain Compacts. Page 16of40

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev.O However, the WCS facility will accept waste from the Texas Compact (comprised of Texas and Vermont) and from non-Compact generators. The Texas Compact Commission on March 23, 2012, approved amendments to rules allowing the import of non-compact generator LLRW for disposal at the WCS Andrews County facility. Greater-Than-Class-C (GTCC) Wastes identified as 10 CFR 61 Class A, B, and C may be disposed of at near-surface disposal facilities. Certain components are highly activated and may exceed the radionuclide concentration limitations for 10 CFR 61 Class C waste. In accordance with 10 CFR 61, these components, which are referred to as GTCC wastes, cannot be disposed of in a near-surface LLRW disposal facility and must be transferred to a geologic repository or a similar site approved by the NRC. Highly activated sections of the reactor vessel internals and certain decommissioning processes will result in GTCC waste. Presently, a facility does not exist for the disposal of wastes exceeding 10 CFR 61 Class C limitations. EnergySolutions assumes that the DOE will accept this waste along with spent fuel. Although courts have held that DOE is obligated to accept and dispose of GTCC, issues regarding potential costs remain unsettled. Therefore, EnergySolutions conservatively estimates a GTCC waste disposal cost. EnergySo/utions assumes that the GTCC waste will be packaged in modified spent fuel canisters, or similar containers, and will be shipped to a storage or disposal facility operated by DOE along with the spent fuel. This DCE is based upon a negotiated agreement with the owner of TMl-1 for the storage of residual spent fuel and GTCC waste. This includes sharing costs for the design and construction of an ISFSI and/or interim storage facility, security and operations. The DCE also assumes that costs for equipment, load out of SNF/GTCC and the decommissioning of the storage facility will be shared with the owner ofTMl-1. The full cost of packaging, transportation and disposal for TMl-2 residual spent fuel and GTCC waste is included in the TMl-2 estimate. LLRW Volume Reduction Because current Class A LLRW disposal rates are significantly lower than LLRW volume reduction rates, EnergySolutions does not assume on-site volume reduction techniques such as waste compaction or an aggressive decontamination, survey and release effort. Non-Radioactive Non-Hazardous Waste Disposal EnergySolutions assumes that recyclable, non-radioactive scrap metal resulting from the decommissioning program will be sold to a scrap metal dealer. Hazardous and Industrial Waste Disposal Uncontaminated lead shielding remaining after shutdown was assumed to be removed from its installed locations and shipped offsite by entities having a need for the material. The entities will receive the lead at no charge in return for providing the removal and shipping services. Non-Radioactive contaminated surfaces coated with tightly adhering and undamaged lead-based paint will be removed as non-hazardous building demolition debris. All other chemicals and hazardous materials present at shutdown will be removed and properly disposed of during decommissioning. 3.5 Final Status Survey The cost of performing a final status survey (FSS) is based on NUREG-1575, " Multi-Agency Radiation Survey and Site Investigation Manual (MARSSIM)" (Ref. No. 5). Estimates of MARSSIM Class I, II, and Ill survey Page 17 of 40

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev.O designations are based on radiological assumptions regarding contamination resulting from small and large component removal activities. The FSS activity cost calculation includes the in-place remote survey of underground metal and concrete pipe, soil, and groundwater sampling and analysis. Estimated costs for NRC and Oak Ridge Institute for Science and Education (ORISE) verification are also included, and the NRC review period is incorporated into the project schedule. 3.6 Contingency Contingencies are applied to cost estimates primarily to allow for unknown or unplanned occurrences during the actual program, e.g., increased radioactive waste materials volumes over that expected; equipment breakdowns, weather delays, and labor strikes. This is consistent with the definition provided in the DOE Cost Estimating Guide, DOE G 430.1-1, 3-28-97 (DOE G) (Ref. No. 6). Contingency "covers costs that may result from incomplete design, unforeseen and unpredictable conditions, or uncertainties within the defined project scope. The amount of contingency will depend on the status of design, procurement, and construction; and the complexity and uncertainties of the component parts of the project. Contingency is not to be used to avoid making an accurate assessment of expected costs." EnergySolutions determines site-specific contingency factors to be applied to each estimate based on industry practices. The DOE has established a recommended range of contingencies as a function of completeness of program design, DOE G. The ranges are: Contingency Range Type of Estimate as a% of Total Estimate Planning Phase Estimate 20-30 Budget Estimate 15-25 Title I {Preliminary Design Estimate) 10-20 Title II (Definitive Design Estimate) 5-15 Phase 1- Source Term Reduction poses very unique high risks considering the history of TMl-2. This includes design and procurement of remote and/or robotic equipment for remote operations, design and developed shielded transfer and storage for high source term waste, removal and consolidation remaining residual nuclear fuel, and removal of high source term non-fuel radioactive materials. The contingencies presented in this study are consistent with industry standards as follows: Phase 1- Source Term Reduction 28.0% Phase 2 - Decommissioning and License Termination 17.4% Phase 3- SNF I GTCC Interim Storage & Disposition 22.2% Composite Contingency 24.3% A reactor decommissioning program will be conducted under an NRC-approved Quality Assurance Program which meets the requirements of 10 CFR 50, Appendix B. However, the development of the quality assurance program, the performance of work under that program, and the effort required to ensure compliance with the program, is already included in the detailed cost estimate. Therefore, EnergySolutions does not include quality assurance as an element of the contingency allowance. The same is true for contamination. Where radioactive contamination or activated materials are dealt with, the EnergySolutions UCFs and associated calculations fully reflect the cost impact of that material, and a separate contingency is not required specifically due to working with contamination. Page 18of40

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev.a 3.7 Cost Reporting Total project costs are aggregated from the distributed activity and undistributed costs into the following categories - Labor, Materials and Equipment, Waste Packaging, Waste Transportation, Waste Disposal, and Other Costs. Other costs include property taxes, insurance, license fees, permits, and energy. Waste Disposal costs include any applicable surcharges. Health physics (HP) supplies and small tool costs are calculated as a component of each distributed activity cost and included in the category of Material and Equipment, with the exception that HP supplies for the Utility HP staff are calculated and reported as an undistributed line item. A line item specific contingency is then calculated for each activity cost element. Page 19 of 40

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev.O 4.0 SITE SPECIFIC TECHNICAL APPROACH 4.1 Facility Description The Three Mile Island Unit-2 Nuclear Plant site is co-located with the Exelon-owned Three Mile Island Unit-1 Nuclear Plant on the Three Mile Island site, approximately two miles south of Middletown, Pennsylvania. As the result of the sale of TMl-1, the TMl-2 physical plant site was reduced to essentially the footprint of the plant structures with all of the former TMl-2 grounds being transferred along with the sale ofTMl-1. The Nuclear Steam Supply System (NSSS) is a Babcock & Wilcox PWR that had a licensed Rated Thermal Power of 2772 MWt. Appendix A provides a list of the TMl-2 systems and structures included in the material inventory for this study. 4.2 Decommissioning Phases (Periods) Each of the specified scenarios includes three major phases, or periods. Major Phases for Scenario 1 DECON: Phase 1- Source Term Risk Reduction, which includes:

1. Phase 1 Source Term Reduction preparations including: Develop removal methods; Identify specialty equipment; Develop procedures; Provide Training; Conduct mock-ups and/or "dry runs" as appropriate

2. Remove and consolidate remaining residual nuclear fuel (estimated 1% of original fuel inventory) by chemical or mechanical decontamination methods

3. Design and develop residual fuel storage system (wet or dry)

4. Procurement of the residual fuel storage system components (canisters, casks, etc.)

5. Remove high source term non-fuel radioactive materials

6. Design and procure remote and/or robotic equipment for remote operations

7. Design and developed shielded transfer and storage for high source term waste

8. Dispose of high source term waste at authorized Class B/C waste facility Phase 2 - Decommissioning and License Termination, which includes:

1. Remove contaminated components and piping systems from the Reactor, Auxiliary, Fuel Handling, and Control & Service buildings and package/transport for disposal at the Clive facility

2. Remove and segment the reactor vessel head and package for disposal

3. Disassemble I segment the remaining reactor vessel(s) internals

4. Segment I section the reactor vessel and package for disposal

5. Remove the reactor coolant piping and pumps, steam generators, and other large components and package for disposal

6. Remove activated' concrete biological shield and contaminated concrete

7. Remove steel liners from the refueling canal and containment

8. Decommission and dismantle the Spent Fuel Pool for disposal

9. Demolition of the site buildings and structures

10. Complete Final Status Surveys to confirm site meets NRC Unrestricted Release Page 20of 40

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-Ol FirstEnergy Three Mile Island, Unit 2 Rev.a Phase 3 - SNF/GTCC Interim Storage & Disposition, which includes:

1. Security and Operations of SNF/GTCC storage facility

2. Load out, transport and dispose of SNF/GTCC Waste to an authorized waste facility

3. Decommission and demolition of SNF/GTCC Storage Facility Major Phases for Scenarios 2 and 3 SAFSTOR:

Phase 0 - SAFSTOR, which includes:

1. Primarily PDMS services contracted from the TMl-1 owner.

Phase 1- Source Term Risk Reduction, which includes:

1. Phase 1 Source Term Reduction preparations including: Develop removal methods; Identify specialty equipment; Develop procedures; Provide Training; Conduct mock-ups and/or "dry runs" as appropriate

2. Remove and consolidate remaining residual nuclear fuel (estimated 1% of original fuel inventory) by chemical or mechanical decontamination methods

3. Design and develop residual fuel storage system (wet or dry)

4. Procurement of the residual fuel storage system components (canisters, casks, etc.)

5. Remove high source term non-fuel radioactive materials

6. Design and procure remote and/or robotic equipment for remote operations

7. Design and developed shielded transfer and storage for high source term waste

8. Dispose of high source term waste at authorized Class B/C waste facility Phase 2 - Decommissioning and License Termination, which includes:

1. Remove contaminated components and piping systems from the Reactor, Auxiliary, Fuel Handling, and Control & Service buildings and package/transport for disposal at the Clive facility

2. Remove and segment the reactor vessel head and package for disposal

3. Disassemble I segment the remaining reactor vessel(s) internals

4. Segment I section the reactor vessel and package for disposal

5. Remove the reactor coolant piping and pumps, steam generators, and other large components and package for disposal

6. Remove activated concrete biological shield and contaminated concrete

7. Remove steel liners from the refueling canal and containment

8. Decommission and dismantle the Spent Fuel Pool for disposal

9. Demolition of the site buildings and structures

10. Complete Final Status Surveys to confirm site meets NRC Unrestricted Release Sub Periods I Work Scope for Phase 1- Source Term Risk Reduction:

Period la - Planning & Transition Following Dormancy

• Regulatory and Licensing activities
• Develop removal methods and procedures
• Identify specialty equipment
• Develop heavy lift and rigging plans
• Develop waste management plan Page 21 of40

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-Ol FirstEnergy Three Mile Island, Unit 2 Rev.O

• Develop rad protection plan
• Develop emergency management plans
• Develop training programs
• Design and develop residual fuel storage system for spent fuel and GTCC waste
• Design remote and/or robotic equipment for remote operations
• Design and develop shielded transfer and storage for high source term waste
• Develop project execution baseline budgets and schedules Period lb- Site Upgrades & Preparations
• Procure remote and/or robotic equipment
• Conduct mock-ups, dry runs and training as appropriate
• Building preparations, modifications and access
• Crane modifications
• Procure spent fuel & GTCC Casks
• SNF/GTCC Interim Storage Facility Construction
• Rail & Transportation Upgrades
• Installation of Temporary Facilities Period le- Large Component Source Term Reduction
• Mobilize equipment and robotic equipment for Dose Reduction
• Steam Generator Dose Reduction
• Reactor Internals Removal
• Pressurizer Dose Reduction
• Load and transfer spent fuel and GTCC casks to Interim Storage Facility Period ld - Building Source Term Reduction
• Reactor Building Dose Reduction
• Reactor Building Basement Dose Reduction
• Fuel Handling Dose Reduction
• Equipment for Building Dose Reduction
• Auxiliary Building Dose Reduction
• Dispose of Class B/C waste at authorized waste facility Period le - Undistributed Direct ongoing activities
• Class A Waste Packaging, transportation and disposal
• Misc. Rad Waste Processing & Disposal
• Liquid Rad Waste Processing & Disposal Period lf- Undistributed Indirect and Management Costs
• Rad Protection Program
• Project Management & Engineering
• Security Staff & Equipment
• Environmental Program
• Insurance
• Property Taxes & Fees Page 22of40

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev.O

• Safety Program & Training
• PDMS and Plant Security Services
• Corporate Allocations & Financing
• Energy Costs
• NRC Fees & Inspections
• Temporary Facilities Sub Periods I Wok Scope for Phase 2 - Decommissioning & License Termination Period 2a - Planning & Transition following Phase 1
• Site LTP Preparation
• Site Characterization
• Develop Decon and demolition methods and procedures
• Implement Phase 2 waste management plan
• Implement Phase 2 rad protection plan
• Implement Phase 2 emergency management plans
• Implement Phase 2 training programs
• Identify specialty equipment
• Electrical & Mechanical Preparations
• Refine Phase 2 project execution baseline budgets and schedules Period 2b- Complete Large Components Removal
• Mobilize Equipment for Large Component Removal
• Steam Generator Removal
• Reactor Vessel Removal
• Main Condensers Removal Period 2c - Complete Rad Building Systems Removal
• Reactor Building Basement Liner Removal
• Reactor Building Systems Removal
• Fuel Handling I Auxiliary Systems Removal Period 2d - Rad Building Demolition
• Mobilize heavy demolition equipment
• Reactor Building Demolition
• Auxiliary Building Demolition
• Control Building Demolition
• Fuel Handling Building Demolition
• Turbine Building Rad Demo
• Misc. Underground Piping
• Survey & Dispose of Clean Material
• Equipment for Building Demolition Page 23 of 40

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev. O Period 2e - License Termination

• Site Surveys
• Partial site releases
• Final Site Surveys
• Reports and submittals for License Termination Period 2f - Site Restoration
• Air Intake Tunnel
• Turbine Building Clean Demolition
• Control Building Area
• Emergency Diesel Generator
• Processing of clean fill materials
• Building and Site Backfill
• Cooling Tower Demolition
• Final Site Restoration Period 2g - Undistributed Indirect Costs 1* 2
• Rad Protection Program
• Project Management & Engineering
• Environmental Program
• PDMS and Plant Security Services
• AN I/NEIL/Other Insurance
• Property Taxes & Fees
• Energy Costs
• Safety & Training Program
• NRC Fees Note 1, Scenario 1- DECON Undistributed Indirect Costs are assigned to Period 2g.

Note 2, Scenarios 2 and 3 - SAFSTOR Undistributed Indirect Costs are assigned to Period 2h. Sub Periods I Work Scope for SNF/GTCC Storage and Disposition 3* 4 SNF/GTCC Storage and Disposition includes:

• SNF/GTCC Storage Facility Security & Operation
• Load out, transport and dispose of SNF/GTCC Waste to an authorized waste facility
• Decommission and demolition of SNF/GTCC Storage Facility Note 3, Scenario 1- DECON, SNF/GTCC Disposition are assigned to Phase 3, which occurs at the tail end of the SNF/GTCC Storage period.

