RS-17-045, Report on Status of Decommissioning Funding for Reactors and Independent Spent Fuel Storage Installations

Report on Status of Decommissioning Funding for Reactors and Independent Spent Fuel Storage Installations

ML17089A681
Person / Time
Site:	Calvert Cliffs, Dresden, Peach Bottom, Salem, Nine Mile Point, Oyster Creek, Byron, Three Mile Island, Braidwood, Limerick, Ginna, Clinton, Quad Cities, LaSalle, 07201036
Issue date:	03/30/2017
From:	Simpson P Exelon Generation Co
To:	Document Control Desk, Office of Nuclear Material Safety and Safeguards, Office of Nuclear Reactor Regulation
References
RS-17-045
Download: ML17089A681 (97)

Text

ExeLon Generation RS-17-045 10 CFR 50.75(f) 10 CFR 72.30(b)

March 30, 2017 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Braidwood Station, Units 1 and 2 Renewed Facility Operating License Nos. NPF-72 and NPF-77 NRC Docket Nos. STN 50-456, STN 50-457, and 72-73 Byron Station, Units 1 and 2 Renewed Facility Operating License Nos. NPF-37 and NPF-66 NRC Docket Nos. STN 50-454, STN 50-455, and 72-68 Calvert Cliffs Nuclear Power Plant, Units 1 and 2 Renewed Facility Operating License Nos. DPR-53 and DPR-69 NRC Docket Nos. STN 50-317 and STN 50-318 Clinton Power Station, Unit 1 Facility Operating License No. NPF-62 NRC Docket No. 50-461 and 72-1046 Dresden Nuclear Power Station, Units 1, 2 and 3 Facility Operating License No. DPR-2 Renewed Facility Operating License Nos. DPR-19 and DPR-25 NRC Docket Nos. 50-10, 50-237, 50-249, and 72-37 LaSalle County Station, Units 1 and 2 Renewed Facility Operating License Nos. NPF-11 and NPF-18 NRC Docket Nos. 50-373, 50-374, and 72-70 Limerick Generating Station, Units 1 and 2 Renewed Facility Operating License Nos. NPF-39 and NPF-85 NRC Docket Nos. 50-352, 50-353, and 72-65 Nine Mile Point Nuclear Station, Units 1 and 2 Renewed Facility Operating License Nos. DPR-63 and DPR-69 NRC Docket Nos. 50-220, 50-410, and 72-1036

March 30, 2017 U.S. Nuclear Regulatory Commission Page 2 Oyster Creek Nuclear Generating Station Renewed Facility Operating License No. DPR-16 NRC Docket No. 50-219 and 72-15 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, 50-278, and 72-29 Quad Cities Nuclear Power Station, Units 1 and 2 Renewed Facility Operating License Nos. DPR-29 and DPR-30 NRC Docket Nos. 50-254, 50-265, and 72-53 R.E. Ginna Nuclear Power Plant Renewed Facility Operating License No. DPR-18 NRC Docket Nos. 50-244 and 72-67 Salem Generating Station, Units 1 and 2 Renewed Facility Operating License Nos. DPR-70 and DPR-75 NRC Docket Nos. 50-272, 50-311, and 72-48 Three Mile Island Nuclear Station, Unit 1 Renewed Facility Operating License No. DPR-50 NRC Docket No. 50-289 Calvert Cliffs Nuclear Power Plant, Units 1 and 2 Independent Spent Fuel Storage Installation Materials License No. SNM-2505 NRC Docket No. 72-08

Subject:

Report on Status of Decommissioning Funding for Reactors and Independent Spent Fuel Storage Installations

References:

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

2. Letter from David M. Gullott (Exelon Generation Company, LLC) to U.S. NRC, "Proposed Independent Spent Fuel Storage Installation (ISFSI) Decommissioning Funding Plans for Clinton Power Station,"

dated September 6, 2016

3. Letter from Michael P. Gallagher (Exelon Generation Company, LLC) to U.S. NRC, "Withdrawal of Certification of Permanent Cessation of Power Operations for Clinton Power Station and Previously Submitted Licensing Actions in Support of Decommissioning," dated December 14, 2016

March 30, 2017 U.S. Nuclear Regulatory Commission Page 3 In accordance with 10 CFR 50.75, "Reporting and recordkeeping for decommissioning planning," paragraph (f), Exelon Generation Company, LLC (EGC) is submitting a report on the status of decommissioning funding for the reactors owned by EGC. Additionally, in accordance with 10 CFR 72.30, "Financial assurance and recordkeeping for decommissioning," EGC is submitting a report on the status of decommissioning funding for the independent spent fuel storage installations (ISFSls) owned by EGC. Updated decommissioning cost estimates for ISFSI decommissioning are provided in the attached report. With respect to the other information required by 10 CFR 72.30(b) and (c); there has been no change from the information provided in Reference 1.

The ISFSI decommissioning funding plan for Clinton Power Station (CPS) was provided in Reference 2. EGC acknowledged in Reference 2 that there was a decommissioning funding shortfall for the Clinton ISFSI and EGC would ensure adequate funding was provided for decommissioning of the ISFSI in the biennial decommissioning funding submittal. A decommissioning funding shortfall no longer exists and adequate funding assurance is provided to decommission both the site and the ISFSI. This change was primarily driven by EGC's reversal of its decision to shutdown CPS prior to the end of its licensed operating life as detailed in Reference 3 and the issuance of NUREG-1307 Revision 16, "Report on Waste Burial Charges." Attachment 30 contains changes to the CPS ISFSI decommissioning funding plan that was provided in Reference 2.

In accordance with 10 CFR 50.75(b)(4), 50.75(c), and 50.75(f), the estimated cost of decommissioning for financial assurance is based on either the NRC formula cost amount calculated in accordance with 10 CFR 50.75(c) or site-specific decommissioning cost estimates. If used in this report, the site-specific decommissioning cost estimates are based on a period of safe storage that is specifically described in the estimates. Site-specific cash flows from the site-specific cost estimates are included, as applicable. Unless otherwise noted, the specific cash flow analysis for the site-specific decommissioning cost estimates conservatively assumes all expenses in a year are incurred at the beginning of year (i.e.,

beginning of year convention) during the decommissioning period. The cash flow analysis for Peach Bottom Atomic Power Station (PBAPS), Unit 1 assumes that half of the current year contributions are included in the current year earnings to estimate payment of contributions throughout the year (i.e., a mid-year convention). EGC uses a mid-year convention in this instance because the contributions are made monthly at a constant rate throughout the year.

Nine Mile Point Nuclear Station, Unit 2 is co-owned by Nine Mile Point Nuclear Station, LLC (82%), an indirect EGC subsidiary, and Long Island Power Authority (LIPA) (18%). The information provided in this letter for Nine Mile Point Nuclear Station, Unit 2 includes summary statements provided and verified by LIPA.

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

EGC has not made a final determination of the decommissioning option 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 regulatory requirements. To the extent the site-specific cost estimates assume a decommissioning option; 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.

March 30, 2017 U.S. Nuclear Regulatory Commission Page 4 Due to increased costs, as reflected in the updated site-specific decommissioning cost estimate, PBAPS Unit 1 does not currently meet the minimum funding assurance criteria under 10 CFR 50.75 and 10 CFR 50.82 as of December 31, 2016, based solely on the trust fund balance. Financial assurance for decommissioning this reactor is provided by the external sinking fund method, coupled with an external trust fund, in accordance with 10 CFR 50.75(e)(1)(ii). The source of revenue for the external sinking fund is a "non-bypassable charge" approved by the Pennsylvania Public Utilities Commission (PaPUC) authorizing PECO Energy Company to continue to collect decommissioning funds for EGC.

The amount collected will be adjusted in accordance with the applicable tariff in the next filing of the Nuclear Decommissioning Cost Adjustment (NDCA) to the PaPUC to cover any funding shortfall that exists at that time. This cost adjustment is made every five years pursuant to PaPUC Electric Tariff No. 4. The next adjustment will be effective January 1, 2018. The PaPUC has been notified that the amount collected may need to be adjusted in the next filing. EGC's ability to adjust the amount collected for PBAPS Unit 1 is consistent with the guidance in Regulatory Guide 1.159, "Assuring Availability of Funds for Decommissioning Nuclear Reactors," Revision 2 which provides that, "Adjustments to the annual amount of funds being set aside may be made to coincide with rate cases considered by a licensee's public utility commission (PUC)."

There were no disbursements through December 31, 2016 from the decommissioning trust funds since the last report, other than those for allowed administrative costs and other incidental expenses of the fund in connection with the operation of the fund in accordance with 10 CFR 50.75(h)(1)(iv).

There are no regulatory commitments contained within this letter.

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

Re Nectfully,

~ 4fZJL .

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Patrick R. Simpson Manager Licensing Exelon Generation Company, LLC

March 30, 2017 U.S. Nuclear Regulatory Commission Page 5 cc: Regional Administrator NRC Region I Regional Administrator NRC Region III NRC Senior Resident Inspector Braidwood Station NRC Senior Resident Inspector Byron Station NRC Senior Resident Inspector Calvert Cliffs Nuclear Power Plant NRC Senior Resident Inspector Clinton Power Station NRC Senior Resident Inspector Dresden Nuclear Power Station NRC Senior Resident Inspector LaSalle County Station NRC Senior Resident Inspector Limerick Generating Station NRC Senior Resident Inspector Nine Mile Point Nuclear 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 NRC Senior Resident Inspector R.E. Ginna Nuclear Power Plant NRC Senior Resident Inspector Salem Generating Station NRC Senior Resident Inspector Three Mile Island Nuclear Station Attachments:

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

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

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

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

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

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

7. Annual Radiological Decommissioning Funding Assurance Report for Calvert Cliffs Nuclear Power Plant, Unit 2 S. Annual Radiological Decommissioning Funding Assurance Report for Clinton Power Station, Unit 1

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

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

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

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

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

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

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

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

March 30, 2017 U.S. Nuclear Regulatory Commission Page 6

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

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

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

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

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

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

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

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

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

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

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

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

29. ISFSI Decommissioning Funding Estimates

30. Changes to the Proposed ISFSI Decommissioning Funding Plans for Clinton Power Station

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

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

The labor, energy, and burial indexes used are consistent with those described in NUREG-1307, Revision 16, issued March 2017.

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

Specifically, EGC used the Employment Cost Index for total compensation for private industry workers by region. The labor adjustment factors were calculated according to Section 3.2 of NUREG-1307, Revision 16, using fourth quarter 2016 data. Table 1 shows the data used for this calculation.

Table 1: Labor Adjustment Factors 4Q2016 Base Labor Index LX Adjustment Legion Applicable Sites Series ID Dumber Factor (LX )

Northeast Limerick CIU20100000002101 128.7 2.16 2.780 Nine Mile Point Oyster Creek Peach Bottom R.E. Ginna Salem TMI South Calvert Cliffs CIU20100000002201 126.2 1.98 2.499 Midwest Braidwood CIU20100000002301 125.7 2.08 2.615 Byron Clinton Dresden LaSalle Quad Cities The current energy cost indexes 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 3.3 of NUREG-1307, Revision 16, using December 2016 data. Table 2 shows the data used for this calculation.

Table 2: Energy Adjustment Factors WPU0543 January 1986 (base value) 114.2 WPU0573 January 1986 base value) 82.0 WPU0543 December 2016 (preliminary value) 215.0 WPU0573 December 2016(preliminary value 152.0 Industrial electric power adjustment factor - P X 1.883 Lr ht fuel oil adjustment factor - F X 1.854 Energy Adjustment Factor PWR E X PWR 1.870

-nergy Adjustment Factor (BWR) EX(BWR) 1.869 Page 1 of 2

ATTACHMENT 1 (Continued)

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

The waste burial adjustment factors used are taken from Table 2-1 of NUREG-1307, Revision 16, based on 2016 data. The adjustment factors EGC used assume a combination of compact-affiliated and non-compact facilities for sites affiliated with a compact. This is consistent with current waste disposal practices at EGC and consistent with typical waste disposal practices during decommissioning. For sites not affiliated with a compact, the values for generators located in unaffiliated states were used. Table 3 summarizes the data used for the calculation of the waste adjustment factors.

