DCL-19-082, Site-Specific Decommissioning Cost Estimate
| ML19345D345 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 12/04/2019 |
| From: | Pacific Gas & Electric Co |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| DCL-19-082 | |
| Download: ML19345D345 (50) | |
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PG&E Letter DCL-19-082 Site-Specific Decommissioning Cost Estimate Dlablo Canyon Power Plant Unit 1 and Unit 2 (Redacted Version)
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I SITE-SPECIFJC DECOMMISSIONING COST ESTIMATE DIABLO CANYON POWER PLANT Unit 1 and Unit 2 December 2019 Pacific Gas and Electric
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Diablo Canyon Power Plant Site-Specific Decommi.ssioning Cost Estimate Table of Contents Acronyms....................................................................................... :............................................................ iii Executive' Summary.................................................................................................................................. 1
- 1.
Introduction and Summary............................................................................................................ 3 1.1.
Introduction.................................................................................................................................. 3 1.2.
Site Description..................................................................... -........... :..................... *............... '...... 3 1.3.
Regulatory Guidance...........,............................................... :.................. :***********************************4
- 2.
DecommlssloninQ Altematives..................................................................................................... s
- 3.
Decommissio_ning Overview......................................................................-.................................... 7
- 4.
Decommissioning Cost Estimate Methodology....................................................... ~.:............. 8 4.1.
Approach................. ::........................... {....................................................................................... 9 4.2.-
Basis of Estimate I Site-Specific Considerations................................................................. 12 4.2.1. Major Rad1o~ctive Component Removal.................................... :................................. :....... 12 4.2.2 Radiological Decontamination................................................................................................ 16 4.2.3. Site Characterization I Final Site Survey/ Remediation..................................................... 18 i
4.2.4. Waste Disposal ***************************************************************************:*********************************************21 4.2 5. Decommissioning _Staff............................................................................................................ 23 4.3.
Assumptions............................................................................................................................... 26 1
4.4.
lnflation..........................................................................................................'............................. 27 4.5.
Contingency................. ::............................................................................................................ 29 4.5.1. Definition of Contingency in Nuclear Decommissioning Context...................................... 29 I
4.5.2. Contingency for Decommissioning Cost Estimate.............................................................. 30
- 5.
Schedule of Planned Decommissioning Activities............................................................... 31 5.1.
Decommissioning Schedule.................................................................................................... 31
. 5.2.
Decommissioning Funds............................................ :.....................................,...................... 36
- 6.
Concluslo~................. :... \\............................................. '................................ :................ :.................. 41
- 8.
I References......... *.............................................................................................................................. 42 Attachments A
Decommissioning Cost Estima!e By Phase and Cost Category Page i of iii
List of Figures Diablo Canyon Power Plant Site-Specific Decommissioning Cost Estimate Figure 5-1 Diablo Canyon Power Plant Demolition and Site*Restora~ion Schedule Figure 5-2
- independent Spent Fu~I Storage lnstallati9n Demolitfon and lndepender,t Spent Fuel Storage Installation Site Restoration Schedule List of Tables Table ES-1 Diablo Canyon Power Plant Decommissioning Cost Estimate Summary Table 3-1 Diablo Canyon Power Plant Decommissioning Periods Summary Table 4-1 Concrete Requiring Radi61ogical Decontamination or Removal Table 4-2 Contaminated Equipment arid Piping Table 4-3 Waste Materjal Volumes Table 4-4 Materials Transportation a'nd Disposal Costs (2019 dollars)
Table 4-5 Labor Costs and Average Labor Requirements by Decommissioning Period (thousands-of 2019 dollars)
Table 4-6 Diablo Canyon Power Plant Units 1 and 2 Annual Escalation Rates Table 4-7 Diablo Canyon Power Plant-Decommissioning Contingency Table 5-1 Diablo Canyon Power Plant Unit 1 Decom,missioning Cash Fl9w Table 5-2 Diablo Canyon Power Plant Unit 2 De.commissioning Cash Flow Page ii of iii
Acronyms CFR CPUC CSLC D&D
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J DC DCE DCPP DOE GTCC FTE HBPP HSA ISFSI MARSSIM NOT NRC PG&E PMP PSDAR SFP SNF SSC SSDCE Diablo Canyon Power Plant Site-Specific Decommissioning Cost Estimate Code of Federal Regulations California Public Utilities Commission California State Lands Commission decontamin_ate and dismantle Diablo Canyon decommissioning cost estimate Diablo Canyon Power Plant Department of Energy greater than Class C Full-Time Eq'uivalent Humboldt Bay Power ~lant historical site assessment independent spent fuel storage installation Multi-Agency Radiation Survey and Site Investigation Manual Nuclear Decommissioning Trust Nuclear Regulatory Com.mission Pacific Gas and Electric Comp~ny project management plan Post-Shutdown Decommissioning Activities Report spent fuel pool spent 'nuclear-fuel systems, structures, and components Site-Specific Decommissioning Cost Estimate
-1 Page iii of iii J
Diablo Canyon Power Plant Site-Specific Decommissioning Cost Estimate
~xecutive Summary This report constitutes the site-specific decommissioning co~t estimate (SSDCE) for Diablo Canyon Power Plant (DCPP), Units 1 and 2, in accordance with the requirements of 10 CFR 50.82, "Termination of license," paragraphs (a)(4)(i), (a)(8)(iii),
and 10 CFR 50.75(f)(3).
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A DCPP decommissioning cost estimate (DCE) was prepared by Pacific Gas and Electric Company (PG&E) and supmitted to the Calrfomia Public Utilities Commission (CPUC) in 2018. This DCE was submrtted to the Nuclear Regulatory Commission (NRG) as part of the DCPP Decommissioning Funding Report in 2019 (Reference 1 ).
Using the previously-submrtted DCE, PG&E prep9-red the SSDCE to meet NRG guidance and industry precedent for SSDCE format and conte~t.
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The decommissioning approach that has been selected by PG&E for DCPP is the DEGON method. While some decommissioning activities would begin after the Unit 1 shutdown, 'most decommissioning activities at the two units would begin soon after the Unit 2 shutdown and are sequenced and integrated to minimize the total cost and duration of the ptiysie:al dismantling processes.
PG&E used a dedicated team of nuclear, decommissioning, and DCPP experts to form a decommissioning plan, schedule, and associated cost estimate instead of relying on a generic nuclear-industry decommissioning unit cost factor methodology. The DCE is informed using cost-based and historical bid-based estimating, direct experience gained by PG&E after 10 years of full-scale decommissioning at HL,Jmboldt Bay Power Plant (HBPP) Unit 3, industry expertise, and benchmarking. The planning team includes experts i.n specific fields who understand the complexity and multi-discipline requirements for a project of this scale.
The cost to decommission the site, safeguard the spent fuel until it can be transferred to the Department of Energy (DOE) for storage at a permanent offsite repository, and restore the impacted area of the site is estimated to be $5.1 billion in 2019 dollars. The summary of the costs estimated for License Termination, Spent Fuel Management, and Site Restoration activities are presented in Table ES-1.
PG&E currently has more funds in the decommissioning trust fund for DCPP Units 1 and 2 than required to meet the minimum NRG decommissioning amount of
$670.2 million (2019 dollars) for each unit that was calculated pursuant to the,
requirements of 10 CFR 50.75(c).
Page 1 of 42
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Diablo Canyon Power Plant Site-Specific Decommissioning Cost Estimate A
I ID Scope Description Total Estimate License Termination
_ Unassigned Costs 1
Program Management, Oversight, and Fees
$1,547,114
$1,139,092 2
Security Operations r
$597,882
$15,367 Wasterrransportation/Material Management
$,953,944 3
(Excluding: Breakwater, Re-actor Vessel/Internal
$800,419 Segmentation, & Large Component Removal)
Discrete Costs-4 Power Block Modifications
$ 85 116
$ 85 116 5
Site Infrastructure
$ 148 417
$ 147 143 6
Large Component Removal
$ 182 004
$ 182 004 7
Reactor/Internals Segmentation
$ 363 271
$ 363 271 8
Spent Fuel Transfer to ISFSI -
$ 246 588
$ 29 217 9
Turi:>ine Building
$72,557
$ 72 557 10 Auxiliary Building
$ 97 219
$ 97 219 11 Containment
$ 127 656
$ 127 656 12 Fuel Handling Building
$51,262
$ 51,262 14 Balance of Site
$85,021
$26,644 _
15 Intake Structure
$43,664
$6,851 16 Discharge Structure
$15,867
$ 15 867 17 Breakwater
$ 299 821 18 Non-lSFSI Site Restoration
$ 142 232 19 Spent Fuel Transfer to DOE
$ 26 382 20 ISFSI Demolition and Site Restoration
$ 57 850
- GRAND TOTAL
$5,143,867
$3,159,685 Page 2 of 42
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Spent Fuel Site Management Restoration
$292,320
.I
$115,701
$ 581 402
$ 1 112
$69,267
$84,258
$1,274
$217,371
$ ~
/
$58,377
$36,813
$299,821
$142,232
$'26,382
$57,850
$1,245,867
$738,315
Dlablo Canyon Power P,lant Site-Specific Decommissioning Cost Estimate
- 1. Introduction and Summary 1.1.
Introduction This report constitutes the SSDCE for DCPP, Units 1 and 2, in accordance with the requirements of 10 CFR 50.82, "Termination of license," paragraphs (a)(4)(i),
(a)(8)(i1i) 1
, and 10 CFR 50.75(f)(3). This SSDCE contains the following:
a description of the overall decommissioning project (Section 3),
a summary,decommissioning cost estimate by major activity and phase (Section 4),
J a description of the decommissioning cost estimating methodology (Section 4),
a discussion of site-specific factors, such as staffing levels, radioactive waste volume estimates, and site characterization (Section 4.2), and a schedule of the major decommissioning activities (Section 5).
A DCPP DCE was prepared by PG&E and submitted to the CPUC in 2018. This DCE was submitted to the NRC as part of the DCPP Decommissioning Funding Report in 2019 (Reference 1 ). Using the previously-submitted DCE, PG&E prepared the SSDCE to meet NRC guidance and industry precedent for SSDCE format and content. References to the DCE are provided throughout.
The DCPP Decommissioning Funding Report submitted to the NRC in 2019 (Reference 1) also provided the minimum decommissioning fund estimate, and concludes PG&E currently has more funds in the decommissioning trust fund for DCPP Units 1 and 2 than required to meet the minimum NRC decommissioning amount of $670.2 million (2019 dollars) for each unit that was calculated pursuant to the requirements of 10 CFR 50.75(c). -
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The Irradiated Fuel Management Plan and Post-Shutdown Decommissioning Activities Report (PSDAR) are being submitted concurrently with the SSDCE. The technical, schedule, and cost information provided is consistent among these submittals.
1.2.
Site. Description The two-unit DCPP consists of a pair of Westinghouse four loop pressurized water reactors. At full capacity, Unit 1 and Unit 2 each has a thermal rating of 3,411 megawatt-thermal, with corresponding gross electrical outputs of 1, 190 megawatt-electrical. (Reference 1, Enclosure 5, Section 1.2) The current facility operating licenses for DCPP expire on November 2, 2024, for Unit 1 and August 26, 2025, for Unit 2.
