Text

Report on Status of Decommissioning Funding for Reactors
	ML13092A156
Person / Time
Site:	Dresden, Peach Bottom, Salem, Oyster Creek, Byron, Braidwood, Limerick, Clinton, Quad Cities, LaSalle, Crane
Issue date:	04/01/2013
From:	Simpson P; Exelon Generation Co
To:	; Document Control Desk, NRC/FSME, Office of Nuclear Reactor Regulation
References
	RS-13-100
	Download: ML13092A156 (62)
	v • d • e

4300 Winfield Road Warrenville, IL 60955 Exeton Generation..

RS-13-100 10 CFR 50.75(0(1)

April 1, 2013 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Braidwood Station, Units 1 and 2 Facility Operating License Nos. NPF-72 and NPF-77 NRC Docket Nos. STN 50-456 and STN 50-457 Byron Station, Units 1 and 2 Facility Operating License Nos. NPF-37 and NPF-66 NRC Docket Nos. STN 50-454 and STN 50-455 Clinton Power Station Facility Operating License No. NPF-62 NRC Docket No. 50-461 Dresden Nuclear Power Station, Units 1, 2 and 3 Facility Operating License No. DPR-2 Renewed Facility Operating License Nos. DPR-1 9 and DPR-25 NRC Docket Nos. 50-10.50-237 and 50-249 LaSalle County Station, Units 1 and 2 Facility Operating License Nos. NPF -11 and NPF-18 NRC Docket Nos. 50-373 and 50-374 Limerick Generating Station, Units 1 and 2 Facility Operating License Nos. NPF-39 and NPF-85 NRC Docket Nos. 50-352 and 50-353 Oyster Creek Nuclear Generating Station Renewed Facility Operating License No. DPR-16 NRC Docket No. 50-219 Peach Bottom Atomic Power Station, Units 1, 2, and 3 Facility Operating License No. DPR-12 Renewed Facility Operating License Nos. DPR -44 and DPR-56 NRC Docket Nos. 50-171, 50-277, and 50-278 630 657 2000 Office

April 1, 2013 U. S. Nuclear Regulatory Commission Page 2 Quad Cities Nuclear Power Station, Units 1 and 2 Renewed Facility Operating License Nos. DPR-29 and DPR-30 NRC Docket Nos. 50-254 and 50-265 Salem Generating Station, Units 1 and 2 Renewed Facility Operating License Nos. DPR-70 and DPR-75 NRC Docket Nos. 50-272 and 50-311 Three Mile Island Nuclear Station, Unit 1 Renewed Facility Operating License No. DPR-50 NRC Docket No. 50-289

Subject:

2013 Report on Status of Decommissioning Funding for Reactors

References:

1. Letter from Patrick R. Simpson (Exelon Generation Company, LLC) to U. S. NRC, "Response to Request for Additional Information Regarding Status of Decommissioning Funding Assurance," dated May 21, 2012

2. Letter from Patrick R. Simpson (Exelon Generation Company, LLC) to U. S. NRC, "Amended Nuclear Decommissioning Trust Agreements,"

dated January 15, 2013

3. Letter from Patrick R. Simpson (Exelon Generation Company, LLC) to U. S. NRC, "Standby Trust Agreement," dated November 16, 2012 In accordance with 10 CFR 50.75, "Reporting and recordkeeping for decommissioning planning," paragraph (f)(1), Exelon Generation Company, LLC (EGC) is submitting a report on the status of decommissioning funding for the reactors owned by EGG.

In accordance with 10 CFR 50.75(b)(4), 50.75(c), and 50.75(f)(2), the estimated cost of decommissioning for financial assurance is based on either the NRC formula cost amount calculated in accordance with 10 CFR 50.75(c) or site-specific decommissioning cost estimates. If used in this report, the site-specific decommissioning cost estimates are based on a period of safe storage that is specifically described in the estimates. Site-specific cash flows from the site-specific cost estimates are included, as applicable. Unless otherwise noted, the cash flow analysis for the site-specific decommissioning cost estimates conservatively assumes all expenses in a year are incurred at the beginning of year (i.e., beginning of year convention) during the decommissioning period. The cash flow analysis for Peach Bottom Atomic Power Station, Unit 1, assumes that half of the current year contributions are included in the current year earnings to estimate payment of contributions throughout the year (i.e, a mid-year convention). EGC uses a mid-year convention in this instance because the contributions are made monthly at a constant rate throughout the year.

April 1, 2013 U. S. Nuclear Regulatory Commission Page 3 For shutdown units, the reporting requirements of 10 CFR 50.82, "Termination of license,"

paragraph (a)(8)(v) and (a)(8)(vii) are also included in this report.

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

As described in Reference 1, Exelon Corporation has established a parent company guarantee to provide additional decommissioning funding assurance for Limerick Generating Station, Unit 1. An updated financial test in accordance with 10 CFR 30, "Rules of General Applicability to Domestic Licensing of Byproduct Material," Appendix A, "Criteria Relating to Use of Financial Tests and Parent Company Guarantees for Providing Reasonable Assurance of Funds for Decommissioning,"Section II, "Financial Tests," paragraph A and C, based on December 31, 2012, data is included in Attachment 23. In accordance with 10 CFR 30, Appendix A, paragraph B, Attachment 24 provides the required audit report in support of the updated financial test, and Attachment 25 provides additional information, from Exelon Corporation, regarding the parent company guarantee. There is no change to the value of the parent company guarantee, and there are no parent company guarantees established for any other units.

There were no disbursements from these trust funds other than those for allowed administrative costs and other incidental expenses of the fund in connection with the operation of the fund in accordance with 10 CFR 50.75(h)(1)(iv).

There are no regulatory commitments contained within this letter. If you have any questions about this letter, please contact Mr. Thomas J. Griffith at (630) 657-2823.

Patrick R. Simpson Manager - Licensing cc:

Regional Administrator - NRC Region I Regional Administrator - NRC Region III NRC Senior Resident Inspector - Braidwood Station NRC Senior Resident Inspector - Byron Station NRC Senior Resident Inspector - Clinton Power Station NRC Senior Resident Inspector - Dresden Nuclear Power Station NRC Senior Resident Inspector - LaSalle County Station NRC Senior Resident Inspector - Limerick Generating Station NRC Senior Resident Inspector - Oyster Creek Nuclear Generating Station NRC Senior Resident Inspector - Peach Bottom Atomic Power Station NRC Senior Resident Inspector - Quad Cities Nuclear Power Station

April 1, 2013 U. S. Nuclear Regulatory Commission Page 4 cc:

(continued)

NRC Senior Resident Inspector - Salem NRC Senior Resident Inspector - Three Mile Island Nuclear Station, Unit 1 Attachments:

1.

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

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

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

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

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

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

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

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

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

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

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

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

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

14. Annual Radiological Decommissioning Funding Assurance Report for Oyster Creek Nuclear Generating Station

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

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

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

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

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

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

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

22. Annual Radiological Decommissioning Funding Assurance Report for Three Mile Island Nuclear Station, Unit 1

April 1, 2013 U. S. Nuclear Regulatory Commission Page 5

23. Parent Company Guarantee Financial Test for Limerick Generating Station, Unit 1

24. 10 CFR 30, Appendix A, Required Independent Auditor's Report for Parent Company Guarantee

25. Additional Information Regarding Parent Company Guarantee

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

The labor, energy, and burial indices used are consistent with those described in NUREG-1307, "Report on Waste Burial Charges: Changes in Decommissioning Waste Disposal Costs at Low-Level Waste Burial Facilities," Revision 15, published January 2013.

The current labor cost indices used are obtained from the "Employment Cost Indexes,"

published by the U.S. Department of Labor, Bureau of Labor Statistics (BLS).

Specifically, EGC used the Employment Cost Index for total compensation for private industry workers by region. The labor adjustment factors were calculated according to Section 3.1 of NUREG-1307, Revision 15, using fourth quarter 2012 data. Table 1 shows the data used for this calculation.

Table 1: Labor Adjustment Factors 402012 Base Labor Index L,s Adjustment Region Applicable Sites Series ID Number Factor LX Limerick Oyster Creek Northeast Peach Bottom CIU20100000002101 117.9 2.16 2.547 Salem TMI Braidwood Byron Midwest Clinton Dresden CIU20100000002301 115.9 2.08 2.411 LaSalle Quad Cities The current energy cost indices used are obtained from Producer Price Indexes (PPI) -

Commodities, published by the U.S. Department of Labor, BLS. Specifically, EGC used the PPI for industrial electric power (WPU0543) and light fuel oils (WPU0573). The energy adjustment factors were calculated according to Section 3.2 of NUREG-1 307, Revision 15, using December 2012 data. Table 2 shows the data used for this calculation.

Table 2: Ener Adjustment Factors WPU0543 - January 1986 (base value) 114.2 WPU0573 - Janua 1986 (base value) 82.0 WPU0543 - December 2012 relimina value) 213.0 WPU0573 - December 2012 relimina value) 302.6 Industrial electric power adjustment factor - P, 1.865 Light fuel oil adjustment factor - FX 3.690 Energy Adjustment Factor PWR - EX PWR 2.632 Energy Adjustment Factor BW R - EX BW R 2.705 Page 1 of 2

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

The waste burial adjustment factors used are taken from Table 2-1 of NUREG-1 307, Revision 15, based on 2012 data. The adjustment factors EGC used assume a combination of compact-aff iliated and non-compact facilities, consistent with current waste disposal practices at EGC and consistent with typical waste disposal practices during decommissioning. Table 3 summarizes the data used for the calculation of the waste adjustment factors.

Table 3: Waste Adjustment Factors Combination of Compact-Affiliated and Reactor Applicable Non-Compact LLW Burial Site Type Site Facility Waste Adjustment Factor BX South Carolina site BWR Oyster Creek 14.160 Atlantic Compact South Carolina site PWR Salem 13.885 Atlantic Compact Clinton Dresden Generic LLW BWR LaSalle 14 160 Disposal Site Limerick Peach Bottom Quad Cities Generic LLW Braidwood Disposal Site PWR Byron 13.885 TMI The calculation methodology used for all adjustment factors is consistent with NUREG-1307, Revision 15.

Page 2of2

ATTACHMENT 2 Annual Radiological Decommissioning Funding Assurance Report for Braidwood Station, Unit 1 December 31, 2012 (Thousands of Dollars) 1 Formula cost amount per 10 CFR 50.75(c)

$ 521,198 2

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

$ 640,480 (a) 3 The amount of decommissioning trust funds accumulated as of December 31, 2012

$ 256,580 (b) 4 Schedule of the annual amounts remaining to be collected.

$0 5

Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (c) 6 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

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

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

(a) This is based on the SAFSTOR scenario from the site-specific cost estimate, and is greater than the formula cost amount under 10 CFR 50.75(c), as required by 10 CFR 50.75(b)(1). The site-specific estimate has been previously provided in a letter from Patrick R. Simpson (EGC) to U.S.NRC, dated January 11, 2010 (TLG Report E16-1555-014, Revision 0, "Decommissioning Cost Analysis for the Braidwood Nuclear Power Station," October 2009). The costs have been escalated from the 2009 dollars in the decommissioning cost estimate to December 31, 2012.

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

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

(d) For purposes of this report, permanent termination of operations (shutdown) is expected on October 17, 2026.