Table 3: Waste Adjustment Factors Combination of Generators Located Reactor Applicable Compact- in the Unaffiliated LLW Burial Site Type Site Affiliated and States and those Non-Compact Located in Disposal Compact-Affiliated Facilities Waste States having no Adjustment Disposal Facility Factor (BJ Waste Adjustment Factor (B,)

South Carolina site BWR Oyster Creek 12.111 N/A Atlantic Compact South Carolina site PWR Salem 10.971 N/A Atlantic Compact Generic LLW BWR Clinton N/A 13.132 Disposal Site Dresden LaSalle Limerick Nine Mile Point Peach Bottom Quad Cities Generic LLW PWR Braidwood N/A 12.471 Disposal Site Byron Calvert Cliffs R.E. Ginna TMI The calculation methodology used for all adjustment factors is consistent with NUREG-1307, Revision 16.

Page 2 of 2

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

ATTACHMENT 2 Annual Radiological Decommissioning Funding Assurance Report for Sraidwood Station, Unit 1 (December 31, 2016 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c) $ 492,056 2 Site-specific cost amount per 10 CFR 50.75(b)(4) N/A 3 Site-specific cost amount per 10 CFR 72.30(b) $4,870 (a) 4 The amount of decommissioning trust funds accumulated as of December 31, 2016 $ 322,022 (b) 5 Schedule of the annual amounts remaining to be collected. $0 6 Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (c) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

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

9 Effective February 28, 2017, EGC changed the corporate structure of its subsidiary companies through which the non-qualified decommissioning trust fund is managed and controlled. No change was made to the non-qualified trust agreement or to its master terms and conditions. This change was detailed in letter from Patrick R. Simpson (Exelon Generation Company, LLC) to U.S.

NRC, "Notice of Merger of Subsidiary ""'Non-Qualified Nuclear Decommissioning Trust' Entities into their Parent Company," dated December 22, 2016.

(a) The site-specific decommissioning funding plan was previously provided in a letter from Patrick R. Simpson (EGC) to U.S. NRC, dated February 4, 2016 ("Report on Status of Decommissioning Funding for Braidwood Station, Units 1 and 2 and Byron Station, Unit 2"). The costs have been escalated from mid-year 2014 dollars in the cost estimate to December 31, 2016 using a unit specific escalation rate. No other changes have been made to the decommissioning funding plan in the February 4, 2016 letter.

Page 1 of 2

ATTACHMENT 2 (Continued)

Annual Radiological Decommissioning Funding Assurance Report for Rraidwood Station, Unit 1 (December 31, 2016 dollars, thousands)

(b) The trust fund amount is the amount allocated for Radiological Decommissioning only. EGC has no past-due tax payments related to decommissioning trust fund activities as of December 31, 2016. Periodic payments of estimated income taxes are made during the year on a quarterly basis. The trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2016.

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

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

Page 2of2

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

ATTACHMENT 3 Annual Radiological Decommissioning Funding Assurance Report for Braidwood Station, Unit 2 (December 31, 2016 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c) $492,056 2 Site-specific cost amount per 10 CFR 50.75(b)(4) N/A 3 Site-specific cost amount per 10 CFR 72.30(b) $4,879 (a) 4 The amount of decommissioning trust funds accumulated as of December 31, 2016 $348,139 (b) 5 Schedule of the annual amounts remaining to be collected. $0 6 Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (c) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

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

9 Effective February 28, 2017, EGC changed the corporate structure of its subsidiary companies through which the non-qualified decommissioning trust fund is managed and controlled. No change was made to the non-qualified trust agreement or to its master terms and conditions. This change was detailed in letter from Patrick R. Simpson (Exelon Generation Company, LLC) to U.S.

NRC, "Notice of Merger of Subsidiary ""'Non-Qualified Nuclear Decommissioning Trust' Entities into their Parent Company," dated December 22, 2016.

(a) The site-specific decommissioning funding plan was previously provided in a letter from Patrick R. Simpson (EGC) to U.S. NRC, dated February 4, 2016 ("Report on Status of Decommissioning Funding for Braidwood Station, Units 1 and 2 and Byron Station, Unit 2"). The costs have been escalated from mid-year 2014 dollars in the cost estimate to December 31, 2016 using a unit specific escalation rate. No other changes have been made to the decommissioning funding plan in the February 4, 2016 letter.

Page 1 of 2

ATTACHMENT 3 (Continued)

Annual Radiological Decommissioning Funding Assurance Report for IBraidwood Station, Unit 2 (December 31, 2016 dollars, thousands)

(b) The trust fund amount is the amount allocated for Radiological Decommissioning only. EGC has no past-due tax payments related to decommissioning trust fund activities as of December 31, 2016. Periodic payments of estimated income taxes are made during the year on a quarterly basis. The trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2016.

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

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

Page 2of2

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

ATTACHMENT 4 Annual Radiological Decommissioning Funding Assurance Report for Byron Station, Unit 1 (December 31, 2016 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c) $492,056 2 Site-specific cost amount per 10 CFR 50.75(b)(4) N/A 3 Site-specific cost amount per 10 CFR 72.30(b) $4,739 (a) 4 The amount of decommissioning trust funds accumulated as of December 31, 2016 $353,618 (b) 5 Schedule of the annual amounts remaining to be collected. $0 6 Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (c) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

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

9 Effective February 28, 2017, EGC changed the corporate structure of its subsidiary companies through which the non-qualified decommissioning trust fund is managed and controlled. No change was made to the non-qualified trust agreement or to its master terms and conditions. This change was detailed in letter from Patrick R. Simpson (Exelon Generation Company, LLC) to U.S.

NRC, "Notice of Merger of Subsidiary ""'Non-Qualified Nuclear Decommissioning Trust' Entities into their Parent Company," dated December 22, 2016.

(a) The site-specific decommissioning funding plan was previously provided in a letter from Patrick R. Simpson (EGC) to U.S. NRC, dated March 31, 2015 ("Report on Status of Decommissioning Funding for Reactors and Independent Spent Fuel Storage Installations"). The costs have been escalated from mid-year 2014 dollars in the cost estimate to December 31, 2016 using a unit specific escalation rate. No other changes have been made to the decommissioning funding plan in the March 31, 2015 letter.

Page 1 of 2

ATTACHMENT 4 (Continued)

Annual Radiological Decommissioning Funding Assurance Report for (Byron Station, Unit 1 (December 31, 2016 dollars, thousands)

(b) The trust fund amount is the amount allocated for Radiological Decommissioning only. EGC has no past-due tax payments related to decommissioning trust fund activities as of December 31, 2016. Periodic payments of estimated income taxes are made during the year on a quarterly basis. The trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2016.

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

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

Page 2 of 2

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

ATTACHMENT 5 Annual Radiological Decommissioning Funding Assurance Report for Byron Station, Unit 2 (December 31, 2016 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c) $492,056 2 Site-specific cost amount per 10 CFR 50.75(b)(4) N/A 3 Site-specific cost amount per 10 CFR 72.30(b) $4,747(a) 4 The amount of decommissioning trust funds accumulated as of December 31, 2016 $340,758 (b) 5 Schedule of the annual amounts remaining to be collected. $0 6 Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (c) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

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

9 Effective February 28, 2017, EGC changed the corporate structure of its subsidiary companies through which the non-qualified decommissioning trust fund is managed and controlled. No change was made to the non-qualified trust agreement or to its master terms and conditions. This change was detailed in letter from Patrick R. Simpson (Exelon Generation Company, LLC) to U.S.

NRC, "Notice of Merger of Subsidiary ""'Non-Qualified Nuclear Decommissioning Trust' Entities into their Parent Company," dated December 22, 2016.

(a) The site-specific decommissioning funding plan was previously provided in a letter from Patrick R. Simpson (EGC) to U.S. NRC, dated February 4, 2016 ("Report on Status of Decommissioning Funding for Braidwood Station, Units 1 and 2 and Byron Station, Unit 2"). The costs have been escalated from mid-year 2014 dollars in the cost estimate to December 31, 2016 using a unit specific escalation. No other changes have been made to the decommissioning funding plan in the February 4, 2016 letter.

Page 1 of 2

ATTACHMENT 5 (Continued)

Annual Radiological Decommissioning Funding Assurance Report for Byron Station, Unit 2 (December 31, 2016 dollars, thousands)

(b) The trust fund amount is the amount allocated for Radiological Decommissioning only. EGC has no past-due tax payments related to decommissioning trust fund activities as of December 31, 2016. Periodic payments of estimated income taxes are made during the year on a quarterly basis. The trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2016.

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

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

Page 2of2

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

ATTACHMENT 6 Annual Radiological Decommissioning Funding Assurance Report for Calvert Cliffs Nuclear Power Plant, Unit 1 (December 31, 2016 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c) $456,881 2 Site-specific cost amount per 10 CFR 50.75(b)(4) N/A 3 Site-specific cost amount per 10 CFR 72.30(b) $5,053 (a) 4 The amount of decommissioning trust funds accumulated as of December 31, 2016 $358,696 (b) 5 Schedule of the annual amounts remaining to be collected. $0 6 Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (c) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

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

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

(a) The site-specific decommissioning funding plan was previously provided in a letter from Patrick R. Simpson (EGC) to U.S. NRC, dated March 31, 2015 ("Report on Status of Decommissioning Funding for Reactors and Independent Spent Fuel Storage Installations"). The site-specific cost estimate for ISFSI radiological decommissioning contained in this letter has been updated. The detailed site-specific cost estimate for ISFSI radiological decommissioning is provided in Attachment 29. The costs have been escalated and provided in December 31, 2016 dollars using a site specific escalation rate. No other changes have been made to the decommissioning funding plan in the March 31, 2015 letter.

(b) The trust fund amount is the amount allocated for Radiological Decommissioning only. EGC has no past-due tax payments related to decommissioning trust fund activities as of December 31, 2016. Periodic payments of estimated income taxes are made during the year on a quarterly basis. The trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2016.

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

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

Page 1 of 1

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

ATTACHMENT 7 Annual Radiological Decommissioning Funding Assurance Report for Calvert Cliffs Nuclear Power Plant, Unit 2 (December 31, 2016 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c) $456,881 2 Site-specific cost amount per 10 CFR 50.75(b)(4) N/A 3 Site-specific cost amount per 10 CFR 72.30(b) $5,062 (a) 4 The amount of decommissioning trust funds accumulated as of December 31, 2016 $459,606 (b) 5 Schedule of the annual amounts remaining to be collected. $0 6 Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (c) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

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

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

(a) The site-specific decommissioning funding plan was previously provided in a letter from Patrick R. Simpson (EGC) to U.S. NRC, dated March 31, 2015 ("Report on Status of Decommissioning Funding for Reactors and Independent Spent Fuel Storage Installations"). The site-specific cost estimate for ISFSI radiological decommissioning contained in this letter has been updated. The detailed site-specific cost estimate for ISFSI radiological decommissioning is provided in Attachment 29. The costs have been escalated and provided in December 31, 2016 dollars using a site specific escalation rate. No other changes have been made to the decommissioning funding plan in the March 31, 2015 letter.

(b) The trust fund amount is the amount allocated for Radiological Decommissioning only. EGC has no past-due tax payments related to decommissioning trust fund activities as of December 31, 2016. Periodic payments of estimated income taxes are made during the year on a quarterly basis. The trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2016.

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

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

Page 1 of 1

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

ATTACHMENT 8 Annual Radiological Decommissioning Funding Assurance Report for Clinton Power Station, Unit 1 (December 31, 2016 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c) $652,255 2 Site-specific cost amount per 10 CFR 50.75(b)(4) N/A 3 Site-specific cost amount per 10 CFR 72.30(b) $5,500 (a) 4 The amount of decommissioning trust funds accumulated as of December 31, 2016 $513,387 (b) 5 Schedule of the annual amounts remaining to be collected. $0 6 Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (c) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

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

9 Effective February 28, 2017, EGC changed the corporate structure of its subsidiary companies through which the non-qualified decommissioning trust fund is managed and controlled. No change was made to the non-qualified trust agreement or to its master terms and conditions. This change was detailed in letter from Patrick R. Simpson (Exelon Generation Company, LLC) to U.S.

NRC, "Notice of Merger of Subsidiary ""'Non-Qualified Nuclear Decommissioning Trust' Entities into their Parent Company," dated December 22, 2016.