The DCPP site is adjacent to the Pacific Ocean in San Luis Obispo County, California, and is approximately 12 miles west-southwest of the City of San Luis Obispo. The residential community of Los Osos is approximately 8 miles north of Page 3 of 42
Diablo Canyon Power Plant Site-Specific Decommissioning Cost Estimate the site. This community is in a coastal hillside area adjacent to Montana de 01"9 State Park. The township of Avila Beach is located down the coast at approxim~tely 7 miles southeast of the site. The City of Morro Bay is located up the coast approximately 11 miles northwest of the site. The plant is roughly equidistant between San Francisco and Los Angeles.
The principal structures of DCPP include two containment structures, turbine building, auxiliary building, radwaste buildings, administration building, training building, maintenance building, storage tanks, intake and discharge structures, and transmission switchyards. An independent spent fuel storage installation (ISFSI) is also located at DCPP that has capacity for all spent nuclear fuel (SNF) generated through the end of the operating licenses. The Diablo Canyon (DC) ISFSI is licensed under a 10 CFR 72 site-specific license.
By letter dated November 27, 2018 (Reference 2), PG&E provided formal notification to the NRC that it intends to pennanently cease power operations of DCPP on November 2, 2024, for Unit 1 EJnd August 26, 2025, for Unit 2. Once each DCPP unit has permanently ceased operation and fuel has been permanently removed from the reactor vessel, PG&E will submit written certifications to the NRC, in accordance with 10 CFR 50.82(a)(1)(ii) and 10 CFR 50.4(b)(8) and (9). Upon docketing of the certifications required by 1 O CFR 50.82(a)(1)(i) and 1 O CFR 50.82(a)(1)(ii), pursuant to 10 CFR 50.82(a)(2), the 10 CFR Part 50 licenses for DCPP will no longer authorize operation of the reactors or emplacement or retention
-of fuel in the reactor vessels.
1.3.
Regulatory Guidance Curreht regulations governing decommissioning, waste management, and spent fuel management; and the funding of those elements, include the following:
Decommissioning is defined, in part, in 10 CFR 50.2 as the safe removal of a facility 9r site from service and the reduction of residual radioactivity to levels that permit release of the site and termination of the license.
Pursuant to 10 CFR 50.51(b), each license for a facility that has permanently ceased operations continues in effect beyond the expiration date to authorize ownership and possession of the production or utilization facility, until the NRC notifies the licensee in writing that the license is terminated.
Pursuant to 10 CFR 50. 75(f)(3), at or about five years prior to cessation of operations, the licensee shall submit a preliminary DCE.
Prior to, or within two years following permanent cessation of operations, the licensee is required by 10 CFR 50.82(a)(4)(i) to submit a PSDAR to the NRC.
The PSDAR must contain a SSDCE, including the projected cost of managing irradiated fuel.1 I
Pursuant to 10 CFR 50.82(a)(7) the licensee is required to notify the NRC before performing any decommissioning activity inconsistent with, or making Page 4 of 42
Dlablo Canyon Power Plant Site-Specific Decommissioning Cost Estimate any significant changes from, those actions and schedules described in the PSDAR, including changes that significantly increase decommissioning costs.
Pursuant to 10 CFR 5Q.82(a)(8)(iii), within 2 years following permanent cessation of operations, if not already submitted, the licensee shall submit a SSDCE.
In accordance with 10 CFR 72.30, licensees *must have a proposed decommissioning plan for the ISFSI site and facilities that includes a cost estimate for the plan. The plan should contain sufficient information on the proposed practices and procedures for the decontamination of the ISFSI and for the disposal of residual radioactive materials after all spent fuel, high-level radioactive waste, and reactor-related greater than Class C (GTCC) waste have been removed..
Use of the decommissioning funds is limited by 10 CFR 50.82(a)(8)(i) to legitimate decommissioning expenses that neither reduces the value of the trust fund below that necessary to place and maintain the reactor in a safe storage condition if unforeseen conditions or expenses arise, nor inhibits the ability of the licensee to complete funding of any shortfalls in the trust needed to ensure the availability of funds to ultimately release the site and terminate the license.
As provided in 10 CFR 50.82(a)(8)(ii), a licensee may withdraw funds from the decommissioning tru~t up to a cumulative total of three percent of the generic amount calculated under 10 CFR 50.75 for decommissioning planning purposes at any time.
After submittal of the certifications of permanent cessation of operations and fuel removal required und~r 10 CFR 50.82(a)(1) and commencing 90 days after the NRC has received the PSDAR, the licensee may use an additional 20 percent of the-decpmmissioning. funds prescribed in 10 CFR 50. 75( c) for decommissioning p1urposes. The licensee is prohibited from using the remaining n percent of the generic decommissioning funds until a SSDCE is submitted to the NRC.
Regulatory Guide 1.202, "Standard Format and Content of Decommissioning Cost Estimates for Nuclear Power Plants," (Reference 3) and NUREG-1713, "Standard Review Plan for Decommissioning Cost Estimates for Nuclear Power Reactors," (Reference 4) provide the standard format and content to faci~itate preparation and NRC review of required cost estimates.
- 2. Decommissioning Alternatives The NRC has evaluated the environmental impacts of three general strategies for decommissioning power reactor facilities in NUREG-0586, "Final Generic Environmental Impact Statement on Decommissioning of Nuclear Facilities:
Supplement 1, Regarding the Decommissioning of Nuclear Power Reactors" (Reference 5). The three general methods evaluated are summarized as follows!'
DEGON: The systems, structures, and components (SSCs) that contain radioactive contaminants are promptly removed or decontaminated to a level Page 5 of 42
Diablo Canyon Power Plant-Site-Specific Decommissioning Cost Estimate that pennits tennination of th_e 10 CFR.50 license shortly after cessation of operations.
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SAFSTOR: Afte*r the plant is shut down and defueled, the facility is placed in a _safe, stable condition and maintained in that state (safe storage). The facility is decontaminated and dismantled at the end of the storage period to levels that permit 10 CFR 50 license termination. During SAFSTOR, a facility is left intact, or may be partially dismantfed, but the SNF is removed from the reactor vessel, and radioactive liquids are drained from systems and components and then processed. Radioactive decay occurs during the SAFSTOR period, thereby reducing the quantity'of contamination and radioactivity that must be disposed of during decontamination and dismantlement.,
ENTOMB: Radioactive SSCs are encased in a structurally-long-lived \\
substance, such as concrete: The entombed structure* is appropriately maintained, and continued surveillance is carried out until the'radioactivity decays to a level that permits termination of the 10 CFR 50 license.
The decommissioning approach that has been selected by PG&E for DCPP is the QECON method. While some decommissioning activities would begin after the Unit 1 shutdown, most decommissioning activities at the two units would begin soon after the Unit 2 shutdown and are sequenced and integrated to minimize the total cost and duration of the physical dismantling processes (Reference 1, Enclosure 5, Section 1.5). DCPP decommissioning includes: permanent removal of fuel from the reactors-; transfer SNF to the DC ISFSI; decontaminate and dismantle (D&D) SSCs to.levels thqt permit li_cense termination; and restore non-DC ISFSI site ar~as. In accordance'with 10 CFR 50.82(a)(9), a license termination plan will be developed and submitted for NRG approval at least two years prior to termination of the licenses (Reference 1, Enclosure 5, Section 1.4.1 ). 10 CFR 50 license termination is targeted for approximately 13 years after Unit 2 shutdown. After SNF and GTCC waste are transferred to the DOE for storage at a permanent offsite repository, the DC 1.SFSI will be decommissioned in accordance with 1 O CFR 72,. and the. site restored (including biological monitoring), within an additional 9 years. (Reference 1,, Figures 5-1 and 5-2) -
The decision to transition to im~ediate. DE CON is consistent with the CPUC and stakeholder preference and is also in the best interest of PG&E's customers because the total cost of decommissioning can be reduced by direct transition to decommissioning immediately upon plant shutdown. PG&E determined that immediate transition to decommissioning is more cost-effective than the SAFSTOR
. strategy based on the following considerations:* (1) the operating licenses are terminated earlier; (2) earlier security staff and emergency plan reductions due to security modifications and earlier transfer of SNF to the DC ISFSI; (3).benchmarking experience of other plants supports more efficient resolution of technical challenges; I
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Diablo Canyon Power Plant Site-Specific Decommissioning Cost Estimate and (4) availability of experienced, in-house staff (Reference 1, Enclosure 5,
.Section 1.5).
Typically, initial planning efforts detailing the decommissioning process can take 18 to 24 months afte~ reactor shutdown before physical decommissioning begins. To support a direct transition to immediate OECON, PG&E plans to leverage the CPUC's early approyal of DCPP shutdown in 2024 and 2025 to continue decommissioning planning arid permitting activities from 2019 to 2024. The
_ planning would streamline the d_ecommissioning effort, reduce decomm'issi.oning costs, and accelerate the schedule by allowing the majority of physical I
decommissioning of portions of the site to begin shortly after the Unit 2 permanent shut down. This also would shorten the overall decommissioning schedule. Industry experience indicates that early, detailed preparation and planning reduces the duration and cost of decommissioning while enhancing safety and efficiency (References 6 and 7). (Reference 1,- Enclosure 5, Section 1.5)
- 3. Decommissioning Overview DCPP expects ~o conduct decommissioning of DCPP in the following periods presented in Table 3-1.
T bl 3 1 Di bl C p
Pl fD
! p ri d s Period ; Period Title Period Period General Description Start Finish 1
Pre- -
Dec 2010 Oct 2024 Consists of detailed planning, engineering, Shutdown l
contracting, licensing, and permitting efforts.
Planning 2
Power Block Nov 2024 Apr 2027 Transitions the plant to a decommissioning Modifications configuration to support safe and efficient decommissioning.
3 Wet Storage May 2027 Jun 2032 Designates the timeframe where SNF is cooling in the spent fuel pools (SFPs) and/or is being transferred to the DC ISFSI. Concurrently, preparations are being made for major D&D in I
the next period.
4 Building Jul2032 Apr2035 Consists of D&D of radiological SSCs. Also Demolition includes removal of several ancillary (non-radiological) structures.
5 Site May 2035 Dec 2038 Includes demolition of non-radiological Restoration structur~, conduct of final radiological surveys to support license termination, and restoration of non-lSFSI areas. Period ends with 10 CFR 50 license termination..
6
-ISFSI Jan 2039 Aug 2067 Designates the timeframe after 10 CFR 50 Operations license-termination-where SNF and GTCC
- waste are stored only a.t the DC ISFSI and transferred to the DOE for storage at a permanent offsite repository. This period also Page 7 0f 42
Diablo Canyon Power Plant Site-Specific Decommissioning Cost Estimate Period ! Period Title Period Period General Description Start Finish includes biological monitoring of the plant site restoration.
7 ISFSI Sep 2067 Jan 2076 Consists of removal of ISFSI structures, Restoration pennitting, conduct of final radiological surveys for ISFSI license tenn1nation, restoration of affected areas, and biological monitorinQ.
Reference 1, Enclosure 3
- 4. Decommissioning Cost Estimate Methodology The DCE (Reference 1, Enclosure 5) is divided into three NRG-defined cost categories (or phases) - License Termination, Spent Fuel Management, and Site Restoration. Within each category, costs were estimated by scope of work (Reference 1, Enclosure 5, Section 4.1).
