ML21091A037

Independent Spent Fuel Storage Funding Status Report 2020

ML21091A037
Person / Time
Site:	San Onofre
Issue date:	03/24/2021
From:	Bates A Southern California Edison Co
To:	Document Control Desk, Office of Nuclear Material Safety and Safeguards, Office of Nuclear Reactor Regulation
References
Download: ML21091A037 (9)

Text

Al Bates Manager, Regulatory Affairs An EDISON INTIDlNATIONAL~ Company March 24, 2021 10 CFR 50.82 10 CFR 72.30 A TIN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, D. C. 20555-0001 *

Subject:

Docket Nos. 50-206, 50-361, 50-362, ar:id 72-41 10 CFR 50.82(a)(8)(v and vii) and 10 CFR 72.30(c)

Decommissioning Funding Status Report 2020 San Onofre Nuclear Generating Station Units 1, 2, and 3 and Independent Spent Fuel Storage Installation

Dear Sir or Madam:

As required by 10 CFR 50.82(a)(8)(v), 1.0 CFR 50.82(a)(8)(vii), and 10 CFR 72.30(c), this letter provides the status of the decommissioning funding for San Onofre Nuclear Generating Station (San Onofre) Units 1, 2, and 3 and the San Onofre Independent Spent Fuel Storage Installation (ISFSI) as of December 31, 2020.

Based on the requirements in 10 CFR 50.82(a}(8)(v) and 10 CFR 50.82(a)(8)(vii), this information is reported on an annual basis for SONGS Units 1, 2, and 3 because the units were permanently shut down and site-specific qecommissioning e<;>st estimates (DCEs) have been submitted for each of these units. In addition, based on the requirements in 10 CFR 72.30(c),

information demonstrating the adequacy of funding for the San Onofre ISFSI is reported at intervals not to exceed three years, and is included. The required information for Southern California Edison, San Diego Gas & 'Electric, the City of Anaheim, and the City of Riverside is provided in the Enclosure.

There are no commitments contained in this letter or its enclosure.

If you have any questions regarding this matter, please contact me at (949) 368-7024.

Enclosure:

San Onofre Nuclear Generating Station U_nits 1, 2, and 3 and ISFSI Decommissioning Funding Status Report for Calendar Year 2020 cc: S. A. Morris, Regional Administrator, NRC Region IV A. M. Snyder, NRC Project Manager, San Onofre Units 1, 2, and 3

Enclosure San Onofre Nuclear Generating Station Units 1, 2, and 3 and Independent Spent Fuel Storage Installation {ISFSI)

Decommissioning Funding Status Report for Calendar Year 2020

San Onofre Nuclear Generating Station Units 1, 2, and 3 and Independent Spent Fuel Storage Installation (ISFSI)

Decommissioning Funding Status Report For Calendar Year 2020 San Onofre Unit 1 was a pressurized water reactor (PWR) rated at 1347 MWt. San Onofre Units 2 and 3 were PWRs rated at 3438 MWt. Provided below ts the information required by 10 CFR 50.82(a)(8)(v) and (vii) for San Onofre Units 1, 2, and 3; and the information required by 10 CFR 72.30(b) for the San Onofre ISFSI. This information is reported every year for San Onofre Units 1, 2, and 3 because they are permanently shut down and site-specific decommissioning cost estimates (DCEs) have been submitted for them.

The San Onofre ISFSI is located on the partially decommissioned site of San Onofre Unit 1, and is operated under a 10 CFR 72 General License issued to the holders of a 10 CFR 50 license.

The SONGS Unit 1 co-owners are reported as follows:

Southern California Edison (SCE) 80.00 %

San Diego Gas & Electric (SDG&E) 20.00 %

100.00 %

The San Onofre Units 2 and 3 co-owners are reported as follows:

Southern California Edison (SCE) 78.21 %

San Diego Gas & Electric (SDG&E) 20.00 %

City of Anaheim (Anaheim) 0.00 %

City of Riverside (Riverside) 1.79 %

The decommissioning liability is shared between the current owners and former owner, Anaheim, as set forth below for each unit:

Unit 1 Unit2 Unit 3 Owner Decommissioning Decommissioning Decommissioning Liability Liability Liability SCE 80.00% 75.7363% 75.7475%

SDG&E 20.00% 20.0000% 20.0000%

Anaheim 0.00% 2.4737% 2.4625%

Riverside 0.00% 1.7900% 1.7900%

All dollar amounts are in 100% share, 2020 dollars.