Page 1 of 3

ATTACHMENT 2 Annual Radiological Decommissioning Funding Assurance Report for Braidwood Station, Unit 1 December 31, 2012 (Thousands of Dollars)

BOY BOY EOY Trust Trust Fund Trust Trust Fund Value Fund Fund Value Less Cost Earnings Value

$336,880

$326,640

$1,633

$328,273

$272,695

$5,454

$278,149

$264,737

$5,295

$270,031

$266,132

$5,323

$271,455

$267,555

$5,351

$272,907

$269,007

$5,380

$274,387

$270,481

$5,410

$275,891

$271,996

$5,440

$277,436

$273,542

$5,471

$279,013

$275,119

$5,502

$280,621

$276,716

$5,534

$282,250

$278,356

$5,567

$283,923

$280,029

$5,601

$285,629

$281,735

$5,635

$287,370

$283,465

$5,669

$289,134

$285,240

$5,705

$290,945

$287,050

$5,741

$292,791

$288,897

$5,778

$294,675

$290,770

$5,815

$296,586

$292,691

$5,854

$298,545

$294,676

$5,894

$300,570

$296,701

$5,934

$302,635

$298,756

$5,975

$304,731

$300,862

$6,017

$306,879

$303,010

$6,060

$309,071

$305,202

$6,104

$311,306

$307,426

$6,149

$313,575

$309,706

$6,194

$315,900

$312,031

$6,241

$318,272

$314,403

$6,288

$320,691

$316,812

$6,336

$323,148

$319,279

$6,386

$325,665

$321,796

$6,436

$328,232

$324,363

$6,487

$330,851

$326,971

$6,539

$333,511

$329,642

$6,593

$336,235

$332,366

$6,647

$339,013

$335,144

$6,703

$341,847

$337,968

$6,759

$344,727

$340,858

$6,817

$347,675 Page 2 of 3 Radiological Decommissioning Year Cost*

2026

$10,240 2027

$55,578 2028

$13,412 2029

$3,899 2030

$3,899 2031

$3,899 2032

$3,906 2033

$3,894 2034

$3,894 2035

$3,894 2036

$3,905 2037

$3,894 2038

$3,894 2039

$3,894 2040

$3,905 2041

$3,894 2042

$3,894 2043

$3,894 2044

$3,905 2045

$3,894 2046

$3,869 2047

$3,869 2048

$3,879 2049

$3,869 2050

$3,869 2051

$3,869 2052

$3,879 2053

$3,869 2054

$3,869 2055

$3,869 2056

$3,879 2057

$3,869 2058

$3,869 2059

$3,869 2060

$3,879 2061

$3,869 2062

$3,869 2063

$3,869 2064

$3,879 2065

$3,869

ATTACHMENT 2 Annual Radiological Decommissioning Funding Assurance Report for Braidwood Station, Unit 1 December 31, 2012 (Thousands of Dollars)

BOY BOY EOY Trust Trust Fund Trust Trust Fund Value Fund Fund Value Less Cost Earnings Value

$347,675

$343,807

$6,876

$350,683

$346,814

$6,936

$353,750

$349,871

$6,997

$356,868

$352,999

$7,060

$360,059

$356,191

$7,124

$363,314

$359,446

$7,189

$366,635

$362,755

$7,255

$370,010

$366,141

$7,323

$373,464

$369,595

$7,392

$376,987

$373,119

$7,462

$380,581

$376,701

$7,534

$384,236

$380,367

$7,607

$387,974

$384,105

$7,682

$391,787

$377,099

$7,542

$384,641

$330,282

$6,606

$336,887

$230,871

$4,617

$235,488

$150,640

$3,013

$153,653

$108,126

$2,163

$110,289

$74,578

$1,492

$76,070

$73,741

$1,475

$75,216

$51,669

$1,033

$52,703

$52,611

$1,052

$53,664

$53,572

$1,071

$54,644

$54,619

$1,092

$55,711

Column may not add due to rounding Radiological Decommissioning Year Cost*

2066

$3,869 2067

$3,869 2068

$3,879 2069

$3,869 2070

$3,869 2071

$3,869 2072

$3,879 2073

$3,869 2074

$3,869 2075

$3,869 2076

$3,879 2077

$3,869 2078

$3,869 2079

$14,688 2080

$54,359 2081

$106,017 2082

$84,848 2083

$45,527 2084

$35,710 2085

$2,329 2086

$23,546 2087

$91 2088

$92 2089

$25 Total

$640,480 Page 3 of 3

ATTACHMENT 3 Annual Radiological Decommissioning Funding Assurance Report for Braidwood Station, Unit 2 December 31, 2012 (Thousands of Dollars) 1 Formula cost amount per 10 CFR 50.75(c)

$521,198 2

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

$699,929 (a) 3 The amount of decommissioning trust funds accumulated as of December 31, 2012

$281,456 (b) 4 Schedule of the annual amounts remaining to be collected.

$0 5

Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (c) 6 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

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

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

(a) This is based on the SAFSTOR scenario from the site-specific cost estimate, and is greater than the formula cost amount under 10 CFR 50.75(c), as required by 10 CFR 50.75(b)(1). The site-specific estimate has been previously provided in a letter from Patrick R. Simpson (EGC) to U.S.NRC, dated January 11, 2010 (TLG Report E16-1555-014, Revision 0, "Decommissioning Cost Analysis for the Braidwood Nuclear Power Station," October 2009). The costs have been escalated from the 2009 dollars in the decommissioning cost estimate to December 31, 2012.

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

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

(d) For purposes of this report, permanent termination of operations (shutdown) is expected on December 18, 2027.

Page 1 of 3

ATTACHMENT 3 Annual Radiological Decommissioning Funding Assurance Report for Braidwood Station, Unit 2 December 31, 2012 (Thousands of Dollars)

BOY BOY EOY Trust Trust Fund Trust Trust Fund Value Fund Fund Value Less Cost Earnings Value

$378,178

$376,139

$627

$376,766

$321,597

$6,432

$328,029

$283,110

$5,662

$288,772

$284,857

$5,697

$290,555

$286,640

$5,733

$292,373

$288,447

$5,769

$294,216

$290,306

$5,806

$296,112

$292,206

$5,844

$298,051

$294,145

$5,883

$300,028

$296,111

$5,922

$302,033

$298,127

$5,963

$304,090

$300,184

$6,004

$306,187

$302,281

$6,046

$308,327

$304,410

$6,088

$310,499

$306,593

$6,132

$312,724

$308,819

$6,176

$314,995

$311,089

$6,222

$317,311

$313,394

$6,268

$319,662

$315,756

$6,315

$322,071

$318,178

$6,364

$324,542

$320,649

$6,413

$327,062

$323,159

$6,463

$329,622

$325,729

$6,515

$332,244

$328,351

$6,567

$334,918

$331,025

$6,621

$337,646

$333,742

$6,675

$340,417

$336,525

$6,730

$343,255

$339,362

$6,787

$346,150

$342,257

$6,845

$349,102

$345,199

$6,904

$352,103

$348,210

$6,964

$355,174

$351,281

$7,026

$358,307

$354,414

$7,088

$361,502

$357,599

$7,152

$364,751

$360,858

$7,217

$368,076

$364,183

$7,284

$371,466

$367,574

$7,351

$374,925

$371,022

$7,420

$378,442

$374,549

$7,491

$382,040

$378,148

$7,563

$385,711 Page 2of3 Radiological Decommissioning Year Cost*

2027

$2,039 2028

$55,168 2029

$44,919 2030

$3,915 2031

$3,915 2032

$3,925 2033

$3,910 2034

$3,906 2035

$3,906 2036

$3,917 2037

$3,906 2038

$3,906 2039

$3,906 2040

$3,917 2041

$3,906 2042

$3,906 2043

$3,906 2044

$3,917 2045

$3,906 2046

$3,893 2047

$3,893 2048

$3,903 2049

$3,893 2050

$3,893 2051

$3,893 2052

$3,903 2053

$3,893 2054

$3,893 2055

$3,893 2056

$3,903 2057

$3,893 2058

$3,893 2059

$3,893 2060

$3,903 2061

$3,893 2062

$3,893 2063

$3,893 2064

$3,903 2065

$3,893 2066

$3,893

ATTACHMENT 3 Annual Radiological Decommissioning Funding Assurance Report for Braidwood Station, Unit 2 December 31, 2012 (Thousands of Dollars)

BOY BOY EOY Trust Trust Fund Trust Trust Fund Value Fund Fund Value Less Cost Earnings Value

$385,711

$381,818

$7,636

$389,454

$385,551

$7,711

$393,262

$389,369

$7,787

$397,157

$393,264

$7,865

$401,129

$397,236

$7,945

$405,181

$401,278

$8,026

$409,303

$405,411

$8,108

$413,519

$409,626

$8,193

$417,819

$413,926

$8,279

$422,204

$418,301

$8,366

$426,667

$422,774

$8,455

$431,230

$427,337

$8,547

$435,884

$431,991

$8,640

$440,631

$423,093

$8,462

$431,555

$391,735

$7,835

$399,569

$293,993

$5,880

$299,873

$220,332

$4,407

$224,739

$158,908

$3,178

$162,086

$96,435

$1,929

$98,363

$69,614

$1,392

$71,006

$70,967

$1,419

$72,387

$72,347

$1,447

$73,794

$73,784

$1,476

$75,260

Column may not add due to rounding Radiological Decommissioning Year Cost*

2067

$3,893 2068

$3,903 2069

$3,893 2070

$3,893 2071

$3,893 2072

$3,903 2073

$3,893 2074

$3,893 2075

$3,893 2076

$3,903 2077

$3,893 2078

$3,893 2079

$3,893 2080

$17,538 2081

$39,820 2082

$105,576 2083

$79,540 2084

$65,831 2085

$65,651 2086

$28,749 2087

$39 2088

$39 2089

$10 Total

$699,929 Page 3 of 3

ATTACHMENT 4 Annual Radiological Decommissioning Funding Assurance Report for Byron Station, Unit 1 December 31, 2012 (Thousands of Dollars) 1 Formula cost amount per 10 CFR 50.75(c)

$521,198 2

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

$628,047 (a) 3 The amount of decommissioning trust funds accumulated as of December 31, 2012

$285,574 (b) 4 Schedule of the annual amounts remaining to be collected.

$0 5

Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (c) 6 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

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

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

(a) This is based on the SAFSTOR scenario from the site-specific cost estimate, and is greater than the formula cost amount under 10 CFR 50.75(c), as required by 10 CFR 50.75(b)(1). The site-specific estimate has been previously provided in a letter from Patrick R. Simpson (EGC) to U.S.NRC, dated November 16, 2009 (TLG Report E16 -

1555-013, Revision 0, "Decommissioning Cost Analysis for the Byron Nuclear Power Station," September 2009). The costs have been escalated from the 2009 dollars in the decommissioning cost estimate to December 31, 2012.

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

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

(d) For purposes of this report, permanent termination of operations (shutdown) is expected on October 31, 2024.