Note 4, Scenario 2 and 3 - SAFSTOR, SNF/GTCC Disposition are assigned to Period 2g, which occurs at the tail end of Phase 2 - Decommissioning & License Termination. Page 24of40

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev.a 4.3 Decommissioning Staff EnergySolutions developed staffing based on the assumption that the TMl-2 decommissioning project will be performed in an efficiently planned and executed manner using project personnel experienced in decommissioning and large scale project management. This DCE also assumes that the decommissioning work will be performed by a highly experienced and qualified Decommissioning General Contractor (DGC), with oversight and management of the decommissioning operations performed by the Licensee staff. It is also assumed that the Licensee staff will be supplemented by a professional consulting engineering firm, particularly in the planning and preparation phase. Estimated Staff levels by functional group, are provided in Section 6.0. 4.4 Spent Fuel Management Following completion of the defueling program at TMl-2, it is estimated that approximately 1% of spent fuel remains in the plant, predominantly within the reactor vessel. During decommissioning, the recovery and disposition of the residual spent fuel will be accomplished. GPUN is evaluating options for the long-term management of the recovered spent fuel. These options include: (1) Transfer to the DOE under a program similar to that used during the accident recovery spent fuel disposition program (2) Transfer to an as yet to be developed, privately owned Interim Spent Nuclear Fuel Storage Facility (3) Storage of the TMl-2 spent fuel at a TMl-1 ISFSI per a negotiated agreement with owner This Decommissioning Cost estimate is based on Option 3, that there is a negotiated agreement with the owner of TMl-1 for the storage of residual spent fuel and GTCC waste. This includes sharing costs for the design and construction of an ISFSI and/or interim storage facility, security and operations. 4.5 Spent Fuel Shipments Should GPUN be successful in transferal of the residual spent fuel to DOE, as was done during the accident recovery phase, then no further action would be required in as much as the DOE will already have taken possession of the TMl-2 fuel. There is presently no guidance regarding the transfer of spent fuel to DOE from a privately owned Interim Spent Nuclear Fuel Storage Facility. Considering that this DCE is based on Option 3, that there is a negotiated agreement with the owner of TMl-1 for the storage of residual spent fuel and GTCC waste, then it is expected that the TMl-2 SNF/GTCC will be disposed of as GTCC waste. For this DCE, it has been assumed that the owner of TMl-1 will be responsible for 75% of these costs and the owner of TMl-2 will be responsible for 25% of these costs. This DCE assumes that costs for equipment, load out of SNF/GTCC and the decommissioning of the storage facility will be shared with the owner of TMl-1. For this DCE, it has been assumed that the owner of TMl-1 will be responsible for 75% of these costs and the owner of TMl-2 will be responsible for 25% of these costs. EnergySolutions has conservatively estimated the spent fuel and GTCC packaging, transportation and waste disposal cost, assuming that the GTCC waste will be packaged in modified spent fuel canisters, or similar containers, and will be shipped to a storage or disposal facility operated or licensed by DOE. Page 25 of 40

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev. O 5.0 BASES OF ESTIMATE AND KEY ASSUMPTIONS The bases of, and key assumptions for, this site-specific decommissioning estimate are presented below:

1. Scenario 1 -DECON schedule is based upon the TMl-2 decommissioning effort commencing in 2019 and coordinated with the TMl-1 decommissioning effort.

2. Scenario 2 - SAFSTORl schedule is based on TMl-1 placed into long-term SAFSTOR upon completion of commercial operations at some point between 2019 and 2034.

3. Scenario 3 - SAFSTOR2 schedule is based on TMl-1 shutting down between 2019 and 2034 and utilizing a 60-year SAFSTOR period. TMl-2 would seek an extension of the TMl-2 SAFSTOR period beyond its current license termination date of 2053 in order to coordinate de.commissioning with the TMl-1 SAFSTOR decommissioning effort.

4. A license amendment will be required to transition the license from the PDMS mode into the DECON mode. This is a complex amendment that has not been fully developed at this time, but it will require numerous revisions to the existing license and technical specifications, including license Amendment Request to enter DECON, PSDAR Update and DSAR Update.

5. Revisions will be required for other licensing Basis Documents (e.g., Security, Emergency Planning, Fire Protection, Nuclear Safety, Quality Assurance Program, Fuel Debris issues, Spent Fuel Storage options).

6. Residual spent fuel in forms that prevent recovery in distinct concentrations suitable for packaging for ISFSI storage, are assumed to be collected for disposition as GTCC waste. For purposes of the cost analysis, it is assumed that GTCC waste will be packaged and disposed of as high-level waste.

Since it is uncertain that the DOE will accept the GTCC material in a timely manner, additional costs are included for the temporary storage of GTCC material.

7. The TMl-2 DCE Spent Fuel Management Plan is based on a negotiated agreement with the owner of TMl-1 for the storage of residual TMl-2 spent fuel and GTCC waste. This includes sharing costs for the design and construction of an ISFSI and/or interim storage facility, security and operations.

For this DCE, it has been assu~ed that the owner of TMl-1 will be responsible for 75% of these costs and the owner of TMl-2 will be responsible for 25% of these costs.

8. This DCE assumes that costs for equipment, load out of SNF/GTCC and the decommissioning of the storage facility will be shared with the owner of TMl-1. For this DCE, it has been assumed that the owner of TMl-1 will be responsible for 75% of these costs and the owner of TMl-2 will be responsible for 25% of these costs.

9. The DCE includes estimated costs for the SNF/GTCC waste disposal as GTCC waste, including that the GTCC waste will be packaged in modified spent fuel canisters, or similar containers, and will be shipped to a storage or disposal facility operated or licensed by DOE.

10. The decommissioning will be performed using currently available technologies.

Page 26 of 40

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev.O

11. This estimate is based on site-specific building inventories and plant systems, as provided and determined by EnergySolutions, and includes items that may not appear on any published inventory. An example being lead shielding over the refueling canal and lead bricks covering the RB-305 seismic gap.

12. Systems and equipment formerly located within the Turbine Building comprise the majority of SSCs that have been removed. The condensate storage tanks, aqueous ammonia tank and demineralized water tank have been removed. These commodities were not included in the estimate.

13. All transformers on site following shutdown are assumed to be PCB-free; therefore, this study does not include costs for disposition of PCB contaminated transformers.

14. Cost for transportation of clean scrap metal to a recycler is included in the estimate.

15. Concrete debris and all other demolition debris is assumed to be removed from the site and disposed of at a local landfill.

16. Foundations and building exterior walls are removed to a nominal depth of three feet below grade, surveyed and backfilled with appropriate fill material.

17. Due to its location, it is assumed that the cork seam will be addressed just prior to building demolition when all other systems and components have been removed. Based upon past studies, it appears unlikely that radioactivity from the cork seam contamination has or will enter the ground water beneath the power block structures. It is very likely that the MARSSIM process will require examination of the soil and groundwater that underlie the structures.

18. The estimate is based on final site restoration, in which all existing and proposed structures, with the exception of the switchyard, will be removed. Clean demolition costs are based on the assumption that all site improvements will be removed in their entirety.

19. Clean backfill will be imported and placed to re-establish grade. The entire disturbed area of the site is to be graded, to restore the natural grade to the extent possible, and seeded.

20. We do not anticipate that a significant quantity of 'clean lead' exists at the site. Uncontaminated lead shielding remaining after shut down is assumed to be removed from its installed locations and shipped offsite by entities having a need for the material. The entities receive the lead at no charge in return for providing the removal and shipping services.

21. Costs for hazardous waste disposal, as well as asbestos and lead abatement, are included in this study. It should be noted that although the plant was free of asbestos-containing thermal insulation, TMl-2 does contain asbestos. Much of the electrical cable has asbestos in it. Explosion proof lighting fixtures have asbestos lens gaskets and there are thousands of asbestos-containing pipe and equipment gaskets. Some window grout and floor tile grout may also contain asbestos.

22. All Class A waste is assumed to be primarily disposed of at EnergySolutions' facility in Clive, Utah, in accordance with 2018 disposal rates.

23. Class A waste includes Dry Active Waste (DAW) arising from the disposal of contaminated protective clothing and health physics supplies.

Page 27 of 40

2018 Decommissioning Cost Estimate for Document No. 1640S9-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev.O

24. Class B and C waste disposal costs are based on current quoted rates for disposal of activated hardware and resins at the Waste Control Specialists, Texas facility. All resins and filter waste is assumed to be Class B.

2S. Shipping costs for the Class Band C waste are based on a distance of 1,73S miles one way from TMl-2 to the WCS facility.

26. GTCC waste disposal costs are estimated based on recent quoted rates for disposal at WCS or other disposal facility licensed by DOE.

27. GTCC is not subject to the same storage and security requirements as spent fuel and therefore is not required to be stored on the ISFSI pad. But for purposes of this estimate and to facilitate decommissioning, GTCC waste generated from the segmentation of the reactor internals and other abnormal waste streams is assumed to be packaged in appropriate canisters and stored in an ISFSI facility built and shared with the owner ofTMl-1, pending ultimate transfer to DOE.

28. It is assumed that approximately (10) canisters will be required for GTCC waste, and (2) canisters will be required for residual spent fuel.

29. Reactor vessel and internals curie estimates were derived from pertinent TMl-2 Defueling and Spent Fuel Evaluation documents. This information will have to be confirmed and further evaluated when decommissioning operations are resumed following the Post-Defueling Monitored Storage phase.

30. The EnergySolutions site-specific classification of radioactive wastes for the TMl-2 plant determined that most of the Reactor Vessel Internals will exceed Class-C disposal criteria in their present configuration and condition.

31. EnergySolutions has assumed that the 10 CFR Part SO license will be maintained until DOE has taken possession of the SNF/GTCC.

32. The DCE has included the annual NRC 10 CFR 171.1S(c)(2) fees, for reactors in decommissioning until decommissioning is completed as a license termination expense. Following completion of decommissioning, this expense is continued as a SNF/GTCC management cost for maintenance of the 10 CFR Part SO license.

33. EnergySolutions has included NRC inspection fees during each decommissioning period based on the type and level of activities being performed.

34. Site operating expenses expected to be incurred during decommissioning and SNF/GTCC management are included in the estimate. These costs include materials and services, utilities, telecommunications equipment, non-process computers, and tools and equipment.

35. Craft labor rates and fringe costs are based on 2018 Harrisburg area union locals.

36. This study follows the occupational exposure principles of As Low As Reasonably Achievable (ALARA) through the use of productivity loss factors that incorporate such items as the use of respiratory protection and personnel protective clothing. These factors increase the work duration and cost.

Page 28of40

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev.O

37. The water processing operat ions are estimated based upon an experienced decommissioning operations contractor performing the decommissioning and understanding the projected water requirements. We anticipate reuse of several in-plant tanks and flow pathways for water processing. A portable liquid waste processing system is expected to be utilized to process water.

It is intended that processed water will be reused to the extent practical. This is expected to be a zero discharge operation. A large quantity of water actually leaves the site as the result of dust suppression water misting during demolition of contaminated concrete. Any residual processed water will be dispositioned off site.

38. The costs of all required safety analyses and safety measures for the protection of the general public, the environment, and decommissioning workers are included in the cost estimates. This reflects the requirements of:

10CFR 20 Standards for Protection Against Radiation 10 CFR 50 Domestic Licensing of Production and Utilization i;acilities 10 CFR 61 Licensing Requirements for Land Disposal of Radioactive Waste 10 CFR 71 Packaging and Transportation of Radioactive Material 10 CFR 72 Licensing Requirements for the Independent Storage of Spent Nuclear Fuel and High-Level Radioactive Waste 29CFR1910 Occupational Safety and Health Standards 49 CFR 170-189 Department of Transportation Regulations Governing the Transport of Hazardous Materials Reg. Guide 1.159 Assuring the Availability of Funds for Decommissioning Nuclear Reactors Page 29 of 40

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-Ol FirstEnergy Three Mile Island, Unit 2 Rev. 0 6.0 STUDY RESULTS Cost Summary by License Termination. Spent Fuel and Site Restoration The cost estimate results for all scenarios are provided in Table 6-1 below. This table provides License Termination cost (corresponding to 10 CFR 50.75(c) requirements); Spent Fuel Management costs (corresponding to 10 CFR S0.54(bb) requirements) and Site Restoration costs (corresponding to activities such as clean building demolition and site grading etc.). TABLE 6-1 Cost Summary by Phase Decommissioning Cost Summary (thousands of 2018 dollars) License Termination Spent Fuel Site Restoration Total Scenario 1 - DECON 1,152,465 92,815 54,088 1,299,368 Scenario 2 - SAFSTORl 1,183,939 82,662 53,905 1,320,506 Scenario 3 - SAFSTOR2 1,325,700 82,662 53,831 1,462,193 GTCC operations, storage and disposition are included in the license Termination Costs. Detailed cost tables are provided in Appendix D. Summary Schedules The costs and schedule for the DECON scenario is divided into major project phases (periods) and presented by "Source Term Risk Reduction," "Decommissioning and License Termination" or "SNF/GTCC Storage and Disposition." Figure 6-1 below shows a summary-level DECON schedule. The costs and schedule for the SAFSTOR scenarios are divided into major project phases (periods) and presented by cost account "SAFSTOR," "Source Term Risk Reduction" or "Decommissioning and license Termination." Figures 6-2 and 6-3 below show summary-level SAFSTOR schedules. Detailed schedules are provided in Appendix C. Page 30 of 40

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev.a FIGURE 6-1 Summary Schedule - DECON NRCApprove UceMeAmendments NRCApprove Phaise 3 Complete J1n202S Ucense TermlMtlon I Phi.. 2 Complete SNF/ GTCC to DOE Oec20SS Oec20SS Phase 1- Site Upgrades & Preparations I Phase 1- Source Term Reduction I Phase 2 - PJannlna & Transition Phase 2 - Decontamination & Decommission SNF/GTCC Transfer to DOE Decommission Storage Faclllty Page 31of40

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-Ol FirstEnergy Three Mile Island, Unit 2 Rev.O FIGURE 6-2 Summary Schedule - SAFSTORl Phase I Complete Phase 2 Complete Jan 2047 t4 SNF/GTCC DOE NRCApprove NRCApprove Unit 1 Shutdown Ucense Amendments Ucense Termination Dec2019 Jan2041 Oec205~ I I I 2019 . 2022  ; 2025 . 2028 ' 2031 2034 2037 2040 204 3  ! 204(, 2049 205 2 ' Phase 1

• Planning & Licensing Phase 1- Site Upgrades & Preparations Phase 1- Source Term Reduction Phase 2 - Decontamination & Decommtsslo Phase 2 - Site Restora Decommlssto Storage Faclllty Page 32 of40

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev.O FIGURE 6-3 Summary Schedule - SAFSTOR2 PhaH I Complet1 PhaH 2 Compl1t1 J.n2088 SNF/GTCCtopoE NRCApprove Unit 1 Shutdown Ue1n11 T*nnlnltlon 01c2019 Phase 1 ~ Planning & licensing Phase 1-Site Upgrades & Preparations Phase 1- Source Term Reduction Phase2 Cost Summarv by Phase and Cost Type The following Tables 6-2 through 6-7 provide cost summaries for each Scenario by Phase and by Cost Type. For Tables 6-3, 6-5 and 6-7 "Other Direct Costs" generally include subcontracted services such as PDMS costs; engineering; Design and Construction of SNF/GTCC Storage Facility; miscellaneous subcontracts; temporary facilities; Licensing costs; NRC Fees, Insurances, Taxes; Permits, etc. Detailed Decommissioning Cost Estimates for each Scenario are provided in Appendix D. Annual Spending Tables for each Scenario are provided in Appendix E. Page 33 of 40

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev.O TABLE 6-2 DECON Cost Summary by Phase Scenario 1 - DECON ESTIMATE (thousands of 2018 dollars) Period I L ~J Item Desalptlon I L.* J Total Cost L* la Total  : Planning & Transition Following Dormancy 10,203 lb Total ;site Upgrades & Preparations 51,517 lcTotal iLarge Component Source Term Reduction 65,152 ldTotal Building Source Term Reduction 217,338 le Total .Undistributed Direct Costs 74,071 lfTotal  : Undistributed Indirect Costs 409,134 Phase 1 Total - Source Term Risk Reduction 827,415 i i 2aTotal *Planning & Transition following Phase 1 7,369 2bTotal Large Components Removal 26,665 2cTotal Rad Building Systems Removal 27,184 2dTotal Rad Building Demolition 102,032 2eTotal License Termination 15,290 2fTotal Site Restoration 30,92<l 2gTotal Undistributed Indirect Costs 151,38E Phase 2 Total - Decommissioning & License Termination 360,846

                                 )

3a Total :SNF/GTCC Interim Storage & Disposition 111,108 Phase 3 Total - SNF/GTCC Interim Storage & Disposition 111,108 I Grand Total 1,299,368 TABLE 6-3 DECON Cost Summary by Cost Type Scenario 1 - DECON ESTIMATE (thousands of 2018 dollars) Labor Cost $ 337,321 Materials & Equipment Cost $ 119,812 Waste Packaging $ 12,016 WasteTransportation $ 35,980 Waste Disposal $ 279,705 Energy Costs $ 17,004 Other Direct Cost (ODC) $ 243,109 Contingency $ 254,422 Total Cost $ 1,299,368 Page 34of40