1) The estimated costs to decommission San Onofre Units 1, 2, and 3, and the San Onofre ISFSI, including all decommissioning and spent fuel storage costs estimated to be required pursuant to 10 CFR 50.75(b) and (c); 10 CFR 50.54(bb);

and 10 CFR 72.30(b) are shown below:

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The site-specific estimates for decommissioning include the following radiological decommissioning costs associated with terminating the site license pursuant to 10 CFR 50.75(b); non-radiological site restoration costs; spent fuel storage costs pursuant to 10 CFR 50.54(bb); and ISFSI decommissioning costs pursuant to 10 CFR 72.30(b ):

San Onofre Unit 1(1)

Estimate of License Termination Costs $ 83.0 million Less: Lie. Term. Costs during 2016-2020 $ 47.5 million "To Go" License Termination Costs $ 35.5 million Estimate of Fuel Storage Costs $ 49.7 million Less: Fuel Star. Costs during 2016-2020 $ 4.4 million "To Go" Fuel Storage Costs $ 45.3 million Estimate of ISFSI Decommissioning Costs $ 5. 7 million Estimate of Site Restoration Costs $ 99.2 million Less: Site Restor. Costs during 2016-2020 $ 1.4 million "To Go" Site Restoration Costs $ 97.8 million Total Unit 1 "To Go" Costs as of 1/1/2021 $ 184.3 million San Onofre Unit 2(2)

Estimate of License Termination Costs $1,102.4 million Less: Lie. Tenn. Costs through 12/31/2020 $ 498.8 million

'To Go" License Termination Costs $ 603.6 million Estimate of Fuel Storage Costs $ 744.0 million Less: Fuel Star. Costs through 12/31/2020 $ 423.4 million

To Go" Fuel Storage Costs $ 320.6 million Estimate of ISFSI Decommissioning Costs $ 20.3 million Estimate of Site Restoration Costs $ 570.3 million Less: Site Restor. Costs through 12/31/2020 $ 112.2 million "To Go" Site Restoration Costs $ 458.1 million Total Unit 2 To Go" Costs as of 1/1/2021 $1,402.6 million 2

San Onofre Unit 3(2)

Estimate of License Termination Costs $1,092.0 million Less: Lie. Tenn. Costs through 12/31/2020 $ 498.4 million "To Go" License Termination Costs $ 593.6 million Estimate of Fuel Storage Costs $ 783.5 million Less: Fuel Stor. Costs through 12/31/2020 $ 424.2 million "To Go" Fuel Storage Costs $ 359.3 million Estimate of ISFSI Decommissioning Costs $ 20.3 million Estimate of Site Restoration Costs $ 805.5 million Less: Site Restor. Costs through 12/31/2020 $ 137.5 million

'To Go" Site Restoration Costs $ 668.0 million Total Unit 3 "To Go" Costs as of 1/1/2021 $1,641.2 million The site-specific decommissioning cost estimates for San Onofre Units 1, 2, and 3 and the San Onofre ISFSI include: (1) the cost to perform all decommissioning activities; (2) the cost of meeting the 10 CFR 20.1402 radiological criteria for unrestricted site use; and (3) adequate contingency factors for all costs.

2) Each San Onofre co-owner has established one or more external sinking trust fund accounts as provided in 10 CFR 50. 75( e )( 1)(ii) for their respective shares of the San Onofre Units 1, 2, and 3 decommissioning obligation, which also includes the San Onofre ISFSI. The Decommissioning Trust Fund amounts remaining at the end of calendar year 2020 (net of pending Trust Fund withdrawals and estimated capital gains taxes) are:( 3 )( 4 X5 )

Co-Owner San Onofre Unit 1 San Onofre Unit 2 San Onofre Unit 3 SCE $ 318.3 million $ 1,161.7million $ 1,394.9 million SDG&E (5) $ 150.2 million $ 362.3 million $ 424.4 million Anaheim (5) NIA $ 47.9 million $ 47.8 million Riverside (5) NIA $ 24.2 million $ 27.0 million TOTAL $ 468.5 million $ 1,596.1 million $ 1,894.1 million