(a) The site-specific decommissioning funding plan was previously provided in a letter from David M. Gullott (EGC) to U.S. NRC, dated September 6, 2016 ("Proposed Independent Spent Fuel Storage Installation (ISFSI) Decommissioning Funding Plans for Clinton Power Station"). The costs have been escalated to December 31, 2016 using a unit specific escalation rate. Attachment 30 provides changes that have been made to the decommissioning funding plan from the September 6, 2016 letter.

(b) The trust fund amount is the amount allocated for Radiological Decommissioning only. EGC has no past-due tax payments related to decommissioning trust fund activities as of December 31, 2016. Periodic payments of estimated income taxes are made during the year on a quarterly basis. The trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2016.

(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 1

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

ATTACHMENT 9 Annual Radiological Decommissioning Funding Assurance and Spent Fuel Management Report for Dresden Nuclear Power Station, Unit 1 (December 31, 2016 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c) N/A (a) 2 Site-specific cost amount per 10 CFR 50.75(b)(4) and 50.75(f) $405,539 (a) 3 Site-specific cost amount per 10 CFR 72.30(b) N/A(b) 4 The amount of decommissioning trust funds accumulated as of December 31, 2016 $372,178 (c) 5 Schedule of the annual amounts remaining to be collected. $0 6 Assumptions used regarding rates of escalation for decommissioning costs, earnings on funds, and other factors used in funding projections 2% (d) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

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

9 Effective February 28, 2017, EGC changed the corporate structure of its subsidiary companies through which the non-qualified decommissioning trust fund is managed and controlled. No change was made to the non-qualified trust agreement or to its master terms and conditions. This change was detailed in letter from Patrick R. Simpson (Exelon Generation Company, LLC) to U.S. NRC, "Notice of Merger of Subsidiary ""'Non-Qualified Nuclear Decommissioning Trust' Entities into their Parent Company," dated December 22, 2016.

10 2016 annual amount spent on decommissioning in $3,278 (e) accordance with 10 CFR 50.82(a)(8)(v)(A).

11 Cumulative amount spent on decommissioning in $120,735 (f) accordance with 10 CFR 50.82(a)(8)(v)(A).

Reimbursed from the decommissioning trust fund $86,848 (g)

Not yet reimbursed from the decommissioning trust $33,888 (h) fund 12 Amount of funds accumulated to cover the cost of $13,699 managing irradiated fuel pursuant to 10 CFR 50.82(a)(8)(vii)(A) as of December 31, 2016.

13 Projected cost of managing irradiated fuel based on $15,050(a) site-specific estimate per 10 CFR 50.82(a)(8)(vii)(B).

Page 1 of 5

ATTACHMENT 9 (Continued)

Annual Radiological Decommissioning Funding Assurance and Spent Fuel Management Report for Dresden Nuclear Power Station, Unit 1 (December 31, 2016 dollars, thousands)

(a) A formula cost amount using the formula in 10 CFR 50.75(c) is not applicable because Dresden Unit 1 has been shutdown since October 31, 1978 and some decommissioning activities have already occurred on this unit. However, the amount to decommission Dresden Unit 1 was calculated pursuant to 10 CFR 50.75(c) to be

$554.7 million (as of December 31, 2016). Dresden Unit 1 was a BWR reactor that operated at a maximum power level of 700 MWt (< 1200 MWt as specified in 10 CFR 50.75(c)). This amount assumes Dresden Unit 1 was a BWR reactor type rated at a power capacity of 1200 IVIWt as required by the formula in 10 CFR 50.75(c). The calculation of this value assumes the labor, energy, and burial factors described in Attachment 1 and does not account for decommissioning activities that have occurred for Dresden Unit 1.

In accordance with the regulatory requirements, the site-specific amount is reported per 10 CFR 50.75(b)(4), 50.75(f), 50.82(a)(8)(iii), and 50.82(a)(8)(v)(B) and assumes a DECON scenario as described in the site-specific cost estimate (SSCE) (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, Post-Shutdown Decommissioning Activities Report (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 dollars reflected in the 2012 decommissioning cost estimate to estimated costs as of December 31, 2016.

Decommissioning expenditures prior to the year the SSCE updates were prepared (historical expenditures) are not included in the estimated total cost of decommissioning in the final SSCE reports. Also, the amount reported does not include cash flows from the SSCE estimate for the 2012 thru 2016 annual radiological cost because EGC considers the SSCE estimated cost for 2012 thru 2016 decommissioning activities to be historical expenditures at the time the 2017 decommissioning funding assurance report is generated.

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) ISFSI decommissioning cost is included in the Dresden Nuclear Power Station, Unit 2 and Unit 3 site-specific cost estimates.

?age 2 of 5

ATTACHMENT 9 (Continued)

Annual Radiological Decommissioning Funding Assurance and Spent Fuel Management Report for Dresden Nuclear Power Station, Unit 1 (December 31, 2016 dollars, thousands)

(c) The trust fund amount is the amount allocated for Radiological Decommissioning only. EGC has no past-due tax payments related to decommissioning trust fund activities as of December 31, 2016. Periodic payments of estimated income taxes are made during the year on a quarterly basis. The trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2016.

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

(e) The amount spent on decommissioning in 2016 is consistent with the projected 2016 expense total of $3,094 (December 31, 2015 thousands of dollars) from the site-specific cost estimate.

The amount spent on decommissioning in 2016 represents the 2016 charges to the Dresden Unit 1 project. Prior to reimbursement from the decommissioning trust fund, these charges will be validated to confirm they are legitimate decommissioning expenses. Consequently, the amount reimbursed may differ from the value provided.

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

(g) Not all historical data was available, and therefore, the amount reimbursed is an estimate based on the best information obtainable at this time.

(h) The amount not yet reimbursed is an estimate based on the best information obtainable at this time.

Page 3 of 5

ATTACHMENT 9 (Continued)

Annual Radiological Decommissioning Funding Assurance and Spent Fuel Management Report for Dresden Nuclear Power Station, Unit 1 (December 31, 2016 dollars, thousands)

BOY BOY EOY Radiological Trust Trust Fund Trust Trust Decommissioning Fund Value Fund Fund Year Cost Value Less Cost Earnings Value 2017 $3,131 $372,178 $369,048 $7,381 $376,429 2018 $3,131 $376,429 $373,298 $7,466 $380,764 2019 $3,131 $380,764 $377,633 $7,553 $385,186 2020 $3,139 $385,186 $382,046 $7,641 $389,687 2021 $3,131 $389,687 $386,557 $7,731 $394,288 2022 $3,131 $394,288 $391,157 $7,823 $398,980 2023 $3,131 $398,980 $395,849 $7,917 $403,766 2024 $3,139 $403,766 $400,627 $8,013 $408,640 2025 $3,131 $408,640 $405,509 $8,110 $413,619 2026 $3,131 $413,619 $410,488 $8,210 $418,698 2027 $3,131 $418,698 $415,567 $8,311 $423,879 2028 $3,139 $423,879 $420,739 $8,415 $429,154 2029 $39,359 $429,154 $389,795 $7,796 $397,591 2030 $83,706 $397,591 $313,885 $6,278 $320,162 2031 $90,985 $320,162 $229,177 $4,584 $233,761 2032 $66,229 $233,761 $167,531 $3,351 $170,882 2033 $49,809 $170,882 $121,073 $2,421 $123,494 2034 $2,314 $123,494 $121,180 $2,424 $123,604 2035 $2,314 $123,604 $121,290 $2,426 $123,715 2036 $2,320 $123,715 $121,395 $2,428 $123,823 2037 $18,829 $123,823 $104,994 $2,100 $107,094 2038 $6,864 $107,094 $100,230 $2,005 $102,234 2039 $95 $102,234 $102,139 $2,043 $104,182 2040 $54 $104,182 $104,128 $2,083 $106,210 2041 $0 $106,210 $106,210 $2,124 $108,335 2042 $5,064 $108,335 $103,270 $2,065 $105,336 Total* $405,539

• Column may not add due to rounding Page 4of5

ATTACHMENT 9 (Continued)

Annual Radiological Decommissioning Funding Assurance and Spent Fuel Management Report for Dresden Nuclear Power Station, Unit 1 (December 31, 2016 dollars, thousands)

BOY BOY EOY Irradiated Irradiated Irradiated Irradiated Irradiated Fuel Fuel Fuel Fuel Fuel Trust Fund Trust Fund Trust Fund Trust Fund Year Cost Value Less Cost Earnings Value 2017 $0 $13,699 $13,699 $274 $13,973 2018 $0 $13,973 $13,973 $279 $14,252 2019 $0 $14,252 $14,252 $285 $14,537 2020 $0 $14,537 $14,537 $291 $14,828 2021 $0 $14,828 $14,828 $297 $15,124 2022 $0 $15,124 $15,124 $302 $15,427 2023 $0 $15,427 $15,427 $309 $15,735 2024 $0 $15,735 $15,735 $315 $16,050 2025 $0 $16,050 $16,050 $321 $16,371 2026 $0 $16,371 $16,371 $327 $16,699 2027 $0 $16,699 $16,699 $334 $17,033 2028 $0 $17,033 $17,033 $341 $17,373 2029 $842 $17,373 $16,531 $331 $16,862 2030 $600 $16,862 $16,261 $325 $16,586 2031 $516 $16,586 $16,071 $321 $16,392 2032 $517 $16,392 $15,875 $318 $16,193 2033 $516 $16,193 $15,677 $314 $15,991 2034 $516 $15,991 $15,475 $310 $15,785 2035 $516 $15,785 $15,269 $305 $15,574 2036 $517 $15,574 $15,057 $301 $15,358 2037 $2,075 $15,358 $13,284 $266 $13,549 2038 $705 $13,549 $12,844 $257 $13,101 2039 $755 $13,101 $12,346 $247 $12,593 2040 $1,501 $12,593 $11,092 $222 $11,314 2041 $2,451 $11,314 $8,863 $177 $9,040 2042 $2,448 $9,040 $6,592 $132 $6,724 2043 $576 $6,724 $6,148 $123 $6,271 Total* $15,050

• Column may not add due to rounding Page 5 of 5

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

Alf ACHNIEliiNlY 10 Annual Radiological Decommissioning Funding Assurance Reporit for Dresden Nuclear Power Sitaitilon, Unit 2 (December 31, 2016 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c) $631,059 2 Site-specific cost amount per 10 CFR 50.75(b)(4) N/A 3 Site-specific cost amount per 10 CFR 72.30(b) $2,355 (a) 4 The amount of decommissioning trust funds accumulated as of December 31, 2016 $651,199 (b) 5 Schedule of the annual amounts remaining to be collected. $0 6 Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (c) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

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

9 Effective February 28, 2017, EGC changed the corporate structure of its subsidiary companies through which the non-qualified decommissioning trust fund is managed and controlled. No change was made to the non-qualified trust agreement or to its master terms and conditions. This change was detailed in letter from Patrick R. Simpson (Exelon Generation Company, LLC) to U.S.

NRC, "Notice of Merger of Subsidiary ""'Non-Qualified Nuclear Decommissioning Trust' Entities into their Parent Company," dated December 22, 2016.

(a) This is the site-specific cost estimate for ISFSI radiological decommissioning that was previously provided in a letter from Patrick R. Simpson (EGC) to U.S. NRC, dated December 17, 2012 ("Proposed Independent Spent Fuel Storage Installation (ISFSI) Decommissioning Funding Plans for Braidwood, Byron, Dresden, LaSalle, Limerick, Oyster Creek, Peach Bottom, Quad Cities, and Salem"). The costs have been escalated from 2012 dollars in the cost estimate to December 31, 2016 using a unit specific escalation rate. No other changes have been made to the decommissioning funding plan in the March 31, 2015 letter.

(b) The trust fund amount is the amount allocated for Radiological Decommissioning only. EGC has no past-due tax payments related to decommissioning trust fund activities as of December 31, 2016. Periodic payments of estimated income taxes are made during the year on a quarterly basis. The trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2016.