Page 1 of 3

ATTACHMENT 4 Annual Radiological Decommissioning Funding Assurance Report for Byron Station, Unit 1 December 31, 2012 (Thousands of Dollars)

BOY BOY EOY Trust Trust Fund Trust Trust Fund Value Fund Fund Value Less Cost Earnings Value

$360,389

$352,128

$1,761

$353,888

$299,360

$5,987

$305,347

$287,297

$5,746

$293,043

$290,143

$5,803

$295,946

$293,039

$5,861

$298,900

$296,000

$5,920

$301,920

$298,374

$5,967

$304,341

$300,477

$6,010

$306,487

$302,613

$6,052

$308,665

$304,801

$6,096

$310,897

$307,034

$6,141

$313,174

$309,311

$6,186

$315,497

$311,623

$6,232

$317,855

$313,992

$6,280

$320,271

$316,408

$6,328

$322,736

$318,872

$6,377

$325,250

$321,375

$6,428

$327,803

$323,939

$6,479

$330,418

$326,555

$6,531

$333,086

$329,247

$6,585

$335,832

$331,983

$6,640

$338,622

$334,784

$6,696

$341,479

$337,641

$6,753

$344,393

$340,555

$6,811

$347,366

$343,517

$6,870

$350,387

$346,548

$6,931

$353,479

$349,641

$6,993

$356,633

$352,795

$7,056

$359,851

$356,001

$7,120

$363,121

$359,283

$7,186

$366,468

$362,630

$7,253

$369,882

$366,044

$7,321

$373,365

$369,515

$7,390

$376,906

$373,067

$7,461

$380,528

$376,690

$7,534

$384,223

$380,385

$7,608

$387,992

$384,143

$7,683

$391,826

$387,987

$7,760

$395,747

$391,908

$7,838

$399,747

$395,908

$7,918

$403,826 Page 2of3 Radiological Decommissioning Year Cost*

2024

$8,261 2025

$54,528 2026

$18,050 2027

$2,899 2028

$2,907 2029

$2,899 2030

$3,547 2031

$3,864 2032

$3,874 2033

$3,864 2034

$3,864 2035

$3,864 2036

$3,874 2037

$3,864 2038

$3,864 2039

$3,864 2040

$3,874 2041

$3,864 2042

$3,864 2043

$3,839 2044

$3,849 2045

$3,839 2046

$3,839 2047

$3,839 2048

$3,849 2049

$3,839 2050

$3,839 2051

$3,839 2052

$3,849 2053

$3,839 2054

$3,839 2055

$3,839 2056

$3,849 2057

$3,839 2058

$3,839 2059

$3,839 2060

$3,849 2061

$3,839 2062

$3,839 2063

$3,839

ATTACHMENT 4 Annual Radiological Decommissioning Funding Assurance Report for Byron Station, Unit 1 December 31, 2012 (Thousands of Dollars)

BOY BOY EOY Trust Trust Fund Trust Trust Fund Value Fund Fund Value Less Cost Earnings Value

$403,826

$399,977

$8,000

$407,976

$404,138

$8,083

$412,221

$408,382

$8,168

$416,550

$412,711

$8,254

$420,965

$417,116

$8,342

$425,458

$421,619

$8,432

$430,052

$426,213

$8,524

$434,737

$430,899

$8,618

$439,517

$435,668

$8,713

$444,381

$440,542

$8,811

$449,353

$445,514

$8,910

$454,425

$450,586

$9,012

$459,598

$455,749

$9,115

$464,863

$453,380

$9,068

$462,448

$410,628

$8,213

$418,840

$318,291

$6,366

$324,657

$237,507

$4,750

$242,257

$198,100

$3,962

$202,062

$164,323

$3,286

$167,610

$165,285

$3,306

$168,591

$146,075

$2,922

$148,997

$148,906

$2,978

$151,884

$151,793

$3,036

$154,828

$154,800

$3,096

$157,896

Column may not add due to rounding Radiological Decommissioning Year Cost*

2064

$3,849 2065

$3,839 2066

$3,839 2067

$3,839 2068

$3,849 2069

$3,839 2070

$3,839 2071

$3,839 2072

$3,849 2073

$3,839 2074

$3,839 2075

$3,839 2076

$3,849 2077

$11,483 2078

$51,820 2079

$100,549 2080

$87,150 2081

$44,157 2082

$37,739 2083

$2,324 2084

$22,516 2085

$91 2086

$91 2087

$28 Total

$628,047 Page 3 of 3

ATTACHMENT 5 Annual Radiological Decommissioning Funding Assurance Report for Byron Station, Unit 2 December 31, 2012 (Thousands of Dollars) 1 Formula cost amount per 10 CFR 50.75(c)

$521,198 2

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

$682,306 (a) 3 The amount of decommissioning trust funds accumulated as of December 31, 2012

$276,358 (b) 4 Schedule of the annual amounts remaining to be collected.

$0 5

Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (c) 6 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1 )(v).

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

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

(a) This is based on the SAFSTOR scenario from the site-specific cost estimate, and is greater than the formula cost amount under 10 CFR 50.75(c), as required by 10 CFR 50.75(b)(1). The site-specific estimate has been previously provided in a letter from Patrick R. Simpson (EGC) to U.S.NRC, dated November 16, 2009 (TLG Report E16-1555-013, Revision 0, "Decommissioning Cost Analysis for the Byron Nuclear Power Station," September 2009). The costs have been escalated from the 2009 dollars in the decommissioning cost estimate to December 31, 2012.

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

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

(d) For purposes of this report, permanent termination of operations (shutdown) is expected on November 6, 2026.

Page 1 of 3

ATTACHMENT 5 Annual Radiological Decommissioning Funding Assurance Report for Byron Station, Unit 2 December 31, 2012 (Thousands of Dollars)

Year 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 Radiological Decommissioning Cost*

$ 8,083

$ 59,827

$ 35,824

$ 3,804

$ 3,814

$ 3,804

$ 3,804 3,814

$ 3,804

$ 3,814

$ 3,804 3,827 3,827 3,827 3,831 3,817 3,817 3,817 3,827 3,817 3,817 3,817 3,827 3,817 3,817 3,804 3,814 3,804 3,804 3,804 3,814 3,804 3,804 3,804 3,814 BOY Trust Fund Value

$363,447

$356,549

$302,656

$272,168

$273,709

$275,280

$276,882

$278,513

$280,190

$281,900

$283,645

$285,414

$287,229

$289,080

$290,968

$292,884

$294,848

$296,852

$298,909

$300,996

$303,136

$305,319

$307,546

$309,806

$312,122

$314,485

$316,895

$319,342

$321,849

$324,406

$327,015

$329,664

$332,378

$335,145

$337,968

$340,837

$343,774

$346,770

$349,825

$352,931 BOY EOY Trust Fund Trust Trust Value Fund Fund Less Cost Earnings Value

$355,364

$1,185

$356,549

$296,722

$5,934

$302,656

$266,832

$5,337

$272,168

$268,342

$5,367

$273,709

$269,882

$5,398

$275,280

$271,453

$5,429

$276,882

$273,052

$5,461

$278,513

$274,696

$5,494

$280,190

$276,373

$5,527

$281,900

$278,083

$5,562

$283,645

$279,817

$5,596

$285,414

$281,597

$5,632

$287,229

$283,412

$5,668

$289,080

$285,263

$5,705

$290,968

$287,141

$5,743

$292,884

$289,067

$5,781

$294,848

$291,031

$5,821

$296,852

$293,048

$5,861

$298,909

$295,095

$5,902

$300,996

$297,193

$5,944

$303,136

$299,333

$5,987

$305,319

$301,516

$6,030

$307,546

$303,732

$6,075

$309,806

$306,002

$6,120

$312,122

$308,319

$6,166

$314,485

$310,681

$6,214

$316,895

$313,081

$6,262

$319,342

$315,538

$6,311

$321,849

$318,045

$6,361

$324,406

$320,602

$6,412

$327,015

$323,200

$6,464

$329,664

$325,860

$6,517

$332,378

$328,574

$6,571

$335,145

$331,342

$6,627

$337,968

$334,154

$6,683

$340,837

$337,033

$6,741

$343,774

$339,970

$6,799

$346,770

$342,966

$6,859

$349,825

$346,011

$6,920

$352,931

$349,127

$6,983

$356,110 Page 2 of 3

ATTACHMENT 5 Annual Radiological Decommissioning Funding Assurance Report for Byron Station, Unit 2 December 31, 2012 (Thousands of Dollars)

BOY BOY EOY Trust Trust Fund Trust Trust Fund Value Fund Fund Value Less Cost Earnings Value

$356,110

$352,306

$7,046

$359,352

$355,548

$7,111

$362,659

$358,845

$7,177

$366,022

$362,218

$7,244

$369,463

$365,659

$7,313

$372,972

$369,168

$7,383

$376,551

$372,737

$7,455

$380,192

$376,388

$7,528

$383,916

$380,112

$7,602

$387,714

$383,911

$7,678

$391,589

$387,775

$7,755

$395,530

$391,726

$7,835

$399,561

$385,084

$7,702

$392,786

$355,053

$7,101

$362,154

$263,165

$5,263

$268,428

$186,130

$3,723

$189,853

$125,882

$2,518

$128,400

$64,430

$1,289

$65,718

$35,403

$708

$36,111

$36,072

$721

$36,793

$36,754

$735

$37,489

$37,477

$750

$38,227

Column may not add due to rounding Radiological Decommissioning Year Cost*

2066

$ 3,804 2067

$ 3,804 2068

$ 3,814 2069

$ 3,804 2070

$ 3,804 2071

$ 3,804 2072

$ 3,814 2073

$ 3,804 2074

$ 3,804 2075

$ 3,804 2076

$ 3,814 2077

$ 3,804 2078

$ 14,477 2079

$ 37,732 2080

$98,990 2081

$ 82,298 2082

$ 63,970 2083

$ 63,970 2084

$ 30,316 2085 39 2086 39 2087 12 Total

$682,306 Page 3 of 3

ATTACHMENT 6 Annual Radiological Decommissioning Funding Assurance Report for Clinton Power Station, Unit 1 December 31, 2012 (Thousands of Dollars) 1 Formula cost amount per 10 CFR 50.75(c)

$679,560 2

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

$960,325 (a) 3 The amount of decommissioning trust funds accumulated as of December 31, 2012

$435,766 (b) 4 Schedule of the annual amounts remaining to be collected.

$0 5

Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (c) 6 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

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

8 Effective January 1, 2013, the Trustee named in the nuclear decommissioning trust agreements for Clinton Power Station Unit 1 changed from The Bank of New York Mellon (BYNM) to The Northern Trust Company (Northern), as detailed in the Reference 2 letter.

(a) This is based on the SAFSTOR scenario from the site-specific cost estimate, and is greater than the formula cost amount under 10 CFR 50.75(c), as required by 10 CFR 50.75(b)(1). The site-specific estimate has been previously provided in a letter from Patrick R. Simpson (EGC) to U.S.NRC, dated March 1, 2013 (TLG Report E16-1640 -

006, Revision 0, "Decommissioning Cost Analysis for the Clinton Power Station,"

December 2012). The costs have been escalated from 2012 (mid-year) dollars in the decommissioning cost estimate to December 31, 2012.

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

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

(d) For purposes of this report, permanent termination of operations (shutdown) is expected on September 29, 2026.

Page 1 of 3

ATTACHMENT 6 Annual Radiological Decommissioning Funding Assurance Report for Clinton Power Station, Unit 1 December 31, 2012 (Thousands of Dollars)

BOY BOY EOY Trust Trust Fund Trust Trust Fund Value Fund Fund Value Less Cost Earnings Value

$571,201

$555,203

$3,701

$558,904

$464,401

$9,288

$473,689

$449,064

$8,981

$458,045

$451,120

$9,022

$460,142

$453,217

$9,064

$462,281

$455,356

$9,107

$464,463

$459,764

$9,195

$468,959

$464,982

$9,300

$474,282

$470,305

$9,406

$479,711

$475,734

$9,515

$485,249

$481,261

$9,625

$490,886

$486,909

$9,738

$496,647

$492,670

$9,853

$502,524

$498,547

$9,971

$508,518

$504,530

$10,091

$514,621

$510,644

$10,213

$520,857

$516,880

$10,338

$527,217

$523,240

$10,465

$533,705

$529,710

$10,594

$540,304

$533,551

$10,671

$544,222

$537,469

$10,749

$548,218

$541,465

$10,829

$552,295

$545,523

$10,910

$556,434

$549,681

$10,994

$560,675

$553,922

$11,078

$565,000

$558,247

$11,165

$569,412

$562,641

$11,253

$573,893

$567,141

$11,343

$578,483

$571,730

$11,435

$583,165

$576,412

$11,528

$587,940

$581,169

$11,623

$592,792

$586,039

$11,721

$597,760

$591,007

$11,820

$602,828

$596,075

$11,921

$607,996

$601,225

$12,024

$613,249

$606,496

$12,130

$618,626

$611,873

$12,237

$624,111

$617,358

$12,347

$629,705

$622,934

$12,459

$635,392

$628,639

$12,573

$641,212 Page 2 of 3 Radiological Decommissioning Year Cost*

2026

$15,998 2027

$94,503 2028

$24,625 2029

$6,925 2030

$6,925 2031

$6,925 2032

$4,699 2033

$3,977 2034

$3,977 2035

$3,977 2036

$3,988 2037

$3,977 2038

$3,977 2039

$3,977 2040

$3,988 2041

$3,977 2042

$3,977 2043

$3,977 2044

$3,995 2045

$6,753 2046

$6,753 2047

$6,753 2048

$6,771 2049

$6,753 2050

$6,753 2051

$6,753 2052

$6,771 2053

$6,753 2054

$6,753 2055

$6,753 2056

$6,771 2057

$6,753 2058

$6,753 2059

$6,753 2060

$6,771 2061

$6,753 2062

$6,753 2063

$6,753 2064

$6,771 2065

$6,753

ATTACHMENT 6 Annual Radiological Decommissioning Funding Assurance Report for Clinton Power Station, Unit 1 December 31, 2012 (Thousands of Dollars)