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev.O TABLE 6-4 SAFSTORl Cost Summary by Phase Scenario 2 - SAFSTORl ESTIMATE (thousands of 2018 dollars) Period I Item DescriDtion I Total Cost I I QaTotal ; PDMS Monitoring  ! 62,663 Phase 0 Total - SAFSTOR 62,663 I I la Total i Planning & Transition Following Dormancy 10,203 lb Total ;site UD2rades & Preparations 51,517 le Total Large Component Source Term Reduction 65,152 ldTotal Building Source Term Reduction 217,3311 le Total Undistributed Direct Costs 74,071 I lfTotal Undistributed Indirect Costs 409,134 Phase 1 Total - Source Term Risk Reduction 827,415 I I i 2aTotal Planning & Transition following Phase 1 I 7,36S 2bTotal large Components Removal 26,665 I 2cTotal Rad Building Systems Removal 27,184 2dTotal Rad Building Demolition 102,032 2eTotal License Termination 15,29(] 2fTotal Site Restoration 30,92(] 22Total SNF/GTCC Interim Storage & Disposition 70,493 I 2hTotal Undistributed Indirect Costs 150,475 Phase 2 Total - Decommissioning & License Termination 430,428 I Grand Total *~ 1,320,506 TABLE 6-5 SAFSTORl Cost Summary by Cost Type Scenario 2- SAFSTORl ESTIMATE (thousands of 2018 dollars) Labor Cost $ 314,857 Materials & Equipment Cost $ 119,812 Waste Packaging $ 12,016 WasteTransportation $ 35,980 Waste Disposal $ 279,705 Energy Costs $ 17,004 Other Direct Cost (ODC) $ 286,273 Contingency $ 254,859 Total Cost $ 1,320,506 Page 35 of 40

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev.O TABLE 6-6 SAFSTOR2 Cost Summary by Phase Scenario 3 - SAFSTOR2 DETAILED ESTIMATE (thousands of 2018 dollars) Period I Item Desalptlon I Total Cost oaTotal :PDMS Monitoring ' 205,397 Phase 0 Total - SAFSTOR 205,397 I '  ! la Total :Planning & Transition Following Dormancy 10,203 lb Total *Site Upgrades & Preparations 51,517 le Total i Large Component Source Term Reduction 65,152 ldTotal ; Building Source Term Reduction 217,338 le Total Undistributed Direct Costs 73,317 lfTotal :Undistributed Indirect Costs 409,134 Phase 1 Total - Source Term Risk Reduction 826,661 2aTotal 'Planning & Transition following Phase 1 ' 7,369 2bTotal *Large Components Removal 26,665 2cTotal *Rad Building Systems Removal 27,153 2dTotal Rad Building Demolition 101,845 2eTotal License Termination 15,290 2fTotal 1Site Restoration 30,845 2gTotal .SNF/GTCC Storage & Transfer to DOE 70,494 2hTotal :Undistributed Indirect Costs 150,475 Phase 2 Total - Decommissioning & License Termination 430,135 Grand Total 1,462,193 TABLE 6-7 SAFSTOR2 Cost Summary by Cost Type Scenario 3 - SAFSTOR2 ESTIMATE (thousands of 2018 dollars) Labor Cost $ 314,857 Materials & Equipment Cost $ 119,812 Waste Packaging $ 12,016 WasteTransportation $ 35,980 Waste Disposal $ 279,705 Energy Costs $ 17,004 Other Direct Cost (ODC) $ 413,373 Contingency $ 269,446 Total Cost $ 1,462,193 Page 36of 40

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev.O Project Staffing The following Tables 6-8 and 6-9 are applicable to all scenarios for Phase 1 and Phase 2 work. The tables are organized by Staff Group for each Phase. TABLE 6-8 Staffing for Phase 1- Source Term Reduction PHASE 1- SOURCE TERM REDUCTION ProJect Year STAFF GROUP 1 2 3 4 5 6 7 8 9 10 11 Management & Administratiw 2 2 3 15 22 28 28 28 28 18 9 Engineering 1 1 3 8 8 8 8 8 8 4 3 Plant Operations & Maintenance - - - 6 16 19 19 16 15 10 8 Radiation Protection and Chemistry 1 1 2 15 35 42 42 42 42 28 21 Health Physics - - - 3 3 3 3 3 3 2 2 Regulatory Affairs 2 3 4 4 3 3 3 3 3 2 2 Quality - - 0 1 1 2 2 2 2 1 1 Waste Operations - - 0 3 4 4 5 5 5 3 2 Security* Decommissioning Contractor 4 10 10 12 12 12 10 6 4 TOTAL 5 6 16 : 64 ' 102 121 : 122 119 116 1 75 . 53

• Security Staff shared with TM-1 owner TABLE 6-9 Staffing for Phase 2 - D&D and License Termination PHASE 2- D&D and LICENSE TERMINATION ProJect Year STAFF GROUP 10 11 12 13 14 15 16 17 Management &Administratiw 9 9 20 26 24 24 15 6 Engineering 2 2 6 6 6 6 0 -

Plant Operations & Maintenance 5 4 10 10 10 10 5 2 Radiation Protection and Chemistry 14 21 34 34 45 45 28 5 Health Physics 1 1 2 3 3 3 2 - Regulatory Affairs 1 1 4 4 4 4 4 - Quality 1 1 2 3 3 3 1 - Waste Operations 2 3 5 6 6 6 3 2 Security* Decommissioning Contractor 6 8 14 15 15 14 10 2 TOTAL 35  ! 42 83 i 93 101 101 58 15

              *Security Staff shared with lMl-1 owner Page 37of40

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev.O Figure 6-4 below shows the combined staff levels for Phase 1 and Phase 2. FIGURE 6-4 Combined Staffing for Phase 1 and Phase 2 TMl-2 Combined Phase 1 and Phase 2 Staffing 160 140 PHASE 1- SOURCE TERM REDUCTION I I PHASE 2 - D&D & LICENSE TERMINATION 120

  ...c   100

J 0

u 80

s::t'O Ill 60 40 20 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Project Years Waste Disposal Volumes Table 6-10 below provides a summary of Waste Disposal Volumes by Waste Class.

TABLE 6-10 Waste Disposal Volumes Waste Class Volume(d) Class A 1,704,247 Class B & C 12,558 SNF / GTCC 2,530 Appendix B provides a Waste Disposal Summary itemized by volumes, waste form, waste class, weight, volume and costs for packaging, transportation and disposal. Page 38of40

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev.a Comparison of Current Cost Study and Previous Cost Study EnergySolutions has performed several comparison analyses to previous Decommissioning Cost Estimates and reports. These comparisons are complex in that none of the current DCE Scenarios is the same as previous scenarios. The closest comparison is the current Scenario 2 - SAFSTORl compared to the PSDAR estimate dated December 4, 2015. Table 6-11 below shows this comparison. TABLE 6-11 Current DCE Comparison to PSDAR Estimate TABLE 1

• 12/4/15 PSDAR TMl-2 DECOMMISSIONING COST

SUMMARY

Escalated ** EnergySolutions (Thousands of 2014 dollars) to 2018 dollars 2018DCE (2014- 2059) (2019- 2053)*** (2019- 2053) Decontamination 36,384 40,592 31,800 Removal 194,301 216,774 212,643 Packaging 28,794 32,124 34,116 Transportation, Off-site Waste Processing, and Disposal 322,278 359,554 332,948 Program Management 497,930 555,522 509,325 Miscellaneous Equipment 24,512 27,347 46,060 Insurance and Regulatory Fees 16,203 18,077 61,534 Other Decommissioning Costs 101,096 95,844 92,081 Total Decommissioning Costs 1,221,498 1,345,835 1,320,506

  *TABLE 1 from Revision to Post-Shutdown Decommissioning Activities Report, December 4, 2015.
  **Escalation Table based on TLG ESCALATION ANALYSIS, February 2015
  ***Reduced ODC by 30,376 due to reduced SAFSTOR period (2019 - 2053) in lieu of (2014 - 2053)

Additional comparisons were done based on current annual spending compared to the Annual Spending Tables included with the 2013 Decommissioning Cost Study. These comparisons are provided in Appendix F. Page 39 of40

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev. 0

7.0 REFERENCES

1. U.S. Nuclear Regulatory Commission, "Domestic Licensing of Production and Utilization Facilities," 10 CFR Part 50, 2008.

2. Atomic Industrial Forum, Inc., "Guidelines for Producing Commercial Nuclear Power Plant Decommissioning Cost Estimates," AIF/NESP-036, May 1986.

3. U.S. Nuclear Regulatory Commission, "Standard Format and Content of Decommissioning Cost Estimates for Nuclear Power Reactors," Regulatory Guide 1.202, February 2005.

4. U.S. Nuclear Regulatory Commission, "Technology, Safety and Costs of Decommissioning a Reference Pressurized Water Reactor Power Station," NUREG/CR- 0130, June 1978.

5. U.S. Nuclear Regulatory Commission, "Multi-Agency Radiation Survey and Site Investigation Manual (MARSSIM)," NUREG-1575, Rev. 1, August 2000.

6. U.S. Department of Energy, "Cost Estimating Guide," DOE G 430.1-1, March 1997.

7. TMl-2 Defueling Completion Report (Final)

Page 40of40

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev.0 APPENDIX A List of Systems and Structures

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev.O TMl-2 Plant Systems and Structure List Structure Reactor Building Structure Turbine Building Structure Auxiliary Building Structure Fuel Handling Building Structure Natural Draft Cooling Towers (2) Structure Mechanical Draft Cooling Tower Structure Circulating Water Pump House Structure Circulating Water Chlorinator House Structure Control Building Structure Service Building Structure Emergency Diesel Generator Building Structure River Water Pump House System Main and Reheat Steam System Bleed Steam System Auxiliary Steam System Feedwater & Condensate System Makeup Water Polishing Treatment & Condensate System Demineralized Water - Turbine Building System Demineralized Water -Auxiliary, Control, Service and Reactor Buildings System Feedwater Heater Vents, Relief and Miscellaneous Drains System Feedwater Heater Drains System Condenser Air Extraction System Lube Oil Purification & Transfer System Instrument Air System Domestic Water System Service Air System Secondary Plant Sampling System Secondary Services Closed Cooling Water System Circulating Water & River Water Chemical Treatment System Circulating & and Secondary Services Water System Reactor Coolant Makeup & Purification System Chemical Addition System Spent Fuel Cooling & Decay Heat Removal System Radwaste Disposal - Reactor Coolant Liquid System Radwaste Disposal - Gas System Intermediate Closed Cooling Water System Nuclear Services Closed Cooling Water System Sampling Nuclear System System Nuclear Services River Water System Reactor Building Emergency Spray & Core Flooding System Decay Heat Closed Cooling Water System Nitrogen for Nuclear & Radwaste Systems System Fire Protection System Diesel Fuel - Emergency Diesel Generator

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev.O System Radwaste Disposal - Solid System Heating & Ventilation - Turbine Building & Control Building Area System Reactor Building - Ventilation & Purge System Heating & Ventilation -Auxiliary Building System Heating, Ventilation & Air Conditioning - Control Building System Radwaste Disposal - Miscellaneous Liquids System Reactor Building Normal Cooling System Heating & Ventilation - Circulating and River Water Pump Houses System Fire Pump House & Fire Deluge House System Heating & Ventilation - Emergency Diesel Generator System Heating & Ventilation - Air Intake and Exhaust System Heating & Ventilation - Fuel Handling Building System Heating, Ventilation & Air Conditioning - Service Building System Service & Control Bldg - Domestic Water, Sanitary Waste & Contam Drains System Steam Generator Secondary Side Vents and Drains System Condensate Return - Main, Bleed, Gland & Auxiliary Traps System HVAC- Circ Water, Chlorinator & Mech Draft Cooling Tower Pump Houses System Radwaste Pumps Seal Water System Building Sump Pump Discharge System System Reactor Building Penetrations Forced Air Cooling System Reactor Building Leakrate Test System Feedwater Heating Nitrogen Blanketing System Hydrogen & Carbon Dioxide for Air Conditioning - Turbine Building System Jacket Coolant System - Erner Diesel Generator System Lube Oil System - Emergency Diesel Generator System Starting Air System - Emergency Diesel Generator System Hydraulic & Pneumatic Fuel Transfer System System Reactor Coolant Pump Seal Recirculating & Cooling Water System OTSG Chemical Cleaning System System Lab & Penetration Pressurization Gas System & Hydrogen for Makeup Tank System Radwaste Disposal - Reactor Leakage Recovery System Oil Splash Shield Drain Piping for Reactor Coolant Pump Motors System Gland Steam Seal System Turbine Building System Environmental Barrier System System Secondary Plant Sampling Recovery System Auxiliary Building Emergency Liquid Cleanup System Recovery System Condenser Air Extraction Filtration System Recovery System Long-term B Steam Generator Cooldown Recovery System Fuel Pool Waste Storage System Recovery System Auxiliary Building Emergency Liquid Cleanup System Sampling Recovery System Temporary Auxiliary & Fuel Handling Building HVAC Recovery System Standby Reactor Coolant Pressure Control System Recovery System Mini-Decay Heat Removal System Recovery System Temporary Nuclear Sampling Recovery System Nuclear Sampling System Recovery System Submerged Demineralizer System (SOS) Recovery System Makeup & Purification Cesium Elution System

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev. a Recovery System RCS Processing System Recovery System Defueling Water Cleanup System Recovery System Internals Indexing Fixture Waster Processing System Recovery Structure Interim Solid Waste Staging Facility Recovery Structure Containment Air-Control Envelope (CACE)

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev.O APPENDIX B Waste Disposal Summary

AppendixB Three Mile Island - Unit 2 Waste Disposal Summary - by Facility and Waste Class (Thousands of 2018 dollars) Waste Waste Weight Waste Volume Burial Packaging Transportation Total Facility Waste Form Class (Les) (CF) Volume (CF) Cost Cost Burial Cost Waste Cost Bear Creek CWF A 3, 125,386 148,068 149, 125 $ - $ 2, 108 $ 10,666 $ 12,774 3,125,386 148,068 149,125 $ - $ 2,108 $ 10,666 $ 12,774 wcs Cask B/C 1,380,988 12,541 12,558 $ 3,607 $ 7,586 $ 125,994 $ 137,188 Clive Cask A 172,272 3,573 3,850 $ 907 $ 1,045 $ 1,455 $ 3,407 Clive Debris A 80,603,416 1,349,842 1,358,759 $ 412 $ 10,462 $ 81,845 $ 92,719 Clive Large Component A 5,767, 161 39,902 45,303 $ 5,256 $ 3,416 $ 13,500 $ 22,172 Clive Mixed Waste A 2,049,300 8,197 8,280 $ 304 $ 393 $ 2,790 $ 3,487 Clive Contaminated Soil A 8,000,000 135,000 138,930 $ 408 $ 6,947 $ 7,354 Not Determined Dry Fuel I GTCC GTCC* 226,387 1,502 2,530 $ 1,530 $ 1,584 $ 36,680 $ 39,794 98,199,524 1,550,558 1,570,210 $ 12,016 $ 24,894 $ 269,212 $ 306,122 Other Local Landfill Clean/Exempt F 165,460,295 2,927,374 2,927,935 $ - $ 7,930 $ 3,901 $ 11,831 Local Recycler Recycled Metals F 40,674,691 2,038,297 2,039,256 $ - $ 1,049 $ (4,079) $ (3,030) On Site Clean/Exemot F 248,449,769 2,939,469 2,923,200 $ - $ - $ - $ - 454,584, 755 7,905,140 7,890,391 $ . $ 8,979 $ (177) $ 8,802 Grand Total 555,909,666 9,603,766 9,609,726 $ 12,016 $ 35,980 $ 279,701 $ 327,698 Note: GTCC costs do not include procurement of casks estimated at $17,680,000.

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev.O APPENDIXC C Detailed Project Schedule - DECON C Detailed Project Schedule - SAFSTORl C Detailed Project Schedule - SAFSTOR2

Start 2022 2023 2024 2025 2026 2027 07.Jln.11

                                                                                                     ' 07-Jan-19'
                                                                                                        ------ -. 30-Jan.23 L 2~29 *-I
                                                                                                          * *- * * ~* 11:oeo::ls*- 1

• 1 **' ., ..,.. ,..