License Termination: Costs that are consistent with "decommissioning" as. defined by the NRG in its financial assurance regulations (i.e., 10 CFR 50.75). The cost reported for this category is generally sufficient to terminate the plant's operating licenses, recognizing that spent fuel management represents an additional cost liability that will interact with the license termination effort.
Spent Fuel Management: Costs associated with the containerization and transfer of spent fuel from the SFPs to the DC ISFSI and the transfer of casks from the DC ISFSI to an approved offsite location. Costs also are included for the operations of the SFPs, management of the DC ISFSI until all SNF and GTCC waste is transferred to an approved offsite location, demolition of the DC ISFSI, and restoration of the associated area.
Site Restoration: Costs associated with the dismantling and demolition of buildings and facilities demonstrated to be free from radiological contamination. This includes structures never exposed to radioactive materials,- (such as office buildings), as well as those facilities that have bee.n decontaminated to appropriate levels. Structures are removed to a depth of three feet (unless noted otherwise in Reference 1,, Section 4.1.3.2) and backfilled to conform to local grade.
-The cost to decommission the site/ safeguard the spent fuel and GTCC waste until it cari be transferred to the DOE for storage at a permanent offsite repository, and restore the impacted area of the site is estimated to be $5.1 billion in 2019 dollars.
The summary of the costs estimated for License Termination, Spent Fuel Management, and Site Restoration activities)are presented in Table ES-1.
A further discussion of cost estimate development, categorization, and site-specific consideratio.ns are provided in the subsections below.
Page 8 of 42
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Diablo Canyon ~ower Plant
( Site-Specific Decommissioning Cost Estimate 4.1.-
Approach PG&E used a dedicated team of nuclear, decommissioning, and DCPP experts to form a decommissioning plan, schedule, and associated cost estimate rather than relying on a gene_ri~ nuclear i_ndustty decommissioning unit cost factor methodology.
The SSDCE is based on cost-based and historical bid-based estimating, direct experience gained by PG&E after 10 years of full-scale decommissioning at HBPP Unit 3, industry expertise, and benchmarking. The planning team included experts in specific fields who understand the complexity and multi-discipline requirements for a project of this scale. This included PG&E leadership, decommissioning-*
experienced,personnel, DCPP operating plant departmental personnel, specialty contractors, corporate legal, finance, and accounting. (Reference 1, Enclosure 5, Sections 1 and 2.2)
Project management plans (PMPs) and studies were prepared to establish the site-specific baseline for decommissioning activities, costs, and an executable schedule.
PMPs were prepared to de~elop the plans for major decommissioning evolutions, while studies were prepared to gather information on specific topics. This methodology allowed PG&E to evaluate options that minimize costs while adhering to PG&E established risk minimization and safety principles.
After-each cost estimate was developed, the costs were grouped into categories (see Section 4 for a description of the categories), broken down into ~pecific milestc;mes with *specified scopes of work* (see below), and time phased using the project schedule.
Costs were further identified as discrete or unassigned. Discrete costs are those expenses that are directly attributable to an activity with specific completion criteria such as reactor pressure vessel removal or establishing a SFP island. Unassigned costs are expel)ses not easily attributed-to a discrete work scope such as staffing, waste, and transportation costs. Discrete and unassigned cost designations are identified-in Table ES-1 and Attachment A (Reference 1, Enclosure 5, Sections 6.1 and 6.2).
/\\tta~ment A provides a complete listing of the milestones and specified scopes of work and assigned each an identification number. - Below are summaries of each milestone (Reference 1, Enclosure 5, Section 6.1 ):
(1) Program Management, Oversight, and Fees:
This category includes general staff support an-d oversight, severance costs, metered energy usage, water and facility manage.ment, taxes, insurance fees, Page 9 of 42
Di~blo _Canyon Power Plant Site-Specific Decommissioning Cost Estimate regulatory arid industry fees, public engagement, radiological characterization, license termination preparation, emergency planning stc;!ffing and fees, and consumables. These costs are necessary decommissioning costs and they are not associated with a discrete scope of work.
(2) Security Operations:
This category includes th~ general se*curity staffing and associated departmental costs for the duration of the decommissioni_ng project. The security modification costs are excluded from this_ category and are included in Power Block Modrfications.
(3) Waste/Transportation:
()
This category includes costs for transportation and disposal of all waste classifications excluding those associated with Breakwater f}emoval,
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Reactor/Internals Segmentation, and Large Component Removal. Waste costs associated with those scope*s are easily segregated and can be allocated to their discrete projects. This category also includes material management*costs which includes costs for managing the sale of remaining assets.
(4) f:lower Block Modifications:
This category includes the SFP island, cold an~ dark, and security modrfications.
. These modrfications are all implemented early in the project lifecycle and will allow PG&E to either reduce staffing levels or enhance the ability to safely execute decommissioning.
(5) Site Infrastructure:
This category includes onsite and offsite infrastructure improvements required to complete decommissioning such as onsite building modrfications and Pismo Beach rail yard modifieqtions.
(6) Large Component Removal:
This category. inclu~es removal of steam generators (original and replacement),
reactor heads (original and replacement), reactor coolant pumps, main generators, main ~urbines, and other yarious large components that must be removed prior to demolition. This category also includes the transportation and disposal costs of the components.
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Page 1.0 of 42
Diablo Canyon Power Plant*
Site-Specific Decommissioning Cost Estimate (7) Reactornntemals Segmentation:
This category includes the reactor vessel and internals segmentation along with the packaging, transportation, and disposal costs. This scope *of work is highly specialized and includes the1 design and fabrication of custom tooling. *
(8) Spent Fuel Transfer to Independent Spent Fuel Storage Installation:
This category includes the procurement of storage canisters/casks for both GTCC waste and spent fuel, the cost of loading spent fuel into casks, and transferring of all casks from the fuel handling building to the DC ISFSI pad. The loading of GTCC
,, waste into casks can be found in the Reactor/Internals Segmentation scope.
(9) Turbine Building Removal:
This category includes decontamination, system and area closure, and demolition of the Unit 1 and Unit 2 turbine buildihg.
(10) Auxiliary Building Removal:
This category includes decontamination, system and area closure, and demolition of the Unrt 1 and Unit 2 auxiliary building.
(11) Containment Removal:
This category includes decontamination, system and area closure, and demolition of the Unit 1 and Unit 2 containment buildings.
(12) Fuel Handling Building Removal:
This category includes decontamination, system and area closure, and. demolition of the Unit 1 and Unit 2 fuel handling building.
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(13) Not Used. Original scope included in this milestone was relocated into another milestone during cost estimate developm~nt.
(14) Balance of Site Removal:.
This category includes decontamination, system and area closure, and demolition of all remaining common and unit specific structures.
(15) Intake Structure Removal:
This category includ~s installation of a coffer dam inside the breakwater.lagoon, system and area closure, demolition *of the intake structure, and removal, of the coffer dam.
Page 11 of 42
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Diablo Canyon Power Plant Site-Specific Decommissioning Cost Estimate (16) Discharge S.tructure Removal:
/
This category includes installation of a coffer dam around the discharge structure, deC<?ntamina_tion, system and area closure, demolition of the,discharge structure, and removal of the coffer dam.
(17) Breakwater Removal:
This category includes demolition, 'transportation, and disposal of the east and west breakwaters.
(18) Non-Independent Spent Fuel Storage Installation Site Restoration:
This category includes underground utility and structure demolition, soil remediation, final site survey, and final grading, landscaping, and re-vegetation of the non-lSFSI portion of the site.
(19) Spent Fuel Transfer to Department of Energy:
This category includes the tra~sfer of spent fuel and GTCC waste casks to the DOE.
(20) Independent Spent Fuel Storage Installation Demolition and Site Restoration:
This category includes underground utility and structure demolition, soil remediation, final site survey, and final grading, landscaping,_ and revegetation of the ISFSI portion of the site.
4.2.
Basis bf Estimate/Site-Specific Considerations I
Regulatory Guide 1.202 (Reference 3) and NUREG-1713 (Reference 4) delineate the items to be addressed in the SSDCE. PG&E has addressed these items in the sub~ections that follow.
4.2.1.
Major Radioactive Component Removal The DCE provided in Reference 1, Enclosure 5 pro.vides a significant amount of information regarding the process of removing radioactive components.
Reference to-these sections *for additional information is included below.
Estimated costs for the following are provided in Attachment A:
Reactor Coolant Loops: Removal is designated as system and area closure work scope and is accounted for in the respective containment building unit specific cost line items 11.02 and 11.05. Decontamination is acc.ounted for in line items-11.01 and 11.04 and packaging and transportation of the waste is captured in line item 3. See Reference 1,, Section 4.1.1.6.1 for a detailed description of containment building system and area closure.
Page 12 of 42
Diablo Canyon Power Plant Site-Specific Decommissioning Cost Estimate Reactor Coolant Pumps: Line item 6.05 addresses removal~
decontamination, packaging, and disposal. See Reference 1,, Section 4.1.1.6.1 for a detailed description of removal plans.
Bioshield: The bioshield is comprised of mainly concrete and rebar.
Therefore, its removal is designated as building demolition work scope. This work is accounted for in. the respective containment unit specific demolition cost line items 11.03 and 11.06. Decontamination is accounted for in line items 11.01 and 11.04 and packaging and
~
transportation of the waste is captured in* line item 3. Se~ Reference 1,, Section 4.1.1.6.1 for a detailed description of containment demolition.
Pressuriz,r: Line item 6.06 addresses removal, decontamination, packaging, and disposal. See* Reference 1, Enclosure 5, Section 4.1.1.6.1 for a detailed description of removal plans.
/
Steam Generat~rs:, Line item 6.03 addresses removal, decontamination, packaging, and disposal. See Reference 1, Enclosure 5, Section 4.1.1.6.1 for a detailed description of removal plans.
- 'Reactor Vessel and Internals: Line item 7 addresses* removal, decontamination, packaging, transportation, and disposal. See Reference 1, Enclosure 5, Section 4.1.1.4 for a detailed description of these plans.
Control Rod Drive System: Removal will take place. with the reactor heads. Cost line item 6.04 addresses.removal, decontamination, packaging, and disposal.* See Reference 1, Enclosurff 5, Section 4.1.1.6.1 for a detailed description of these plans.
Spent Fuel Racks: Removal is designated as system and area closure work scope and is accounted for in the respective fuel handling building unit specific cost line items 12.02 and 12.05.' Decontamination is accounted for in *line items.12.0~ and 12.04 and packaging and transportation* of the waste is captured in line item 3. See Re~erence 1, Enclosure.5, Section 4.1.1.6.4 fot a detailed description of fuel.handling building system and area clo~ure.
Page 13 of 42
/
I' Diablo Canyon Power Plant Site-Specific Decommissioning Cost Estimate Spent Fuel Pool Cooling System: Removal is designated as system and area closure' work scope and is accounted for in the respective fuel
_ handling building unit specific cost line items 1.2.02 and 12.05.
Decontamination is accounted for in line items 12.01 and 12.04 and packaging arid transportation of the waste is captured in line item 3: See Reference 1; Enclosure 5, Section 4.1.1.6.4 for a detailed description of fuel handling building system and area closure.