3) Each San Onofre co-owner deposits its decommissioning fund contributions into their respective external sinking fund accounts as provided in 10 CFR 50.75(e)(1)(ii). The annual amounts projected to be collected in 2021 are:

Co-Owner San Onofre Unit 1 San Onofre Unit 2 San Onofre Unit 3 SCE $ 0.0 million $ 0.0 million $ 0.0 million SDG&E (5) $ 0.0 million $ 0.0 million $ 0.0 million Anaheim (5) NIA $ 0.0 million $ 0.0 million Riverside (5) N/A $ 0.0 million $ 0.0 million TOTAL $ 0.0 million $ 0.0 million $ 0.0 million 3

4) The amounts spent on San Onofre Units 1, 2, and 3 decommissioning work performed during 2020 are summarized below:

Cost Category San Onofre Unit 1 San Onofre Unit 2 San Onofre Unit 3 License Term. $ 35.4 million $ 72. 7 million $ 68.1 million Spent Fuel Storage $ 0.9 million $ 49.6 million $ 51.5 million ISFSI Decom. $ 0.0 million $ 0.0 million $ 0.0 million Site Restoration $ 0.3 million $ 3.3 million $ 9.9 million TOTAL $ 36.6 million $ 125.6 million $ 129.5 million

5) The composite escalation rate and after-tax investment rates of return for San Onofre Units 1, 2, and 3 Decommissioning are summarized below:

Compqsite Rate San Onofre Unit 1 San Onofre Unit 2 San Onofre Unit 3 Rate of Return 3.32% 3.49% 3.49%

Escalation 2.68% 2.93% 2.93%

Real Earnings Rate 0.64% 0.56% 0.56%

The composite investment rates of return less the composite escalation rates yield composite real earnings rates less than the 2% real rate of return allowed under 10 CFR 50.75(e)(1 )(ii).

6) None of the co-owners of San Onofre Units 1, 2, and 3 or the San Onofre ISFSI is relying on any contracts for the purposes of providing decommissioning funding pursuant to 10 CFR 50.75(e)(1 )(v). There have been no modifications to the method of providing financial assurance.

7) The amounts of decommissioning funds available as of December 31, 2020 for San Onofre Units 1, 2, and 3 License Termination, Site Restoration, Spent Fuel Management, and ISFSI Decommissioning costs are shown in the tables below:<4)

Estimated "To Go" San Onofre Unit 1 Decommissioning Cost 12/31/2020 Cost Ratios Net Trust Balance License Termination Costs $ 35.5 million 19.2% $ 90.0 million Spent Fuel Management Costs $ 45.3 million 24.6% $ 115.1 million ISFSI Decommissioning Costs $ 5.7 million 3.1% $ 14.6 million Site Restoration Costs $ 97.8 million 53.1% $ 248.8 million TOTAL $ 184.3 million 100.0% $ 468.5 million 4

Estimated

To Go" Cost 12/31/2020 San Onofre Unit 2 Decommissioning Ratios Net Trust Balance Cost License Termination Costs $ 603.6 million 43.0% $ 686.9 million

~pent Fuel Management Costs $ 320.6 million 22.9% $ 364.8 million ISFSI Decommissioning Costs $ 20.3 million 1.4% $ 23.1 million Site Restoration Costs $ 458.1 million 32.7% $ 521.3 million TOTAL $ 1,402.6 million 100.0% $ 1,596.1 million Estimated "To Go" Cost 12/31/2020 San Onofre Unit 3 Decommissioning Ratios Net Trust Balance Cost License Termination Costs $ 593.6 million 36.2% $ 685.0 million Spent Fuel Management Costs $ 359.3 million 21.9% $ 414.7 million ISFSI Decommissioning Costs $ 20.3 million 1.2% $ 23.5 million Site Restoration Costs $ 668.0 million 40.7% $ 770.9 million TOTAL , $ 1,641.2 million 100.0% $ 1,894.1 million

8) Key assumptions pertaining to spent fuel storage and ISFSI decommissioning:

San Onofre Unit 1:

• Permanently retired on November 30, 1992

• 395 fuel assemblies in 17 canisters are located in the SONGS ISFSI

• 1 canister of Greater Than Class C (GTCC) waste is located in the ISFSI

• The U.S. Department of Energy (DOE) is assumed to commence transporting spent fuel assemblies in 2028<6>