BOY BOY EOY Trust Trust Fund Trust Trust Fund Value Fund Fund Value Less Cost Earnings Value

$641,212

$634,459

$12,689

$647,148

$640,396

$12,808

$653,203

$646,432

$12,929

$659,361

$652,608

$13,052

$665,660

$658,907

$13,178

$672,085

$665,332

$13,307

$678,639

$671,868

$13,437

$685,305

$678,552

$13,571

$692,123

$685,370

$13,707

$699,078

$692,325

$13,846

$706,171

$699,400

$13,988

$713,388

$706,635

$14,133

$720,767

$714,015

$14,280

$728,295

$721,542

$14,431

$735,973

$715,079

$14,302

$729,381

$669,128

$13,383

$682,511

$563,909

$11,278

$575,188

$464,553

$9,291

$473,844

$390,195

$7,804

$397,999

$314,668

$6,293

$320,961

$283,064

$5,661

$288,726

$288,626

$5,773

$294,398

$294,298

$5,886

$300,184

$300,183

$6,004

$306,187

Column may not add due to rounding Radiological Decommissioning Year Cost*

2066

$6,753 2067

$6,753 2068

$6,771 2069

$6,753 2070

$6,753 2071

$6,753 2072

$6,771 2073

$6,753 2074

$6,753 2075

$6,753 2076

$6,771 2077

$6,753 2078

$6,753 2079

$6,753 2080

$20,893 2081

$60,253 2082

$118,601 2083

$110,635 2084

$83,649 2085

$83,331 2086

$37,897 2087

$100 2088

$100 2089

$1 Total

$960,325 Page 3 of 3

ATTACHMENT 7 Annual Radiological Decommissioning Funding Assurance and Spent Fuel Management Report for Dresden Nuclear Power Station, Unit 1 December 31, 2012 (Thousands of Dollars) 1 Formula cost amount per 10 CFR 50.75(c)

N/A 2

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

$389,840 (a) 3 The amount of decommissioning trust funds accumulated as of December 31, 2012

$305,188 (b) 4 Schedule of the annual amounts remaining to be collected.

$0 5

Assumptions used regarding rates of escalation for decommissioning costs, earnings on funds, and other factors used in funding projections 2% (c) 6 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

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

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

9 2012 annual amount spent on decommissioning in

$2,840 (d) accordance with 10 CFR 50.82(a)(8)(v)(A) 10 Cumulative amount spent on decommissioning in

$104,680 (e) accordance with 10 CFR 50.82(a)(8)(v)(A)

Reimbursed from the decommissioning trust fund

$86,848 (e)

Not yet reimbursed from the decommissioning trust fund

$17,832 11 Amount of funds accumulated to cover the cost of managing

$10,986 irradiated fuel pursuant to 10 CFR 50.82(a)(8)(vii)(A) as of December 31, 2012 12 Projected cost of managing irradiated fuel based on site-

$14,033 (a) specific estimate per 10 CFR 50.82(a)(8)(vii)(B)

Page 1 of 4

ATTACHMENT 7 Annual Radiological Decommissioning Funding Assurance and Spent Fuel Management Report for Dresden Nuclear Power Station, Unit 1 December 31, 2012 (Thousands of Dollars)

(a) The site-specific amount per 10 CFR 50.75(b)(4) and 50.75(f)(2) assumes a DECON scenario as described in the site-specific cost estimate (TLG Report E16-1640-004, Revision 0, "Decommissioning Cost Analysis for the Dresden Nuclear Power Station Unit 1," August 2012). The decommissioning cost estimate has been adjusted consistent with the description of planned decommissioning activities in the Dresden Nuclear Power Station, Unit 1, PSDAR, as most recently updated in a letter from K.R. Jury (EGC) to U.S. NRC on January 5, 2007. The costs have been escalated from the 2012 (mid-year) dollars reflected in the 2012 decommissioning cost estimate to estimated costs as of December 31, 2012.

Decontamination and dismantlement of Dresden Nuclear Power Station, Unit 1, will take place beginning in 2029, coinciding with the decommissioning of Dresden Nuclear Power Station, Unit 2.

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

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

(d) This amount is consistent with the projected 2012 expense total from the site-specific cost estimate.

(e) Not all historical data was available, and therefore, the cumulative amounts spent on decommissioning are estimates based on the best information obtainable at this time.

Page 2 of 4

ATTACHMENT 7 Annual Radiological Decommissioning Funding Assurance and Spent Fuel Management Report for Dresden Nuclear Power Station, Unit 1 December 31, 2012 (Thousands of Dollars)

BOY Radiological Trust Decommissioning Fund Year Cost*

Value 2013

$2,919

$305,188 2014

$2,919

$308,314 2015

$2,919

$311,503 2016

$2,927

$314,755 2017

$2,919

$318,064 2018

$2,919

$321,448 2019

$2,919

$324,899 2020

$2,927

$328,419 2021

$2,919

$332,002 2022

$2,919

$335,664 2023

$2,919

$339,400 2024

$2,927

$343,210 2025

$2,919

$347,088 2026

$2,919

$351,052 2027

$2,919

$355,096 2028

$2,927

$359,220 2029

$36,701

$363,418 2030

$78,054

$333,251 2031

$84,841

$260,301 2032

$61,757

$178,969 2033

$46,446

$119,557 2034

$2,158

$74,573 2035

$2,158

$73,863 2036

$2,164

$73,140 2037

$17,557

$72,396 2038

$6,401

$55,935 2039

$89

$50,525 2040

$50

$51,445 2041

$52,422 2042

$4,722

$53,471 Total

$389,840

Column may not add due to rounding BOY EOY Trust Fund Trust Trust Value Fund Fund Less Cost Earnings Value

$302,269

$6,045

$308,314

$305,395

$6,108

$311,503

$308,583

$6,172

$314,755

$311,828

$6,237

$318,064

$315,145

$6,303

$321,448

$318,528

$6,371

$324,899

$321,980

$6,440

$328,419

$325,492

$6,510

$332,002

$329,082

$6,582

$335,664

$332,745

$6,655

$339,400

$336,480

$6,730

$343,210

$340,283

$6,806

$347,088

$344,169

$6,883

$351,052

$348,133

$6,963

$355,096

$352,176

$7,044

$359,220

$356,292

$7,126

$363,418

$326,717

$6,534

$333,251

$255,198

$5,104

$260,301

$175,460

$3,509

$178,969

$117,212

$2,344

$119,557

$73,111

$1,462

$74,573

$72,415

$1,448

$73,863

$71,706

$1,434

$73,140

$70,976

$1,420

$72,396

$54,838

$1,097

$55,935

$49,534

$991

$50,525

$50,436

$1,009

$51,445

$51,394

$1,028

$52,422

$1,048

$53,471

$48,749

$975

$49,724 Page 3of4

ATTACHMENT 7 Annual Radiological Decommissioning Funding Assurance and Spent Fuel Management Report for Dresden Nuclear Power Station, Unit 1 December 31, 2012 (Thousands of Dollars)

Irradiated Fuel Trust Fund Earnings

$220

$224

$229

$233

$238

$243

$247

$252

$257

$263

$268

$273

$279

$284

$290

$296

$286

$280

$276

$272

$268

$264

$260

$255

$222

$213

$203

$179

$137

$94

$85 BOY Irradiated Irradiated Fuel Fuel Trust Fund Year Cost*

Value 2013

$10,986 2014

$11,206 2015

$11,430 2016

$11,659 2017

$11,892 2018

$12,130 2019

$12,372 2020

$12,620 2021

$12,872 2022

$13,129 2023

$13,392 2024

$13,660 2025

$°

$13,933 2026

$14,212 2027

$14,496 2028

$14,786 2029

$785

$15,082 2030

$560

$14,582 2031

$481

$14,303 2032

$482

$14,098 2033

$481

$13,889 2034

$481

$13,676 2035

$481

$13,459 2036

$482

$13,238 2037

$1,935

$13,011 2038

$658

$11,298 2039

$704

$10,853 2040

$1,399

$10,352 2041

$2,286

$9,132 2042

$2,282

$6,983 2043

$537

$4,794 BOY Irradiated Fuel Trust Fund Less Cost

$10,986

$11,206

$11,430

$11,659

$11,892

$12,130

$12,372

$12,620

$12,872

$13,129

$13,392

$13,660

$13,933

$14,212

$14,496

$14,786

$14,296

$14,022

$13,822

$13,616

$13,408

$13,195

$12,978

$12,756

$11,076

$10,640

$10,149

$8,953

$6,846

$4,700

$4,257 EOY Irradiated Fuel Trust Fund Value

$11,206

$11,430

$11,659

$11,892

$12,130

$12,372

$12,620

$12,872

$13,129

$13,392

$13,660

$13,933

$14,212

$14,496

$14,786

$15,082

$14,582

$14,303

$14,098

$13,889

$13,676

$13,459

$13,238

$13,011

$11,298

$10,853

$10,352

$9,132

$6,983

$4,794

$4,343 Total

$14,033

Column may not add due to rounding Page 4 of 4

ATTACHMENT 8 Annual Radiological Decommissioning Funding Assurance Report for Dresden Nuclear Power Station, Unit 2 December 31, 2012 (Thousands of Dollars) 1 Formula cost amount per 10 CFR 50.75(c)

$657,477 2

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

N/A 3

The amount of decommissioning trust funds accumulated as of December 31, 2012

$532,132 (a) 4 Schedule of the annual amounts remaining to be collected.

$0 5

Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (b) 6 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

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

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

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

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

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

Page 1 of 1

ATTACHMENT 9 Annual Radiological Decommissioning Funding Assurance Report for Dresden Nuclear Power Station, Unit 3 December 31, 2012 (Thousands of Dollars) 1 Formula cost amount per 10 CFR 50.75(c)

$657,477 2

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

N/A 3

The amount of decommissioning trust funds accumulated as of December 31, 2012

$543,988 (a) 4 Schedule of the annual amounts remaining to be collected.

$0 5

Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (b) 6 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

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

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

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

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

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

Page 1 of 1

ATTACHMENT 10 Annual Radiological Decommissioning Funding Assurance Report for LaSalle County Station, Unit 1 December 31, 2012 (Thousands of Dollars) 1 Formula cost amount per 10 CFR 50.75(c)

$679,560 2

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

$711,587 (a) 3 The amount of decommissioning trust funds accumulated as of December 31, 2012

$391,301 (b) 4 Schedule of the annual amounts remaining to be collected.

$0 5

Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (c) 6 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

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

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

(a) This is based on the SAFSTOR scenario from the site-specific cost estimate, and is greater than the formula cost amount under 10 CFR 50.75(c), as required by 10 CFR 50.75(b)(1). The site-specific estimate has been previously provided in a letter from Patrick R. Simpson (EGC) to U.S.NRC, dated August 27, 2009 (TLG Report E16 -

1555-012, Revision 0, "Decommissioning Cost Analysis for the LaSalle County Station Units 1 and 2," June 2009). The costs have been escalated from the 2009 dollars in the decommissioning cost estimate to December 31, 2012.

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

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

(d) For purposes of this report, permanent termination of operations (shutdown) is expected on April 17, 2022.