Spent Fue, Pool Liner: Removal is designated as bui.lding dem~lition work scope and is accounted for in the respective fuel handling building unit specific.demolition cost line items 12.03 and 12.06. Decontamination is accounted for in line items 12.01 and 12.04 and packaging arid, transportation of the waste is captured in line item 3. See Reference 1,, Section 4.1.1.6.4 for a detailed description of fuel handling building demolition.
Drain'ing and Processing of Spent Fuel Pool Water and Boron Waste:
The capat;>ility to process radiologically contaminated water is a necessary function during decommissioning. Existing liquid radiological waste facilities will be remove~ from service approximately 18 months after both
- units are shut down. Until that occurs, r11uch of the liquid radiological waste inventory will be processed through this existing system. Because the water volume in the SFPs will need to be maintained for years after both units are shut down until all SNF and GTCC waste is transferred to the ISFSI, temporary liquid radiological waste and dilution systems will be installed to dispose of the SFP water and additional contaminated water in accordance with 1 O *cFR 20 Appendix B limitations. Costs for these new temporary systems are contained in line item 1.09. See Reference 1,, Section 4.1.1.2.2 (page 154) for a detailed description of radiological waste water processing.
Contaminated Cranes: Removal is designated as building demolition work scope and is accounted for in the respective building unit specific demolition cost items x.03 and x.06 (where xis the identification for each building in line items 9 through 12). Decontamination is accounted for in line items x.01 and x.04 and packaging anc~ transportation of the waste is captured in line item 3. Removal, decontamination, packaging, and disposal of the containment manipulator cranes is designated in line item 6.07. See Reference 1, Enclosure 5, Sections 4.1.1.6 and 4.1.3.2 for detailed descriptions of building demolition.
Page 14 of 42.
Diablo Canyon Power Plant Site-Specific Decommissioning Cost Estimate Turbine Generator(s): Line item 6.08 addresses removal, decontamination, packaging, and disposal. See Reference 1,, Section 4.1.1.6.2 for a detailed description of turbine building demolition.
- ~ Turbine Condenser(s): Line item 6.11 addresses removal, decontamination, packaging, ~nd disposal. See Reference 1,, Section 4.1.1.6.2 for a,detailed description of turbine building demolition.
Moisture Separator Reheaters: Line item 6.11 addresses removal, decontamination, packaging, and disp9sal. See Reference 1, ; Section 4.1.1.6.2 for a detailed description of turbine. building demolition.
Feedwater Heaters: Line item 6.11 addresses removal, decontamination, packaging, and disposal. See Reference 1, Enclosure 5, Section 4.1.1.6.2 for a detailed description of turbine building demolitior,.
Feedwa:ter Condensate System: Remoyal is design_ated as building demolition work scope and is accounted for in the respective turbine building unit specific demolition cost line items 9.03 and 9.06. Prior to demolition, the components will be made safe for removal during system and area closure that is accounted for in line items 9.02 and 9.05.
Packaging and transportation of the *waste is captured in line item 3. See 1 Reference 1, Enclosure 5, Section 4.1.1.6.2 for a detailed description of turbine building demolition. '
Feedwater Pumpsffurbine Drives: Removal is designated as building demolition work scope and is accounted for in the respective turbine building unit spedfic demolition cost line items 9.03 and 9.06. prior to demolition, the components will be made safe for removal during system and area closure that is accounted for in line items 9.02 and 9.05.
Packaging and transportation of the waste is captured in line item 3. See Reference 1, Enclosure 5, Section 4.1.1.6.2 for a detailed description of turbine building demolition.
Floor Drains: Removal will occur with the structures during building demolition. If they are embedded in the portions of concrete foundations Page 15 of 42
Diablo Canyon Power Plant
(
Site-Specific Decommissioning Cost Estimate that are not being-removed (i.e., the base slal5s and exterior walls of the auxiliary and turbine buildings), then they will be sampled and decontaminated if possible, and abandoned with the foundation. If they cannot be decontaminated successfully, they will be locally removed frdm those foundations prior to abandonment. )"he costs for removal of the floor drains is therefore captured in the building demolition line items x.03 an-d x.06 (where xis the identification for each building in line items 9 through 12) for eaQh individual affected structure. Decontaminati_on is accounted for in line items x.01 and x.04 and packaging and transportation of the waste is captured in line item 3. See Reference 1,, Sections 4.1.1.6 and 4.1.3.2 for detailed descnptions of building demolition.
- - Heating, Ventilation, and Air Conditioning Ducts, Equipment:
Removal is designated as building demolition work scope and is acco.unted for in the respective building unit specific demolition cqst items x.03 and x.06 (where x is the identification for each building in line items 9 through 12). Decontamination is accounted for in line items x.01 and x.04 and packaging and transportation of the waste is captured in line item 3. See Reference 1, Enclosure 5, Section 4.1.3.1.4 for detailed '
descriptions of building demolition.
4.2.2.
Radiological Decontamination As discussed in Reference 1, Enclosure 5, Section 4.1.1.3.2, after ~emoval,
- remediation, and/or abatement of all known hazardous and/or regulated materials, there are two remaining scopes of work related to building decontaminatior;i.,
l Before open-air structural demolition, structures are prepared by applying either a fixative and/or*some other form of lockdown media to seal off
- 1oose radiological contamination to prevent the migration of loose radiological contamination during-demolitior activities in the form of airborne radiological contamination.
After demolition is complete, remaining surfaces of a structure that will be left in-place will be radiologically 9econtaminated.
- The decontamination will support final status survey *ope,rations and the follow-up independent r'
third-party confirmatory surveys before 10 CFR Part 50 licenses are terminated (see Section 4.2.3 below).
Structural surfaces (concrete or steel) will be radiologically decontaminated to accomplish either of the following:
Page 16 of 42
Diablo Canyon Power Plant Site-Specific Decommissioning Cost Estimate Prepare a structure for open-air demolition when the application of either fixative or some other form of lockdown media is deemed insufficient to seal off loose contamination.
Remediate remaining structural surfaces to the site-specffic Derived Concentration Guideline Level, thereby enabling and(facilitating termination of the 10 CFR Part 50 licenses.
Remaining concrete surfaces of impacted structures will be decontaminated by removing concrete either by scabbling or other abrasive means in accordance with the structure's NUREG-1575, Multi-Agency Radiation Survey and Site,,,,
Investigation Manual (MARSSIM) (Reference 8) Classification. Similarly, remaining structural steel surfaces of impacted structures will be decontaminated to a bare bright finish by either abrasive blasting or mechanical abrading in accordance with the same MARSSIM Classification. See Reference 1,, Section 4.1.1.3.2 for detailed description of building decontamination.
/
(
To supp6rt a decontamination cost estimate, PG&E used plant drawings and subject matter experts to estimate the amount of contaminated concrete (see Table 4-1) and determine contaminated equipment (Table'4-2).
Table 4-1: Concrete Requiring Radiological Decontamination or Removal Containment 242,014 5,042 3,560,000 Turbine 51,470 1,072 386,000 Auxiliary 129,988 2,708 1,840,000 Fuel Handling 4,084 85 Discharge Piping 7,,854 164 164 Misc. Buildings 1,216,545 Total contaminated 7,002,709 concrete removed from site Page, 17 of 42
Diablo Canyon Power Plant Site-Specific Decommissioning Cost Estimate Table 4-2: Contaminated Equipment and Piping 42 069 ft.
Tanks of all sizes 87 161 40 onents 172 In addition to surface decontamination, PG&E evaluated various methods available for reducing the radioactive source tenn in contaminated systems exposed to radioactive fluids. The DCE includes costs in the respective building unit specific decontamination Attachment A line items 10.01, 10.04, 11.01, and 11.04 for performing chemical decontamination of the reactor co*olant piping, I
pressurizer, chemical volume and control system, and residual heat removal system to reduce worker exposure during the decommissioning work.
Reference 1, Enclosure 5, Section 4.1.1.3.3 provides additional details on the decontamination evaluation process and results.
Reference 1, Enclosure 5, Section 4.1.3.2 provides a description of the buildings inside the radiologically controlled area. As noted in Section 4.2.3 below, there are curr~ntly not any known inaccessible areas that may contain radiological contamination.
4.2.3. Site Characterization/Final Site Survey/Remediation Site characterization will be conducted in two phases: (1) a preliminary characterization during plant operations, and (2) a post-shutdown site characterization. Once physical dismantlement and any necessary decontamination is completed for a given area, final status surveys are conducted to demonstrate that an area conforms to the radiological release criteria for license tennination. Furthermore, remediation may be necessary to meet regulatory requirements. Each topic is discussed below.
Preliminary Characterization (Reference 1, Enclosure 5, Section 2.3)
A historical site assessment (HSA) was perfonned for the site in 2018. This investigation collected infonnation regarding the site historyJrom the start of operations to the present and used the following sources of infonnation:
ahnual environmental reports annual effluent reports Page 18 of 42
Diablo Canyon Power Plant Si~-Specific Decommissioning Cost Estimate I
licensee event reports 10 CFR 50.75(g) files groundwater sampling data radiation survey data area and boundary locations for radiological areas corrective action reports I
personnel interviews The HSA identi~ed potential non-radiological contamination (i.e., petroleum hydrocarbons, asbestos, and lead paint) and potential radioactive contamination.
Both radiological and potenti'al non-radiological contamination warrant additional i,nvestigation as part of the site characterization plan to be performed upon plant r
shutdown. Based on the results of the HSA, there are currently not any known inaccessible areas that may contain radiological contamination. See Reference 1, Enclosure 5, Section 2.3 for examples of radiological and non-radiological findings.
, (
Regulations require minimizing, preventing, and documenting both radiological and chemical-related contamination am:f spill events. Robust programs and initiatives are in place to minimize and prevent both. They include:
the 2006 Nuclear Energy Institute groundwater protection initiative (GPI 07-007}, which establishes standards for sampling and reporting groundwater monitoring; the Buried Piping Program, which analyzes and inspects below-grade piping; the Radiological and Environmental Monitoring Program, which monitors for radioactive contamination in the environment; the Effluents Control Program administered by the Offsite Dose Calculation Manual, which regulates and monitors radioactive effluents; the Spill Prevention.Countermeasure and Control Prag-ram, which catalogs and develops procedures and controls to prevent hydrocarbon spills;and the Storm Water Pollution Prevention Plan, which controls site exposure to rainfall and potential pollutants As a result of these initiatives, all fe.asible efforts are being made to prevent chemical or radiological contamination that could ham, humans and/or the environment. If a significant spill occurs, the event is immediately documented in the corrective action program. If a spill cannot be completely cleaned up or mitigated, the event will be documented as required by 10 CFR 50.75(g). Any Page 19 of ~2
Diablo Canyon Power Plant Site-Specific Decommissioning Cost Estimate government regulatory agency may require interim or complete cleanup of a spill or contamination event if the event could harm humans or the environment.