• DOE will remove last SONGS Unit 1 fuel from the ISFSI by 2034 San Onofre Unit 2:

• Permanently ceased operatiqns on June 7, 2013

• 1,726 fuel assemblies in 53 canisters are located in the ISFSI

• Greater Thal") Class C (GTCC) waste will be placed in the SONGS ISFSI per schedule to be developed by Decommissioning General Contractor

• DOE is assumed to commence transporting spent fuel assemblies in 2028<6>

• DOE is assumed to remove last SONGS Units 2 & 3 fuel from the ISFSI by 2049 5

San Onofre Unit 3:

• Permanently ceased operations on June 7, 2013

• 1,734 fuel assemblies in 53 canisters are located in the ISFSI

• Greater Than Class C (GTCC) waste will be placed in the SONGS ISFSI per schedule to be developed by Decommissioning General Contractor 6

• DOE is assumed to commence transporting spent fuel assemblies in 2028( l

• DOE will remove last SONGS Units 2 & 3 fuel from the ISFSI by 2049 San Onofre ISFSI:

• The San Onofre ISFSI is assumed be decommissioned and the remaining plant and ISFSI site is assumed to be decontaminated to meet 10 CFR 20.1402 site release criteria for unrestricted use as required to tenninate the Part 50 General License by 2051.

Notes:

(1) The current site-specific decommissioning cost estimate for San Onofre Unit 1 (2017 SONGS 1 DCE) that was submitted to the California Public Utilities Commission (CPUC) on March 15, 2018, includes the radiological costs associated with terminating the site license, site restoration costs, and fuel storage costs.

(2) The current site-specific decommissioning cost estimate for San Onofre Units 2 and 3 (2017 SONGS 2&3 DCE) that was submitted to the CPUC on March 15, 2018 includes the radiological costs associated with terminating the site license, site restoration costs, and fuel storage costs.

(3) During the period between June 7, 2013 and December 31, 2020, SCE incurred costs of $1,034.3 million for San Onofre Unit 2 ar;id

$1,060.2 million for San Onofre Unit 3 (100% share, 2020 $).

(4) Pursuant to 10 CFR 72__,.30( e)( 5), power reactor licensees are authorized to use the financial assurance methods provided for in 10 CFR 50.75(e).

All four San Onofre co-owners recover the cost of decommissioning pursuant to cost-of-service rate regulation and, therefore, are eligible to provide assurance using the external sinking fund methoq provided for in 10 CFR 50.75(e)(1 )(ii). To the extent the decommissioning costs are fully funded and annual deposits are no longer required, the Co-Participants provide assurance using the prepayment method provided for in 10 CFR 50.75(e)(1)(i).

SCE and SDG&E are also required to accumulate sufficient funds to decommission the SONGS facility under the California Nuclear Facilities Decommissioning Act, CA Public Utilities Code Section 8321, et seq. The CPUC has construed the SONGS decommissioning obligation to include: (1) radiological decommissioning as required to 6

terminate the NRC licenses, (2) spent fuel storage (including ISFSI decommissioning), and (3) site restoration as required to terminate the SONGS site lease contracts granted by the U.S. Department of the Navy and the California State Lands Commission.

Under CA Public Utilities Code Section 8326(a)(2), SCE and SDG&E are required to update their site-specific nuclear facility decommissioning cost estimates periodically to reflect changes in decommissioning regulation, tech_nology, and economics, for the purpose of adjusting contribution levels to their decommissioning trust.

Under CA Public Utilities Code Sections 8326(b), 8327, 8328, and 8329, the CPUC periodically reviews SCE and SDG&E's site-specific decommissioning cost estimates for the purpose of considering changes in electrical rates to ensure that sufficient funds will be available for payment of all decommissioning costs. The Cities of Anaheim and Riverside are not under the jurisdiction of the CPUC.

(5) SCE is submitting information with respect to the San Onofre co-owners, SDG&E, Anaheim, and Riverside, on their behalf, and they are responsible for the completeness and accuracy of their respective information.

(6) The current site-specific decommissioning cost estimates for San Onofre Unit 1 and for San Onofre Units 2 and 3 assume that the DOE will commence transporting spent fuel assemblies in 2028. This assumption may be updated periodically due to the ongoing

• uncertainties regarding the availability of a permanent repository for spent fuel.

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