Page 1 of 3

ATTACHMENT 10 Annual Radiological Decommissioning Funding Assurance Report for LaSalle County Station, Unit 1 December 31, 2012 (Thousands of Dollars)

BOY BOY EOY Trust Trust Fund Trust Trust Fund Value Fund Fund Value Less Cost Earnings Value

$469,962

$434,963

$6,524

$441,488

$382,137

$7,643

$389,779

$386,191

$7,724

$393,915

$390,337

$7,807

$398,144

$394,566

$7,891

$402,457

$399,025

$7,980

$407,005

$404,118

$8,082

$412,200

$409,321

$8,186

$417,507

$414,628

$8,293

$422,920

$420,041

$8,401

$428,441

$425,554

$8,511

$434,065

$431,186

$8,624

$439,809

$436,930

$8,739

$445,668

$442,784

$8,856

$451,640

$447,132

$8,943

$456,074

$451,578

$9,032

$460,610

$456,114

$9,122

$465,236

$460,740

$9,215

$469,955

$465,446

$9,309

$474,755

$470,259

$9,405

$479,664

$475, 168

$9,503

$484,671

$480,175

$9,604

$489,779

$485,270

$9,705

$494,976

$490,480

$9,810

$500,289

$495,793

$9,916

$505,709

$501,213

$10,024

$511,237

$506,729

$10,135

$516,863

$512,367

$10,247

$522,615

$518,118

$10,362

$528,481

$523,985

$10,480

$534,464

$529,956

$10,599

$540,555

$536,059

$10,721

$546,780

$542,284

$10,846

$553,130

$548,634

$10,973

$559,606

$555,098

$11,102

$566,200

$561,704

$11,234

$572,938

$568,442

$11,369

$579,810

$575,314

$11,506

$586,821

$582,312

$11,646

$593,958

$589,462

$11,789

$601,252 Page 2 of 3 Radiological Decommissioning Year Cost*

2022

$34,999 2023

$59,351 2024

$3,588 2025

$3,578 2026

$3,578 2027

$3,433 2028

$2,887 2029

$2,880 2030

$2,880 2031

$2,880 2032

$2,887 2033

$2,880 2034

$2,880 2035

$2,884 2036

$4,508 2037

$4,496 2038

$4,496 2039

$4,496 2040

$4,508 2041

$4,496 2042

$4,496 2043

$4,496 2044

$4,508 2045

$4,496 2046

$4,496 2047

$4,496 2048

$4,508 2049

$4,496 2050

$4,496 2051

$4,496 2052

$4,508 2053

$4,496 2054

$4,496 2055

$4,496 2056

$4,508 2057

$4,496 2058

$4,496 2059

$4,496 2060

$4,508 2061

$4,496

ATTACHMENT 10 Annual Radiological Decommissioning Funding Assurance Report for LaSalle County Station, Unit 1 December 31, 2012 (Thousands of Dollars)

BOY BOY EOY Trust Trust Fund Trust Trust Fund Value Fund Fund Value Less Cost Earnings Value

$601,252

$596,755

$11,935

$608,691

$604,194

$12,084

$616,278

$611,770

$12,235

$624,005

$619,509

$12,390

$631,899

$627,403

$12,548

$639,951

$635,455

$12,709

$648,164

$643,656

$12,873

$656,529

$652,033

$13,041

$665,074

$660,578

$13,212

$673,789

$669,293

$13,386

$682,679

$678,170

$13,563

$691,734

$687,238

$13,745

$700,982

$696,486

$13,930

$710,416

$688,091

$13,762

$701,853

$642,105

$12,842

$654,947

$538,597

$10,772

$549,369

$468,886

$9,378

$478,264

$418,548

$8,371

$426,919

$392,362

$7,847

$400,209

$380,443

$7,609

$388,052

$376,609

$7,532

$384,142

$384,028

$7,681

$391,709

$391,676

$7,834

$399,510

Column may not add due to rounding Radiological Decommissioning Year Cost*

2062

$4,496 2063

$4,496 2064

$4,508 2065

$4,496 2066

$4,496 2067

$4,496 2068

$4,508 2069

$4,496 2070

$4,496 2071

$4,496 2072

$4,508 2073

$4,496 2074

$4,496 2075

$22,325 2076

$59,748 2077

$116,349 2078

$80,484 2079

$59,716 2080

$34,557 2081

$19,766 2082

$11,442 2083

$113 2084

$33 Total

$711,587 Page 3 of 3

ATTACHMENT 11 Annual Radiological Decommissioning Funding Assurance Report for LaSalle County Station, Unit 2 December 31, 2012 (Thousands of Dollars) 1 Formula cost amount per 10 CFR 50.75(c)

$679,560 2

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

$697,445 (a) 3 The amount of decommissioning trust funds accumulated as of December 31, 2012

$384,788 (b) 4 Schedule of the annual amounts remaining to be collected.

$0 5

Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (c) 6 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

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

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

(a) This is based on the SAFSTOR scenario from the site-specific cost estimate, and is greater than the formula cost amount under 10 CFR 50.75(c), as required by 10 CFR 50.75(b)(1). The site-specific estimate has been previously provided in a letter from Patrick R. Simpson (EGC) to U.S.NRC, dated August 27, 2009 (TLG Report E16 -

1555-012, Revision 0, "Decommissioning Cost Analysis for the LaSalle County Station Units 1 and 2," June 2009). The costs have been escalated from the 2009 dollars in the decommissioning cost estimate to December 31, 2012.

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

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

(d) For purposes of this report, permanent termination of operations (shutdown) is expected on December 16, 2023.

Page 1 of 3

ATTACHMENT 11 Annual Radiological Decommissioning Funding Assurance Report for LaSalle County Station, Unit 2 December 31, 2012 (Thousands of Dollars)

BOY BOY EOY Trust Trust Fund Trust Trust Fund Value Fund Fund Value Less Cost Earnings Value

$477,646

$475,317

$792

$476,110

$419,960

$8,399

$428,359

$385,433

$7,709

$393,142

$389,470

$7,789

$397,260

$393,588

$7,872

$401,460

$397,779

$7,956

$405,734

$402,581

$8,052

$410,633

$407,917

$8,158

$416,075

$413,360

$8,267

$421,627

$418,904

$8,378

$427,282

$424,566

$8,491

$433,057

$430,342

$8,607

$438,948

$436,230

$8,725

$444,955

$441,293

$8,826

$450,119

$446,467

$8,929

$455,396

$451,744

$9,035

$460,779

$457,127

$9,143

$466,269

$462,608

$9,252

$471,860

$468,208

$9,364

$477,572

$473,920

$9,478

$483,398

$479,746

$9,595

$489,341

$485,679

$9,714

$495,393

$491,741

$9,835

$501,576

$497,924

$9,958

$507,882

$504,230

$10,085

$514,315

$510,653

$10,213

$520,866

$517,214

$10,344

$527,558

$523,907

$10,478

$534,385

$530,733

$10,615

$541,347

$537,685

$10,754

$548,439

$544,787

$10,896

$555,683

$552,031

$11,041

$563,072

$559,420

$11,188

$570,608

$566,946

$11,339

$578,285

$574,633

$11,493

$586,126

$582,474

$11,649

$594,123

$590,471

$11,809

$602,281

$598,619

$11,972

$610,591

$606,939

$12,139

$619,078

$615,426

$12,309

$627,735 Page 2 of 3 Radiological Decommissioning Year Cost*

2023

$2,329 2024

$56,150 2025

$42,926 2026

$3,671 2027

$3,671 2028

$3,681 2029

$3,153 2030

$2,716 2031

$2,716 2032

$2,723 2033

$2,716 2034

$2,716 2035

$2,718 2036

$3,662 2037

$3,652 2038

$3,652 2039

$3,652 2040

$3,662 2041

$3,652 2042

$3,652 2043

$3,652 2044

$3,662 2045

$3,652 2046

$3,652 2047

$3,652 2048

$3,662 2049

$3,652 2050

$3,652 2051

$3,652 2052

$3,662 2053

$3,652 2054

$3,652 2055

$3,652 2056

$3,662 2057

$3,652 2058

$3,652 2059

$3,652 2060

$3,662 2061

$3,652 2062

$3,652

ATTACHMENT 11 Annual Radiological Decommissioning Funding Assurance Report for LaSalle County Station, Unit 2 December 31, 2012 (Thousands of Dollars)

BOY BOY EOY Trust Trust Fund Trust Trust Fund Value Fund Fund Value Less Cost Earnings Value

$627,735

$624,083

$12,482

$636,564

$632,902

$12,658

$645,560

$641,908

$12,838

$654,747

$651,095

$13,022

$664,116

$660,465

$13,209

$673,674

$670,012

$13,400

$683,412

$679,760

$13,595

$693,355

$689,703

$13,794

$703,497

$699,846

$13,997

$713,842

$710,180

$14,204

$724,384

$720,732

$14,415

$735,147

$731,495

$14,630

$746,125

$742,473

$14,849

$757,322

$740,521

$14,810

$755,332

$715,779

$14,316

$730,094

$610,985

$12,220

$623,205

$530,985

$10,620

$541,605

$463,019

$9,260

$472,279

$411,298

$8,226

$419,524

$407,455

$8,149

$415,604

$415,556

$8,311

$423,867

$423,854

$8,477

$432,331

Column may not add due to rounding Radiological Decommissioning Year Cost*

2063

$3,652 2064

$3,662 2065

$3,652 2066

$3,652 2067

$3,652 2068

$3,662 2069

$3,652 2070

$3,652 2071

$3,652 2072

$3,662 2073

$3,652 2074

$3,652 2075

$3,652 2076

$16,801 2077

$39,553 2078

$119,109 2079

$92,220 2080

$78,586 2081

$60,981 2082

$12,069 2083

$47 2084

$14 Total

$697,445 Page 3of3

ATTACHMENT 12 Annual Radiological Decommissioning Funding Assurance Report for Limerick Generating Station, Unit 1 December 31, 2012 (Thousands of Dollars) 1 Formula cost amount per 10 CFR 50.75(c)

$691,487 2

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

N/A 3

The amount of decommissioning trust funds accumulated as of December 31, 2012

$293,437 (a) 4 Schedule of the annual amounts remaining to be collected.

$8,232 (b) 5 Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 3% (c) 6 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

7 Financial assurance for decommissioning is provided by the external sinking fund method, coupled with an external trust fund, in accordance with 10 CFR 50.75(e)(1)(ii). A parent guarantee, as allowed by 10 CFR 50.75 (e)(iii)(B), is also in place for Limerick Generating Station, Unit 1 in the amount of $115 million. (e) 8 Effective January 1, 2013, the Trustee named in the nuclear decommissioning trust agreements for Limerick Generating Station Unit 1 changed from The Bank of New York Mellon (BYNM) to The Northern Trust Company (Northern), as detailed in the Reference 2 letter. The Reference 3 letter describes the parent company guarantee Standby Trust created for Limerick Generating Station Unit 1 with Northern, effective November 15, 2012.

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

(b) The funding mechanism being used as the source of revenues for the external sinking funds is a non-bypassable charge approved by the Pennsylvania Public Utilities Commission ("PaPUC") authorizing PECO Energy Company to continue to collect decommissioning funds for EGC. Any needed adjustments to the amount collected will be made in the next filing of the Nuclear Decommissioning Cost Adjustment ("NDCA") to the PaPUC. This cost adjustment is made every five years pursuant to PaPUC Electric Tariff No. 4. The last adjustment was effective January 1, 2013 and allows for the collection of annual payments from ratepayers of $8,232K through 2023.

Page 1 of 2

ATTACHMENT 12 Annual Radiological Decommissioning Funding Assurance Report for Limerick Generating Station, Unit 1 (c) 10 CFR 50.75(e)(1)(ii) allows licensees to use a rate of return higher than 2% if the applicable rate-setting authority has specifically authorized a higher rate. The PaPUC approved a 3% real rate of return as part of the approval of the restructuring plan for PECO Energy Company (Letter from J. J. McNulty (PaPUC), "Approval of Restructuring Plan for PECO Energy Company under Section 2806 of the Public Utility Code; Docket No. R-00973953," to R. D. Crowe (PECO Energy Company) dated May 3, 2001). Accordingly, EGC uses a 3% real rate of return.

(d) For purposes of this report, permanent termination of operations (shutdown) is expected on October 26, 2024.