. Post-Shutdown Site Characterization (Reference 1, Enclosure 5, Section 4.1.1.1.4)
The approximately 750-acre industrial portion of the DCPP site will be characterized for.both radiological contamination and non-radiological contaminants of concern. Physical sampling and*analysis will occur after Unit 1 and Unit 2 are shut down. The purpose of the Site Characterization Study is, through the formal Data Quality Objectives process, to determine the extent and nature of radiological and non-radiolo,gical contamination that may exist at DCPP.
Radiological characterization will be conducted in accordance with NUREG-15.75 (Reference 8). Non-radiological hazardous characterization will be in accordance with both federal and California Environmental Protection Agency standards.
The following are the types of processes that may be used in the Srte Characterization Study:
grab sample techniques for surface soils soil boring for s.ubsurface soils coring for volumetric concrete samples smear techniques for loose surface contamination direct radiation measurements gamma radiation sp~ctroscopy liquid scintillation co.unting for tritium analysis radiochemical analysis for hard-to-detect species such as iron-55 and nickel-63 '
volumetric samples for hazardous materials analysis (for non-radiological characterization only) scrape samples* for coatings analysis (for non-radiological characterization only)
Estimated costs for site characterization are shown* in Attachment A, line 1.14.
Final Status Surveys After completing site decommissioning activities, the final status surveys will be performed to demonstrate that the remediated portion of the site (excluding the ISFSI containing the spent fuel and GTCC waste) can be released for unrestricted use and terminate the 10 CFR 50 license. The site release criteria is Page 20 of 42
Diablo Canyon P<;>w~r Plant 1 Site-Specific Decommissioning Cost Estimate defined by the MARSSIM protocol and is in general 25 millirem per year from all pathways. Adherence to the NRG-approved License Termination Plan and MARSSIM guidance will ensure that the surveys are conducted so that applicable regulatory crtteria are satisfied.
Estimated ~r'lal status survey costs are shown in Attachment A, line 18.03.
Soil Remediation (Reference 1, Enclosure 5, Sections 4.1.2.2.4 and 4.1.3.1.1) 1he extent of soil contamination within the site will be defined by the Post-Shutdown Site Characterization. Soil remediation is carried out to reduce (1) soil radioactive contamination to levels that meet NRC's radiological release crrteria for unrestricted use and (2),non-radioactive soil contamination to levels that meet the California Department Toxic Substances Control (governed by the California Environmental Protection Agency) chemical cleanup standards which will comply with federal Environmental Protection Agency water quality standards at a minimum. Soil remediation includes the logistical, planning, resources, and physical work ~equired to excavate contaminated soils in conjunction with demolition, excavation, an,d final srte restoration activrties. Estimated costs for _
soil remediation are shown in Attachment A line item 18.02.
Active groundwater remediation is not anticipated for DCPP, as groundwater monitoring has not identified trttium at the well that is used for a drinking water source (located up DC, away from the power block).
4.2.4. Waste Disposal Prior to demolition, material slated for removal will be evaluated to id.entity,what can be repurposed (or reused), recycled, or disposed of as waste. This approach minimizes costs. and is environmentally responsible. Materials
- designated for reuse will be clean_ materials tha~ have another use onsite, avoiding transportation' and disposal costs. Materials designated for recycling will' be clean materials that still possess usable valu~,bu't are not usable onsite.
These materials will be transported to a recycling facility, incurring transportation costs but no disposal costs. Offsite disposal will be considered in cases where neither reuse nor recycling are possible because the material. contains radiological (as defined by 10 CFR 20.2002 and,10 CFR 61 classifications) or hazardous/regulated _contaminants, is not suitable fof recycling, or when it is not economical.
Demolition methods. and handling techniques will,be serected to minimize cross-contan;tinating clean materials with those required to be disposed of as wastes.
To minimize cross-contamination with clean materials, the clean materials will be removed first prior to building, demolition if it will be reused, recycled, ~r Page 21 of 42
Diablo Canyon Power Plant Site-Specific Decommissioning Cost Estimate repurposed and segregated from the transportation and storage areas used for radiological or hazardous/regulated materials.,
. PG&E has evaluated the site and detailed the types and quantities of each material on site to determine the lowest cost option, including what quantities of material coy Id be reused onsite i~stead _ of shipped offsite for recycling or disposal.
- PG&E determined the estimated cost of disposal based on the type and amount of material, disposal location, and transportation method. Table 4-3 I
provides a comparison of total Class A, 8/C, and GTCC waste volumes.for DCPP decommissioning. Estimated radiological and non-radiological waste volumes, transportation details, and costs for transportation and disposal (including processing fees where applicable). are prese~ted in Table 4-4 with no contingency (Reference 1, Enclosure 5, Table 3-9 updated to 2019 dollars).
Table 4-4 also identifies the associated cost lines items in Attachment A (which include contingency). Costs for packaging low-level waste are embedded with_in Attachment A cost line item 3.01.
Table 4-3: Waste Material Volumes Class Band C GTCC Total Due to the availability of a PG&E rail spur approximately 16 miles from DCPP, PG&E plans to ship the bulk of radiological waste first by truck from DCPP to the Pismo Beach Rail Yard using intermodal containers, then the majority of the distance to the disposal site by rail using gondola railcars; however, there may 'be times when direct truck shipments will be required, such as for large*
components.
GTCC waste will be man.aged and stored onsite until the DOE accepts the waste for final disposition, or until an appropriately licensed facility becomes available.
The GTCC waste consists of material~ presenUy stored in the SFPs and waste generated during reactor internal segmentation. The segmentation plan will use
_ characterization information and ~n activation analysis to minimize the quantity of GTCC waste, and the packaging plan will reflect the segmentation plan. It is anticipated that up to 10 GTCC waste canisters will be required for the storage of GTCC waste from decommissioning activities..
Page 22 of42
Diablo Canyon Power Plant Site-Specific Decommissioning Cost Estimate
, Reference 1, Enclosure 5, Sections 3.3, 4.1.1. 7, 4.1.2.4, and 4.1.3.3 provide additional information related to waste reduction and tran_sportation and disposal
~ite options evaluated.
4.2.5.
Decommissioning Staffing and Fees Staffing Table 4-5 presents labor costs and the average labor requirements by decommissioning period as defined in Table 3-1. "Management/Support Staff' include staffing for Attachment A line items 1 and 2. "Decommissioning Crews" identifies the staffing requirements for Attachment A line items 3 through 20.
Att~chment A, Columns L and M further provide labor costs by each cost line rtem. Personnel costs are based upon established PG&E rates and established industry rates.
)
At permanent cessation of Unit 2 operations, staffing is,estimated to be reduced from current levels and is expected to decrease as the SNF is moved from the SFP to the ISFSI, and as requirements for security and emergency planning are reduced.
Fees Estimated costs for the following are provided in Attachment A. Further description of the following items are provided in Reference 1, Enclo,sure 5, Section 4.1.1.9.14.
Energy: line rtem 1.03 lnsu'rance: line item 1.04 Property Tax: line item 1.05 NRC Reviews and Fees: line rtem 1.06 Consumables: line rtem 1.17 Page 23 of 42
Diablo Canyon Power Plant Site-Specific Decommissioning Cost Estimate Table 4-4: Materials Transportation and Disposal Costs (2019 dollars)(1l Waste Waste Preferred Chosen T
T I T &
Attachment ransportat1on ota D
Type of Waste Volumes Volumes Disposal/Recycle Transportation C
Disposal Cost C
A Cost Line (tons)
(ft3)
Facility Option ost ost Items (ll Clean Waste Non-Rad Disposal 794,000 9,925,004 IMC Tipper to - - -
Combination (including BW}
Gondola 3 and 17 Non-Rad Metal Recycle 72,281 803,123 IMC on Railcar -
Portion of 3 Non-Rad Concrete Recycle 87,887 1,098,584 Direct Truck -
Portion of 3 Non-Rad Subtotal Radiological and Regulated Waste Other Regulated Waste 34,263 856,572 US Ecology Direct Truck - - -
Nevada LARW (20.2002) 231,385 5,019,379 IMC Tipper to - - -
Portion of 3 Gondola Licensed Class A 129,910 2,885,408 Combination -
Class B/C N/A..
Direct Truck -
GTCCWastes N/A N/A On-Site Storage
- 3.06 Direct Truck/
Large Component Class A 7,760 174,326 Portion of 6 Specialty RPV /RVI Activities Class A 1,735 87,460 Combination Rail/
(Containerized and bulk)
Portion of 7 Truck Class B 206..
Class C 105..
(1) Costs do not align with the Attachment A line items identified because values in Table 4-4 do not include contingency.
Page 24 of 42
Diablo Canyon Power Plant Site-Specific Decommissioning Cost Estimate Table 4-5: Labor Costs and Average Labor Requirements by Decommissioning Period (thousands of 201*9 dollars) 2 - Power Block 3 - Wet Storage 4 - Building 5 - Site 6 - ISFSI 7 - ISFSI Periods Mods Demo Restoration Operations _______. Restoration Labor Labor Labor Labor Labor Labor Labor Labor Labor Labor Labor Labor FTE Cost FTE Cost FTE Cost FTE Cost FTE Cost FTE Cost Decommissioning Crews 313
$185,703 333
$418,825 282
$179,165 158
$138,024 8
$70,014 44
. $45,662 Management/
r Suooort Staff 383
$234,022 399
$510,687 160
$125,2901 95
$100,614 34
$253,311 6
$8,168 Total 696
$419,725 732
$929,512 442
$304,456 254
$238,638 42
$323,325 50
$53,830 FfE - Full-Time Equivalents Page 25 of 42
Dia-blo Canyon Power Plant Site-Specific Decommissioning Cost Estimate 4.3.
Assumptions As discussed in greater detail in Reference _1, Enclosure 5, the following are major assumptions affecting decommissioning costs (Reference 1, Enclosure 5, Section 1.7):
Regulatory Approvals and Permits PG&E will require many regulatory approvals and permits to -decommission DCPP 1 Thes~ are critical items and require close coordination with federal, state, and local agencies. Delays in obtaining - or failure to obtain - app_roval and/or possible regulatory conditions could significantly impact estimated costs. As an example, PG&E's water management plan is based on two assumptions with major financial implications: (1) PG&E will obtain an extension of its California State Lands Commission (CSLC) lease to continue use of the intake cove and discharge structures for drawing* in ocean water and discharging waste water to the ocean; and (2) PG&E will obtain a National Pollutant Discharge Elimination System permit to allow for discharges of waste water to the Pacific Ocean duri~g decommissioning.
Failure to obtain either of these approvals would delay decommissioning and result in significant additional costs. (See Reference 1, Enclosure 5, Section 3.1 for
\\
additional information.)
California State Lands Commission Lease Requirements PG&E has a CSLC lease that requires PG&E to remove the DCPP intake structure, breakwaters, and discharge structure at the termination of the lease. While PG&E believes that removal of the intake structure and disc.harge structure is warranted, PG&E, in consultation with the community and relevant agencies, is evaluating repurposing the breakwaters. However, until PG&E has obtained final approvals, the cost of complying with the CSLC lease must be included in the estimated cost for site restoration of DCPP. (See Reference 1, Enclosure 5, Sections 2.4 and 3.2 for additional information.)
Waste Disposal PG&E's current waste disposal plan involves taking several proactive steps to minimize the volume,s of waste that must be disposed of and to utilize the most cost-effective waste disposal options. (See Reference 1, Enclosure 5, Section 3.3 for a~ditional information.)