                                                                                                                                                                                                               ~:
                                                                                                                                                                                                                                                                                                                            .,   ;--:-;-                                                      i--*         .......... ..........,.,        ....

11~Deo-35

                                                                                                                                                                                                                                                                                                                                                                                                                                                  ~

30.oeo - .;. . ~ . ~ -.,.. ; -.... '. - .'. ... - , ... -..........., ... ~-  :.. ; . -~ . ~ ....:. -: .. ;. - ~ .. ' -

                                                                                                                       ' 04-Jan.22
                                                                                               . - - '02:.iif,:20 . ' 04-Jan-22 --
                                                                                                                                                                '*-'-'**'*'*****'- t:::::::                                                                                   ; . -.- . -:- -.- .    -~ --;. -*'       '.'.
                                                                                                                                                                                                                                                                                                                      ** ** J **
                                                                                                                                                                                                                                                                                                                                 ~ ** ** - , .... - ,

_ -----*- ___ !_De,;9~& Pr".":'~!.~TCC & Ory Fuel Ca~----* . _ -*-- . ------ _ *-- _ ~~~!:2 - .~~~

                    * ~~~.!r~'!.'°'1_".~UJ>U~~~ --------- ---- *---*---**
                                                                                                      ' 05-Jan*22        3o-Deo-22

llJlding Modlflca1lons & Preparallons ' 31-Jan-23 08-Apr-24  :~

*-** --- --SNF/GTcci;;te.imslofageFidiiY- ... *****--*--                     - **-* -*-            - i 3i:::ia;;=2a-   i 04-Mer                                                                             :~ :
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- -:- -~ .. :- . -:- . ~ . *:- . -: . ~ . *:- . ~ .. :- . *:* . '. .

                                                                                                                                                             ~.                                                                    -~                       -~         ~.     ~.

1c.04~E~ntror ~09Co~n&nt *oose R0duction ...,. -~-. 31:.,i;i-:'23-...'1~25

=-:~@:~2?.0-=-~~~~J:nt~~~~~~=--~~=-=~~~~~-=-- ---~-~                                  --~ ~~.::~~ ~~~':1-:*.2~--- *~-~.!!"~--

1C.0100 , Steam Generator Dose R.-n 14-May-24 : 07-May-26

---1c-:OaoO*:*p;;Wize, DoseRectudiOn- -- -                         *-**----*- - - - - --*-*: 23=ill5 , 07*M.i1-is
                                                                                                                                                                                        -~-

10.0100 Reador 9Jlking Dose Reduction 10.o:z00* * -R.ac:iorButinilB:asemenl o;;-..;"R.dU~ S-**w.osoo- Auxlary 10:0300 -* i'ueiH~.eii~-- eutiil9-oase iiedudki.i- - * ---

                                                                                                   'l!!Jf!Je29~ .. ----*--* .......

k urid1911jiijfi§!IC:__ 1E.0500 * "'5c Heavy E<JJJpment

                                                                 -=:               :                                                                                                     ~ - --                                                                                                                                                                                                ; .. ;. . ~- -~
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                                                                                                                                                                                                                                                                                                                                                                                                                                                    ~-.
* *1E:04oo-*-* ~ ilaCi w35teP<OO.SSing & Disposal                                                        14-Feb-23 ' 26-Jan-29 ie.oaoo. -. Mi5c-Riidw3Stiif>Yoai~g& otsp0~ - -- .                                      ---         ----------------*'

• 07-Feb-25 : 26-Jan-29 1E.o31o ***** ci.SSeTCwasie"T;;;nSi;;; --- --- -- * - --

                                                                                                                                                                                              ~---

j *t * '""  ! ""' * ! "" ' ""' -- ! -- ' " j * * ..'-- I --' ""

                                                                                                                                                                                                                                                                       . .,;i;. ._'._ (* -- '-- '* ..
                                                                                                                                                                                                                                                                       ~ u' *  ! *                         ~          *'_. *j 1F.0100

• Rad Protection Program ' 05-Jan-22 : 26-Jan-29

                                                                                      - - - *-.-0-s-.:;.;;;::22*-:2&-Jan.29
- *iF.020~-::- -~§~-~~-~~~I~~~g- ~=:~==~-:~                                                                                                                                                                                                                                                                           

1F.0800

• PDMS and Plant Sealrity Services
• os-Jan-22°-  ; 2&:°.Jii,,:29 . ' . ' µ .??

- -11'.o:iiiO - - i8Fsi&.W.ltyatj,Ofaiions:_-:-.:=.___ _ ___                                -*-       : 05.Ma;:24--::;:_2~29 -

1

• PtiliM f 29 . *. _. ... ._ ... ., .., .............. _..*. _.  :-*: ..:-:**:*'."' *:*-:**'*'*:**'*'**'-*'*'**'

Site Charaderlzallon  ; 25-Aug-28

• 29-Aug-29

    - - - -

• LTP i'repai-7.tien- * - - -- * * - * - - - -- - *- - * -** - *--

                                                                                                        *25:A.Jg:ia-~29-Alig.29
                 -:-~~Ov!_~/~~~~~ia~~ ~~--~*=~ -=---=~=~~~-_:_:--==-=~~=~~~~=~29                                                                                                                                                                                                                                    :o :

E:::::I Remaining Level ol Effort Remaiiing Work Appendix C-1 iProject 1M12-FF-Ol

                                                                                                                                                                                                                                                                                          *c:tlcd by; mlrademacbcr Os.Dec;.18 19;40
-           Ac:l:ualWork                  *        *Milestone                                                                                Project Name:TMl2 Scenario 1 - DECON e*      I  Rem~           Work            ,......... Summary

AdlvilylD AdiYily Name 2022 2023 2024 2l>25 2034 200$12036 Q

• Ele<ITlcal & Mechanical PreparallonS

   -* ----- -*-;*p,.0J9d- ,;..,,.g.n,e;;i &e.;gi;;e;t;g ----- -
                  ! Equipment for Large Component Removal
      -- -*- -- 'Fie;;dor V.SS81 RemoVai- -- - --*
                                                                                                                                                                                                                                                                                                                                                                                           -~-  -- -.- ' -... -..'
                                                                                                                                                                                                                                                                                                                                                                                                       ~-     --~

2C.0200  : Reactor Bulding Systems Removal

- 2C:081o-* -- ci8sSAWaSiO"rranSiiQii8Jlon & oisiiQS,il*-- -- - -- *- --- *
   --2C.Oi0ii*--*'RO'Bi:tor ~easement u;;,;-iiemovai - --
- --2<::0300*---: Fiiei !T~i ~-..,YSy.rems R.;n.;;,;j                                                                                                .    '                .     . .
                                                                                                                                                  . -~ - .:. -; --~ . ~- -~ -.;. - - -..,. - - .;. . ~. -~ ..;. -; .. ;. . ~ -. ~ .
                                                                                                                                                                                                                                                                                        .. ~ ..;.. ; ..;.. ~-. ~ -.;.. ; .. ;. . ~- -~ -

20.osoo TUfblneBuldingRadDemo *-- : 11-Mar:~.iJ~-

   - 20.0200 -*- Au~ Bulding DernolliOn______ - - - - - - - - - - - - -- ----; 'iia-Sep-32 . ao:NO'V:-32
*-=~~=--=.t7:"'.-:::~=-~.:.-=--=-=--=~~-=~:=~==~~~:f~~ =}\ -:                                                                        .,..,   -<<+-:--:*-<+*:- :--H--:--H--H--: -,--, --.--.--                                                    --,--                         '         '
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*---1~:~=~~~~~z~===-:*:.:=
-- 20~0300 ----* c;,;;ijo1ati.g0emo111on "'"          -
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                    *SUM.v & Dlspose-or-ci.a.*Miien.i
- -* 20.0100---.

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                                                                                                                                    --.- ' -.... ,. -~-  *,- -                                                                          ----**-,-1--,--                                                                                   "                                         : -?;-- r-; +*H H*

I Fi1a1 Sile SUM!ys 2F.0700 Cooing Tower Demolllon

** y.0200 ---; !urbliie ~~~=~~!§:::-..:.===-~~.-

2F.0300 ' ControlBuldingAlea

                                                                              -*----- ___                                        1

_!>?:_.U-32 _,; 12-Apr-33__ .1.; __ : __ c_

21-Dec-33 : 11-Apr-34

                                                                                                                                                                                                                                                                                                                                                                                      - : . -~- ~- -~ --:- -:- -~. ~- -~ -~*

2F.011io- - Nrlnt...Tunnel - ---*------ ._.... ________ ,,_ -------*-*-*--: 12:Ai°i-,:-:i4-]'0i~34*-

--2'f:-o4oo ---Emerg.;,.;y D1esei<iene;a;;;;-.. -- --- - ... ** ..----.. - --*-............ , 02:A1iu-34 --, 24-0:t-34--                                                                                                                                                                                                                                                                     '6 2F.oooo --      ~-Sii.-       __ .. __ ....... ---------------                ------*--- *-- -: 25"-01.34,ow.;:35-2i=.iii00       Fin;iSae Restoraibii '- _____ ,, - --*-*--"" ... ____ ,,, - -. --.......... *-, 14-Fili):35"!_ 25-50P-35--
                                                                                                                                                                                                                                                                                        .. : ..:.. : ..:.; .. c..:.. :.c.; .. : __:__ ; __ c..:_; __ ;__ ; __                   c..:.:.:.. ;.. c ~...
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Appendix C-1 jcct TMl2*FF-01 Remaining Work

                                                                                                                                                                                                                                                         '1ted by; mlrndemachcr OS-0..-18 19;40 Remaining Work
                                                *Milestone summary Project Name:TMl2 Scenario 1

• DECON

PmityName

Pfo]edAwmdl NTP Amo *- *-, ucense.Amendment"Aj,p.ovedbyNRC ... **--* ----*. --*-- . -- -- --- i1:::in:41 07-Jan-19' .,

~~;:~=:.'.~~_{;~~~~~~~c-~ ~- ---~-=~~-*---~-~~--:~~~~-=1-* SNF I GTCC to DOE

• 12-Deo-53

                                                                                                                                . . . ,. ,. . *.; ., ~--:-***-~*-*                                        *'**~*-~--;       .; ..;...;. '**:*-~*-:*-*:*-~- ;.. ;..;--:---: .; .. ~.l ... **.***                      .   '
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~

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                                                                                                                                                                                                     -~

_: __ ; __ ; -:--~ -~--:--~*-: -~--~--~-~--:--~--~--~--:. .. .'.' .' .' '. 1C.0400 ' ~ntler Large Component Dose Redldlon -, 14-Jan.41 12-Deo-42 - -1c:o20o-

• Reader Internals Removai- *-- - - - -- - - - - - - - -!2i"°Aj,f-42 *--:-01-.kln-44..*,

                                                                               =

- 1c.0100 - - SteiimGeneraterciOS..RedudiOn-- *- ----* **-***- -,oJ-:iii::42*-,of:'"""-44-- -- 1c:il300- --:p;-;s;;.1miio5eil~ - ------ - ------** - , 27:AUii43-,01-:iiii=44  : ~: . B~~!..;l@i!CtiilK 10.0100 ' Reader Bulking Dose RedJdlon

J!!e:J~

                                                                                                  . 24-...,,-42 17-May-45
                                                                                                                                                                                                     --   ~-
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                                                                                                                                                                                                                                                                                                                                -~--

- 1 o.0200- *, Re.id0raitingeas;;.;;io;;s.A"~ --- -- ---- - - *os:N;,~- 04-0ci4s_,

-10.05~Aux1aryButiiig0ose Rediidkin- --- - -- -* * - -** 2.t:oeo:.3 .1s-=-..an:47 _                                           ,

1 0.o300- -l'ii0iH.ndiii90o5eR;;JdiO.____ - -- ---- * - * --* --,-,~-: W:-..an=47

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1E.0500 * ~ Heavy Equipment 14-Jan-41 11-NoY.44 ' '

• - *1e.ci400 . UQUid Riidw~e-Prooesslng &DISPOsai-- --- -----~!!".:~.1..__ _1~*~:~-

  --iE:?~<i§°_::_=-!-':'<R~flV~~~§ii~-::-~~~~                                                       19-Maf-43                                                                                                                 .----.-----.-- .----.- -, - ,-  ,   .----.-      -   -.----.----.-

1E.0310

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1F.0100 Rad Protection Program 27-Jan-40 iF.o8oo ::_:~oMS.:~~~llX~~_:_ __ =-:--=.:_: * -~-:-=-~=~~~~-y&.:iaiiJ1=: 22-Maf-41 ' 16*.Jan.47 1F.0200 I

                                                                                                                                                                                                                                                       ' ' ,"ry   f?f? .                      '

1F.0300 ----*-:o:J:Fet>.42!26-0:t~ _, 1 _ 1!!11!~,,!!IJ!ll*ld"1 1111 111d"'1"#-ll5!'" Pt.w1

                                                                                                                                                              ~    ~                          , ..*.                                                                                           : : *:
                                                                                                                                                                                                                                                                                       . ~ .. .. . . -~-. *:*.: .. :.. ~. *: . ~      :.                 ~*-~**:**~--~-~--~-

I 23-Aug-46 ' 14-Aug-47 2A.0400 ' LTP Preparation *-- * - ----*----<*ii-;;;;;46-- 14-iiiig.47

    - 2io200 ___ H.8Vil.rtllii9Qirigpiaimtng --*              --*- -- - - - ---*---* 30=AUg..ifi- l s-Jan-47 '

--21..0100- 7"~&MediiiniCaJ-p;-.pa;._,; - - - *- . --~ i7:.;a;.:47' 10:.lii-41-- ..

  - 2A.05oo - p;oJecl~~~~~~.~!§i *-- * --                                                           11-Jan.41 ** ------ * -
    ~
--    ~:~~--! ~~r-~ge-~~-~~---- *-***

• 1~--~2 _'~.k~_..1 ,, , , , " ....... .: I

~ Remaining Lewi of Effort                 1- - * ~ 1 Crltk:al Remaining Work                                                                                                     APPENDIX C*2                                                                                                   TMl2*fF-02
                                                                                                                                                                                                                                                                                      *eated hy: mlrademacher M-Dec.18 19:41
-             Actual Work                 +

• M!1eSk>ne Pro)ect Name:TMl2 Scenario 2
• SAFSTOR1 r:::::::::::J Remaining Work ~ summary

IAdM!yl AdWryName 20.0200 I Reaotor Vessel Removal

 -

• 28.i>>oo- -st.".;nGene.a1or iiemw.ii ___ _

  --* ---- -- MaliiCOOdefl....s RemoWi--**

I Reaotor Bull:llng Systems Remowl 2C:os10- - *ckiSSA was18l"<~DtSPOSai--- ---

 - 2C:Oioo___ Fi;a<:iO,. a.iung-~ un.,.- Re,,;;,y,;j -*-----
 --- 2C.OJOO-- --.FOOiH~iAU.larySystemsRemoYa!                   -   -- ---                                                                                                                                                                                        .. -:*. *:- - -.!*.: --; --, . , _-, _
                                                                                                                                                                                                                                                                      ~.             ~

20.0500 ' Turbine Bui<ing Rad Defno 20:0200-*- AUiiify u.;;g o8iiioiuon - -- - --- - - *--- * *- TM--;;;u:so -'26-0ct-s0-  : !!:;! : '

  -    2o:oeoo-- ~for BtJHiO-O.-mo..;..-- -- - - ---- - *--**-**, *;;:.Aug-s0 *-~s1 *-                                                                                                                  : ******** -< ..........
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                                                                                         ' 05-0d*51     15-NoY-51 r6 :

1:1 20:0100 *rsu;;;y&i:ii;p;,.. o1Cimi-Materl3!-*--- - *--- * - **---*,*ii5-0i-s1- 10-"'"s2 '

                                                                                                                                   '  '                                                                                                                              ;. ~--:--: -V*\:

2E.01 oo *Final Sile SUrwys 2F.o7oo * ' coOiiiQ tow.r Demollloo  ! :JG..lJl.48 22-Sep-49 ~ :: 1*=-=~~~--=~-~:~~~-~..:.-:~~~=~=----=~~-=--: ::-:.~*~:~::l:--*-- .... ; .. : ..:. . ..:.. .:..... : ..:. ..:. ..:.. ; .. : .. : ..:...~ : .