(e) The parent guarantee for Limerick Generating Station, Unit 1 was previously submitted in a letter from Patrick R. Simpson (EGC) to U.S. NRC, "Response to Additional Information Regarding Status of Decommissioning Funding Assurance,"

dated May 21, 2012. The updated financial tests and Independent Auditor's Report for the parent guarantee are contained in Attachments 23 and 24 respectively.

Page 2of2

ATTACHMENT 13 Annual Radiological Decommissioning Funding Assurance Report for Limerick Generating Station, Unit 2 December 31, 2012 (Thousands of Dollars) 1 Formula cost amount per 10 CFR 50.75(c)

$691,487 2

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

N/A 3

The amount of decommissioning trust funds accumulated as of December 31, 2012

$304,237 (a) 4 Schedule of the annual amounts remaining to be collected.

$13,105 (b) 5 Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 3% (c) 6 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

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

8 Effective January 1, 2013, the Trustee named in the nuclear decommissioning trust agreements for Limerick Generating Station Unit 2 changed from The Bank of New York Mellon (BYNM) to The Northern Trust Company (Northern), as detailed in the Reference 2 letter.

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

(b) The funding mechanism being used as the source of revenues for the external sinking funds is a non-bypassable charge approved by the Pennsylvania Public Utilities Commission ("PaPUC") authorizing PECO Energy Company to continue to collect decommissioning funds for EGC. Any needed adjustments to the amount collected will be made in the next filing of the Nuclear Decommissioning Cost Adjustment ("NDCA") to the PaPUC. This cost adjustment is made every five years pursuant to PaPUC Electric Tariff No. 4. The last adjustment was effective January 1, 2013, and allows for the collection of annual payments from ratepayers of

$13,105K through 2028.

(c) 10 CFR 50.75(e)(1)(ii) allows licensees to use a rate of return higher than 2% if the applicable rate-setting authority has specifically authorized a higher rate. The PaPUC approved a 3% real rate of return as part of the approval of the restructuring plan for PECO Energy Company (Letter from J. J. McNulty (PaPUC), "Approval of Restructuring Plan for PECO Energy Company under Section 2806 of the Public Utility Code; Docket No. R-00973953," to B. D. Crowe (PECO Energy Company) dated May 3, 2001). Accordingly, EGC uses a 3% real rate of return.

Page 1 of 2

ATTACHMENT 13 Annual Radiological Decommissioning Funding Assurance Report for Limerick Generating Station, Unit 2 December 31, 2012 (Thousands of Dollars)

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

Page 2 of 2

ATTACHMENT 14 Annual Radiological Decommissioning Funding Assurance Report for Oyster Creek Nuclear Generating Station December 31, 2012 (Thousands of Dollars) 1 Formula cost amount per 10 CFR 50.75(c)

$621,672 2

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

N/A 3

The amount of decommissioning trust funds accumulated as of December 31, 2012

$814,066 (a) 4 Schedule of the annual amounts remaining to be collected.

$0 5

Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (b) 6 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

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

8 Effective January 1, 2013, the Trustee named in the nuclear decommissioning trust agreements for Oyster Creek Nuclear Generating Station changed from The Bank of New York Mellon (BYNM) to The Northern Trust Company (Northern), as detailed in the Reference 2 letter.

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

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

(c) For purposes of this report, permanent termination of operations (shutdown) is expected on December 31, 2019. This date is based on the State of New Jersey Administrative Consent Order, dated December 9, 2010.

Page 1 of 1

ATTACHMENT 15 Annual Radiological Decommissioning Funding Assurance Report for Peach Bottom Atomic Power Station, Unit 1 December 31, 2012 (Thousands of Dollars) 1 Formula cost amount per 10 CFR 50.75(c)

N/A 2

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

$200,545 (a) 3 The amount of decommissioning trust funds accumulated as of December 31, 2012

$73,592 (b) 4 Schedule of the annual amounts remaining to be collected.

$2,118 (c) 5 Assumptions used regarding rates of escalation for decommissioning costs, earnings on funds, and other factors used in funding projections 3% (d) 6 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

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

8 Effective January 1, 2013, the Trustee named in the nuclear decommissioning trust agreements for Peach Bottom Atomic Power Station Unit 1 changed from The Bank of New York Mellon (BYNM) to The Northern Trust Company (Northern), as detailed in the Reference 2 letter.

9 2012 annual amount spent on decommissioning in

$276 accordance with 10 CFR 50.82(a)(8)(v)(A).

10 Cumulative amount spent on decommissioning in accordance

$1,328 with 10 CFR 50.82(a)(8)(v)(A).

Reimbursed from the decommissioning trust fund

$0 Not yet reimbursed from the decommissioning trust fund

$1,328 (a) The site-specific amount per 10 CFR 50.75(b)(4) and 50.75(f)(2) assumes a DECON scenario as described in the site-specific cost estimate (TLG Report El 6-1555-015, Revision 0, "Decommissioning Cost Analysis for the Peach Bottom Atomic Power Station Unit 1," June 2010). The decommissioning cost estimate has been adjusted consistent with the description of planned decommissioning activities in the Peach Bottom, Unit 1, Decommissioning Plan. The costs have been escalated from the 2010 dollars reflected in the 2010 decommissioning cost estimate to estimated costs as of December 31, 2012.

Decontamination and dismantlement of Peach Bottom Atomic Power Station, Unit 1, will take place beginning in 2033, coinciding with the decommissioning of Peach Bottom Atomic Power Station, Unit 2.

Page 1 of 3

ATTACHMENT 15 Annual Radiological Decommissioning Funding Assurance Report for Peach Bottom Atomic Power Station, Unit 1 December 31, 2012 (Thousands of Dollars)

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

(c) The funding mechanism being used as the source of revenues for the external sinking funds is a non-bypassable charge approved by the Pennsylvania Public Utilities Commission (PaPUC) authorizing PECO Energy Company to continue to collect decommissioning funds for EGC. Any needed adjustments to the amount collected will be made in the next filing of the Nuclear Decommissioning Cost Adjustment (NDCA) to the PaPUC. This cost adjustment is made every five years pursuant to PaPUC Electric Tariff No. 4. The last adjustment was effective January 1, 2013, and allows for the collection of annual payments from ratepayers of $2,118K through 2032.

(d) 10 CFR 50.75(e)(1)(ii) allows licensees to use a rate of return higher than 2% if the applicable rate-setting authority has specifically authorized a higher rate. The PaPUC approved a 3% real rate of return as part of the approval of the restructuring plan for PECO Energy Company (Letter from J. J. McNulty (PaPUC), "Approval of Restructuring Plan for PECO Energy Company under Section 2806 of the Public Utility Code; Docket No. R-00973953," to B. D. Crowe (PECO Energy Company) dated May 3, 2001). Accordingly, EGC uses a 3% real rate of return.

(e) Peach Bottom Atomic Power Station, Unit 1 was shut down in October of 1974, with defueling of the core completed by the following June. Starting in 1975, the spent fuel was shipped by truck to Idaho. The final of 44 shipments was completed in February of 1977. Consequently, no irradiated fuel remains on-site, and therefore 10 CFR 50.82(a)(8)(vii) does not apply.

Page 2of3

ATTACHMENT 15 Annual Radiological Decommissioning Funding Assurance Report for Peach Bottom Atomic Power Station, Unit 1 December 31, 2012 (Thousands of Dollars)

BOY Trust Fund Value Radiological Year Decommissioning Cost*

BOY Trust First Half Trust Fund Second Half EOY Trust Fund Value Contributions Earnings Contributions Fund Value Less Cost**

2013

$73,592

$1,059

$2,240

$1,059

$77,950 2014

$77,950

$1,059

$2,370

$1,059

$82,438 2015

$82,438

$1,059

$2,505

$1,059

$87,060 2016

$87,060

$1,059

$2,644

$1,059

$91,822 2017

$91,822

$1,059

$2,786

$1,059

$96,726 2018

$96,726

$1,059

$2,934

$1,059

$101,777 2019

$101,777

$1,059

$3,085

$1,059

$106,980 2020

$106,980

$1,059

$3,241

$1,059

$112,339 2021

$112,339

$1,059

$3,402

$1,059

$117,859 2022

$117,859

$1,059

$3,568

$1,059

$123,544 2023

$123,544

$1,059

$3,738

$1,059

$129,400 2024

$129,400

$1,059

$3,914

$1,059

$135,432 2025

$135,432

$1,059

$4,095

$1,059

$141,644 2026

$141,644

$1,059

$4,281

$1,059

$148,043 2027

$148,043

$1,059

$4,473

$1,059

$154,634 2028

$154,634

$1,059

$4,671

$1,059

$161,422 2029

$161,422

$1,059

$4,874

$1,059

$168,415 2030

$168,415

$1,059

$5,084

$1,059

$175,617 2031

$175,617

$1,059

$5,300

$1,059

$183,035 2032

$183,035

$1,059

$5,523

$1,059

$190,675 2033

$33,771

$190,675

$156,904

$4,707

$161,611 2034

$51,471

$161,611

$110,140

$3,304

$113,444 2035

$51,476

$113,444

$61,968

$1,859

$63,827 2036

$40,534

$63,827

$23,293

$699

$23,992 2037

$23,292

$23,992

$699

$21

$720 Total

$200,545

Column may not add due to rounding

- Annual contributions added to individual years - Earnings of half of contributions are included in current year to estimate payment of contributions throughout the year Page 3of3

ATTACHMENT 16 Annual Radiological Decommissioning Funding Assurance Report for Peach Bottom Atomic Power Station, Unit 2 December 31, 2012 (Thousands of Dollars) 1 Formula cost amount per 10 CFR 50.75(c)

$345,744 2

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

N/A 3

The amount of decommissioning trust funds accumulated as of December 31, 2012

$205,986 (b) 4 Schedule of the annual amounts remaining to be collected.

$0 (c) 5 Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 3% (d) 6 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

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

8 Effective January 1, 2013, the Trustee named in the nuclear decommissioning trust agreements for Peach Bottom Atomic Power Station Unit 2 changed from The Bank of New York Mellon (BYNM) to The Northern Trust Company (Northern), as detailed in the Reference 2 letter.

(a) All values are based on the EGC ownership share of Peach Bottom Atomic Power Station, Unit 2 of 50%.

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

(c) The funding mechanism being used as the source of revenues for the external sinking funds is a non-bypassable charge approved by the Pennsylvania Public Utilities Commission (PaPUC) authorizing PECO Energy Company to continue to collect decommissioning funds for EGC. Any needed adjustments to the amount collected will be made in the next filing of the Nuclear Decommissioning Cost Adjustment (NDCA) to the PaPUC. This cost adjustment is made every five years pursuant to PaPUC Electric Tariff No. 4. The last adjustment was effective January 1, 2013, and allows for the collection of annual payments from ratepayers of $0 through 2032.

Page 1 of 2

ATTACHMENT 16 Annual Radiological Decommissioning Funding Assurance Report for Peach Bottom Atomic Power Station, Unit 2 (d) 10 CFR 50.75(e)(1)(ii) allows licensees to use a rate of return higher than 2% if the applicable rate-setting authority has specifically authorized a higher rate. The PaPUC approved a 3% real rate of return as part of the approval of the restructuring plan for PECO Energy Company (Letter from J. J. McNulty (PaPUC), "Approval of Restructuring Plan for PECO Energy Company under Section 2806 of the Public Utility Code; Docket No. R-00973953," to B. D. Crowe (PECO Energy Company) dated May 3, 2001). Accordingly, EGC uses a 3% real rate of return.

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

Page 2 of 2

ATTACHMENT 17 Annual Radiological Decommissioning Funding Assurance Report for Peach Bottom Atomic Power Station, Unit 3 December 31, 2012 (Thousands of Dollars) 1 Formula cost amount per 10 CFR 50.75(c)

$345,744 2

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

N/A 3

The amount of decommissioning trust funds accumulated as of December 31, 2012

$221,590 (b) 4 Schedule of the annual amounts remaining to be collected.