Security PG&E has conducted a comprehensive review involving state-of-the-art software and site walk downs of DCPP security requirements pre- ~nd post-unit shutdown.
PG&E's post-shutdown security plan has been independently reviewed by a third-party expert consultant. PG&E also has !_dentified several cost mitigation measures, including (1) plant modifications which will reduce the number of necessary security Page 26 of 42
I Diablo Canyon Power Plant Site-Specific Decommissioni~g Cost Estimate personnel; and (2) affirmative steps which PG&E may take prior to the beginning of each phase of decommissioning to reduce the number of security personnel. (See Reference 1, Enclosure 5, Section 3.4 for additional information.)
/
Spent Nuclear Fuel I
The SSDCE is based on assumptions that: (1) PG&E will complete transfer of SNF and GTCC waste from the SF:Ps to the ISFSI seven years after the Unit 2 shutdown; and (2) the DOE will begin collecting SNF in the nuclear industry in 2031 and will specifically begin picking up SNF at DCPP in 2038. (See Reference 1, Enclosure 5, Section 3.5 for additional information.)
Pre-Planning PG&E will conduct significant planning for decommissioning prior to the shutdown of Unit 1. 1his early planning will permit PG&E to begin decommissioning immediately upon the Unit 2 shutdown and will result in significant cost savings. (See Reference 1, Enclosure 5, Section 4.1.1.1.1 for additional information) 4.4.
Inflation The estimates presented in this report were developed in 2017 dolla~ for the DCE (Reference 1, Enclosure 5) and escalated to 2019 dollars. Escalation of future decommissioning costs over the remaining decommissioning project life-cycle are presented in Table 4-6.
Table 4-6: Diablo Canyon Power Plant Units 1 and 2 Annual Escalation Rates Line Year PG&E Materials &
Contract Burial Other No Labor Equipment1 Labor Costs
- 1 2017 2
2018 0.0330 0.0156 0.0298 0.0670 0.0196 3
2019 0.0330 0.0179 0.0331 0.0670 0.0239 4
2020 0.0330 0.0186 0.0342 0.0670 0.0267 5'
2021 0.0330 0.0152 0.0347 0.0670 0.0255 6
2022 0.0330 0.0140 0.0343 0.0670 0.0243 7
2023 0.0330 0.0147 0.0339 0.0670 0.0233 8
2024 0.0330 0.0148 0.0337 0.0670 0.0221 9
2025 0.0330 0.0145 0.0335 0.0670 0.0213 10 2026 0.0330 0.0141 0.0330 0.0670, 0.0210 11 2027 0.0330 0.0141 0.0315 0.0670 0.0207 12 2028 0:0330 0.0140 0.0312 0.0670 0.0206 13 2029 0.0330 0.0136 0.0307 0.0670 0.0204 14 2030 0.0330 0.0131 0.0300 0.0670 0.0201 Page 27 of 42
Line No r
15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
.31 32 33 34 35 36 37 38 39 40 41 42 43 44
,45 46 47 48 49 50 51 Diablo Canyon Power Plant Site-Specific Decommissioning Cost Estimate Year PG&E Materials &
Contract Burial Labor Equipment1 Labor Costs 2031 0.0330 0.0125 0.0300 O.Q670 2032 0.0330 0.0124
' 0.0301 0.0670 2033 0.0330 0.0128 0.0301 0.0670 2034 0.0330 0.0127 0.0301 0.0670 2035 0.0330 0.0126, 0.0301 0.0670 2036 0.0330 0.0128 0.0301 0.06,70 2037 0.0330 0.0129 0.0300 0.0670 2038 0.0330 0.0130 0.0298 0.0670 2039 0.0330 0.0131 0.0298 0.0670 2040 0.0330 0.0133
. 0.0299 0.0670 2041 0.0330 0.0136 0.0300 0.0670 2042 0.0330 0.0138 0.0301 0.0670 2043 0.0330 0.0140 0.0303 0.0670 2044 0.0330 0.0143 0.0305 0.0670 2045 0.0330 0.0145 0.0306 0.0670 2046 0.0330 0.0146 0.0306 0.0670 2047 0.0330 0.0147 0.0306 0.0670
.2048 0.0330 0.0150 0.0308 0.0670 2049 0.0330 0.0147 0.0306 0.0670 2050 0.0330 0.0147 0.0306 0.0670 2051 0.0330 0.0147 0.0306 0.0670 2052 0.0330
-0.0141 0.0306 0.0670
- 2053, 0.0330 0.0147 0.0306 0.0670 2054
- 0.0330 O.OJ47 0.0306 0.0670 2055 0.0330 0.0147 0.0306 0.0670 2056 0.0330 0.0147 0.0306 0.0670 2057 0.0330 0.0147 0.0306 0.0670 2058 0.0330 0.0147 0.0306 0.0670 2059 0.0330 0.01'47 0.0306 0.0670 2060 0.0330 0.0147 0.0306 0.0670 2061 0.0330 0.0147_
0.0306 0.0670.
2062 0.0330 0.0147 0.0306 0.0670 2063 0.0330 0.0147 0.0306 0.0670 2064 0.0330 0.0147 0.0306 0.0670 2065 0.0330 0.0147 0.0306 0.0670
'2066 0.0330 0.0147 I 0.0306 0.0670 2067 0.0330 0.0147 0.0306 0.0670
.~
Page 28 of 42 Other 0.0198 0.0199 0.0202 0.0201 0.0203 0.0204 0.0205 0.0207 0.0208 0.0210 0.0214 0.0215 0.0218 0.0221 0.0223 0.0225 0.0226 0.0230 0.0227 0.0227 0.0227 1 0.0227 0.0227 0.0227 0.0227 0.0227 0.0227
- 0.0227 0.0227 0.0227 0.0227 0.0227 0.0227 0.0227 0.0227
)
0.0227 0.0227
Line i
No 52 53 54 55 56 57 58 59
- 60 61 Diablo Canyon Power Plant Site-Specific Decommissioning Cost Estimate Year PG&E Materials &
Contract Burial Labor Equipment1 Labor Costs 2068 0.0330 0.0147' 0.0306 0.0670 2069 0.0330 0.0147 0.0306 0.0670 2070 0.0330 0.0147 0.0306 0.0670 2071.
0.0330 0.0147 0.0306 0.0670 2072 0.0330 0.0147 0.0306 0.0670 2073 0.0330 0.0147 0.0306 0.0670 2074 0.0330 0.0147 0.0306 0.0670 2075 0.0330 0.0147 0.0306 0.0670 2076 0.0330 0.0147 0.0306 0.0670 2077 0.0330 0.0147 0.0306 0.0670 Other 0.0227 0.0227 0.0227 0.0227 0.0227 0.0227 0.0227 0.0227 0.0227 0.0227 Note 1 - Materials: The materials and equipment escalator for DCPP Unit 1 and 2 is based on 41 percent materials weight and 59 percent heavy equipment 4.5.
Contingency J
This section discusses contingency factors as they relate to nucl~ar decommissioning and PG&E',s contingency level used in its DCE, as discusseq in Reference 1, Enclosure 5, Section 3.6.
4.5.1.
Definition of Contingency in Nuclear Decommissioning Context Contingency in the context of forecasting nuclear decommissioning expenditures has a specific meaning: the contingency factor is meant to account for the difference between the base cost and unforeseen, but anticipated, costs. The base cost estimate defines the project scope and accounts for the known anq reasonably anticipated costs of decommissioning in the future. The contingency factor accounts for unforeseen costs within the defined activity scope (i.e., events that will occur.in the field during the implementation of the overall decommissioning work period and which are not accounted for in the base cost estimatef For example, the mechanicaHailure of.heavy equipment, tool breakage, weather delays, and the flooding of a trench are all known unknown events that increase the cost of decommissioning activities. Such cost increases are deemed to be within the scope of the decommissioning project because they occur during the conduct of an activity that is included in the base estimate. At the same time, they are unforeseeable because no one can predict when equipment will break or when the weather will cause delays (causing rescheduling of activiti,es, inef'.Flciencies in production, loss of productivity, overtime, slippages, etc.).
The events covered under contingency are often characterized as the "known I
unknowns" that will occur over the duration of a decommissioning project.
Page 29 of 42
\\
\\
2 Diablo Canyon Power Plant Site-Specific Decommissioning Cost Estimate Contingency factors in this sense reflect only one type of risk - the specific risks of increased costs resulting from conditions at the project site after the commencement of the decommissioning work. Contingency dollars provide assurance that sufficient funding is available to accomplish the intended project scope and are expected to be fully expended during decommissioning. An estimate without contingency, or an inadequate allowance for contingency, can result in significant schedule delays and increased costs associated with delays if the project is unable to proceed. This definition of contingency does not include scope changes, or "unknown unknowns" such as a change in regulatory criteria, significant natural disasters, and security or terrorist activity.
4.5.2.
Contingency for DCE PG&E evaluated current industry and regulatory guidance to determine the appropri~te contingency factor to estimate decommissioning costs. The most recent NRG guidance (Reference 9) states that:
In general, a contingency of 25 percent applied to the sum of all estimated decommissioning costs should be adequate, but in some cases a higher contingency may be appropriate. The 25 percent contingency factor provides reasonable assurance for unforeseen circumstances that could increase decommissioning costs and should not be reduced or eliminated simply because foreseeable costs are low. Proposals to apply the contingency only to selected components of the cost e~timate, or to apply a contingency lower than 25 percent, sh'ould be approved only in circumstances when a case-specific review has detem,ined there is an extremely low likelihood of1 unforeseen increases in the decommissioning costs (e.g., if the decommissioning costs are highly predictable and are established by binding contracts.)
PG&E has calculated contingency at the line item level. However, PG&E has not adjusted the overall contingency to 25 percent. Table 4-7 identifies the conti_ngency percentage adopted by PG&E for each line item cost category, with an overall contingency level of 20.ff percent. PG&E believes that thi~
contingency level is appropriate given the current stage of decommissioning.
Table 4-7: Diablo Canyon Power Plant Decommissioning Contingency 15.0%
Page 30 of 42
Diablo Canyon Power Plant Site-Specific Decommissioning Cost Estimate
- N i
C t C t
- Contingency
- o. I os a egory Factor Waste/Transportation/Material Management (Excluding:
3 Breakwater, Reactor Vessel/Internal Segmentation, & Large Com onent Removal 4
Power Block Modifications 5
Site Infrastructure 6
7 Reactor/ilntemals S mentation 8
s nt Fuel transfer to ISFSI 9
10 11 12 14 Balance of Site 15 Intake Structure 16 Dischar e Structure 17 Breakwater 18 Non-lSFSI Site Restoration 19 S ent Fuel Transfer to DOE 20 ISFSI Demolition and Site Restoration
- 5. Schedule of Planned Decommi~sioning Activities 5.1.