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

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

Page 1 of 1

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

ATTACHWENT I I Aninua~ Ra6olloguca0 Decomrrnu ssoono ng Fur 6ng Assurance Repor~ for Dresden N uc~ear Power S~aUon, Una t 3 (December 31, 2016 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c) $631,059 2 Site-specific cost amount per 10 CFR 50.75(b)(4) N/A 3 Site-specific cost amount per 10 CFR 72.30(b) $2,356 (a) 4 The amount of decommissioning trust funds accumulated as of December 31, 2016 $665,882 (b) 5 Schedule of the annual amounts remaining to be collected. $0 6 Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (c) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

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

9 Effective February 28, 2017, EGC changed the corporate structure of its subsidiary companies through which the non-qualified decommissioning trust fund is managed and controlled. No change was made to the non-qualified trust agreement or to its master terms and conditions. This change was detailed in letter from Patrick R. Simpson (Exelon Generation Company, LLC) to U.S.

NRC, "Notice of Merger of Subsidiary ""'Non-Qualified Nuclear Decommissioning Trust' Entities into their Parent Company," dated December 22, 2016.

(a) This is the site-specific cost estimate for ISFSI radiological decommissioning that was previously provided in a letter from Patrick R. Simpson (EGC) to U.S. NRC, dated December 17, 2012 ("Proposed Independent Spent Fuel Storage Installation (ISFSI) Decommissioning Funding Plans for Braidwood, Byron, Dresden, LaSalle, Limerick, Oyster Creek, Peach Bottom, Quad Cities, and Salem"). The costs have been escalated from 2012 dollars in the cost estimate to December 31, 2016 using a unit specific escalation rate. No other changes have been made to the decommissioning funding plan in the March 31, 2015 letter.

(b) The trust fund amount is the amount allocated for Radiological Decommissioning only. EGC has no past-due tax payments related to decommissioning trust fund activities as of December 31, 2016. Periodic payments of estimated income taxes are made during the year on a quarterly basis. The trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2016.

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

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

?age 1 of 1

Attachment 12 Annual Radiological Decommissioning Funding Assurance Report for LaSalle County Station, Unit 1

ATTACHMENT 12 Annual Radiological Decommissioning Funding Assurance Report for LaSalle County Station, Unit 1 (December 31, 2016 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c) $652,255 2 Site-specific cost amount per 10 CFR 50.75(b)(4) N/A 3 Site-specific cost amount per 10 CFR 72.30(b) $6,423 (a) 4 The amount of decommissioning trust funds accumulated as of December 31, 2016 $476,685 (b) 5 Schedule of the annual amounts remaining to be collected. $0 6 Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (c) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

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

9 Effective February 28, 2017, EGC changed the corporate structure of its subsidiary companies through which the non-qualified decommissioning trust fund is managed and controlled. No change was made to the non-qualified trust agreement or to its master terms and conditions. This change was detailed in letter from Patrick R. Simpson (Exelon Generation Company, LLC) to U.S.

NRC, "Notice of Merger of Subsidiary ""'Non-Qualified Nuclear Decommissioning Trust' Entities into their Parent Company," dated December 22, 2016.

(a) The site-specific decommissioning funding plan was previously provided in a letter from Patrick R. Simpson (EGC) to U.S. NRC, dated March 31, 2015 ("Report on Status of Decommissioning Funding for Reactors and Independent Spent Fuel Storage Installations"). The costs have been escalated from mid-year 2014 dollars in the cost estimate to December 31, 2016 using a unit specific escalation rate. No other changes have been made to the decommissioning funding plan in the March 31, 2015 letter.

Page 1 of 2

ATTACHMENT 12 (Continued)

Annual Radiological Decommissioning Funding Assurance Report for LaSalle County Station, Unit 1 (December 31, 2016 dollars, thousands)

(b) The trust fund amount is the amount allocated for Radiological Decommissioning only. EGC has no past-due tax payments related to decommissioning trust fund activities as of December 31, 2016. Periodic payments of estimated income taxes are made during the year on a quarterly basis. The trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2016.

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

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

Page 2of2

Attachment 13 Annual Radiological Decommissioning Funding Assurance Report for LaSalle County Station, Unit 2

ATTACHMENT 13 Annual Radiological Decommissioning Funding Assurance Report for LaSalle County Station, Unit 2 (December 31, 2016 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c) $652,255 2 Site-specific cost amount per 10 CFR 50.75(b)(4) N/A 3 Site-specific cost amount per 10 CFR 72.30(b) $6,429 (a) 4 The amount of decommissioning trust funds accumulated as of December 31, 2016 $477,242 (b) 5 Schedule of the annual amounts remaining to be collected. $0 6 Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (c) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

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

9 Effective February 28, 2017, EGC changed the corporate structure of its subsidiary companies through which the non-qualified decommissioning trust fund is managed and controlled. No change was made to the non-qualified trust agreement or to its master terms and conditions. This change was detailed in letter from Patrick R. Simpson (Exelon Generation Company, LLC) to U.S.

NRC, "Notice of Merger of Subsidiary ""'Non-Qualified Nuclear Decommissioning Trust' Entities into their Parent Company," dated December 22, 2016.

(a) The site-specific decommissioning funding plan was previously provided in a letter from Patrick R. Simpson (EGC) to U.S. NRC, dated March 31, 2015 ("Report on Status of Decommissioning Funding for Reactors and Independent Spent Fuel Storage Installations"). The costs have been escalated from mid-year 2014 dollars in the cost estimate to December 31, 2016 using a unit specific escalation rate. No other changes have been made to the decommissioning funding plan in the March 31, 2015 letter.

Page 1 of 2

ATTACHMENT 13 (Continued)

Annual Radiological Decommissioning Funding Assurance Report for LaSalle County Station, Unit 2 (December 31, 2016 dollars, thousands)

(b) The trust fund amount is the amount allocated for Radiological Decommissioning only. EGC has no past-due tax payments related to decommissioning trust fund activities as of December 31, 2016. Periodic payments of estimated income taxes are made during the year on a quarterly basis. The trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2016.

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

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

Page 2 of 2

Attachment 14 Annual Radiological Decommissioning Funding Assurance Report for Limerick Generating Station, Unit 1

ATTACHMENT 14 Annual Radiological Decommissioning Funding Assurance Report for Limerick Generating Station, Unit 1 (December 31, 2016 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c) $666,765 2 Site-specific cost amount per 10 CFR 50.75(b)(4) N/A 3 Site-specific cost amount per 10 CFR 72.30(b) $3,675 (a) 4 The amount of decommissioning trust funds accumulated as of December 31, 2016 $408,501 (b) 5 Schedule of the annual amounts remaining to be collected. $8,232 (c) 6 Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 3% (d) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

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

9 Effective February 28, 2017, EGC changed the corporate structure of its subsidiary companies through which the non-qualified decommissioning trust fund is managed and controlled. No change was made to the non-qualified trust agreement or to its master terms and conditions. This change was detailed in letter from Patrick R. Simpson (Exelon Generation Company, LLC) to U.S.

NRC, "Notice of Merger of Subsidiary ""'Non-Qualified Nuclear Decommissioning Trust' Entities into their Parent Company," dated December 22, 2016.

(a) The site-specific decommissioning funding plan was previously provided in a letter from Patrick R. Simpson (EGC) to U.S. NRC, dated March 31, 2015 ("Report on Status of Decommissioning Funding for Reactors and Independent Spent Fuel Storage Installations"). The costs have been escalated in the cost estimate to December 31, 2016 using a unit specific escalation rate. No other changes have been made to the decommissioning funding plan in the March 31, 2015 letter.

(b) The trust fund amount is the amount allocated for Radiological Decommissioning only. EGC has no past-due tax payments related to decommissioning trust fund activities as of December 31, 2016. Periodic payments of estimated income taxes are made during the year on a quarterly basis. The trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2016.

Page 1 of 2

ATTACHMENT 14 (continued)

Annual Radiological Decommissioning Funding Assurance Report for Limerick Generating Station, Unit 1 (December 31, 2016 dollars, thousands)

(c) The funding mechanism being used as the source of revenues for the external sinking funds is a non-bypassable charge approved by the Pennsylvania Public Utilities Commission (PaPUC) authorizing PECO Energy Company to continue to collect decommissioning funds for 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. It is possible that when the impact of license renewal (approved in 2014) is factored into the PaPUC's next cost adjustment calculation (effective January 1, 2018), the collections will be adjusted downward, and potentially could go to $0, beginning in 2018 through 2043.

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

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

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

Page 2 of 2

Attachment 15 Annual Radiological Decommissioning Funding Assurance Report for Limerick Generating Station, Unit 2

ATTACHMENT 15 9,nnual Radiological Decommissioning Funding Assurance Report for Limerick Generating Station, Unit 2 (December 31, 2016 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c) $666,765 2 Site-specific cost amount per 10 CFR 50.75(b)(4) N/A 3 Site-specific cost amount per 10 CFR 72.30(b) $3,672 (a) 4 The amount of decommissioning trust funds accumulated as of December 31, 2016 $430,247 (b) 5 Schedule of the annual amounts remaining to be collected. $13,105 (c) 6 Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 3% (d) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

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

9 Effective February 28, 2017, EGC changed the corporate structure of its subsidiary companies through which the non-qualified decommissioning trust fund is managed and controlled. No change was made to the non-qualified trust agreement or to its master terms and conditions. This change was detailed in letter from Patrick R. Simpson (Exelon Generation Company, LLC) to U.S.

NRC, "Notice of Merger of Subsidiary ""'Non-Qualified Nuclear Decommissioning Trust' Entities into their Parent Company," dated December 22, 2016.

(a) The site-specific decommissioning funding plan was previously provided in a letter from Patrick R. Simpson (EGC) to U.S. NRC, dated March 31, 2015 ("Report on Status of Decommissioning Funding for Reactors and Independent Spent Fuel Storage Installations"). The costs have been escalated from mid-year 2013 dollars in the cost estimate to December 31, 2016 using a unit specific escalation rate. No other changes have been made to the decommissioning funding plan in the March 31, 2015 letter.

(b) The trust fund amount is the amount allocated for Radiological Decommissioning only. EGC has no past-due tax payments related to decommissioning trust fund activities as of December 31, 2016. Periodic payments of estimated income taxes are made during the year on a quarterly basis. The trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2016.

Page 1 of 2

ATTACHMENT 15 (continued)

Annual Radiological Decommissioning Funding Assurance Report for Limerick Generating Station, Unit 2 (December 31, 2016 dollars, thousands)

(c) The funding mechanism being used as the source of revenues for the external sinking funds is a non-bypassable charge approved by the Pennsylvania Public Utilities Commission (PaPUC) authorizing PECO Energy Company to continue to collect decommissioning funds for 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. It is possible that when the impact of license renewal (approved in 2014) is factored into the PaPUC's next cost adjustment calculation (effective January 1, 2018), the collections will be adjusted downward, and potentially could go to $0, beginning in 2018 through 2048.

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

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

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

Page 2of2

Attachment 16 Annual Radiological Decommissioning Funding Assurance Report for Nine Mile Point Nuclear Station, Unit 1

AYYAC KW IENY 116 Annual Radiological Decommissioning Funding Assurance Report for Dine Mile Point Nuclear Station, Unit 1 (December 31, 2016 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c) $595,890 2 Site-specific cost amount per 10 CFR 50.75(b)(4) N/A 3 Site-specific cost amount per 10 CFR 72.30(b) $6,344 (a) 4 The amount of decommissioning trust funds accumulated as of December 31, 2016 $581,113 (b) 5 Schedule of the annual amounts remaining to be collected. $0 6 Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (c) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

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

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

(a) The site-specific decommissioning funding plan was previously provided in a letter from Patrick R. Simpson (EGC) to U.S. NRC, dated March 31, 2015 ("Report on Status of Decommissioning Funding for Reactors and Independent Spent Fuel Storage Installations"). The site-specific cost estimate for ISFSI radiological decommissioning contained in this letter has been updated. The detailed site-specific cost estimate for ISFSI radiological decommissioning is provided in Attachment 29. The costs have been escalated and provided in December 31, 2016 dollars using a site specific escalation rate. No other changes have been made to the decommissioning funding plan in the March 31, 2015 letter.

(b) The trust fund amount is the amount allocated for Radiological Decommissioning only. EGC has no past-due tax payments related to decommissioning trust fund activities as of December 31, 2016. Periodic payments of estimated income taxes are made during the year on a quarterly basis. The trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2016.