                                                                                                                                                                                                                                                                                         ~ .. ~ -.~. ~-. ~-. ~-. j. -~. -~ .
  - - ii'.ciioo ....

• Air 1n1ei<BTunnet______ **- --*----- --*- - - - **, 01-Mar--:-52-* 26-.lm-s2*-

  - 2F.040o . emerge;,cy*o.;;;iG;;Mf;;fur*- - -* *-. . -- -- - -*;*27:::-bn:-s2-*018:s.p.52
   --2F.ii600- -,83dd151ti! *--*-                 -***- - . - - -- -*. --.,-g:--sep:.52 ~ 3(j:Ajjf.'"53-

• 2F.os00-**; FlllaiSK.iR.Sto.aikJn- --*** - - *-- ---- -{Q6.F°,jjj:s:i -:*12.c;,:i;3

                                                                                                                                                 ***                                                    : --:.. .. :.. ...:. - ; --: - . ~ .. :.. ..:...: . ; .. : .. :. ..:.. ..:. -; _

• ~ :~: :' ~* :: 1 *':!!! 'e!!! i 2G.0100

• SNF/GTCC Storage Fldly Sealrly & Clperallons  ; 29-0:l-46 l2*Deo-53

                                                                                                                                  *,.*I** r *
                                                                                                                                              *~ * *,* * '
                                                                                                                                                         ~-
                                                                                                                                                            * **           p ..:._:** j*-i--t**:*                            -i*-i**t -:___:___:__ i* -J**t*-s *-:** j** j ** r **s --"

• t~i-*,;--~- -r 2G.o200-
• SNFJGTCC iiiSPOsikiii____ **-*- - *----- *--*--; i.i-o..>s~*12-oeo-5J-

 *- -2G.~:3§: ==- ~!'~~0t~'.'J!.!'..~-~~;~~-:~~~-: -~=~=-- ,-,_5-~~=- 06-~~-=                                      ::                                                                                                                                                                                    :-.-.-.-.

Remaining lellel of Effort Crilcal Remaining Wor1< APPENDIX C-2 ' TM12-FF-02

                                                                                                                                                                        ~'tied by: mlrademacber           05-Dec-18 19:41 Actual Work                   *

• Milestone Project Name:TMl2 Scenario 2 - SAFSTOR1 Remaining Work - summary

                                                                                    ,_...,.1e U08.lU6

~~- ___"!:*;'~'!'~~~p - 107..Jan.19*

                                                                                                                                                                        *~

A1170  : License Amendment ApprovedbyNRC

• i1106o - l'haS.. 1.co.;;piet.*- - -- - - * **
• 15-Jan-82 -f '

                                                                                  ---- --- --~~~:-1 ~--~--~*-:*                                         ,..., ...  ,.   ,....,' ......
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-=~~~ *--==~~~~:~~~~-~~~~=--=---- - _1_~-0eo:~_.1  : ~

-- A110o--- -, Piii1Sel1 compiot.. ---** - - .. ----- ....._ - ... - -* -- ---

SAFSTOR

                                                                                               ' 08*.M-95 l:!.---: J~

[r,:*-~ " .'l ";,W '~~. . 1E:ri!i11=1;1n:1m1i1;1111*1

                                                                                                         *" > .,.,.'.*.*'*.*,.' *.i_._'-.*'.**.'*.*.'*.**.*.**.**.**-.i.*.:*....* ...........- - - - - - - - - - - - - - -..

82

                                                                                                                                                                  ~-....

I 13-Feb-79 I 02-Jan-82 .

                                                                    --=--=~ .~3-Fe!!:~-.:::~~-82::t 24-.bl-80 '      02~*82
                                                                                                                  ....... *-.**:**.-******** ************1**.-
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1C.0400 Equipment 1or Large Component Dose Reduction ' 16-Jan-82 16-~M-I - - 1 c:0200 -*' 'R8aGiorllitema1s R';;;;;o.;ai- - - - --- * -* *------*2iiij;:ea--. c;w.;:95 * -*lC.010o-

• I Steam Generator Dose Redudlon - - - - - - - * - .. -, o7-.M-83 ""DS:::M,-es -

                                                                                                                                                                                                                                                                                                                                                      .. : .. ; . -:*. ~ .. :
-- 1c.o:i0o- -,p,;;w1m*o-0S..i18diidi0ii ___ ---- - * ---               - 3()-~

• 05-~.;.as ** ..... ~

Source termr m -- - - lf*'.t.iir'.I .. _-*~i~:~:~EzS~=~:~~=--~--~~-ia-:~J . . 10.0300 ~6'9Ci&b

                 . Fuel Handing Dose Reduction
                                                -*-            ' ..     :**"' ~~
                                                                                ' 2G-Feb-86 : 20-Jan-88
                                                                                                                                                                          .~   .

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1F.0100 Rad Protection Program 3(hlarMJ1 20-Jan-88 _ . 1!:~00-* - ~~~s~~§n1-~ltYse~_!- -

                                                               - -----'t 30-Jan-81              1
                                                                                  -- ----* -----*- 2()-Jan-88
                                                        -                  -: 2&Maf.a£ ..-20-~--
                                                          *-==~~-=--=~-~~-BI~ 30-0:t-81
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~ :::

                                                                                                                                                                                                                                                                            .. i .. ;~.. <*

2A.0300 Site Characterization c::::3 Remaining L.....i of Effort Remaining Work APPENDIX C*3 - AdualW0<k + +Milestone Project Name:TMl2 Scenario 3

• SAFSTOR2

~ Remaining Work

                                        -      summary

AdMtylO AdivilyName Slarf 2A.0400 LTP Preparation 21.:0200 * -; H9iWYUi-1*iiwno ~-* **

-*~2:A:~§:. -~- ~!Medi~~~~!:::=-:

2A.0500 28.0400

• Equipment lo< Large Component Removal 21-Jan-88 ' 02-Aug-89

 - --m0200-           ~ -Reador  ~SS81  Removat _____ - --               -** ------ - - - - - - - - - - -* ---***

• 1&-Feb-89 ! 07-Feb-90 20.0100 Steam Generator Removal *-- --- -* - ~kg:99 ; 09-May-90

    *-28.0300 ___ :.Main COOd8n90fs il8f00vai      ___ .

• 10..Mly.90
• 13--i'eb-91 _,

2C.0200 2C.0810 Reactor lluldlng Systems Removal 1 Class A Waste Transportation & Disposal

 - - - - - - - - - - - - - - - * - - - * - - - - - - - - - - - - ----- ------ 1
                                                                                               ' Oll-Feb-90 ' 30-Jan-91 08-Mar-90 14-Aug-91 2C.0100        , Reactor lluldlng Basement l.Jnef Removal                                 31-Jan-91      24-.kJ~91
 --2-c.m-- "(Fii.tiiaiidlng1Auxlarysys1ems fi.;;;;oy,jj*--* ---                      -    ---:1<1-Fe1>-ii1 20.0500       ' Turlllne - g Rad Demo                                                     14-Feb-91 ' 05-.kln-91
                                                                                                                                --:--t**i-*-:---;--             .. ,.. .,..., .. ,..,  .....                                                                                                                                                                                 ' '-,- . ;' **r' - .,'.. -,*' ' *,

2o.o~ -!~~~~= ~~- -*_--::=- ~=~--:-=~1~~.9:_91 -i~~9~

                                                                                                                                                                                                                                                                                                                                                                                                          -~-

L 20.0800 Equipment"" lluldlng Demomlon 115-Aug-91 ; 07-0ct-92

   . - 20.0400---     ! FuefH..Miig aJtin!i0ernoltiOn*--       -- -         ----------           31:cit~1'      2£:0eo-9J                                                                                                                                                                                                                           :~
    -* 20.0100 -*~ ileaci0rlluldlngoemolli0ri_____                  ---- -- *-- - * -*            ~oeo.91

• Q4:Mai-92 20:0600 -**, ik*linderg1o;;;;d~ ---- --- - --*- --- - OS:l.iar~ M&Y-92

                                                                                                                                                                                                                                                                        *-.--i***-         '. '                                                                                   .. , . .,.
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2D.0100 -- *-&iMY&DiSPis8 iii-C10a;Maie;1ai *--- ------ - --- --- *0&-0:t-:s2c-1.i::iii:ii3-rm1wm:;;;; ::: tsaa . . .  :~ : 2e.0100  :-~~Sile 5uMlys

                                                                                                                                                                                                                                                                                                                  . ~-.                ----.- -~~-~~~~-~~--~
                                                                                                                                                                                                                                                                                                                                                 ~     ~. *:*.-: .. : - *;-:- -:--:- -:- - -:- - :-
                                                                                                                                                                                                                                                                                                                                                                         ~.

2F.0700 I Cooing Tower Demomlon -. -- -. - - - - -- - -~-- - - * - --* *: 03-Aug-89 ' 26-Sep-90

 - 2F.il200- rurt1ne YiiU c1e6n-iiemoiicin-- --*- - --- -- **-- * --oo::iJn..91 -~11-Mar  *- --2F.0300 -

• contro1-e.;u.;gAr*a - - - - - - - - - *- -* - -------

2F.0100--, A1r1n1.ii;'runn01 --- --------- -- - --------:-11~Mar-93 -: ~93-* i~Noy:92 *-;* i0-M&f:93 ' :o : 2F.0600 - - ~Sit* -- - - - .-__ , -* .

      - 2F.o400- - -Emergency oi8s8ioe;;e;iit.;- - -*- * * - *- * -- - * * -- - -*--;*01:.A.93--. 22.se;;93*

i- - 2F.reoo----.FiiiisiieR!SiOriiiiOO-- -- - --- --- --- -- --- -- - -:10-Feb.94 1s.De<>94-23-s0p:93 7 Q4..t,;ay:94- --:- - .. : -- *:-. -

                                                                                                                                                                                                                                                                              ~         ~.    ~
-s:asaa*ll-*W ***
                                                                *"' *~ **** ** 0 ' '.2~~~                      w *                                                                                                                                                                         :                                     .: : ' .                  .                     :                          : :

2H.0100  ; Rad ProtedlOn Program ~*=:=¥ * * :4+(.s: : ** -~-- * >-+ * *-¥% 4 -(

 =                  -.
      ~~oo-* ~,;,s-&*P~~~s                                 ____ _                                                                                                                                - ..... --:-' - ... :.' -' -:-' . *:*' -                                                  ~ -~- *:- .. -........... -......... -**** ............. *-**- ... -.. - .......... *- - .-.. -.... -... -*- -.. -~ --:-- .... -

2H.0200 , Projed Management & Engineering

                                                                                                                                                                                                                  ~       ~.

2G.0100 1 SNFIGTCC Storage F~ SeaJrity & Operations

 -*-iG:0200-*:5N-i'1GrccOispos1tjO; *------- -----------                                         Deo-93

__________'.,16-lleo-94 _____ ---1

  =- !CiE~ ..:=~~~rc_c S1cii~ii~i'a<itfoeoo1~~-~:~_:_                       ____                  1&-.kJl.94    08-.kJl.95    .                                                                                                                                                                                                                                                                        ,._...._........

Remaining Level of Effort Remaining Work APPENDIX c-3 Thfl2-FF-O:l

                                                                                                                                                                                                                                                                                *e.'l(ed by: mlradcmachcr 05-0cc-18 19:43 Actual Work                   *

• Milestone Project Name:TMl2 Scenario 3 - SAFSTOR2 Remaining Work _....summary

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev.O APPENDIX D 0-1-0etailed Cost Estimate-DECON

                           . 0 Detailed Cost Estimate - SAFSTORl 0 Detailed Cost Estimate - SAFSTOR2

Appendix 0-1 Three Mlle Island Unit 2 Scenario 1- DECON ESTIMATE (thousands of 2018 dollars)

-l=-1                                  -o..atptlon I .........

Colt 1 =1=.1~1 -- I Dllpoiel: OhrlMnct c:ost(ODQ I~ I T~Colt

                                                                                                                                                  '        ~         La-T.......... I Menlpi-
                                                                                                                                                                                  ~~        I

• R-.ilan la.1 Planning & Procedures 218 - - - 4,945 1,549 6,713 5,370 1,343 -

la.2 Heavy Lift I Rigging Planning - - 1,019 510 1,529 1,529 - la.3 Planning Management & Engineering - 371 - 930 661 1,962 1,962 - 1a Total Planning & Transition FoUowlng Dormancy . 589 . . . 6,894 2,no 10,203 8,861 1,343 . . 1b.1 Building Modifications & Preparations 1,171 1,246 - . 11,276 4,793 18,486 18,486 11,695 lb.2 Design & Procure GTCC & SNF tasks - 17,680 - - - - 4,420 22,100 16,575 5,525 - 1b.3 SNF/GTCC Interim Storage Facility . . . . . 7,800 780 8,580 6,435 2,145 1b.4 Rall & Transportation Upgrades - . - - 1,681 671 2,352 2,352 . lb Total Site Upgrades & Preparations 1,171 18,926 - . . 20,757 10,664 51,517 43,847 7,670 . 11,695 1c.l Steam Generator Dose Reduction 2,652 562 1,532 2,906 8,434 - 5,630 21,717 17,374 4,343 8,776 1c.2 Reactor Internals Removal 8,180 774 504 165 2,592 . 9,240 21,455 17,164 4,291 72,358 lc.3 Pressurizer Dose Reduction 332 5 288 158 1,897 437 935 4,052 4,052 1,240 1c.4 Equipment for large Component Dose Reduction . 12,806 . - - - 5,122 17,929 14,343 3,586 - le Total Large Component Source Tenn Reduction 11,164 14,148 2,325 3,228 12,923 437 20,927 65,152 52,932 12,220 - 82,374 1d.1 Reactor Building Dose Reduction 4,737 251 1,686 4,088 67,729 - 20,320 98,812 98,812 43,144 ld.2 Reactor Building Basement Dose Reduction 1,792 1,239 1,209 3,136 59,214 - 20,705 87,295 87,295 17,887 ld.3 Fuel Handllng Dose Reduction 2,446 258 116 298 4,315 - 1,924 9,356 9,356 24,422 ld.4 Equipment for Building Dose Reduction - 2,374 . . - - 1,187 3,562 3,562 ld.5 Auxiliary Building Dose Reduction 1,265 388 398 785 11,251 - 4,226 18,314 18,314 12,628 ld Total Building Source Term Reduction 10,240 4,510 3,409 8,307 142,509 . 48,362 217,338 217,338 . . 98,081 le.1 Small Tools & Consumables - 8,872 - . . 2,297 11,169 11,169 - le.2 Decon Equipment & Supplies 422 16,815 794 1,024 1,501 4,699 7,292 32,547 32,547 4,212 le.3 Misc Rad Waste Processing & Disposal 5,68S 2,951 347 494 3,205 968 5,460 19,110 19,110 66,577 le.4 Liquid Rad Waste Processing & Disposal - 455 - 1,953 3,205 785 2,559 8,957 8,957 le.5 Misc Heavy Equipment - 1,133 1 28 387 86 654 2,288 2,288 - le Total Undistributed Direct Costs 6,107 30,226 1,142 3,499 8,297 6,538 18,262 74,071 74,071 . . 70,790 lf.l Rad Protection Program 42,108 17,651 - - - 102 16,162 76,023 68,421 7,602 525,212 lf.2 Project Management & Engineering 114,489 - - - - 13,536 31,590 159,614 143,653 15,961 866,539 lf.3 Security Staff & Equipment 7,301 569 - - - 8,420 3,491 19,780 14,835 4,945 93,600 lf.4 Environmental Program 2,146 - - - - 1,375 1,331 4,852 4,367 485 28,710 lf.5 Insurance . . - - - 14,885 4,046 18,931 17,038 1,893 - lf.6 Property Taxes & Fees . - - - - 1,021 510 1,531 1,378 153 . lf.7 Safety Program & Training 2,934 1,300 . - - 4.497 3,056 11,787 10,608 1,179 37,620 lf.8 PDMS and Plant Security Services - - - - . 37,278 3,728 41,005 41,005 lf.9 Corporate Allocations & Financing - . 25,174 5,035 30,209 27,188 3,021 - Page 1of3

Appendix 0-1 Three Mile Island Unit 2 Scenario 1 - DECON ESTIMATE (thousands of 2018 dollars) Period 'I=-1 Item Desalptlon I Labor

                                                             ~         1~*1
                                                                        ~            w-hcbPil      I - I -.