Decommissioning Schedule 29.8%
15.0%
15.0%
25.0%
43.2%
15.0%
. 35.9%
23.5%
24.1%
24.3%
18.8%
19.8%
17.7%
25.0%
19.1%
15.0%
19.6%
Together, the studies and PMPs were~used to develop the executable project schedule, which is part of the DCE. The project schedule provides not only a road map for systematic project execution but also the means by which to gauge progress, identify and resolve potential cost estimate problems, and promote accountability at all levels of the estimate. A schedule provides a time sequence 'tor the duration of a project's activities and aids in understanding the dates for major.
milestones and "the activities that drive 'the schedule. A project.schedule was used as a vehicle for developing a project cost baseline. (Reference 1, Enclosure 5, Section 2.2.5)
The overall decommissioning project schedule was divided into two areas as shown in Figures 5-1 and. 5-2, respectively: (1) DCPP Demolition and Site Restoration, and (2) ISFSI Demolition and ISFSI Site Restoration. The schedules provided herein.
assume that PG&E completes detailed DCPP decommissioning pre-shutdown planning and that DCPP ceases operation upon expiration of the operating licenses.
The schedule ends following DC ISFSI demolition and site restoration.
Page 31 of 42
'1 Diablo Canyon Power Plant Site-Specific Decommissioning Cost Estimate DCPP Demolition and Site Restoration (Reference 1, Enclosure 5, Section 5.2.1)
Figure 5-1 (Reference 1, Enclosure 5, Figure 5-1) provides the level 3 schedule for non-lSFSI decommissioning. As shown in Figure 5-1, the total decommissioning time for e?ch unit is minimized by parallel work activities: For example, because each unit'. has a specific shutdown date (November 2024 for Unit 1 and-August 2025 for Unit 2), the Unit 1 activities will begin while Unit 2 is still operating, including transferring the Unit -1 spent fuel from-the reactor to the Unit 1 $FP to continue cooling.
The DCPP Demolition and Site Restoration schedule depends heavily on the availability of buildings for demolition and then site restoration. For example, systems are needed to support SFP cooling until the spent fuel and GTCC waste are transferred to the DC ISFSI. The DCPP Demolition and.Site Restoration schedule is also based on key considerations such as ensuring safe working conditions and minimizing environmental impacts.
Independent Spent Fuel Storage Installation Demolition and Independent Spent Fuel Storage Installation Site Restoration (Referen~ 1, Enclosure 5, Section 5.2.1)
Figure 5-2 (Reference 1, Enclosure 5, Figure 5-2) provides the level 3 schedule for ISFSI Demolition and ISFSI Site Restoration. It includes the time that the SNF and GTCC waste will be stored at the DC ISFSI (termed ISFSI operations); as well as the period of time that the ISFSI will be demolished (after the DOE has taken possession of all materials stored at the DC ISFSI), and time for the ISFSI site to be restored. The schedule does not show the biological monitoring that ends in 2076.
The total duration of this phase is minimized by parallel work activities. This schedule depends heavily on the DOE schedule for taking possession of the DCPP SNF and GTCC waste.
l Page.32 of 42
Diablo Canyon Power Plant Site-Specific Decommissioning Cost Estimate Figure 5-1: Diablo Canyon Power Plant Demolition and Site Restoration Schedule DCPP Decommissioning Summary Schedule Unit 2 Shutdown to License Termination= 12 years, 9 months (approx)
Based on Field Work Only and Excludes ISFSI Restoration AolMly Name D.r in Montis SM Fin sh 63
- 1) MIiestones Unit 1 Shutdown Unit 2 Shutdown Zirc Fire Risk Ends/ P~wer Block Mods Complet~
S ent Fuel at ISFSI -Ad'ust PA Boundary RVI / RPV Removals Complete Building Demolitions Com lete - minus Breakwaters Part 50 LAR Approved DOE Rea for DCPP SNF & GTCC Waste Transfer Containment S tem &Area Closure _-.!!.!_erior Un i\\__1_
Auxiliary BldgAbaement & Remo,,als Containment System &Area Closure
- hterior Un ii 2 Intake Structure System &Area Closure Balance of Site System &Area Closure Turbine Bldg Abatement & Removals Containment S tem &Area Closure - Elderior Unit 1 Containment S tem &Area Closure - Elderior Unit 2 Auxiliary B!<!g tem &Area Closure Turbine Bldg System &Area Closure. Unit 2 RemediateAlpha Contamlnati ans Turbin~ldg Systel!) &Area Clo5_!1.r_l!. Unit 1 Turbine Bld_gACM Sidin!! R~m_<>vals Fuel Handling Bldg System & Area aosu re-U rit 1 Fuel Handli~ System & Area aosu re - U rit 2 Fuel Handlin Bid ACM Sidng Removals Discharge Slructure System &Area aosure Rad Waste/ Laund Bldg tem &Area Closure General Surveys & Final DecontamiJl!ti~ns Final Aux Bldg Assessment & Lead Abatement
- 3) Large Component Removals Steam Generator & Pressurizer Removals - Unit 1 MSR, FW Heater, Main Condenser & 00 Remo,,als - Unit 1 Steam Generator & Pressurizer Removals
- Unit 2 RCS Pum Removals - Unit 1 Clear RPV Head & Manipulator Crane Rem~val_:_ Unit 1 Main Exciter, Generat>r & Turbine Removals
- Unit 2 RCS Pum Removals - Unit 2 Clear RPVHead & Manipulator grane Removal. Unit 2 MSR, FW Heater, Main Condenser & 00 Remo,,als. Unit 2 RPV Head Removal & Staging for Dis osal. Unit 1 RPV Head Removal & Staging for Disposal. Unit 2
- 4) Spent Fuel Transfers & Reactor Segmentations S ent Fuel Pool Cool Ing Window S ent Fuel Pool Island Installation - Unit 1 Spent Fuel Pool Island Installation - Unit 2 RVI / RPV Demo Contractor Mobilization & Unit 1 Prep RVI Segmentation & Removal
- Unit 1 S
ntFuel/GTCCTr.ansferslo ISFSI-UnitJ Class Ald/C Waste Storage in Unit 1 SFP RPV Segmentation & Removal - Unit 1 RPV Segmentation & Removal. Unit 2 0
I o '
0 o
1 0 1
~
02-Nov-24*
2&-Aug-25*
2&-Feb-27*
]ZWUn-32*
l 17-Mar-33*
07-Jun-35*
27-Ma 38*
01-Jun-38*
07-Dec-38*
7 08-J an-26 19-Au 26
~
09-Mar-26 31-Aug-26 7
~1-Mar-26 2&-0ct-26 12 02-Jul-26 21-Jun-27 I!_ }10-Au i>-26 15-Apr -27 13 25-Nov-26 05-Jan-28 6
23-Dec-26 22-Jun-27 6
17-Jun-27 22-Dec-27 22 01-Dec-27 11-0ct-29 10 20-Dec-27 10 30-Dec-27 I
29 08-Jan-28
_g_, 11-0ct-28
~ 31-May.29 20 15-0ct-29
~
17-Jun-31 10-Se 31 01-Nov-28 1&-0ct-28 18-Jun-30 11-0ct-29 08-0ct-30 30-Jun-31 30-Sep.32 21-0ct-32 15 13 15 16 5
10 23 20-r-32 07-Jul-33 24-Aui>-32 ] 27-Dec-33 20-Dec-32 24-May..33 21-Mar-33 25-Jan-34 28-Apr-33 21-~r: 35 1 14-Jun-34 2&-Jul-34
_R 20-Au!J-26 15-Sep-27 J!.
28-0ct-26 j ~r-27
_J!_ -+ 1&-Aug-27 11-Ma -28 11 20-Sep.27 17-Aug-28 J1. J 1&-May-28 12-Jun-29 1~
13-Jul-28 J 28-Jun-29 7
21-Aui>-28 04-Apr-29
~ i 05-Apr-29 I 30-May-29 9 t 14-Jun-29 j 19-Mar-30
_J_
02-Jul-29 14-Feb-30
~ J~Feb-30 11-Apr-30 13 21-Mar-30 24-Apr-31
- 1. l ~B-Jan-31 17-Apr-31 4
19-Aui>-31 23-Dec-31 92 02-Nov-24* 24-Jun-32 10 03-Mar-25 31-Dec-25 10 02-Feb-26 25-Nov-26 2
07-Jul-30 20 04-Mar-32 11 11-Jul-31 31 05-May.33 18 15-Jul-32
~
29-Aug-33 14-Jul-31 24-Jun-32 04-Nov-31 23-Nov-32 08-Mar-32 30-Nov-32 19-Jul-32 17-Mar-33 Legend
=
Unit 1 Unit 2 =
Canmon Crltical 02-Nov-24* + Unit 1 Shu~down 2&-Aug-25* + Ui,it 2 Shutdown 2!>-Feb-27* + Zirc Fire Risk Ends/ Power Block Mo~s Complete 24-Jun-32* + Spent Fuel at ISFSI -AdjustPA Boui,dary 17-Mar-33* + RVI / RPV Removals Complete 07-Jun-35* + Buil,1ting Demolitions Complete - minus Breakwaters 27-May-38* + Part 50 LAR Approved 01-Jun-38*
DOE Ready for DCPP SNf & GTCC Waste Transfer
+ Milestone 07-D c-38' + Site Restoration Complete/ Commence Monitoring F== Chemical Decontaminations
=
Field Characterizations
- Non Rad
=
Field Characterizations* Rad
=
Containment System &Area Closur~. hterior Untt 1
=
Auxiliary Bldg Abalemert & Remo,,al~
Containment System &Area Qlosure - nterior Unt 2
=
Intake Structure System &Area Clo$ ure
=
Balanoe of Site System &Are~ Closure
====:::=== Turbine BldgAbatement&Removals
=
Containment System;&Area Closure. Elderior Unit 1 Containment System &Area Closure. ExeriorUnit 2
=
Au~liaryBldg System &Area Closure Turbine Bldg System &Area Closure - Unit 2 RemediateApha Contaminaions
====:;:* =:i Turbine Bldg System &Area Closure - Unit 1 Turbine Bldg ACM Siding RemOl(als Fuel Handling Bldg System & Ar,ea aosure. Unit 1 Fuel Handling Bldg Sys!J!m &Area aosure-U it 2 Fuel Handling Bldg;ACM Sidng Removals
=
Discharge Structure Syst~m & Area aosure
=
Rad Waste/ Laundry Bldg System &Area Closure Gene,:al Surveys & Final De ntaminations ci FinalAuxBl<tgAssessment& Lead atement Legacy Large Component Segmentation & Disposal
=
LCR Containment Openings & Lift svitems
=
Main Exciter, Generat>r &:Turbine Removals
- Unit 1
=
Steam Generator & Priissurizer Removals. Unit 1 MSR, FW Hea,ter, Main Condenser & 00 Remo,,als - Unit 1 Steam Gener~tor & Pressurizer Removals - Unit 2
=
RCS Pump Removals - Unit 1 c
Clear RPV HeJd & Manipulator Crane Removal - Unit 1 Main ~iter, Generator & Turbine Removals - Unit 2 RCS Pump Removals
- Unit 2 Clear, RPV Head & Manipulator Crane Removal - Unit 2 MSR, FW Heater, Main Condenser & DG Remqvas - Urit 2
- = RPV Head Removal & Staging for Disposal - Ui,it 1 RPVHead Removal &Staging for Dispo~al -Unit 2
====i Spent Fuel Pool Island lnsllllatlon - Unit 1 Spent Fuel Pool Island hstallation - Unit~
Page 33 of 42
'!!'!I RV) I RPV Demo Con actor Mobilization & Unit 1 Prep r*
RVI Segmentation & Removal - Unit 1
~
Spent*F~~,
CCTraisferslO ISFSI - Urit1 RVI/RPVTransportation &:Disposal
- Unit 1
~-----r-'f!'