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

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

Page 1 of 1

Attachment 17 Annual Radiological Decommissioning Funding Assurance Report for Nine Mile Point Nuclear Station, Unit 2 EGC Portion

AITACHMENT 17 Annual Radiological Decommissioning (Funding Assurance Deport for Nine Mile Point Nuclear Station, Unit 2, EGC Portion (December 31, 2016 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c) $546,747 (a) 2 Site-specific cost amount per 10 CFR 50.75(b)(4) N/A 3 Site-specific cost amount per 10 CFR 72.30(b) $5,195 (a)(b) 4 The amount of decommissioning trust funds accumulated as of December 31, 2016 $361,768 (c) 5 Schedule of the annual amounts remaining to be collected. $0 6 Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (d) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

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

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

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

(b) The site-specific decommissioning funding plan was previously provided in a letter from Patrick R. Simpson (EGC) to U.S. NRC, dated March 31, 2015 ("Report on Status of Decommissioning Funding for Reactors and Independent Spent Fuel Storage Installations"). The site-specific cost estimate for ISFSI radiological decommissioning contained in this letter has been updated. The detailed site-specific cost estimate for ISFSI radiological decommissioning is provided in Attachment 29. The costs have been escalated and provided in December 31, 2016 dollars using a site specific escalation rate. No other changes have been made to the decommissioning funding plan in the March 31, 2015 letter.

(c) The trust fund amount is the amount allocated for Radiological Decommissioning only. EGC has no past-due tax payments related to decommissioning trust fund activities as of December 31, 2016. Periodic payments of estimated income taxes are made during the year on a quarterly basis. The trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2016.

(d) A 2% annual real rate of return is used as allowed by 10 CFR 50.75(e)(1)(0.

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

Page 1 of 1

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

AEI YACHMENT 18 J,\ir nu as Radiio0cguca~ Decomm o ssiioMng Fund iing Assurance Relpoirt ~or Nine Mile Point Nuclear Station, Unit 2, ILIIIP'A Poirtioin (December 31, 2016 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75( c) $120,018 (a) 2 Site-specific cost amount per 10 CFR 50.75(b)(4) N/A 3 Site-specific cost amount per 10 CFR 72.30(b) $1,140 (a)(b) 4 The amount of decommissioning trust funds accumulated as of December 31, 2016 $115,425 (c) 5 Schedule of the annual amounts remaining to be collected. $0 6 Assumptions used regarding rates of escalation , earnings, and other factors used in funding projections 2% (d) 7 There are no contracts relied upon pursuant to 10 CFR 50.75( e)(1)(v).

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

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

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

(b) The site-specific decommissioning funding plan was previously provided in a letter from Patrick R. Simpson (EGC) to U.S. NRC, dated March 31, 2015 ("Report on Status of Decommissioning Funding for Reactors and Independent Spent Fuel Storage Installations"). The site-specific cost estimate for ISFSI radiological decommissioning contained in this letter has been updated. The detailed site-specific cost estimate for ISFSI radiological decommissioning is provided in Attachment 29. The costs have been escalated and provided in December 31, 2016 dollars using a site specific escalation rate. No other changes have been made to the decommissioning funding plan in the March 31, 2015 letter.

(c) The trust fund amount is the amount allocated for Radiological Decommissioning only. This amount was provided by the Nine Mile Point Nuclear Station , Unit 2 co-owner LIPA. LIPA has no past-due tax payments related to decommissioning trust fund activities as of December 31, 2016. Periodic payments of estimated income taxes are made during the year on a quarterly basis. The trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2016. EGC has not independently verified or assessed the trust fund amount.

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

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

Page 1 of 1

Attachment 19 Annual Radiological Decommissioning Funding Assurance Report for Oyster Creek Nuclear Generating Station

ATTACHMENT 19 Annual Radiological Decommissioning Funding Assurance Report for Oyster Creek Nuclear Generating Station (December 31, 2016 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c) $572,184 2 Site-specific cost amount per 10 CFR 50.75(b)(4) $1,083,421 (a) 3 Site-specific cost amount per 10 CFR 72.30(b) $5,688 (b) 4 The amount of decommissioning trust funds accumulated as of December 31, 2016 $888,501 (c) 5 Schedule of the annual amounts remaining to be collected. $0 6 Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (d) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

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

9 Effective February 28, 2017, EGC changed the corporate structure of its subsidiary companies through which the non-qualified decommissioning trust fund is managed and controlled. No change was made to the non-qualified trust agreement or to its master terms and conditions. This change was detailed in letter from Patrick R. Simpson (Exelon Generation Company, LLC) to U.S. NRC, "Notice of Merger of Subsidiary ""'Non-Qualified Nuclear Decommissioning Trust' Entities into their Parent Company," dated December 22, 2016.

(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 James Barstow (EGC) to U.S. NRC, dated March 30, 2016 (TLG Report E16-1726-001, Revision 0, "Decommissioning Cost Analysis for the Oyster Creek Nuclear Generating Station," March 2016). The costs have been escalated from the December 31, 2015 dollars in the decommissioning cost estimate to December 31, 2016.

(b) The site-specific decommissioning funding plan was previously provided in a letter from Patrick R. Simpson (EGC) to U.S. NRC, dated March 31, 2015 ("Report on Status of Decommissioning Funding for Reactors and Independent Spent Fuel Storage Installations"). The costs have been escalated from December 31, 2015 dollars in the cost estimate to December 31, 2016 using a unit specific escalation rate consistent with that used for the plant cost estimate. No other changes have been made to the decommissioning funding plan in the March 31, 2015 letter.

Page 1 of 4

ATTACHMENT 19 (continued)

Annual Radiological Decommissioning Funding Assurance Report for Oyster Creek Nuclear Generating Station (December 31, 2016 dollars, thousands)

(c) The trust fund amount is the amount allocated for Radiological Decommissioning only. EGC has no past-due tax payments related to decommissioning trust fund activities as of December 31, 2016. Periodic payments of estimated income taxes are made during the year on a quarterly basis. The trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2016.

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

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

Page 2 of 4

ATTACHMENT 19 (continued)

Annual Radiological Decommissioning Funding Assurance Report for Oyster Creek Nuclear Generating Station (December 31, 2016 dollars, thousands)

Site ISFSI BOY BOY EOY Radiological Radiological Trust Trust Fund Trust Trust Decommissioning Decommissioning Fund Value Fund Fund Year Cost Cost Value Less Cost Earnings Value 2017* $3,189 $0 $888,501 $885,313 $17,706 $903,019 2018* $3,189 $0 $903,019 $899,830 $17,997 $917,827 2019* $3,189 $0 $917,827 $914,638 $18,293 $932,931 2020 $81,970 $0 $932,931 $850,961 $17,019 $867,980 2021 $71,757 $0 $867,980 $796,223 $15,924 $812,148 2022 $7,603 $0 $812,148 $804,545 $16,091 $820,636 2023 $7,603 $0 $820,636 $813,033 $16,261 $829,294 2024 $7,624 $0 $829,294 $821,670 $16,433 $838,103 2025 $7,401 $0 $838,103 $830,702 $16,614 $847,316 2026 $7,202 $0 $847,316 $840,114 $16,802 $856,916 2027 $7,202 $0 $856,916 $849,714 $16,994 $866,708 2028 $7,222 $0 $866,708 $859,486 $17,190 $876,675 2029 $7,202 $0 $876,675 $869,473 $17,389 $886,862 2030 $7,202 $0 $886,862 $879,660 $17,593 $897,253 2031 $7,202 $0 $897,253 $890,051 $17,801 $907,852 2032 $7,222 $0 $907,852 $900,629 $18,013 $918,642 2033 $7,202 $0 $918,642 $911,439 $18,229 $929,668 2034 $7,202 $0 $929,668 $922,466 $18,449 $940,915 2035 $7,202 $0 $940,915 $933,713 $18,674 $952,387 2036 $7,189 $0 $952,387 $945,198 $18,904 $964,102 2037 $7,169 $0 $964,102 $956,932 $19,139 $976,071 2038 $7,169 $0 $976,071 $968,901 $19,378 $988,279 2039 $7,169 $0 $988,279 $981,110 $19,622 $1,000,732 2040 $7,189 $0 $1,000,732 $993,543 $19,871 $1,013,414 2041 $7,169 $0 $1,013,414 $1,006,245 $20,125 $1,026,369 2042 $7,169 $0 $1,026,369 $1,019,200 $20,384 $1,039,584 2043 $7,169 $0 $1,039,584 $1,032,414 $20,648 $1,053,063 2044 $7,189 $0 $1,053,063 $1,045,874 $20,917 $1,066,791 2045 $7,169 $0 $1,066,791 $1,059,622 $21,192 $1,080,814 2046 $7,169 $0 $1,080,814 $1,073,645 $21,473 $1,095,118 2047 $7,169 $0 $1,095,118 $1,087,948 $21,759 $1,109,707 2048 $7,189 $0 $1,109,707 $1,102,518 $22,050 $1,124,568 2049 $7,169 $0 $1,124,568 $1,117,399 $22,348 $1,139,747 2050 $7,169 $0 $1,139,747 $1,132,577 $22,652 $1,155,229 2051 $7,169 $0 $1,155,229 $1,148,060 $22,961 $1,171,021 2052 $7,189 $0 $1,171,021 $1,163,832 $23,277 $1,187,108 2053 $7,169 $0 $1,187,108 $1,179,939 $23,599 $1,203,538 2054 $7,169 $0 $1,203,538 $1,196,368 $23,927 $1,220,295 2055 $7,169 $0 $1,220,295 $1,213,126 $24,263 $1,237,389 Page 3of4

ATTACHMENT 19 (continued)

Annual Radiological Decommissioning Funding Assurance Report for Oyster Creek Nuclear Generating Station (December 31, 2016 dollars, thousands)

Site ISFSI BOY BOY EOY Radiological Radiological Trust Trust Fund Trust Trust Decommissioning Decommissioning Fund Value Fund Fund Year Cost Cost Value Less Cost Earnings Value 2056 $7,189 $0 $1,237,389 $1,230,199 $24,604 $1,254,803 2057 $7,169 $0 $1,254,803 $1,247,634 $24,953 $1,272,587 2058 $7,169 $0 $1,272,587 $1,265,417 $25,308 $1,290,726 2059 $7,169 $0 $1,290,726 $1,283,556 $25,671 $1,309,227 2060 $7,189 $0 $1,309,227 $1,302,038 $26,041 $1,328,079 2061 $7,169 $0 $1,328,079 $1,320,909 $26,418 $1,347,328 2062 $7,169 $0 $1,347,328 $1,340,158 $26,803 $1,366,961 2063 $7,169 $0 $1,366,961 $1,359,792 $27,196 $1,386,988 2064 $7,189 $0 $1,386,988 $1,379,799 $27,596 $1,407,395 2065 $7,169 $0 $1,407,395 $1,400,225 $28,005 $1,428,230 2066 $7,169 $0 $1,428,230 $1,421,060 $28,421 $1,449,481 2067 $7,169 $0 $1,449,481 $1,442,312 $28,846 $1,471,158 2068 $7,189 $0 $1,471,158 $1,463,969 $29,279 $1,493,248 2069 $7,169 $0 $1,493,248 $1,486,079 $29,722 $1,515,801 2070 $7,169 $0 $1,515,801 $1,508,631 $30,173 $1,538,804 2071 $7,169 $0 $1,538,804 $1,531,634 $30,633 $1,562,267 2072 $7,189 $0 $1,562,267 $1,555,078 $31,102 $1,586,179 2073 $7,169 $0 $1,586,179 $1,579,010 $31,580 $1,610,590 2074 $7,169 $0 $1,610,590 $1,603,421 $32,068 $1,635,489 2075 $44,826 $0 $1,635,489 $1,590,663 $31,813 $1,622,476 2076 $105,840 $0 $1,622,476 $1,516,637 $30,333 $1,546,969 2077 $175,595 $904 $1,546,969 $1,370,470 $27,409 $1,397,879 2078 $142,749 $3,837 $1,397,879 $1,251,293 $25,026 $1,276,319 2079 $68,778 $946 $1,276,319 $1,206,595 $24,132 $1,230,727 2080** $156 $0 $1,230,727 $1,230,572 $24,611 $1,255,183 2081** $85 $0 $1,255,183 $1,255,098 $25,102 $1,280,199 Total*** $1,083,421 $5,688

• Costs in 2017, 2018, and 2019 prior to permanent shutdown at the end of 2019 are for decommissioning planning and do not include any physical decommissioning work.