Transpor1atlon Dl$pOSllf 1~~1

                                                                                                                               ~ (OIX) COllllnpncy IT~~

(EstlmM8d} u..n... I Tennlnlltlon J Spent Fuel I Site R-.tlan ~ lf.10 Energy Costs - - - - 10,262 2,565 12,827 11,545 1,283 - lf.11 NRC Fees & Inspections 3,361 - - - 17,232 7,208 27,801 20,851 6,950 44,055 1f.12 Temporary Facilities 32 - - - - 3,536 1,204 4,771 4,294 477 288 1f Total Undistributed Indirect Costs 172,371 19,519 - - - 137,317 79,926 409,13'1 365,184 43,950 - 1,596,024 Phase 1 Total - Source Term Risk Reduction 201,053 87,918 6,877 15,034 163,729 171,942 180,861 827,415 762,232 65,183 . 1,858,963 2a.1 Electrical & Mechanical Preparations - 343 - - - 1,182 263 1,788 1,430 358 . 2a.2 Heavy lift/ Rigging Planning - - - - - 941 162 1,103 883 221 - 2a.3 Site Characterization 252 267 . 1,735 389 2,643 2,643 3,720 2a.4 LTP Preparation 670 - - 600 219 1,489 1,489 3,720 2a.5 Project Management & Engineering - - - - 296 51 347 277 69 - 2a Total Planning & Transition following Phase 1 922 609 - - - 4,753 1,085 7,369 6,722 - 648 7,440 2b.1 Steam Generator Removal 1 0 3 36 1,075 193 1,308 1,308 - 2b.2 Reactor Vessel Removal 2,715 - 3,155 352 1,736 - 1,374 9,332 9,332 28,320 2b.3 Main Condensers Removal 29 l 2 38 472 93 635 635 316 2b.4 Equipment for Large Component Removal 480 5,492 3 86 1,064 6,000 2,265 15,390 15,390 5,158 2b Total Large Components Removal 3,224 5,494 3,161 478 3,308 7,fT75 3,925 26,665 26,665 . . 33,794 2c.1 Reactor Building Basement liner Removal 238 383 5 247 1,207 0 390 2,470 2,470 2,583 Zc.2 Reactor Building Systems Removal 779 454 9 228 2,835 - 743 5,048 5,048 8,438 2c.3 Fuel Handling I Auxiliary Systems Removal 3,443 1,110 39 970 11,209 0 2,895 19,666 19,666 37,310 2c Total Rad Building Systems Removal 4,461 1,946 53 1,446 15,251 0 4,028 27,184 27,184 - . 48,331 2d.1 Reactor Building Demolition 1,393 248 211 5,378 30,367 1 6,515 44,112 44,112 15,089 2d.2 Auxiliary Building Demolition 61 55 24 758 5,060 - 1,090 7,049 7,049 661 2d.3 Control Building Demolition 409 480 54 475 2,282 0 698 4,397 4,397 4,427 2d.4 Fuel Handling Building Demolition 1,744 75 10 873 2,772 15 988 6,477 6,477 18,897 2d.5 Turbine Building Rad Demo 33 147 8 187 2,327 - 466 3,168 3,168 357 Zd.6 Misc Underground Piping 267 3 - 11 (39) - 42 283 283 2,896 2d.7 Survey & Dispose of Clean Material 3,038 880 72 8,859 12,440 4,365 29,654 29,654 32,916 Zd.B Equipment for Building Demolition 5,877 - - - 1,014 6,892 6,892 2d Total Rad Bulldlng Demolltlon 6,944 7,764 379 16,540 55,209 16 15,179 102,032 102,032 - - 75,243 2e.1 Final Site Surveys 2,962 1,104 - - - 422 775 5,264 5,264 43,725 2e.2 Misc Materials & Supplies . - - - 1,196 206 1,403 1,403 - ze.3 Disposal of Contaminated Soils - - - 408 6,947 - 1,269 8,623 8,623 2e Total license Termination 2,962 1,104 - 408 6,947 1,618 2,251 15,Z!lll 15,290 43,725 Page2 of 3

Appendix D-1 Three Mile Island Unit Z Scenario 1- DECON ESTIMATE (thousands of 2018 dollars)

~      1.=-1                          -  Desatptlon              I lallor COit      I'::!I :.:. l~I                             Wmte Dllpclllll IOhr    Dnct COit (ODC)   IConllllpncy I  Tatm Coa (lstlineted) tar.

Termlllmtlon I s,.,. M11111111-.t I ~ 11-.tloll M8n-ffaurs Zf.1 Air Intake Tunnel 201 146 0 52 (91) 15 56 378 378 2,173 Zf.Z Turbine Building Clean Demolition l,640 206 16 191 (432) 15 321 1,957 1,957 17,769 Zf.3 Control Building Area 511 822 0 200 (723) - 165 975 975 5,538 2f.4 Emergency Diesel Generator 373 59 0 48 (172) - 64 373 373 4,044 Zf.5 Final Site Restoration - - - - - 15 8 23 23 - Zf.6 Backfill Site 6,865 4,223 - - 176 1,944 13,208 13,208 74,380 Zf.7 Cooling Tower Demolition 452 - - - - 11,492 2,062 14,005 14,005 4,894 2fTotal Site Restoration 10,041 5,457 17 492 {1,419) 11,713 4,619 30,920 - - 30,920 108,799 Zg.1 Rad Protection Program 15,916 9,519 - - - 3,593 5,011 34,039 34,039 204,057 Zg.2 Project Management & Engineering 62,578 - - - 5,903 11,811 80,292 64,233 16,058 560,010 Zg.3 Environmental Program 1,139 - - - - 726 322 2,186 1,749 437 14,685 Zg.4 PDMS & Plant Security Services - - - - 11,160 1,926 13,086 10,469 2,617 - Zg.5 ANl/NEll/Other Insurance - - - - - 6,120 1,056 7,176 5,741 1,435 - Zg.6 Property Taxes & Fees - - - - - 34 10 44 35 9 Zg.7 Energy Costs - - - 3,562 615 4,176 3,341 835 - Zg.8 Safety & Training Program - - - - 2,354 406 2,761 2,209 552 - Zg.9 NRCFees - - - - - 6,503 1,123 7,626 7,626 - 2g Total Undistributed Indirect Costs 79,633 9,519 - - - 39,955 U,280 151,386 129,442 - 21,944 778,752 Phase 2 Total - Decommissioning & License Tennlnatlon 108,187 31,1194 3,609 19,363 79,295 65,131 53,366 360.841i 307,334 - 53,512 1,096,085 3a.1 SNF/GTCC Storage Facility Security & Operations 28,080 - - - - 17,520 6,840 52,440 39,330 13,110 390,000 3a.2 SNF/GTCC Disposition - - 1,530 1,584 36,680 3,120 12,874 55,788 41,841 13,947 - 3a.3 SNF/GTCC Storage Facility Decommission - - - - 2,400 480 2,880 1,728 S76 S76 - 3a Total SNF/GTCC Interim Storage & Disposition 28,080 - 1,530 1,584 36,680 23,040 20,194 111,108 82,899 27,633 576 390,000 Phase 3 Total - SNF/GTCC Interim Storage & Disposition 28,080 - 1,530 1,584 36,680 23,040 20,194 111,108 82,899 27,633 576 390,000 Grand Total 337,321 119,112 12,016 35,980 279,705 2&0,113 2S4,4U l,299,361 1,152,465 92,815 54,CJl8 3,345,047 Page 3 of 3

Appendix D-2 Three Mlle Island Unit 2 Scenario 2

• SAFSTORl ESTIMATE (thousands of 2018 dollars)

Period 1..::..l - OesalpttiMI

                                                         ~

I c...t

                                                                              ,_.. I
                                                                               ~
                                                                                           'W -      I    w-

_ hcUllnl_ _TranspartMM l -- l -- 1 Disposal ~IODCI bnct - ~ncy I Tataleost a ;r-IJCenM I Spent M*~

                                                                                                                                                                                          '*'   I -

Site --... Oa.1 PDMS Monitoring - - - 55,800 6,863 62,663 62,663 - Oa Total PDMS Monitoring - - - - - 55,800 6,863 62,663 62,663 - - - Phase 0 Total* SAFSTOR - - - - - 55,800 6,1163 62,663 62,663 - - - la.1 Planning & Procedures 218 - - 4,945 1,549 6,713 5,370 1,343 - la.2 Heavy lift/ Rigging Planning - - - 1,019 510 1,529 1,529 - la.3 Planning Management & Engineering - 371 - 930 661 1,962 1,962 la Total Planning & Transition Followlng Dormancy - 589 - - - 6,894 2,no 10,203 8,861 1,343 - - lb.1 Building Modifications & Preparations 1,171 1,246 - - 11,276 4,793 18,486 18,486 11,695 lb.2 Design & Procure GTCC & SNF Casks - 17,680 - - 4,420 22,100 16,575 5,525 - lb.3 SNF/GTCC Interim Storage Facility - - - 7,800 780 8,580 6,435 2,145 lb.4 Rail & Transportation Upgrades - - - 1,681 671 2,352 2,352 lb Total Site Upgrades & Preparations 1,171 18,926 - - 20,757 10,664 51,517 43,847 7,670 11,695 lc.1 Steam Generator Dose Reduction 2,652 562 1,532 2,906 8,434 - 5,630 21,717 17,374 4,343 8,776 lc.2 Reactor lntemals Removal 8,180 774 504 165 2,592 9,240 21,455 17,164 4,291 72,320 lc.3 Pressurizer Dose Reduction 332 5 288 158 l ,897 437 935 4,052 4,052 1,240 lc.4 Equioment for Large Component Dose Reduction - 12,806 - - 5,122 17,929 14,343 3,586 le Total Large Component Source Term Reduction 11,164 14,148 2,325 3,228 12,923 4:17 20,927 65,152 52,932 12,220 - 82,374 ld.1 Reactor Building Dose Reduction 4,737 251 1,686 4,088 67,729 20,320 98,812 98,812 43,144 ld.2 Reactor Building Basement Dose Reduction 1,792 1,239 1,209 3,136 59,214 20,705 87,295 87,295 17,887 ld.3 Fuel Handling Dose Reduction 2,446 258 116 298 4,315 - 1,924 9,356 9,356 24,422 ld.4 Equipment for Building Dose Reduction - 2,374 - - - 1,187 3,562 3,562 - ld.5 Auxiliary Building Dose Reduction 1,265 388 398 785 11,251 - 4,226 18,314 18,314 12,628 1d Total Building Source Term Reduction 10,240 4,510 3,409 8,307 142,509 - 48,362 217,338 217,338 - - 98,081 le.1 Small Tools & Consumables - 8,872 - - 2,297 11,169 11,169 - le.2 Decon Equipment & Supplies 422 16,815 794 1,024 1,501 4,699 7,292 32,547 32,547 4,212 le.3 Misc Rad Waste Processing & Disposal 5,685 2,951 347 494 3,205 968 5,460 19,110 19,110 66,577 le.4 Liquid Rad Waste Processing & Disposal 455 - 1,953 3,205 7B5 2,559 8,957 8,957 - le.5 Misc Heavy Equipment 1,133 1 28 387 86 654 2,288 2,288 le Total Undistributed Direct Costs 6,107 30,226 1,142 3,499 8,297 6,538 18,262 74,071 74,071 - - 70,790 lf.1 Rad Protection Program 42,108 17,651 - - - 102 16,162 76,023 68,421 7,602 525,212 lf.2 Project Management & Engineering 114,489 - - - 13,536 31,590 159,614 143,653 15,961 866,539 lf.3 Security Staff & Equipment 7,301 569 - - 8,420 3,491 19,7RI 14,835 4,945 93,600 lf.4 Environmental Program 2,146 - - - 1,375 1,331 4,852 4,367 485 28,710 lf.5 Insurance - - - 14,885 4,046 18,931 17,038 1,893 lf.6 Prooertv Taxes & Fees - 1.021 510 1,531 1,378 153 - Page 1of3

Appendix D-2 Three Mlle Island Unit 2 Scenario 2 - SAFSTORl EmMATE (thousands of 2018 dollars) Per1od 1=.1 ..... Delcrlplloft I ......... Colt I:= I ,::. IrrwW:.... I w.. -J:::1~1 DllpoAI Tot81Colt ..._. I Tlmllnltlon

                                                                                                                                                                            $pent fMI Ml . .*1*1t I -

llatarltlon

                                                                                                                                                                                                         ~

lf.7 Safetv Program & Trainin2 2,934 1,300 4,497 3,056 11,787 10,608 1,179 37,620 lf.8 PDMS & Plant Securly Services - - - - 37,278 3,728 41,005 41,005 - lf.9 Corporate Allocations & Financin2 - - - 25,174 5,035 30,209 27,188 3,021 - lf.10 Energy Costs - - - - 10,262 2,565 12,827 11,545 1,283 lf.11 NRC Fees & Inspections 3,361 - - 17,232 7,208 27,801 20,851 6,950 44,055 lf.12 Temporarv Facilities 32 - 3,536 1,204 4,771 4,294 477 288 1f Total Undistributed Indirect Costs 1n,311 19,519 - - - 137,317 79,926 409,1311 365,184 43,950 - 1,596,024 Phase 1 Total - Source Term Risk Reduction 201,053 87,918 6,8T1 15,034 163,729 171,942 180,861 827,415 762,232 65,183 - 1,858,963 2a.1 Electrical & Mechanical Preparations - 343 - - - 1,182 263 1,788 1,430 358 - Za.2 Heavy Lift I Rigging Planning - - - - 941 162 1,103 883 221 - 2a.3 Site Characterization 252 267 - 1,735 389 2,643 2,643 3,720 Za.4 l TP Preparation 670 - - - 600 219 1,489 1,489 3,720 2a.S ProJect Management & Engineering - - 296 51 347 277 69 - 2a Total Planni111 & Transition following Phase 1 922 609 - - - 4,753 1,085 7~ 6,722 - ti4ll 7,440 2b.1 Steam Generator Removal - 1 0 3 36 1,075 193 l,3DI! 1,308 - 2b.2 Reactor Vessel Removal 2,715 - 3,155 352 1,736 - 1,374 9,332 9,332 28,320 2b.3 Main Condensers Removal 29 1 2 38 472 - 93 635 635 316 2b.4 Equipment for Large Component Removal 480 5,492 3 86 1,064 6,000 2,265 15,39C 15,390 5,158 2b Total Large Components Removal 3,224 5,494 3,161 478 3,308 7,075 3,925 26,665 26,665 - - 33,794 2c.1 Reactor Building Basement Liner Removal 238 383 5 247 1,207 0 390 2,470 2,470 2,583 2c.2 Reactor Building Systems Removal 779 454 9 228 2,835 743 5,048 5,048 8,438 2c.3 Fuel HandllnE / Auxiliarv Systems Removal 3,443 1,110 39 970 11,209 0 2,895 19,666 19,666 37,310 2c Total Rad Building Svct""'s Removal 4,461 1,946 53 1,446 15,251 0 4,028 27,184 27,184 - - 48,331 2d.1 Reactor Building Demolition 1,393 248 211 5,378 30,367 1 6,515 44,112 44,112 15,089 2d.2 Auxiliary Building Demolition 61 55 24 758 5,060 - 1,090 7,049 7,049 661 2d.3 Control Building Demolition 409 480 54 475 2,282 0 698 4,397 4,397 4,427 2d.4 Fuel Handling Building Demolition 1,744 75 10 873 2,772 15 988 6,477 6,477 18,897 2d.5 Turbine Building Rad Demo 33 147 8 187 2,327 - 466 3,168 3,168 357 2d.6 Misc Underground Piping 267 3 - 11 (39) - 42 283 283 2,896 2d.7 Survey & Dispose of Clean Material 3,038 880 72 8,859 12,440 - 4,365 29,654 29,654 32,916 2d.8 Equipment for Building Demolition - 5,877 - - - 1,014 6,892 6,892 2d Total Rad Buildlns Demolition 6,944 7,764 379 16,540 55,209 16 15,179 102,032 102,032 - - 75,243 2e.1 Final Site Surveys 2,962 1,104 - - - 422 775 5,264 5,264 43,725 2e.2 Misc Materials & Supplies - - - 1,196 206 1,403 1,403 - 2e.3 Disposal of Contaminated Soils - - 408 6,947 - 1,269 8,623 8,623 2e Total License Termination 2,962 1,104 - 408 6,947 1,618 2,251 15,Z!lll 15,290 - - 43,725 Page 2 of 3