$0 (c) 5 Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 3% (d) 6 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

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

8 Effective January 1, 2013, the Trustee named in the nuclear decommissioning trust agreements for Peach Bottom Atomic Power Station Unit 3 changed from The Bank of New York Mellon (BYNM) to The Northern Trust Company (Northern), as detailed in the Reference 2 letter.

(a) All values are based on the EGC ownership share of Peach Bottom Atomic Power Station, Unit 3 of 50%.

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

(c) The funding mechanism being used as the source of revenues for the external sinking funds is a non-bypassable charge approved by the Pennsylvania Public Utilities Commission (PaPUC) authorizing PECO Energy Company to continue to collect decommissioning funds for EGC. Any needed adjustments to the amount collected will be made in the next filing of the Nuclear Decommissioning Cost Adjustment (NDCA) to the PaPUC. This cost adjustment is made every five years pursuant to PaPUC Electric Tariff No. 4. The last adjustment was effective January 1, 2013, and allows for the collection of annual payments from ratepayers of $0 through 2033.

Page 1 of 2

ATTACHMENT 17 Annual Radiological Decommissioning Funding Assurance Report for Peach Bottom Atomic Power Station, Unit 3 (d) 10 CFR 50.75(e)(1)(ii) allows licensees to use a rate of return higher than 2% if the applicable rate-setting authority has specifically authorized a higher rate. The PaPUC approved a 3% real rate of return as part of the approval of the restructuring plan for PECO Energy Company (Letter from J. J. McNulty (PaPUC), "Approval of Restructuring Plan for PECO Energy Company under Section 2806 of the Public Utility Code; Docket No. R-00973953," to B. D. Crowe (PECO Energy Company) dated May 3, 2001). Accordingly, EGC uses a 3% real rate of return.

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

Page 2 of 2

ATTACHMENT 18 Annual Radiological Decommissioning Funding Assurance Report for Quad Cities Nuclear Power Station, Unit 1 December 31, 2012 (Thousands of Dollars) 1 Formula cost amount per 10 CFR 50.75(c)

$493,108 2

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

N/A 3

The amount of decommissioning trust funds accumulated as of December 31, 2012

$332,504 (b) 4 Schedule of the annual amounts remaining to be collected.

$0 5

Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (c) 6 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

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

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

(a) All values are based on the EGC ownership share of Quad Cities Nuclear Power Station, Unit 1 of 75%.

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

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

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

Page 1 of 1

ATTACHMENT 19 Annual Radiological Decommissioning Funding Assurance Report for Quad Cities Nuclear Power Station, Unit 2 December 31, 2012 (Thousands of Dollars) 1 Formula cost amount per 10 CFR 50.75(c)

$493,108 2

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

N/A 3

The amount of decommissioning trust funds accumulated as of December 31, 2012

$377,488 (b) 4 Schedule of the annual amounts remaining to be collected.

$0 5

Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (c) 6 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

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

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

(a) All values are based on the ECC ownership share of Quad Cities Nuclear Power Station, Unit 2 of 75%.

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

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

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

Page 1 of 1

ATTACHMENT 20 Annual Radiological Decommissioning Funding Assurance Report for Salem Generating Station, Unit 1 December 31, 2012 (Thousands of Dollars) 1 Formula cost amount per 10 CFR 50.75(c)

$225,929 2

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

N/A 3

The amount of decommissioning trust funds accumulated as of December 31, 2012

$187,536 (b) 4 Schedule of the annual amounts remaining to be collected.

$0 (c) 5 Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 3% (d) 6 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

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

8 Effective January 1, 2013, the Trustee named in the nuclear decommissioning trust agreements for Salem Generating Station Unit 1 changed from The Bank of New York Mellon (BYNM) to The Northern Trust Company (Northern), as detailed in the Reference 2 letter.

(a) All values are based on the EGC ownership share of Salem Generating Station, Unit 1 of 42.59%.

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

(c) The funding mechanism being used as the source of revenues for the external sinking funds is a non-bypassable charge approved by the Pennsylvania Public Utilities Commission (PaPUC) authorizing PECO Energy Company to continue to collect decommissioning funds for EGC. Any needed adjustments to the amount collected will be made in the next filing of the Nuclear Decommissioning Cost Adjustment (NDCA) to the PaPUC. This cost adjustment is made every five years pursuant to PaPUC Electric Tariff No, 4. The last adjustment was effective January 1, 2013, and allows for the collection of annual payments from ratepayers of $0 through 2035.

Page 1 of 2

ATTACHMENT 20 Annual Radiological Decommissioning Funding Assurance Report for Salem Generating Station, Unit 1 (d) 10 CFR 50.75(e)(1)(ii) allows licensees to use a rate of return higher than 2% if the applicable rate-setting authority has specifically authorized a higher rate. The PaPUC approved a 3% real rate of return as part of the approval of the restructuring plan for PECO Energy Company (Letter from J. J. McNulty (PaPUC), "Approval of Restructuring Plan for PECO Energy Company under Section 2806 of the Public Utility Code; Docket No. R-00973953," to B. D. Crowe (PECO Energy Company) dated May 3, 2001). Accordingly, EGC uses a 3% real rate of return.

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

Page 2 of 2

ATTACHMENT 21 Annual Radiological Decommissioning Funding Assurance Report for Salem Generating Station, Unit 2 December 31, 2012 (Thousands of Dollars) 1 Formula cost amount per 10 CFR 50.75(c)

$225,929 2

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

N/A 3

The amount of decommissioning trust funds accumulated as of December 31, 2012

$157,402 (b) 4 Schedule of the annual amounts remaining to be collected.

$0 (c) 5 Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 3% (d) 6 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

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

8 Effective January 1, 2013, the Trustee named in the nuclear decommissioning trust agreements for Salem Generating Station Unit 2 changed from The Bank of New York Mellon (BYNM) to The Northern Trust Company (Northern), as detailed in the Reference 2 letter.

(a) All values are based on the EGC ownership share of Salem Generating Station, Unit 2 of 42.59%.

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

(c) The funding mechanism being used as the source of revenues for the external sinking funds is a non-bypassable charge approved by the Pennsylvania Public Utilities Commission (PaPUC) authorizing PECO Energy Company to continue to collect decommissioning funds for EGG. Any needed adjustments to the amount collected will be made in the next filing of the Nuclear Decommissioning Cost Adjustment (NDCA) to the PaPUC. This cost adjustment is made every five years pursuant to PaPUC Electric Tariff No. 4. The last adjustment was effective January 1, 2013, and allows for the collection of annual payments from ratepayers of $0 through 2039.

Page 1 of 2

ATTACHMENT 21 Annual Radiological Decommissioning Funding Assurance Report for Salem Generating Station, Unit 2 (d) 10 CFR 50.75(e)(1)(ii) allows licensees to use a rate of return higher than 2% if the applicable rate-setting authority has specifically authorized a higher rate. The PaPUC approved a 3% real rate of return as part of the approval of the restructuring plan for PECO Energy Company (Letter from J. J. McNulty (PaPUC), "Approval of Restructuring Plan for PECO Energy Company under Section 2806 of the Public Utility Code; Docket No. R-00973953," to B. D. Crowe (PECO Energy Company) dated May 3, 2001). Accordingly, EGC uses a 3% real rate of return.

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

Page 2 of 2

ATTACHMENT 22 Annual Radiological Decommissioning Funding Assurance Report for Three Mile Island Nuclear Station, Unit 1 December 31, 2012 (Thousands of Dollars) 1 Formula cost amount per 10 CFR 50.75(c)

$493,080 2

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

N/A 3

The amount of decommissioning trust funds accumulated as of December 31, 2012

$530,826 (a) 4 Schedule of the annual amounts remaining to be collected.

$0 5

Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (b) 6 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1 )(v).

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

8 Effective January 1, 2013, the Trustee named in the nuclear decommissioning trust agreements for Three Mile Island Nuclear Station Unit 1 changed from The Bank of New York Mellon (BYNM) to The Northern Trust Company (Northern),

as detailed in the Reference 2 letter.

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

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

(c) For purposes of this report, permanent termination of operations (shutdown) is expected on April 19, 2034.

Page 1 of 1

ATTACHMENT 23 Parent Company Guarantee Financial Test for Limerick Generating Station, Unit 1 December 31, 2012 Limerick Unit 1 Regulation, Appendix Ato Pan 30 Financial Test (Dollarsin millions (1) Current rating for parent company's most recent uninsured, uncollateralized, and unencumbered bond issuance of AAA, AA, A, or BBB (including adjustments of + or -) as issued by Standard and Poor's or AAA, AA, A, or BAA (including adjustment of 1, 2, or 3) as issued by Moody's Exelon's Current Senior Unsecured Debt Retinas:

Current S&P BBB-Moody s...,.

Baal Meet criteria (YIN)?

Yes A - Represents the current senior unsecured debt ratings as of December 31, 2012 for Exelon's 2005 Senior Unsecured Notes maturing in 2015.

(ii) Total net worth each at least six times the amount of decommissioning funds being assured by a parent company guarantee for the total of all nuclear facilities or parts thereof (or prescribed amount if a certification is used). Total net worth, which may include intangible assets, nd goodwill of the nuclear facility.

Total Shareholders' Equity 21,730 Ties to 10-K 11 1111 11 Net Book Value of Exelon owned nuclear stations (735),

Prodded by Siddarth Desai Plant Accounting r Total Net Worth 20,995 Amount of decommissioning funds being assured by parent ouarantee for total of all nuclear facilities:

(a) -Though the guidance states that intangible assets may be included in the total net worth calculation, Exelon will exclude intangible assets from its total net worth calculation.

(iii)Tangible net worth of at least $21 million. Tangible net worth must be calculated to exclude all intangible assets and the net book value of the nuclear facility and site.

December 31, 2012 *..v, Tee to 10 K 21,730 (2,625)i*

Ties to 10-K (1 653)

Ties to 10-K (See Intangible Asset Detail)

(735)1

_,Provided by Siddarth Desau PlantAccounting 16.717 Yes (iv) Assets located in the United States amounting to at least 90 percent of the total assets or at least six times the current decommissioning cost estimates for the total of all facilities or parts thereof (or prescribed amount if a certification is used), or, for a power reactor licensee, at least six times the amount of decommissioning funds being assured by a parent company guarantee for the total of all reactor units or parts thereof.

December 31, 2012 Assets located in the Unites States 78,309 Meet criteria (YIN)?

The amount of decommissioning funds being assured by parent guarantee for the total of all reactor units or parts thereof Page 1 of 1 4

10 CFR 30, Appendix A, Required Independent Auditor's Report for Parent Company Guarantee

March 29, 2013 Exelon Corporation 10 South Dearborn Street Chicago, IL 60680

Dear Mr. Thayer:

Enclosed is our Report of Independent Accountants relating to the procedures we have performed, solely to assist you with evaluating the Exelon Corporation's compliance with the financial assurance regulations under Title 10, CFR, Part 30, Appendix A (II) (B) as of December 31, 2012, as detailed In the "Engagement Letter" dated March 6, 2013, including the "Schedule for the Financial Test" to be provided to the NRC with respect to the Limerick Unit 1 nuclear generating station.

Pursuant to the above regulations, the Company's accountant must evaluate the Company's off-balance sheet transactions, with such regulations indicating "It is important to understand the nature and the reason for each off-balance-sheet item and ensure that any such relationships are adequately disclosed." The illustrative auditor's report published by the U.S. Nuclear Regulatory Commission illustrates this being accomplished by the auditor providing an opinion on whether the off-balance sheet transactions could materially adversely affect the Company's ability to pay for decommissioning costs.

Specific to this requirement we note the following:

Accounting principles generally accepted In the United States of America (US GAAP), requires that all material off balance sheet obligations, commitments and contingencies are appropriately disclosed in the financial statements. As you know, we have previously audited the consolidated financial statements of Exelon Corporation and its subsidiaries for the years ending December 31, 2012 and rendered an unqualified opinion dated February 21, 2013, concluding that the financial statements were presented fairly, in all material respects, in conformity with US GAAP.