"*Costs in 2080 and 2081 are administrative expenses associated with submitting a final report to the NRC following license termination and do not include any physical decommissioning work.

• • • Columns may not add due to rounding.

Page 4 of 4

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

ATTACHMENT 20 Annual Radiological Decommissioning Funding Assurance Report for Peach Bottom Atomic Power Station, Unit 1 (December 31, 2016 dollars, thousands)

Formula cost amount per 10 CFR 50.75(c) N/A (a) 2 Site-specific cost amount per 10 CFR 50.75(b)(4) and 50.75(f) $248,539 (a) 3 Site-specific cost amount per 10 CFR 72.30(b) N/A (h) il The amount of decommissioning trust funds accumulated as of December 31, 2016 $100,982 (b) 5 Schedule of the annual amounts remaining to be collected. $2,118 (c) 6 Assumptions used regarding rates of escalation for decommissioning costs, earnings on funds, and other factors used in funding projections 3% (d) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

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

9 Effective February 28, 2017, EGC changed the corporate structure of its subsidiary companies through which the non-qualified decommissioning trust fund is managed and controlled. No change was made to the non-qualified trust agreement or to its master terms and conditions. This change was detailed in letter from Patrick R. Simpson (Exelon Generation Company, LLC) to U.S. NRC, "Notice of Merger of Subsidiary ""'Non-Qualified Nuclear Decommissioning Trust' Entities into their Parent Company," dated December 22, 2016.

10 2016 annual amount spent on decommissioning in $839 (e) accordance with 10 CFR 50.82(a)(8)(v)(A).

11 Cumulative amount spent on decommissioning in accordance $4,108 (f) with 10 CFR 50.82(a)(8)(v)(A).

Reimbursed from the decommissioning trust fund $0 Not yet reimbursed from the decommissioning trust fund $4,108 (g) 12 Amount of funds accumulated to cover the cost of managing N/A (h) irradiated fuel pursuant to 10 CFR 50.82(a)(8)(vii)(A) as of December 31, 2016.

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

Page 1 of 4

ATTACIBIViEN`it' 20 (Continued)

Annual Radiological Decommissioning Funding Assurance Report for Peach Bottom Atomic Power Station, Unit 1 (December 31, 2016 dollars, thousands)

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

In accordance with the regulatory requirements, the site-specific amount is reported per 10 CFR 50.75(b)(4), 50.75(f), 50.82(a)(8)(iii), and 50.82(a)(8)(v)(B) and assumes a DECON scenario as described in the site-specific cost estimate (SSCE) (TLG Report E16-1640-015, Revision 0, "Decommissioning Cost Analysis for the Peach Bottom Atomic Power Station Unit 1," August 2015). The decommissioning cost estimate has been adjusted consistent with the description of planned decommissioning activities in the Peach Bottom Unit 1 Decommissioning Plan. The costs have been escalated from the mid-year 2015 dollars reflected in the SSCE to estimated costs as of December 31, 2016.

Decommissioning expenditures prior to the year the SSCE updates were prepared (historical expenditures) are not included in the estimated total cost of decommissioning in the final SSCE reports. Also, the amount reported does not include cash flows from the SSCE for the annual radiological decommissioning costs in 2015 and 2016. EGC considers the SSCE estimated costs for 2015 and 2016 decommissioning activities to be historical expenditures at the time the 2017 decommissioning funding assurance report is generated.

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.

(b) The trust fund amount is the amount allocated for Radiological Decommissioning only. EGC has no past-due tax payments related to decommissioning trust fund activities as of December 31, 2016. Periodic payments of estimated income taxes are made during the year on a quarterly basis. The trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2016.

(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.

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ATTACHMENT 20 (Continued)

Annual Radiological Decommissioning Funding Assurance Report for Peach Bottom Atomic (Power Station, Unit 1 (December 31, 2016 dollars, thousands)

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

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

(e) The amount spent on decommissioning in 2016 is consistent with the amount budgeted at the station. Even though the amount exceeds the projected 2016 expense total of $201 (December 31, 2015 thousands of dollars) from the site-specific cost estimate, it is immaterial to the overall funding assurance analysis. The

$638 (thousands of dollars) difference between actual and projected is the result of activities related to asbestos abatement and to repair stucco panels.

The amount spent on decommissioning in 2016 represents the 2016 charges to the Peach Bottom Unit 1 project. Prior to reimbursement from the decommissioning trust fund, these charges will be validated to confirm they are legitimate decommissioning expenses. Consequently, the amount reimbursed may differ from the value provided.

(f) The cumulative amount spent on decommissioning is an estimate based on the best information obtainable at this time.

(g) The amount not yet reimbursed is an estimate based on the best information obtainable at this time.

(h) 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 for Peach Bottom Unit 1 remains on-site, and therefore 10 CFR 50.82(a)(8)(vii) and 10 CFR 72.30(b) do not apply.

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ATTACHMENT 20 (Continued)

Annual Radiological Decommissioning Funding Assurance Report for Peach Bottom Atomic Power Station, Unit 1 (December 31, 2016 dollars, thousands)

BOY BOY EOY Radiological Trust Trust Fund First Trust Second Trust Decommissioning Fund Value Half Fund Half Fund Year Cost Value Less Cost** Contributions Earnings Contributions Value 2017 $204 $100,982 $100,778 $1,059 $3,055 $1,059 $105,951 2018 $204 $105,951 $105,746 $1,059 $3,204 $1,059 $111,068 2019 $204 $111,068 $110,864 $1,059 $3,358 $1,059 $116,339 2020 $205 $116,339 $116,135 $1,059 $3,516 $1,059 $121,768 2021 $204 $121,768 $121,564 $1,059 $3,679 $1,059 $127,360 2022 $204 $127,360 $127,156 $1,059 $3,846 $1,059 $133,120 2023 $204 $133,120 $132,916 $1,059 $4,019 $1,059 $139,053 2024 $205 $139,053 $138,848 $1,059 $4,197 $1,059 $145,163 2025 $204 $145,163 $144,958 $1,059 $4,381 $1,059 $151,457 2026 $204 $151,457 $151,252 $1,059 $4,569 $1,059 $157,939 2027 $204 $157,939 $157,735 $1,059 $4,764 $1,059 $164,616 2028 $205 $164,616 $164,411 $1,059 $4,964 $1,059 $171,493 2029 $204 $171,493 $171,289 $1,059 $5,170 $1,059 $178,577 2030 $204 $178,577 $178,373 $1,059 $5,383 $1,059 $185,873 2031 $204 $185,873 $185,669 $1,059 $5,602 $1,059 $193,389 2032 $205 $193,389 $193,184 $1,059 $5,827 $1,059 $201,129 2033 $36,594 $201,129 $164,535 $0 $4,936 $0 $169,471 2034 $55,121 $169,471 $114,351 $0 $3,431 $0 $117,781 2035 $63,615 $117,781 $54,166 $0 $1,625 $0 $55,791 2036 $46,456 $55,791 $9,336 $0 $280 $0 $9,616 2037 $41,221 $9,616 $ (31,606) $0 $0 $0 $ (31,606) 2038 $2,261 $ (31,606) $ (33,866) $0 $0 $0 $ (33,866)

Total* $248,539

• Columns may not add due to rounding

• • Annual contributions added to individual years - Earnings of half of contributions are included in current year to estimate payment of contributions throughout the year Page 4 of 4

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

ATTACHMENT 21 Annual Radiological Decommissioning Funding Assurance Report for Peach Bottom Atomic Power Station, Unit 2 (December 31, 2016 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c) $333,382 (a) 2 Site-specific cost amount per 10 CFR 50.75(b)(4) N/A 3 Site-specific cost amount per 10 CFR 72.30(b) $2,340 (a)(b) 4 The amount of decommissioning trust funds accumulated as of December 31, 2016 $253,637 (c) 5 Schedule of the annual amounts remaining to be collected. $0 (d) 6 Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 3% (e) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

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

9 Effective February 28, 2017, EGC changed the corporate structure of its subsidiary companies through which the non-qualified decommissioning trust fund is managed and controlled. No change was made to the non-qualified trust agreement or to its master terms and conditions. This change was detailed in letter from Patrick R. Simpson (Exelon Generation Company, LLC) to U.S.

NRC, "Notice of Merger of Subsidiary ""'Non-Qualified Nuclear Decommissioning Trust' Entities into their Parent Company," dated December 22, 2016.

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

(b) The site-specific decommissioning funding plan was previously provided in a letter from Patrick R. Simpson (EGC) to U.S. NRC, dated March 31, 2015 ("Report on Status of Decommissioning Funding for Reactors and Independent Spent Fuel Storage Installations"). The site-specific cost estimate for ISFSI radiological decommissioning contained in this letter has been updated. The detailed site-specific cost estimate for ISFSI radiological decommissioning is provided in Attachment 29. The costs have been escalated and provided in December 31, 2016 dollars using a site specific escalation rate. No other changes have been made to the decommissioning funding plan in the March 31, 2015 letter.

(c) The trust fund amount is the amount allocated for Radiological Decommissioning only. EGC has no past-due tax payments related to decommissioning trust fund activities as of December 31, 2016. Periodic payments of estimated income taxes are made during the year on a quarterly basis. The trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2016.

Page 1 of 2

ATTACHMENT 21 (continued)

Annual Radiological Decommissioning Funding Assurance Deport for Peach Bottom Atomic Power Station, (Unit 2 (December 31, 2016 dollars, thousands)

(d) The funding mechanism being used as the source of revenues for the external sinking funds is a non-bypassable charge approved by the Pennsylvania Public Utilities Commission (PaPUC) authorizing DECO 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.

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

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

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

Page 2of2

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

ATTACHMENT 22 Annual Radiological Decommissioning Funding Assurance Report for Peach Bottom Atomic Power Station, Unit 3 (December 31, 2016 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c) $333,382 (a) 2 Site-specific cost amount per 10 CFR 50.75(b)(4) N/A 3 Site-specific cost amount per 10 CFR 72.30(b) $2,340 (a)(b) 4 The amount of decommissioning trust funds accumulated as of December 31, 2016 $275,030 (c) 5 Schedule of the annual amounts remaining to be collected. $0 (d) 6 Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 3% (e) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

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

9 Effective February 28, 2017, EGC changed the corporate structure of its subsidiary companies through which the non-qualified decommissioning trust fund is managed and controlled. No change was made to the non-qualified trust agreement or to its master terms and conditions. This change was detailed in letter from Patrick R. Simpson (Exelon Generation Company, LLC) to U.S.

NRC, "Notice of Merger of Subsidiary ""'Non-Qualified Nuclear Decommissioning Trust' Entities into their Parent Company," dated December 22, 2016.

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

(b) The site-specific decommissioning funding plan was previously provided in a letter from Patrick R. Simpson (EGC) to U.S. NRC, dated March 31, 2015 ("Report on Status of Decommissioning Funding for Reactors and Independent Spent Fuel Storage Installations"). The site-specific cost estimate for ISFSI radiological decommissioning contained in this letter has been updated. The detailed site-specific cost estimate for ISFSI radiological decommissioning is provided in Attachment 29. The costs have been escalated and provided in December 31, 2016 dollars using a site specific escalation rate. No other changes have been made to the decommissioning funding plan in the March 31, 2015 letter.

(c) The trust fund amount is the amount allocated for Radiological Decommissioning only. EGC has no past-due tax payments related to decommissioning trust fund activities as of December 31, 2016. Periodic payments of estimated income taxes are made during the year on a quarterly basis. The trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2016.

?age 1 of 2

ATTACHMENT 22 (continued)

Annual Radiological Decommissioning Funding Assurance Report for Peach Bottom Atomic Power Station, Unit 3 (December 31, 2016 dollars, thousands)

(d) The funding mechanism being used as the source of revenues for the external sinking funds is a non-bypassable charge approved by the Pennsylvania Public Utilities Commission (PaPUC) authorizing PECO Energy Company to continue to collect decommissioning funds for 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.