Appendix D-2 Three Mlle Island Unit 2 Scenario Z - SAFSTORl ESTIMATE Perk>d 1.=..I 2f.1 2f.2 Air Intake Tunnel

                                       -OesalpClan Turbine Building Clean Demolition I    Lobor QISt 201 1,640 1-*1 *- I
                                                                                 ~

146 206 {thousands of 2018 dollars) hrbClnl 0 16 Wnte n-po118tlon 52 191 I - Disposal (91) (432) 1:.:1~1 15 15 56 321 Tocalc:ost' 378 1,957 license T~ I Spent Fuel

                                                                                                                                                                                    ...,_.,_t I -

Siie 378 1,957

                                                                                                                                                                                                                -   2,173 17,769 2f.3     Control Building Area                                      511       822           0             200         (723)                  165          975                                       975     5,538 2f.4      Emergency Diesel Generator                                373        59           0              48         (172)            -      64          373                                       373     4,044 2f.5      Final Site Restoration                                      -                                                  -            15       8             23                                      23 2f.6      Backfill Site                                          6,865      4,223                                        -           176   1,944      13,208                                    13,208     74,380 2f.7     Cooling Tower Demolition                                   452                     -                            -        11,492   2,062      14,005                                    14,005      4,894 2f Total Site Restoration                                                10,041      5,457          17             492       (1,419)       11,713   4,619      30,92~              -             -      30,9211    108,799 2g.1     SNF/GTCC Storage Facility Security & Operations         5,616          -           -                            -         4,884   1,325      11,825         8,869          2,956                  93,600 2g.2     SNF/GTCC Disposition                                         -         -       1,530           1,584       36,680         3,120  12,874      55,788        41,841        13,947                       -

2g.3 SNF/GTCC Storage Facilitv Decommission - - - - 2,400 480 2,880 1,728 576 576 2g Total SNF/GTCC Interim Storage & Disposition 5,616 - 1,530 1,584 36,680 10,404 14,679 70,493 52,438 17,479 576 93,600 2h.1 Rad Protection Program

• 15,916 9,519 - 3,593 S,011 34,039 34,039 204,057 2h.2 Project Management & Engineering 62,578 - - 5,903 10,900 79,38( 63,504 15,876 560,010 2h.3 Environmental Program 1,139 - - - 726 322 2,186 1,749 437 14,685 2h.4 PDMS & Plant Security Services - - - - 11,160 1,926 13,086 10,469 2,617 -

2h.S ANl/NEIL/Other Insurance - - - - - 6,120 1,056 7,176 5,741 1,435 - 2h.6 Property Taxes & Fees - - - - 34 10 44 35 9 - 2h.7 Energy Costs - - 3,562 615 4,176 3,341 835 - 2h.8 Safetv & Training Program - - - - - 2,354 406 2,761 2,209 552 2h.9 NRC Fees 6,503 1,123 7,626 7,626 2h Total Undistributed Indirect Costs 79,633 9,519 - - - 39,955 21,368 150,475 128,713 - 21,762 na,152 Phase 2 Total - Decommissioning & Ucense Termination 113,803 31,894 5,140 20,946 115,976 75,535 67,134 430.421 359,043 17,479 53,905 1,189,685 Grand Total llb 314,157 119,IU 12.0U JS,lllO 27!1,105 ~ II 903,277 254;159 1.3Z0.50I 1,113,939 IZ,662 53,905 3,1)48,647 Page3 of3

Appendix D-3 Three Mlle Island Unit 2 Scenario 3 - SAFSTOR2 DETAILED ESTIMATE (thousands of 2018 dollars) Period 1.=..1 - u.oatpllon I ........ CDlt 1:::1 w.ste l'llCbllnl *- ,I - I'Olllw-.i I~ I In...-..,. DllpoAI ' Clllt IODCI II Totm!Cost

                                                                                                                                                            ~

Licea. T9l'l'ltlnMlon I 5-t ~ 111111pment I - Restontion

                                                                                                                                                                                                                   ~

oa.1 PDMS Monitoring - - - - - 182,900 22,497 205,397 205,397 Oa Total PDMS Monitoring - - - - 112,900 22,497 205,397 205,397 - - - Phase 0 Total - SAFSTOR - - - - - 112,900 22,497 205,397 205,397 - - - 1a.1 Planning & Procedures 218 - - 4,945 1,549 6,713 5,370 1,343 - 1a.2 Heavy Lift/ Rigging Planning - - - 1,019 510 1,529 1,529 la.3 Planning Management & Engineering 371 - - 930 661 1,962 1,962 la Total Planning & Transition Following Dormancy - 589 - - - 6,894 2,720 10,203 8,861 1,343 - - 1b.1 Building Modifications & Preparations 1,171 1,246 - - 11,276 4,793 18,486 18,486 11,695 1b.2 Design & Procure GTCC & SNF casks 17,680 - 4,420 22,100 16,575 5,525 1b.3 SNF/GTCC Interim Storage Facility - 7,800 780 8,580 6,435 2,145 - 1b.4 Rall & Transportation Upgrades - - - 1,681 671 2,352 2,352 - lb Total Site Upgrades & Preparations 1,171 18,926 - - - 20,757 10,664 51,517 43,847 7,670 - 11,695 1c.1 Steam Generator Dose Reduction 2,652 562 1,532 2,906 8,434 - 5,630 21,717 17,374 4,343 8,776 1c.2 Reactor Internals Removal 8,180 774 504 165 2,592 9,240 21,455 17,164 4,291 72,320 1c.3 Pressurizer Dose Reduction 332 5 288 158 1,897 437 935 4,052 4,052 1,240 1c.4 Equipment for Large Component Dose Reduction - 12,806 - - - - 5,122 17,929 14,343 3,586 - le Total Large Component Source Term Reduction 11,164 14,148 2,325 3,228 12,923 437 20,927 65,152 52,932 12,220 - 82,374 1d.1 Reactor Building Dose Reduction 4,737 251 1,686 4,088 67,729 20,320 98,812 98,812 43,144 ld.2 Reactor Building Basement Dose Reduction 1,792 1,239 1,209 3,136 59,214 - 20,705 87,295 87,295 17,887 ld.3 Fuel Handling Dose Reduction 2,446 258 116 298 4,315 - 1,924 9,356 9,356 24,422 ld.4 Equipment for Building Dose Reduction - 2,374 - - - - 1,187 3,562 3,562 1d.5 Auxiliary Building Dose Reduction 1,265 388 398 785 11,251 - 4,226 18,314 18,314 12,628 ld Total Building Source Term Reduction 10,240 4,510 3,409 1,307 142,509 - 48,362 217,338 217,338 - - 98,081 1e.1 Small Tools & Consumables - 8,872 - - 2,297 11,169 11,169 - le.2 Decon Equipment & Supplies 422 16,815 794 1,024 1,501 4,699 6,538 31,793 31,793 4,212 le.3 Misc Rad Waste Processing & Disposal 5,685 2,951 347 494 3,205 968 5,460 19,110 19,110 66,577 le.4 Liquid Rad Waste Processing & Disposal - 455 - 1,953 3,205 785 2,559 8,957 8,957 - le.5 Misc Heavy Equipment - 1,133 1 28 387 86 654 2,288 2,288 l e Total Undistributed Direct Costs 6,107 30,226 1,142 3,499 8,297 6,538 17,508 73,317 73,317 - - 70,790 lf.1 Rad Protection Program 42,108 17,651 - - 102 16,162 76,023 68,421 7,602 525,212 lf.2 Project Management & Engineering 114,489 - - - - 13,536 31,590 159,614 143,653 15,961 866,539 lf.3 Security Staff & Equipment 7,301 569 - - 8,420 3,491 19,780 14,835 4,945 93,600 lf.4 Environmental Program 2,146 1,375 1,331 4,852 4,367 485 28,710 Page lof 3

Appendix D-3 Three Mlle Island Unit 2 Scenario 3 - SAFSTOR2 DETAILED ESTIMATE I .... I .... I {thousands of 2018 dollars) Perk>d 1.=..1 - Deoalplloll GOit 1::::1 -- I hcbllnlT,. ~ w- Dlspoal Other Dnct CostlODCI I~ I l~I T. . Cost lkenM TennlNtlon I Spn,. MeMplMftt I - Restontlon Man-Houn lf.5 Insurance - - 14,88S 4,046 18,931 17,038 1,893 - lf.6 Property Taxes & Fees - - - 1,021 SlO 1,531 1,378 153 - lf.7 Safety Program & Training 2,934 1,300 - 4,497 3.0S6 11,787 10,608 1,179 37,620 1f.B PDMS & Plant Securiy Services - - - - 37,278 3,728 41,005 41,00S - lf.9 Corporate Allocations & Financing - - - - - 2S,174 S,03S 30,209 27,188 3,021 - lf.10 Energy Costs - - - - 10,262 2,S6S 12,827 11,S4S 1,283 - lf.11 NRC Fees & Inspections 3,361 - - - - 17,232 7,208 27,801 20,8Sl 6,9SO 44,0SS lf.12 Temporary Facilities 32 - - - 3,S36 1,204 4,771 4,294 477 288 1f Total Undistributed Indirect Costs 172,371 19,519 - - - 137,317 79,926 409,134 365,184 43,950 - 1,596,024 Phase 1 Total - Source Tenn Risk Reduction 201,053 87,918 6,877 15,034 1H,n9 171,942 180,107 826,661 761,478 65,W - 1,858,!H 2a.1 Electrical & Mechanical Preparations 343 - - - 1,182 263 1,788 1,430 358 - 2a.2 Heavy Lift I Rigging Planning - - 941 162 1,103 883 221 2a.3 Site Characterization 2S2 267 - - - 1,73S 389 2,643 2,643 3,720 2a.4 LTP Preparation 670 - 600 219 1,489 1,489 3,720 2a.5 Project Management & Engineering - - 296 51 347 277 69 - Za Total Planning & Transition following Phase 1 922 609 - - - 4,753 1,DB5 7,369 6,722 - 648 7,440 2b.1 Steam Generator Removal - 1 0 3 36 1,075 193 1,308 1,308 - Zb.2 Reactor Vessel Removal 2,71S - 3,155 352 1,736 - 1,374 9,332 9,332 28,320 Zb.3 Main Condensers Removal 29 1 2 38 472 93 635 635 316 2b.4 Equipment for Large Component Removal 480 5,492 3 86 1,064 6,000 2,265 15,390 15,390 S,158 2b Total Large Components Removal 3,224 5,494 3,161 478 3,308 7,075 3,925 26,665 26,665 - - 33,794 2c.1 Reactor Building Basement liner Removal 238 383 5 247 1,207 0 359 2,440 2,440 2,583 Zc.2 Reactor Building Systems Removal 779 454 9 228 2,835 743 5,048 5,048 8,438 2c.3 Fuel Handling I Auxiliary Systems Removal 3,443 1,110 39 970 11,209 0 2,895 19,666 19,666 37,310 2c Total Rad Building Systems Removal 4,461 1,946 53 1,446 15,251 0 3,997 27,153 27,153 - . 48,331 2d.1 Reactor Building Demolition 1,393 248 211 5,378 30,367 1 6,490 44,087 44,087 15,089 2d.2 Auxiliary Building Demolition 61 SS 24 7S8 S,060 - 1,029 6,987 6,987 661 2d.3 Control Building Demolition 409 480 S4 47S 2,282 0 639 4,338 4,338 4,427 2d.4 Fuel Handling Building Demolition 1,744 7S 10 873 2,772 lS 947 6,436 6,436 18,897 2d.5 Turbine Building Rad Demo 33 147 8 187 2,327 - 466 3,168 3,168 3S7 Zd.6 Misc Underground Piping 267 3 11 (39) 42 283 283 2,896 Zd.7 Survey & Dispose of Clean Material 3,038 880 72 8,8S9 12,440 4,36S 29,6S4 29,6S4 32,916 2d.B Equipment for Building Demolition - S,877 - . . 1,014 6,892 6,892 - 2d Total Rad Building Demolition 6,944 7,764 379 16,540 55,209 16 14,991 101,845 101,845 . . 75,243 2e.1 Final Site Surveys 2,962 1,104 - - - 422 77S 5,264 5,264 43,725 Page 2of3

Appendix D-3 Three Mlle Island Unit Z Scenario 3 - SAFSTOR2 DETAILED ESTIMATE Period i.=::.. I Ze.Z

                                      -  Dncrlpllon Misc Materials & Supplies I labor Cost 1.-w.a*1..........
                                                                                  ~
                                                                                                -- I,.,.,w- I

__ -- I (thousands of 2018 dollars) Dllpoul Othw Direct Cost (OOC) 1,196 Icana._ 206 I TotaJ Cost (llllrMted) 1,403 lk8na T-1,403 I ~ - I II-

                                                                                                                                                                                               -....i-11 stt.       MMl-lloln Ze.3     Disposal of Contaminated Solis                                -           -            -              408        6,947              -      1,269           8,623       8,623 2e Total Ucense Termination                                                 2,962       1,104            -              408       6,947           1,618      2,251          15,2911     15,290              -           -     43,725 2f.1     Air Intake Tunnel                                           201         146            0               52          (91)            15         56              378                                   378      2,173 Zf.2     Turbine Building Clean Demolition                         1,640         206           16              191        (432)             15        282           1,919                                 1,919      17,769 2f.3     Control Building Area                                       511         822            0              200        {723)                       140              950                            949,761         5,538 2f.4     Emergency Diesel Generator                                  373          59            0               48        (172)              -         53              362                                   362      4,044 2f.5     Final Site Restoration                                                                                  -            -             15          8               23                                    23 Zf.6     Backfill Site                                             6,865       4,223                             -            -            176      1,944          13,208                               13,208       74,380 Zf.7     Cooling Tower Demolltion                                    452                        -                              -        11,492      2,062          14,005                               14,005        4,894 2fTotal Site Restoration                                                   10,041       5,457           17              492      (1,419)         11,713      4,545          30,845           -              -    30,845      108,799 Zg.1     SNF/GTCC Storage Facility Security & Operations           5,616                        -                -             -         4,884      1,326          11,826       8,870         2,957                  93,600 Zg.2     SNF/GTCC Transfer to DOE                                      -           -        1,530           1,584       36,680           3,120     12,874          55,788      41,841        13,947                     -

Zg.3 SNF/GTCC Storage Facility Decommission & Demolition - 5,616 1,530 1,584

                                                                                                                         -      36,680 2,400 10,404 480 14,680 2,880 70,494 1,728 52,438 576 17,479 576 576 93,600 Zg Total SNF/GTCC Storage & Transfer to DOE Zh.1     Rad Protection Program                                   15,916       9,519            .                 -            .         3,593      5,011          34,039      34,039                               204,057 Zh.2     Project Management & Engineering                         62,578           -            -                                        5,903     10,900          79,380      63,504                   15,876      560,010 2h.3     Environmental Program                                     1,139           -            .                              ..          726        322           2,186       1,749                        437     14,685 Zh.4     PDMS & Plant Security Services                                .                        .                 .                     11,160      1,926          13,086      10,469                      2,617 2h.5     ANl/NEIL/Other Insurance                                      -                        .                 .                      6,120      1,056           7,176       5,741                      1,435 Zh.6     Property Taxes & Fees                                         -                        -                 -            -            34         10               44         35                          9 Zh.7     Energy Costs                                                  -           -            -                 -            -         3,562        615           4,176       3,341                        835        -

Zh.8 Safety & Training Program - - . . 2,354 406 2,761 2,209 552 . 2h.9 NRC Fees - . . 6,503 1,123 7,626 7,626 - 2h Total Undistributed Indirect Costs 79,633 9,519 - - . 39,955 21,368 150,475 128,713 - 21,762 778,752 Phase 2 Total - Decommissioning & Ucense Termination 113,803 31,894 5,139 20,946 115,976 75,535 66,142 430,135 358,825 17,479 53,831 1,189,685 Grand Total 314,157m 119,IU 12,016 35,91111 27!1,705 430,377 269,A46 1,A62,1~ 1,325,700 82,lilil 53,831 3,048,647 Page 3 of 3