Pursuant to our professional standards as specified by the American Institute of Certified Public Accountants, we are unable to comment upon management's statement that the Company's off-balance sheet transactions do not materially adversely affect the Company's ability to satisfy its obligation under the parental guarantee for Limerick Unit I, due to the subjective nature of that statement. Because the term "material adverse effect" is not clearly defined in an accounting sense, and is therefore subject to varying Interpretations, potentially including legal interpretations, we are precluded from giving any form of assurance on this statement Very truly yours,

Report of Independent Accountants To the Board of Directors of Exelon Corporation We have performed the procedures enumerated below, which were agreed to by Exelon Corporation (Exelon) and the U.S Nuclear Regulatory Commission, solely to assist you in evaluating Exelon's compliance with the financial assurance regulations under Title 10, CFR, Part 30, Appendix A (II) (B) as of December 31, 2012, with respect to the accompanying NRC Regulation Appendix A to Part 30, Financial Test (Financial Test) prepared for the Limerick Unit 1 nuclear generating station. Exelon is responsible for the accompanying Financial Test and compliance with the NRC requirements. This agreed-upon procedures engagement was conducted in accordance with attestation standards established by the American Institute of Certified Public Accountants. The sufficiency of these procedures is solely the responsibility of those parties specified in this report. Consequently, we make no representation regarding the sufficiency of the procedures described below either for the purpose for which this report has been requested or for any other purpose.

Our procedures included agreeing amounts set forth in the accompanying Financial Test to the audited financial statements of Exelon as of December 31, 2012, re-performing calculations involving the amounts presented in the accompanying Financial Test, as well as inquiry of management.

The procedures performed with respect to the accompanying Financial Test and associated findings are as follows:

a)

We agreed the bond ratings in item (I) of the accompanying Financial Test to the credit rating for senior unsecured debt issued by the respective bond agencies referred to in item (I) according to their respective website as of March 11, 2013 without exception.

b)

We agreed amounts in items (ii) and (iii) identified as'Total Shareholders' Equity', "Goodwill",

and "Intangible Assets' as of December 31, 2012 to the December 31, 2012, audited financial statements of Exelon without exception.

c)

We agreed amounts In items (ii) and (iii) Identified as "Net Book Value of the Limerick Station" and the amount in item (iv) identified as 'Assets located in the United States' as of December 31, 2012 to the "property plant and equipment roll forward as of December 31, 2012" and the "Total Assets Held in U.S. as of December 31, 2012" internal schedules provided to us by management, respectively, without exception. We reconciled the 'Total Assets Held in U.S as of December 31, 2012" schedule in total to total assets on the face of the Balance Sheet per the audited consolidated financial statements of Exelon Corporation as of December 31, 2012 without exception.

d)

We recalculated the amount in item (ii) identified as "Total Net Worth" as being equal to 'otal Shareholders' Equity" less "Net Book Value of Limerick Station', without exception.

Additionally, we recalculated the ratio of "Total Net Worth" to the amount of decommissioning funds being assured by the Exelon parent guarantee for Limerick, Unit 1, and observed that

'Total Net Worth" is at least six times the amount of decommissioning funds being assured by the guarantee without exception.

We recalculated the amount in item (iii) identified as "Tangible Net Worth" as being equal to

'Total Shareholders' Equity" less "Goodwill," "Intangible Assets," and" Net Book Value of the Limerick Station", without exception. Additionally, we observed that 'Tangible Net Worth" of the Company is at least $21 million, without exception.

f)

We recalculated the ratio of "Assets located In the United States" to the amount of decommissioning funds being assured by the Exelon parent guarantee for Limerick, Unit 1, and observed that Total Assets located in the U.S is at least six times the amount of decommissioning funds being assured by the guarantee without exception.

g)

We inquired of management who have specific responsibility for Exelon Corporation's financial statements as filed in its Annual Report on Form 10-K, including the Executive Vice President and Chief Financial Officer and the Senior Vice President and Corporate Controller, whether all material off-balance sheet transactions requiring disclosure pursuant to accounting principles generally accepted in the United States of America and SEC reporting regulations have been included in the aforementioned financial statements. Management of Exelon Corporation responded that all material off balance sheet transactions have been disclosed in the Company's consolidated financial statements as filed in its Annual Report on Form 10-K.

h)

We inquired of management regarding whether any of the off balance sheet transactions referred to above, individually or in the aggregate, could materially adversely affect the ability of Exelon Corporation to satisfy its obligations under the parental guaranty for Limerick Unit I.

Management of Exelon Corporation responded that in their opinion, the disclosed off-balance sheet transactions, individually or in the aggregate, would not materially adversely affect Exelon Corporation's ability to satisfy its obligations under the parental guaranty.

We were not engaged to and did not conduct an examination, the objective of which would be the expression of an opinion on the information in the accompanying Financial Test or Exelon's compliance with the NRC requirements. Accordingly, we do not express such an opinion. Had we performed additional procedures, other matters might have come to our attention that would have been reported to you.

This report is intended solely for the information and use of Exelon and the U.S. Nuclear Regulatory Commission, and is not intended to be and should not be used by anyone other than these specified parties.

Chicago, Illinois March 29, 2013 L

(2) 5 Additional Information Regarding Parent Company Guarantee

The purpose of this document is to provide information to support and supplement the cover letter and Report of Independent Accountants provided to you by PricewaterhouseCoopers LLP ("PwC") in conjunction with Exelon Corporation's compliance with the financial assurance regulations under Title 10, CFR, Part 30, Appendix A (11) (B) as of December 31, 2012 ('"Limerick financial assurance tests"),

including the "Schedule for the Financial Test" to be provided to the NRC with respect to the Limerick Unit 1 nuclear generating station.

Pursuant to the discussion with the NRC on Wednesday, March 27 regarding our intended plans for demonstrating compliance with the aforementioned Limerick financial assurance tests, we are providing the supplemental information in this document to address the following inquiries made by the NRC during that discussion:

Can Exelon management explain the basis for its conclusion that the disclosed off-balance sheet transactions, either individually or in the aggregate, would not materially adversely affect Exelon's ability to satisfy its obligations under the Limerick Unit 1 nuclear generating station parental guarantee ("parental guarantee")?

What level of assurance can PwC provide regarding whether they have a sufficient basis for making and accepting the specific inquiries identified as items h) and i) in the Report of Independent Accountants?

With respect to the first item listed above, as described in PwC's Report of Independent Accountants, management of Exelon Corporation has concluded that the off-balance sheet transactions disclosed in Exelon's Annual Report on Form 10-K for the year ended December 31, 2012 ("2012 10-K"), either individually or in the aggregate, would not materially adversely affect Exelon Corporation's ability to satisfy its obligations under the parental guarantee.

In performing its analysis, management considered the following categories of off-balance sheet transactions as disclosed in the 2012 10-K:

a.

short-and long-term commitments to purchase energy, capacity and transmission rights from unaffiliated utilities and others; b.

electric supply procurement, curtailment services, renewable energy credit and alternative energy credit purchase commitments; c.

fuel purchase obligations; d.

other purchase obligations, which primarily represent commitments for services, materials and information technology; e.

construction commitments to acquire new assets or enhance existing assets; f.

minimum future operating lease payments, including lease payments for vehicles, real estate, computers, rail cars, operating equipment and office equipment; g.

the maximum exposure to loss associated with unconsolidated variable interest entities, including certain equity method investments, pledged assets, and other forms of subordinated financial support; h.

the net exposure for obligations under commercial transactions covered by energy marketing contract guarantees, which represents the total amount Exelon could be required to fund based on December 31, 2012 market prices; and i.

commercial and construction commitments made to the State of Maryland in conjunction with the Constellation merger.

Exelon has established a robust set of controls and procedures to ensure that the information related to material off-balance sheet transactions disclosed in the 10-K represents a complete and accurate population of transactions for presentation and disclosure in accordance with GAAP and SEC rules and regulations. These procedures include quarterly internal review and certification procedures performed 1

across multiple levels of management over the information to be disclosed, completion of checklists related to information required to be disclosed in SEC filings, and detailed review and approval processes related to the execution of new transactions. Exelon management relies upon these controls and procedures each reporting cycle to ensure that all information required to be disclosed in its SEC filings is complete, accurate and in compliance with the pertinent rules and regulations. Likewise, for purposes of the response to PwC's inquiry, Exelon management is relying upon these same controls and procedures to assert that all material off -balance sheet transactions have been appropriately disclosed in the Exelon Corporation 2012 Annual Report on Form 10-K.

After establishing comfort with the completeness of the disclosed off-balance sheet transactions, Exelon management evaluated its financial commitments under these transactions in light of its overall process for managing its sources of liquidity and access to capital. Exelon's financial priorities are to maintain investment grade credit metrics and to return value to Exelon's shareholders with a sustainable dividend throughout the energy commodity market cycle and through earnings growth from attractive investment opportunities. Exelon is committed to maintaining its current investment grade credit rating from the rating agencies by maintaining key credit metrics above target ranges under both market and stress conditions. In order to ensure this objective, Exelon routinely reviews the sufficiency of our liquidity position, including appropriate sizing of credit facility commitments, by performing various stress test scenarios, such as commodity price movements, increases in margin -related transactions, changes in hedging levels, and the impacts of hypothetical credit downgrades.

We also continuously monitor events in the financial markets and associated with the financial institutions associated with our credit facilities, including monitoring credit ratings and outlooks, credit default swap levels, capital raising and merger activity. As a result of these procedures, Exelon management believes that our future cash flows from operating activities, access to credit markets, and existing credit facilities provide sufficient liquidity to meet our financial commitments under all transactions, including, but not limited to, off-balance sheet transactions.

Further, in addressing the specific requirements under the Limerick financial assurance tests, Exelon management evaluated the potential impacts of the disclosed off-balance sheet transactions on each of the three tests as follows:

Management confirmed that the S&P and Moody's bond ratings are determined based on a comprehensive analysis of available financial information, including consideration of the material off-balance sheet transactions as disclosed in Exelon Corporation's Annual Report on Form 10-K.

Accordingly, the credit ratings arrived at by the agencies fully contemplate the existence and impact of the disclosed off-balance sheet transactions.

Management confirmed that the material disclosed off-balance sheet transactions would not impact the calculation that at least 90 percent of Exelon Corporation's total assets are located in the United States.

The commitments under many of the off-balance sheet transactions listed above pertain to either the acquisition of new assets or the operation of existing assets for the purpose of conducting its business activities. As in the past, such business activities are expected to produce total net positive earnings and cash flows for Exelon and, thus, would be accretive to Exelon's Total Net Worth and Tangible Net Worth calculations. Accordingly, Exelon management has concluded the following:

o The off-balance sheet transactions described above would not impact the Total Net Worth being at least six times the amount of decommissioning funds being assured by the guarantee.

o The off-balance sheet transactions described above would not impact the Tangible Net Worth being at least $21 million.

2

Finally, with respect to the second inquiry of the NRC described above and as noted by PwC in the cover letter to their Report of Independent Accounts, the professional auditing standards as specified by the American Institute of Certified Public Accountants, do not allow PwC to provide an opinion on management's statement that Exelon Corporation's off-balance sheet transactions do not materially adversely affect Exelon Corporation's ability to satisfy its obligation under the Limerick parental guarantee, due to the subjective nature of that statement. Because the term "material adverse effect" is not clearly defined in an accounting sense, and is therefore subject to varying interpretations, PwC is precluded under their professional standards from giving any form of assurance on this statement.

However, PwC has inquired as to management's opinion on this question, and Exelon management, based on the supporting and supplemental information provided in this document, has asserted that it does not believe the off-balance sheet transactions impact Exelon Corporation's ability to satisfy its obligation under the Limerick parental guarantee.

Approved by Jonathan W. Thayer, Executive Vice President and Chief Financial Officer March 29, 2013

RS-13-100, Report on Status of Decommissioning Funding for Reactors

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RS-13-100, Report on Status of Decommissioning Funding for Reactors

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