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

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

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

Page 2 of 2

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

ATTACHMENT 23 Annual Radiological Decommissioning Funding Assurance Report for Quad Cities Nuclear Power Station, Unit 1 (December 31, 2016 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c) $473,294 (a) 2 Site-specific cost amount per 10 CFR 50.75(b)(4) N/A 3 Site-specific cost amount per 10 CFR 72.30(b) $5,601 (a)(b) 4 The amount of decommissioning trust funds accumulated as of December 31, 2016 $412,683 (c) 5 Schedule of the annual amounts remaining to be collected. $0 6 Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (d) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

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

9 Effective February 28, 2017, EGC changed the corporate structure of its subsidiary companies through which the non-qualified decommissioning trust fund is managed and controlled. No change was made to the non-qualified trust agreement or to its master terms and conditions. This change was detailed in letter from Patrick R. Simpson (Exelon Generation Company, LLC) to U.S.

NRC, "Notice of Merger of Subsidiary ""'Non-Qualified Nuclear Decommissioning Trust' Entities into their Parent Company," dated December 22, 2016.

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

(b) The site-specific decommissioning funding plan was previously provided in a letter from Patrick R. Simpson (EGC) to U.S. NRC, dated March 31, 2015 ("Report on Status of Decommissioning Funding for Reactors and Independent Spent Fuel Storage Installations"). The site-specific cost estimate for ISFSI radiological decommissioning contained in this letter has been updated. The detailed site-specific cost estimate for ISFSI radiological decommissioning is provided in Attachment 29. The costs have been escalated and provided in December 31, 2016 dollars using a site specific escalation rate. No other changes have been made to the decommissioning funding plan in the March 31, 2015 letter.

Page 1 of 2

ATTACHMENT 23 (continued)

Aninuall Ra6onogical Decommissioning Funding Assurance Report for Quad Cities Nuclear Power Station, Unit 1 (December 31, 2016 dollars, thousands)

(c) The trust fund amount is the amount allocated for Radiological Decommissioning only. EGC has no past-due tax payments related to decommissioning trust fund activities as of December 31, 2016. Periodic payments of estimated income taxes are made during the year on a quarterly basis. The trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2016.

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

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

Page 2of2

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

ATTACHMENT 24 Aninuall kladioiogica0 Decomm u ssioMng Funding Assurance Relpoirt for Quadl Cities Nuclear Power Staition, UnK 2 (December 31, 2016 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c) $473,294 (a) 2 Site-specific cost amount per 10 CFR 50.75(b)(4) N/A 3 Site-specific cost amount per 10 CFR 72.30(b) $5,602 (a)(b) 4 The amount of decommissioning trust funds accumulated as of December 31, 2016 $462,635 (c) 5 Schedule of the annual amounts remaining to be collected. $0 6 Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (d) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

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

9 Effective February 28, 2017, EGC changed the corporate structure of its subsidiary companies through which the non-qualified decommissioning trust fund is managed and controlled. No change was made to the non-qualified trust agreement or to its master terms and conditions. This change was detailed in letter from Patrick R. Simpson (Exelon Generation Company, LLC) to U.S.

NRC, "Notice of Merger of Subsidiary ""'Non-Qualified Nuclear Decommissioning Trust' Entities into their Parent Company," dated December 22, 2016.

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

(b) The site-specific decommissioning funding plan was previously provided in a letter from Patrick R. Simpson (EGC) to U.S. NRC, dated March 31, 2015 ("Report on Status of Decommissioning Funding for Reactors and Independent Spent Fuel Storage Installations"). The site-specific cost estimate for ISFSI radiological decommissioning contained in this letter has been updated. The detailed site-specific cost estimate for ISFSI radiological decommissioning is provided in Attachment 29. The costs have been escalated and provided in December 31, 2016 dollars using a site specific escalation rate. No other changes have been made to the decommissioning funding plan in the March 31, 2015 letter.

Page 1 of 2

A01-T,A,CHMENT 24 (coinitiiniuedl)

Annuall Radliollogical Decommissioning Funding Assurance In'leporit for Quad CiRt es IMuclear Power Station, Hn i(2 (December 31, 2016 dollars, thousands)

(c) The trust fund amount is the amount allocated for Radiological Decommissioning only. EGC has no past-due tax payments related to decommissioning trust fund activities as of December 31, 2016. Periodic payments of estimated income taxes are made during the year on a quarterly basis. The trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2016.

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

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

Page 2of2

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

ATTACIHMENT 25 Annual Radiological Decommissioning Funding Assurance Report for R.E. Ginna Nuclear Rower (Plant (December 31, 2016 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c) $434,408 2 Site-specific cost amount per 10 CFR 50.75(b)(4) N/A 3 Site-specific cost amount per 10 CFR 72.30(b) $6,241 (a) 4 The amount of decommissioning trust funds accumulated as of December 31, 2016 $423,414 (b) 5 Schedule of the annual amounts remaining to be collected. $0 6 Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (c) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

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

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

(a) The site-specific decommissioning funding plan was previously provided in a letter from Patrick R. Simpson (EGC) to U.S. NRC, dated March 31, 2015 ("Report on Status of Decommissioning Funding for Reactors and Independent Spent Fuel Storage Installations"). The site-specific cost estimate for ISFSI radiological decommissioning contained in this letter has been updated. The detailed site-specific cost estimate for ISFSI radiological decommissioning is provided in Attachment 29. The costs have been escalated and provided in December 31, 2016 dollars using a site specific escalation rate. No other changes have been made to the decommissioning funding plan in the March 31, 2015 letter.

(b) The trust fund amount is the amount allocated for Radiological Decommissioning only. EGC has no past-due tax payments related to decommissioning trust fund activities as of December 31, 2016. Periodic payments of estimated income taxes are made during the year on a quarterly basis. The trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2016.

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

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

Page 1 of 1

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

ATTACHMENT 26 Annual Radiological Decommissioning Funding Assurance Report for Salem Generating Station, Unit 1 (December 31, 2016 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c) $199,616 (a) 2 Site-specific cost amount per 10 CFR 50.75(b)(4) N/A 3 Site-specific cost amount per 10 CFR 72.30(b) $1,557 (a)(b) 4 The amount of decommissioning trust funds accumulated as of December 31, 2016 $234,941 (c) 5 Schedule of the annual amounts remaining to be collected. $0 (d) 6 Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 3% (e) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

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

9 Effective February 28, 2017, EGC changed the corporate structure of its subsidiary companies through which the non-qualified decommissioning trust fund is managed and controlled. No change was made to the non-qualified trust agreement or to its master terms and conditions. This change was detailed in letter from Patrick R. Simpson (Exelon Generation Company, LLC) to U.S.

NRC, "Notice of Merger of Subsidiary ""'Non-Qualified Nuclear Decommissioning Trust' Entities into their Parent Company," dated December 22, 2016.

(a) Value is based on the Exelon Generation Company, LLC (EGC) ownership share of Salem Generating Station, Unit 1 of 42.59%.

(b) The site-specific decommissioning funding plan was previously provided in a letter from Patrick R. Simpson (EGC) to U.S. NRC, dated March 31, 2015 ("Report on Status of Decommissioning Funding for Reactors and Independent Spent Fuel Storage Installations"). The site-specific cost estimate for ISFSI radiological decommissioning contained in this letter has been updated. The detailed site-specific cost estimate for ISFSI radiological decommissioning is provided in Attachment 29. The costs have been escalated and provided in December 31, 2016 dollars using a site specific escalation rate. No other changes have been made to the decommissioning funding plan in the March 31, 2015 letter.

(c) The trust fund amount is the amount allocated for Radiological Decommissioning only. EGC has no past-due tax payments related to decommissioning trust fund activities as of December 31, 2016. Periodic payments of estimated income taxes are made during the year on a quarterly basis. The trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2016.

Page 1 of 2

Annual IRladiiollogiicall I0)ecoinn inniiissuoin~ng Fu.und1iincg Assurance IRlepon i or Salleinn (fie ;nieiraiRii ng Sitailtiioin, llllinKit 1 (December 31, 2016 dollars, thousands)

(d) The funding mechanism being used as the source of revenues for the external sinking funds is a non-bypassable charge approved by the Pennsylvania Public Utilities Commission ( PaPUC) authorizing PECO Energy Company to continue to collect decommissioning funds for 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.

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

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

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

Page 2 of 2

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

ATTACHMENT 27 Annual Radiological Decommissioning Funding Assurance Report for Salem Generating Station, Onit 2 (December 31, 2016 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c) $199,616 (a) 2 Site-specific cost amount per 10 CFR 50.75(b)(4) N/A 3 Site-specific cost amount per 10 CFR 72.30(b) $1,556 (a)(b) 4 The amount of decommissioning trust funds accumulated as of December 31, 2016 $195,313 (c) 5 Schedule of the annual amounts remaining to be collected. $0 (d) 6 Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 3% (e) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

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

9 Effective February 28, 2017, EGC changed the corporate structure of its subsidiary companies through which the non-qualified decommissioning trust fund is managed and controlled. No change was made to the non-qualified trust agreement or to its master terms and conditions. This change was detailed in letter from Patrick R. Simpson (Exelon Generation Company, LLC) to U.S.

NRC, "Notice of Merger of Subsidiary ""'Non-Qualified Nuclear Decommissioning Trust' Entities into their Parent Company," dated December 22, 2016.

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

(b) The site-specific decommissioning funding plan was previously provided in a letter from Patrick R. Simpson (EGC) to U.S. NRC, dated March 31, 2015 ("Report on Status of Decommissioning Funding for Reactors and Independent Spent Fuel Storage Installations"). The site-specific cost estimate for ISFSI radiological decommissioning contained in this letter has been updated. The detailed site-specific cost estimate for ISFSI radiological decommissioning is provided in Attachment 29. The costs have been escalated and provided in December 31, 2016 dollars using a site specific escalation rate. No other changes have been made to the decommissioning funding plan in the March 31, 2015 letter.

(c) The trust fund amount is the amount allocated for Radiological Decommissioning only. EGC has no past-due tax payments related to decommissioning trust fund activities as of December 31, 2016. Periodic payments of estimated income taxes are made during the year on a quarterly basis. The trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2016.

Page 1 of 2

ATTACHMENT 27 (continued)

Annual Radiological Decommissioning Funding Assurance Report for Salem Generating Station, Unit 2 (December 31, 2016 dollars, thousands)

(d) The funding mechanism being used as the source of revenues for the external sinking funds is a non-bypassable charge approved by the Pennsylvania Public Utilities Commission (PaPUC) authorizing PECO Energy Company to continue to collect decommissioning funds for 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 2039.

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

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

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

1 age2of2

Attachment 28 Annual Radiological Decommissioning Funding Assurance Report for Three Mile Island Nuclear Station, Unit 1

/a"11'TAGH1i VENT 28 Annu.uall Cla6ollogiical Decominroissioning Funding Assurance Report for Tihiree Mile Island Nuclear Station, Unit 1 (December 31, 2016 dollars, thousands) 1 Formula cost amount per 10 CFR 50.75(c) $467,860 2 Site-specific cost amount per 10 CFR 50.75(b)(4) N/A 3 Site-specific cost amount per 10 CFR 72.30(b) N/A (a) 4 The amount of decommissioning trust funds accumulated as of December 31, 2016 $625,913 (b) 5 Schedule of the annual amounts remaining to be collected. $0 6 Assumptions used regarding rates of escalation, earnings, and other factors used in funding projections 2% (c) 7 There are no contracts relied upon pursuant to 10 CFR 50.75(e)(1)(v).

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

9 Effective February 28, 2017, EGC changed the corporate structure of its subsidiary companies through which the non-qualified decommissioning trust fund is managed and controlled. No change was made to the non-qualified trust agreement or to its master terms and conditions. This change was detailed in letter from Patrick R. Simpson (Exelon Generation Company, LLC) to U.S.

NRC, "Notice of Merger of Subsidiary ""'Non-Qualified Nuclear Decommissioning Trust' Entities into their Parent Company," dated December 22, 2016.

(a) Three Mile Island does not have an ISFSI. Therefore, 1 OCFR72 does not apply to Three Mile Island.

(b) The trust fund amount is the amount allocated for Radiological Decommissioning only. EGC has no past-due tax payments related to decommissioning trust fund activities as of December 31, 2016. Periodic payments of estimated income taxes are made during the year on a quarterly basis. The trust fund amounts comply with the reporting requirements of 10 CFR 50.75(f) in that the amount of funds reported are those that were accumulated as of December 31, 2016.

(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 19, 2034.