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev.O APPENDIX E E Annual Spending Table - DECON E Annual Spending Table - SAFSTORl E Annual Spending Table - SAFSTOR2

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev.a Appendix E-1 Scenario 1 - DECON Projected Annual Spending (thousands of 2018 dollars) Ucense Spent Site Year Total Termination Fuel Restoration 2018 - 2019 4,752 383 5,135 2020 6,045 480 6,525 2021 6,045 480 6,525 2022 11,m 5,525 17,302 2023 45,035 5,990 51,025 2024 101,096 14,598 115,694 2025 102,919 14,598 117,517 2026 154,270 14,598 168,868 2027 162,007 6,945 168,952 2028 166,315 1,481 167,796 2029 46,961 527 47,488 2030 49,454 527 49,981 2031 74,174 527 3,781 78,482 2032 52,982 527 17,770 71,279 2033 53,633 527 14,043 68,203 2034 35,181 527 13,596 49,304 2035 8,136 527 4,321 12,985 2036 1,573 527 - 2,100 2037 1,573 527 - 2,100 2038 1,573 527 - 2,100 2039 1,573 527 - 2,100 2040 1,573 527 - 2,100 2041 1,573 527 - 2,100 2042 1,573 527 - 2,100 2043 1,573 527 - 2,100 2044 1,573 527 - 2,100 2045 1,573 527 - 2,100 2046 1,573 527 - 2,100 2047 1,573 527 - 2,100 2048 1,573 527 - 2,100 2049 1,573 527 - 2,100 2050 1,573 527 - 2,100 2051 3,373 1,127 - 4,500 2052 21,493 7,220 - 28,713 2053 21,493 7,220 - 28,713 2054 1,728 576 576 2,880 1,152,465 92,815 54,088 1,299,368

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev.O Appendix E-2 Scenario 2 - SAFSTORl Projected Annual Spending (thousands of 2018 dollars) a License Spent Site Year Total Termination Fqel Restoration 2018 - 2019 3,481 3,481 2020 3,481 3,481 2021 3,481 3,481 2022 3,481 3,481 2023 3,481 3,481 2024 3,481 3,481 2025 3,481 3,481 2026 3,481 3,481 2027 3,481 3,481 2028 3,481 3,481 2029 3,481 3,481 2030 3,481 3,481 2031 3,481 3,481 2032 3,481 3,481 2033 3,481 3,481 2034 3,481 3,481 2035 3,481 3,481 2036 3,481 3,481 2037 4,752 383 5,135 2038 6,045 480 6,525 2039 6,045 480 6,525 2040 11,m 5,525 17,302 2041 45,035 5,990 51,025 2042 101,096 14,598 115,694 2043 102,919 14,598 117,517 2044 154,270 14,598 168,868 2045 162,007 6,945 168,952 2046 166,315 1,481 167,796 2047 46,961 432 47,393 2048 49,454 432 49,886 2049 74,174 432 4,345 78,951 2050 52,982 432 16,076 69,490 2051 53,633 1,032 15,105 69,no 2052 51,102 7,124 13,483 71,709 2053 25,532 7,124 4,320 36,976 2054 7,177 576 576 8,329 1,183,939 82,662 53,905 1,320,506

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev.O Appendix E-3 Scenario 3 - SAFSTORZ Projected Annual Spending (thousands of 2018 dollars) License Spent Site Year Total Termination Fuel Restoration 2018 - 2019 3,481

                                                            -                              3,481 2020                    3,481                                                    3,481 I

2021 3,481 3,481 2022 3,481 3,481 2023 3,481 3,481 2024 3,481 3,481 2025 3,481 3,481 2026 3,481 3,481 2027 3,481 3,481 2028 3,481 3,481 2029 3,481 3,481 2030 3,481 3,481 2031 3,481 3,481 2032 3,481 3,481 2033 3,481 3,481 2034 3,481 3,481 2035 3,481 3,481 2036 3,481 3,481 2037 3,481 3,481 2038 3,481 3,481 2039 3,481 3,481 2040 3.481 3,481 2041 3.481 3,481 2042 3,481 3,481 2043 3,481 3,481 2044 3,481 3,481 2045 3,481 3,481 2046 3,481 3,481 2047 3,481 3,481 2048 3,481 3,481 2049 3,481 3,481 2050 3,481 3,481 2051 3,481 3,481 2052 3,481 3,481 2053 3,481 3,481 2054 3,481 3,481 2055 3,481 3,481 2056 3,481 3,481 2057 3,481 3,481

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-Ol FirstEnergy Three Mile Island, Unit 2 Rev.O Appendix E-3 Scenario 3 - SAFSTOR2 Projected Annual Spending (thousands of 2018 dollars) License Spent Site Year Total Termination Fuel Restoration 2058 3,481 3,481 2059 3,481 3,481 2060 3,481 3,481 2061 3,481 3,481 2062 3,481 3,481 2063 3,481 3,481 2064 3,481 3,481 2065 3,481 3,481 2066 3,481 3,481 2067 3,481 3,481 2068 3,481 3,481 2069 3,481 3,481 2070 3,481 3,481 2071 3,481 3,481 2072 3,481 3,481 2073 3,481 3,481 2074 3,481 3,481 2075 3,481 3,481 2076 3,481 3,481 2on 3,481 3,481 2078 3,827 383 4,210 2079 6,045 480 6,525 2080 6,045 480 6,525 2081 11,n1 5,525 17,302 2082 45,035 5,990 51,025 2083 101,096 14,598 115,694 2084 102,919 14,598 117,517 2085 154,270 14,598 168,868 2086 162,007 6,945 168,952 2087 166,315 1,481 167,796 2088 46,961 432 47,393 2089 49,454 432 49,886 2090 74,174 432 4,306 78,912 2091 52,982 432 16,042 69,455 2092 53,633 1,032 15,073 69,737 2093 51,102 7,124 13,458 71,683 2094 25,532 7,124 4,3n 37,033 2095 1,1n 576 576 / 8,329 1,325,700 82,662 53,831 1,462,193

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev.O APPENDIXF F Annual Spending Comparison to Previous Estimates - DECON F Annual Spending Comparison to Previous Estimates - SAFSTORl F Annual Spending Comparison to Previous Estimates - SAFSTOR2

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev. O Appendix F-1 Scenario 1 - DECON Annual Spending Comparison to prior TLG Study {thousands of 2018 dollars) Year Current Cost Study

• nG Previous *** RG DECON Cost Variance between In 2018 dollars DECON Cost Study Study Escalated to current estimate &

In 2013 dollars 2018 dollars nG In 2018 dollars 2018 - see note** 2019 5,135 3,036 3,481 1,654 2020 6,525 3,044 3,490 3,035 2021 6,525 3,036 3,481 3,044 2022 17,302 3,036 3,481 13,821 2023 51,025 53,427 61,260 (10,235) 2024 115,694 88,337 101,288 14,406 2025 117,517 110,929 127,192 (9,675) 2026 168,868 110,929 127,192 41,675 2027 168,952 111,233 127,541 41,411 2028 167,796 110,929 127,192 40,603 2029 47,488 97,858 112,205 (64,717) 2030 49,981 73,063 83,775 (33,793) 2031 78,482 73,263 84,004 (5,522) 2032 71,279 73,063 83,775 (12,496) 2033 68,203 78,671 90,205 (22,002) 2034 49,304 70,671 81,032 (31,728) 2035 12,985 31,354 35,951 (22,966) 2036 2,100 3,044 3,490 (1,390) 2037 2,100 3,036 3,481 (1,381) 2038 2,100 3,036 3,481 (1,381) 2039 2,100 3,036 3,481 (1,381) 2040 2,100 3,044 3,490 (1,390) 2041 2,100 3,036 3,481 (1,381) 2042 2,100 3,036 3,481 (1,381) 2043 2,100 3,036 3,481 (1,381) 2044 2,100 3,044 3,490 (1,390) 2045 2,100 3,036 3,481 (1,381) 2046 2,100 3,036 3,481 (1,381) 2047 2,100 3,036 3,481 (1,381) 2048 2,100 3,044 3,490 (1,390) 2049 2,100 3,036 3,481 (1,381) 2050 2,100 3,036 3,481 (1,381) 2051 4,500 3,036 3,481 1,019 2052 28,713 14,209 16,292 12,421 2053 28,713 14,209 16,292 12,421 2054 2,880 - - 2,880 1,299,368 1,172,905 1,344,866 (45,499)

• from TLG DECOMMISSIONING COST ANALYSIS, December 2014

      **years 2013 -2018 not included with TLG previous costs
      *** from TLG ESCALATION ANALYSIS, February 201S

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-Ol FirstEnergy Three Mile Island, Unit 2 Rev.O Appendix F-2 Scenario 2 - SAFSTOR1 Annual Spending Comparison to prior TLG DELAYED DECON Study (thousands of 2018 dollars) Year Current Cost Study

• TI.G Previous *** TI.G DElAYED Variance between In 2018 dollars DElAYED DECON Cost DECON Cost Study current estimate &

Study (2013 dollan) Escalated to 2018 TI.G In 2018 dollars dollars 2018 see note** 2019 3,481 3,036 3,481 0 2020 3,481 3,044 3,490 (9) 2021 3,481 3,036 3,481 0 2022 3,481 3,036 3,481 0 2023 3,481 3,036 3,481 0 2024 3,481 3,044 3,490 (9) 2025 3,481 3,036 3,481 0 2026 3,481 3,036 3,481 0 2027 3,481 3,036 3,481 0 2028 3,481 3,044 3,490 (9) 2029 3,481 3,036 3,481 0 2030 3,481 3,036 3,481 0 2031 3,481 3,036 3,481 0 2032 3,481 3,044 3,490 (9) 2033 3,481 3,036 3,481 0 2034 3,481 2,112 2,422 1,060 2035 3,481 1,724 1,977 1,505 2036 3,481 1,728 1,981 1,500 2037 5,135 1,724 1,977 3,158 2038 6,525 1,724 1,977 4,548 2039 6,525 1,724 1,977 4,548 2040 17,302 1,728 1,981 15,321 2041 51,025 1,724 1,977 49,048 2042 115,694 1,724 1,977 113,717 2043 117,517 1,724 1,977 115,540 2044 168,868 1,728 1,981 166,886 2045 168,952 27,776 31,848 137,104 2046 167,796 79,404 91,046 76,750 2047 47,393 107,381 123,124 (75,731) 2048 , 49,886 111,194 127,496 (77,610) 2049 78,951 110,890 127,148 (48,197) 2050 69,490 110,890 127,148 (57,658) 2051 69,770 110,890 127,148 (57,378) 2052 71,709 71,322 81,779 (10,070) 2053 36,976 71,128 81,556 (44,581)

             '2054                       8,329                     71,128              81,556                (73,227) 2055                                                 71,128              81,556                (81,556) 2056                                                 71,322              81,779                (81,779) 2057                                                 39,461              45,246                (45,246) 2058                                                 38,859              44,556                (44,556) 2059                                                  1,619               1,856                 (1,856 1,320,506                  1,159,328           1,329,299                 (8,793)
          *from TlG DECOMMISSIONING COST ANALYSIS, December 2014
          **years 2013 *2018 not included with TLG previous costs
          ***from nG ESCALATION ANALYSIS, February 2015

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev. O Appendix F-3 Scenario 3 - SAFSTOR2 Annual Spending Comparison to prior TLG Study (thousands of 2018 dollars) Vear Current Cost Study

• nG Previous ** RG SAFSTOR Cost Variance between (2018 dollars) SAFSTE>R Cost Study Study Escalated to current estimate &

(2013 dollars) 2018 dollars RG In 2018 dollars 2018 - see note** 2019 3,481 3,036 3,481 (1) 2020 3,481 3,044 3,490 (10) 2021 3,481 3,036 3,481 (1) 2022 3,481 3,036 3,481 (1) 2023 3,481 3,036 3,481 (1) 2024 3,481 3,044 3,490 (10) 2025 3,481 3,036 3,481 (1) 2026 3,481 3,036 3,481 (1) 2027 3,481 3,036 3,481 (1) 2028 3,481 3,044 3,490 (10) 2029 3,481 3,036 3,481 (1) 2030 3,481 3,036 3,481 (1) 2031 3,481 3,036 3,481 (1) 2032 3,481 3,044 3,490 (10) 2033 3,481 3,036 3,481 (1) 2034 3,481 2,107 2,416 1,065 2035 3,481 1,716 1,968 1,513 2036 3,481 1,721 1,973 1,507 2037 3,481 1,716 1,968 1,513 2038 3,481 1,716 1,968 1,513 2039 3,481 1,716 1,968 1,513 2040 3,481 1,721 1,973 1,507 2041 3,481 1,716 1,968 1,513 2042 3,481 1,716 1,968 1,513 2043 3,481 1,716 1,968 1,513 2044 3,481 1,721 1,973 1,507 2045 3,481 1,716 1,968 1,513 2046 3,481 1,716 1,968 1,513 2047 3,481 1,716 1,968 1,513 2048 3,481 1,721 1,973 1,507 2049 3,481 1,716 1,968 1,513 2050 3,481 1,716 1,968 1,513 2051 3,481 1,716 1,968 1,513 2052 3,481 1,721 1,973 1,507 2053 3,481 1,716 1,968 1,513 2054 3,481 1,716 1,968 1,513 2055 3,481 1,716 1,968 1,513 2056 3,481 1,721 1,973 1,507 2057 3,481 1,716 1,968 1,513 2058 3,481 1,716 1,968 1,513

2018 Decommissioning Cost Estimate for Document No. 164059-DCE-01 FirstEnergy Three Mile Island, Unit 2 Rev.O Appendix F-3 Scenario 3 - SAFSTOR2 Annual Spending Comparison to prior nG Study (thousands of 2018 dollars) Year Current Cost Study

• TI.G Previous ** TI.G SAFSTOR Cost Variance between (2018 dollars) SAFSTOR Cost Study Study Escalated to current estimate &

II (2013 dollars) 2018 dollars TI.G In 2018 dollars 2059 3,481 1,716 1,968 1,513 2060 3,481 1,721 1,973 1,507 2061 3,481 1,716 1,968 1,513 2062 3,481 1,716 1,968 1,513 2063 3,481 1,716 1,968 1,513 2064 3,481 1,721 1,973 1,507 2065 3,481 1,716 1,968 1,513 2066 3,481 1,716 1,968 1,513 2067 3,481 1,716 1,968 1,513 2068 3,481 1,721 1,973 1,507 2069 3,481 1,716 1,968 1,513 2070 3,481 1,716 1,968 1,513 2071 3,481 1,716 1,968 1,513 2072 3,481 1,721 1,973 1,507 2073 3,481 1,716 1,968 1,513 2074 3,481 1,716 1,968 1,513 2075 3,481 1,716 1,968 1,513 2076 3,481 1,721 1,973 1,507 2077 3,481 1,716 1,968 1,513 2078 4,210 1,716 1,968 2,243 2079 6,525 1,716 1,968 4,557 2080 6,525 1,721 1,973 4,552 2081 17,302 8,330 9,551 7,751 2082 51,025 76,021 87,167 (36,141) 2083 115,694 101,178 116,012 (318) 2084 117,517 111,171 127,470 (9,953) 2085 168,868 110,867 127,121 41,746 2086 168,952 110,867 127,121 41,831 2087 167,796 110,867 127,121 40,675 2088 47,393 81,802 93,795 (46,402) 2089 49,886 71,017 81,429 (31,543) 2090 78,912 71,017 81,429 (2,516) 2091 69,455 71,017 81,429 (11,974) 2092 69,737 71,211 81,651 (11,914) 2093 71,683 51,259 58,774 12,909 2094 37,033 35,434 40,629 (3,597) 2095 8,329 12,086 13,858 (5,529] 1,462,193 1,220,819 1,399,805 62,388

     *from TLG DECOMMISSIONING COST ANALYSIS, December 2014
     **years 2013 -2018 not included with TLG previous costs
     ***from TLG ESCALATION ANALYSIS, February 2015}}