Page 1 of 1

Attachment 29 ISFSI Decommissioning Funding Estimates

ATTACHMENT 29 ISFSI Decommissioning Funding Estimates Calvert Cliffs Nuclear Poorer Plant (December 31, 2016 dollars, thousands)

LLRVJ Oversight and Removal Packaging Transport Burial Volume Craft Activity Description Disposal Other Costs Total Costs Contractor Costs Costs Costs Class A (ft3) fe1anhours Costs Manhours Decommissioning Contractor Planning (characterization,

$393 $393 1,336 specs and procedures)

Decontamination (activated

$464 $5 $1,055 $1,907 $768 $4,199 26,166 4,105 liner and concrete rernoval)

License Termination

$2,032 $2,032 16,274 (radiological surveys)

Subtotal $464 $5 $1,055 $1,907 $3,192 $6,623 26,166 20,379 1,336 Supporiing Costs NRC and NRC Contractor Fees

$400 $400 776 and Costs Property taxes $340 $340 Security Staff Cost $377 $377 4937 Oversight Staff $352 $352 3740 Subtotal $1,469 $1,469 9453 Total (u/o contingency) $464 $5 $1,055 $1,907 $4,661 $8,092 26,166 20,379 10,789 Total (vx/25% contingency) $10,115 Costs for ISFSI decommissioning are split according to the unit's site specific cost escalation factor. The cost split is the follov., ing:

Calvert Cliffs Unit 1: $5,053 Calvert Cliffs Unit 2: $5,062 Page 1 of 6

ATTACHMENT 29 (Continued)

ISFSI Decommissioning Funding Estimates Nine We Point Nuclear Station (December 31, 2016 dollars, thousands)

LLR`^J Oversight and Removal Packaging Transport Burial Volume Craft Activity Description Disposal Other Costs Total Costs Contractor Costs Costs Costs Class A (ft3) fianhours Costs Mianhours Decommissioning Contractor Planning (characterization,

$422 $422 1,384 specs and procedures)

Decontamination (activated

$537 $6 $1,518 $2,860 $821 $5,743 40,659 4,613 HS~.1 disposition)

License Termination

$2,345 $2,345 18,710 (radiological surveys)

Subtotal $537 $6 $1,518 $2,860 $3,587 $8,509 40,659 23,323 1,384 Supporting Costs NRC and N'RC Contractor Fees

$400 $400 776 and Costs Insurance $151 $151 Propei Ly taxes $339 $339 Security Staff Cost $398 $398 4,937 Oversight Staff $347 $347 3,740 Subtotal $1,634 $1,634 9,453 Total (i-./o contingency) $537 $6 $1,518 $2,860 $5,221 $10,143 40,659 23,323 10,837 Total (tv/25% contingency) $12,679 Costs for ISFSI decommissioning are split according to the unit's site specific cost escalation factor. The cost split is the follov., ing:

Nine Mile Point Unit 1: $6,344 Nine Mile Point Unit 2: $6,335 Unit costs are then pro-rated based on ovJnership share.

Page 2 of 6

ATTACHMENT 29 (Continued) iSFSI Decommissioning C un6nci Estimates Peach Bottom Atomic Power Suiflon (December 31, 2016 dollars, thousands)

LLRVJ Oversight and Removal Packaging Transport Burial Volume Craft Activity Description Disposal Other Costs Total Costs Contractor Costs Costs Costs Class A (ft3) ivianhours Costs Manhours Decommissioning Contractor Planning (characterization,

$372 $372 1,192 specs and procedures)

Decontamination (activated

$257 $139 $999 $2,424 $3,819 35,613 2,692 HSM disposition)

License Termination

$1,794 $1,794 14,799 (radiological surveys)

Subtotal $257 $139 $999 $2,424 $2,167 $5,986 35,613 17,491 1,192 Suppoi ling Costs NRC and NRC Contractor Fees

$432 $432 776 and Costs Insurance $63 $63 Property takes $340 $340 Site 0&".1 $115 $115 Security Staff Cost $226 $226 1,729 Oversight Staff $327 $327 1,901 Subtotal $1,503 $1,503 4,406 Total (w/o contingency) $257 $139 $999 $2,424 $3,670 $7,489 35,613 17,491 5,598 Total (w/25% contingency) $9,361 Costs for ISFSI decommissioning are split according to the unit's site specific cost escalation factor. The cost split is the follov.,ing:

Peach Bottom Unit 2: $4,680 Peach Bottom Unit 3: $4,681 Unit costs are then pro-rated based on ovmership share.

Page 3 of 6

Quad Cities Nuclear Power Station (December 31, 2016 dollars, thousands)

LLRVJ Oversight and Removal Packaging Transport Burial Volume Craft Activity Description Disposal Other Costs Total Costs Contractor Costs Costs Costs Class A (ft3) i:elanhours Costs Manhours Decommissioning Contractor Planning (characterization,

$485 $485 1,336 specs and procedures)

Decontamination (overpack

$627 $370 $1;398 $4,955 $48 $7,399 117,230 8,994 disposition)

License Termination

$2,096 $2,096 16,811 (radiological surveys)

Subtotal $627 $370 $1,398 $4,955 $2,629 $9,980 117,230 25,805 1,336 Supporting Costs NRC and NRC Contractor Fees

$421 $421 776 and Costs Insurance $157 $157 Property taxes $333 $333 Heavy Equipment $337 $337 Energy $49 $49 Security Staff Cost $305 $305 4,978 Oversight Staff $369 $369 3,771 Subtotal $337 $1,633 $1,970 9,525 Total (v#o contingency) $965 $370 $1,398 $4,955 $4,262 $11,950 117,230 25,805 10,861 Total (vi/25%contingency) $14,937 Costs for ISFSI decommissioning are split according to the unit's site specific cost escalation factor. The cost split is the follo:^ring:

Quad Cities Unit 1: $7,468 Quad Cities Unit 2: $7,469 Unit costs are then pro-rated based on ov.!nership share.

Page 4of6

ATTACHMENT 29 (Continued)

ISPSI Decommissioning Funding Estimates R.E. Ginna Nuclear Power Plant (December 31, 2016 dollars, thousands)

LLRVJ Oversight and Removal Packaging Transport Burial Volume Craft Activity Description Disposal Other Costs Total Costs Contractor Costs Costs Costs Class A (ft3) Manhours Costs IL'lanhours Decor-nmissioning Contractor Planning (characte(ization,

$216 $216 1,072 specs and procedures)

Decontamination (activated

$359 $2 $466 $761 $687 $2,274 8,731 3,087 liner and concrete removal)

License Ter inination

$977 $977 7,49b (radiological surveys)

Subtotal $359 $2 $466 $761 $1,880 $3,467 8,731 101 583 1,072 Supporting Costs r:RC and NRC Contractor Fees

$402 $402 776 and Costs Insurance $152 $152 Property taxes $345 $345 Security Staff Cost $271 $271 4,971 O°.ersi0ht Staff $356 $356 3,771 Subtotal $1,526 $1,526 9,518 Total (vv/o contingency) $359 $2 $466 $761 $3,406 $4,993 8,731 10,583 10,590 Total (v.,/25% contingency)

1 $6,241 Page 5 of 6

ATTACHMENT 29 (Continued)

VSF SB Deernrnussoonong Fundlong Estimates SaDem Generating Station (December 31, 2016 dollars, thousands)

LLRVJ Oversight and Removal Packaging Transport Burial Volume Craft Aciivity Description Disposal Other Costs Total Costs Contractor Costs Costs Costs Class A (ft3) i'Janhours Costs r4anhours Decommissionhig Contractor Planning (characterization,

$430 $430 1,240 specs and procedures)

Decontarnination (overpack

$259 $104 $233 $1,813 $2,409 29,111 2,570 disposition)

License Termination

$2,121 $2,121 16,105 (radiological surveys)

Subtotal $259 $104 $233 $1,813 $2,550 $4,959 29,111 18,675 1,240 Supporting Costs NRC and NRC Contractor Fees

$402 $402 776 and Costs Insurance $100 $100 Propel Ly taxes $16 $16 Security Staff Cost $160 $160 2,910 Ovei~ight Staff $210 $210 2,277 Subtotal $0 $888 $888 5,963 Total ( r/o contingency) $259 $104 $233 $1,813 $3,438 $5,847 29,111 18,675 7,203 Total (~r/25% contingency) $7,309 Costs for ISFSI decommissioning are split according to the unit's site specific cost escalation factor. The cost split is the follo,.-Jng:

Salem Unit 1: $3,656 Salem Unit 2: $3,653 Unit costs are then pro-rated based on o:.,nership share.

Page 6of6

Attachment 30 Changes to the Proposed ISFSI Decommissioning Funding Plans for Clinton Power Station

Attachment 30 Changes to the Proposed ISFSI Decommissioning Funding Plans for Clinton Power Station In letter from David M. Gullott (Exelon Generation Company, LLC) to U.S. NRC, "Proposed Independent Spent Fuel Storage Installation (ISFSI) Decommissioning Funding Plans for Clinton Power Station," dated September 6, 2016, EGC submitted proposed ISFSI decommissioning funding plans for Clinton Power Station (CPS). At the time, EGC did not have sufficient funding to decommission the ISFSI and was monitoring funding assurance and new developments for CPS to assess the status of funding assurance and to take such actions as may be necessary to resolve any continuing funding shortfalls. EGC acknowledged in the above reference letter that adequate funding would be provided for decommissioning of the ISFSI in the biennial decommissioning funding submittal.

Since the issuance of the above referenced letter, adequate decommissioning funding assurance for the ISFSI has been provided. The change in funding status was primarily driven by two factors. EGC has reversed the decision to close CPS as detailed in letter from Michael P. Gallagher (Exelon Generation Company, LLC) to U.S. NRC, "Withdrawal of Certification of Permanent Cessation of Power Operations for Clinton Power Station and Previously Submitted Licensing Actions in Support of Decommissioning," dated December 14, 2016. EGC has changed its shutdown date assumption used in the calculation of the decommissioning trust fund earnings credit through shutdown from June 1, 2017 to September 29, 2026. This has resulted in significantly more earnings prior to shutdown. The second factor was the issuance of NUREG-1307 Rev. 16, "Report on Waste Burial Charges." The waste burial adjustment factors used in the calculation of the NRC Minimum Formula Amount for CPS decreased in Rev. 16 of NUREG-1307 when compared to Rev. 15. This has resulted in a decrease in the overall Formula Cost Amount per 10 CFR 50.75(c).

The following sections of Attachment 1 of the decommissioning funding plan in letter from David M. Gullott (Exelon Generation Company, LLC) to U.S. NRC, "Proposed Independent Spent Fuel Storage Installation (ISFSI) Decommissioning Funding Plans for Clinton Power Station," dated September 6, 2016 are revised as follows:

2.1 Reasonable Assurance of Funds Availability EGC's trust fund for CPS exceeds the costs required for radiological decommissioning as of information available on December 31, 2016 as outlined in Attachment 8. These excess assets will be used to decommission the on-site ISFSI. Attachment 8 shows the trust fund assets for CPS, the costs estimated for radiological decommissioning under 10 CFR 50.75(c), and the costs estimated for ISFSI decommissioning under 10 CFR 72.30(b) as of December 31, 2016.

2.4 Method of Assurance Decommissioning funding assurance is provided by the methods allowed by 10 CFR 50.75(e)(1)(i) and 10 CFR 72.30(e)(1). In order to meet the requirements of 10 CFR 72.30(b)(4), EGC periodically updates the CPS DCE, including ISFSI decommissioning costs, and adjusts the funding levels, as necessary, in accordance with 10 CFR 50.75.

Page 1 of 2

Attachment 30 (continued)

Changes to the Proposed ISFSI Decommissioning Funding Plans for Clinton Power Station 2.6 Certification of Financial Assurance In accordance with 10 CFR 72.30(b), financial assurance, for decommissioning, has been provided in an amount that meets or exceeds the requirements of 10 CFR50.75(b).

As demonstrated in Attachment 8, this provides the requisite financial assurance for the ISFSI decommissioning cost.

All other sections and Attachments in letter from David M. Gullott (Exelon Generation Company, LLC) to U.S. NRC, "Proposed Independent Spent Fuel Storage Installation (ISFSI) Decommissioning Funding Plans for Clinton Power Station," dated September 6, 2016 remain unchanged.

Page 2 of 2