VI Segmentation & Removal - Unit 2 RVI/RPVTransportation & Disposal
- Unit 2
-==---~pent Fuel/GTCC Traisfers ID ISF SI
RPV Segmentation & Remo~al - Unit 2 1 of2
64 Diablo Canyon Power Plant Site-Specific Decommissioning Cost Estimate DCPP Decommissioning Summary Schedule Unit 2 Shutdown to License Termination = 12 years, 9 months (approx)
Based on Field Work Only and Excludes ISFSI Restoration
- 5) Bulldlng & Structural Demolltlons Early Non Heavy Demolitions - Phase 1 230 kV & 500 kV Early Demolitions Ground Water Tank & Well Demolitions Old Steam Generator Storage Facill Demolition Admin Building Demolition Intake Structure &kea Demoltims General Non Heav Demolitions - Phase 2 Turbine Bldg Final Closure & Demolition Containment Interior Demolitions - Unit 1 Aux Bldg Demolition to Foundation Elevations Containment Interior Demolitions - Unit 2 Discharge Structure Demollti~
Ventilation/ Pen Area/ FH Bldg Demolitions - Unit 1 Containment Bldg Demolition - Unit 1 Ventilation/ Pen Area/ FH Bldg Demolitions - Unit 2 Containment Bldg Demolition - Unit 2 Radiological Waste Processing Bldg Demoliti on Final Site Area Demol itions
- 6) Site Surveys & Restorauons Zone 4 Tunnel Restorations, Demolitions & Backfils Utilities/ Structures Demo & Restoration Prep - Al l Zones Breakwater Demolitions Final Status Survey- ~ ones 10-13 Final Status Survey - Zones 1-3 &5-9 Backtll & Grading - All z~
Final Land~
lng, Re-Vegetation & Demd:>lliz.ti on Seawater Reverse Osmosis Facility Demolition
- 7) SNF and GTCC Waste Transfer to Off-Site Facll/ ty Pre-SN F and GTCC Transfer Readiness Sccpe SNF & GTCC Waste Transfer to DOE BJ Infrastructure & Support Projects General Site Security~M_ od
_ s ____ _
Bay,,;ood Feed Installations for Cold & Dark Cold & Dark Installations & Mods Bldg 117NBJG Repurp_!)se RCA L.auncty/RW Storage Bldg 116 Re~ose - Cold Machine to lnterrnodal Main!
Bid 119 Re ur ose -Admin Bldg & Communications South Access Road Moa; Reservoir Road Mods Construct ISFSI Pad Expansion Construct ISFSI Securi Building Bldg 115 Repur se-Main Whs to RW Facility Pismo Rall Spur Mods Bldg 113 Repurpose - FLEXto-Environmental fuin Sllrt Finish Monlhs 21 4
2 20 45 21-Nov-30 7
27-Sei>-32 12 01-Nov-32 26-0ct-33 IB 29-Nov-32 f 13-Jun-34 12 21-Mar-33 15-Mar-34 6
1 09-Nov-33 16-May-34 3
17-Nov-33 13-Fel>-34 9
14-Fel>-34 ~ 15-Nov-34 3
I 16-Mar-34 08-Jun-34 9
07-Jun-34 14-Mar-35 3
15-Mar-35 07-Jun-35 5
15-Mar-35 31-Jul-35 19-Apr-34 +
07-Mar-35 11 3
21-J un-34 25-Sei>-34 3
01-Ma 35 t 30-Jul-35 10 09-May-35 28-Fel>-36 39 11-Jun-35 21-Sep-38 23 07-Nov-35 13-0ct-37 16 03-Mar-36 1 25-Jun-37 16 20-0ct-36 03-Mar-38 12 22-Dec-37 07-Dec-38 22-Fel>-38 11-Mar-38 58 01-Jun-33 27-May-38 338 01-Jun-38 01-Aui>-67 15 04-Nov-24 02-Fel>-26 15 15-Jan-25 11>-Apr-26 20 27-Fel>-25 I 05-Nov-26 5
23-Jun-25 28-Nov-25
.]_
03-Nov-25 ~
May-~
27 02-Fel>-26 11-Macll!_
12 22-~_!"~26 06-May-27 7
24-Nov-26 10-Jun-27 g
22-~r-27 [ 08-Jan-28 21 04-Nov-27 07-Au 29 18 01-May-30 17 25-Sei>-30 9
23-Dec-30 01-0ct-31 Legend
=
Unit 1 Unit 2 =
Canmon Crftical
+ Milestone
=
Early Non Heavy Demolitions - Phase 1 230 kV & 500 kV Early Demolitions
= G:ound W ater Tank & Well Demolitions
= Old Steam Generator Storage f acility Demolition o
Admln Building Demoliti~n c:::::;:===::::1 lntal(e Structure &kea Demoliti ms :
=======:;'======> General Non:Heavy Demolitions - P ase 2 c::::;== Turbine Bldg Final Closure & Demolition c;:== Containment lnterior:Demolitions - Unit 1 Aux Bldg Demolition to Foundation El vations Pre-SNF and GTCC Tra~sfer Readness Sccpe Containment lnte,-ior Demolitions - Unit 2 b
Discharge Strupture Demolition b Vertilaton/ Pen ~ea / FH Bldg Demoliti ns - Unit 1
- =
Contalnm~nt Bldg Demolition - U it 1
~~
Vertlation / P~n Area/ FH Bldg Dem litions - Unit 2 r~
3 Containment Bldg Demolition - Unit 2 r,;:~
Ra~iological Waste Proce sing Bldg Demolition
)::::::J Fioal SiteArea Demol itio s
~
Zone 4 Tunnel Restorations, emolitions & Backfi ls c:::, Firlal Statui Survey-Zone 4 i = E~rlyRe-Vegelation - Z e4
! c:=::;::> Utilities/ Structure Demo & Restoration Prep -Af I Zones Breakwater Demolitioi,s L
Fi al Stai~;Survey - Zones 1 Q..j 3 Final Status suivey-Zones 1-3 & $-9 Backfill &Grading-All Zm~
Final Landscaping, Re-Vegltation & Demoblizaim Seawater Reverse Osmosl~ Facility Demolition Pre-SN F and GTCC Tran~fi!r Readiness Scope SNF & GTCC Waste Transfer to DOE*.., _________,.. ____________ -!
General Site Security Mods
===:::;::=> Bay,,;ood Feed Installations for Cold & Dark Cold & Dark Installations & Mods
= : Bldg 117NB/C Repurpose RCA Launcty/RW Storage c:;::= Bldg 116 Repurpose - Cold Machine to lnterrno~al Maint Bldg 119 Repurpose -Admln Bldg & Communications Soulh Access Road Moa;
=
Reservoir Road Mods
=
Construct ISFSI Pad Expansiim Construct ISf SI Security Building Bldg 115 Repurpose - Main Whs lo RW Fa,,:ility Pismo Rail Spur Mods i=== Bl 113 Re r
se - FLEX to Environmenial Page 34 of 42 2 of2
Diablo Canyon Power Plant Site-Specific Decommissioning Cost Estimate Figure 5-2: Independent Spent Fuel Storage Installation Demolition and Independent Spent Fuel Storage Installation Site Restoration Schedule ISFSI Restoration Schedule AoNlyName 10 11 12 13 14 15 18 17 18 19 20 21 22 23 24 25 28
'lT 28 29 30 31 32
- 2) ISFSI Site Restoration Mobilize Cmtractor - Tower and Line Removals for Ulls & struc Demo
- Balance of Sile Restoration Mobilize Demolition Contractor for ISFSI Demolition* ISFSI Decommissioning Prepare T Lnes for Utis & struc Demo - Balance of Sile Restoration Operate LaydCIM'I '!'ard
- T Line and Tower Removals for utils & Slruc Demo - Balance of Sie Restoration Demolsh ISFSI Pads-ISFSI Decommissioning Demoish Utlities and General Demollion for ISFS1 Demollion
- ISFSI Decommisslonilg Remove T Lines for Ubls & Slruc Demo - Balance of Sile Restoration Remove Towers for Utils & Slruc Demo - Balance of Sile Restoration Remove Tower Foundations for Utils & struc Demo* Balance of Ste Restoration Demobifize T &L Con tractor for Uti s & Struc Demo
- Balance of Ste R estoratbn Demoish Fences and Barriers for ISFSI Demollion
- ISFS1 DemaliCJ'I
- ISFSI Decommissioning Perform a Radiological Soil Remediation for ISFSI Sile Restoration Perform Radiological Soil RemediationAnat,ti::al tlr ISFSI Sile Restoraion Perform Chemical Sal Remediation for ISFSI Sile Restoration Demobilize Sol Remediation Contractor for ISFS1 Site Restoration Mobilization for Gradi"lg & Landscaping
- ISFSI Site Restoration S~e Preparation for Gra<ing & Landscaping* ISFSI Site Restoration Backffl and grading at Shoomg Range for Grading & Landscaping
- ISFSI Site Restoration Mass Ela;avation or North slope of ISFSI for Gradng & Landscaping* ISFSI Sile Restoration Backfiling and grading ISFSI for Grading & Landscaping* ISFSI Sie Restoration Restoration or Di1 roads for Gracing & Landscapi"lg
- ISFSI Sie Restoration Work Implementation Final Sie survey-ISFSI Sle Restoration Erosion Control Stabilization ISFSI area for Grading & Landscapng
- ISFSI Sle Restoration Revegetation Construction for Grading & Landscapng - ISFSI Sie Restoration Demobilization contractor for Fi"lal Sile SUrvey-lSFIS Sie Restoration Revegetation Demobilization br Grading & Landscaping - ISFS1 Site Restoration ISFSI S~ Restoration Complete Common -
Crlical
+ Milestone Dur in Slat Fini~
Mcdls 338 01-Jun-38 01-Au~67 27-Jun-67 01-Auit-67 02-Aug-67 06-Sep-67 r-;-
02-Aug-67 14-Sep-67 5
02-Aug-67 29-Dec-67 13 07-Sep-67 29-0ct-68 13 07-Sep-67 29-0ct-68 2
1S-Sep-67 30-Nov-67 0
01-Dec-67 13-Dec-67 14-Dec-67 29-Dec-67 03-Jan-68 07-Fel>-68 9
02-Feb-68 29-0ct-68 0
22-0ct-68 29-0ct-68 30-0ct-68 OS-Dec-68 0
13-Dec-68 20-Dec-68 26-Dec-68 14-Jan-69 1S-Jan-69 20-Fel>-69 0
21-Feb-69 21-Fel>-69 0
2S-Feb-69 04-Mar-69 OS-Mar-69 20-Mar-69 4
21-Mar-69 01-Au~69 10 21-Mar-69 04-Fel>-70 7
OS-Aug-69 11-Mar-70 4
12-Mar-70 14-Ju~70 2
18-Jun-70 OS-Au~70 1S-JuHO J 31-Ju~70 6
04-Aug-70 28-Jan-71 I---
0 06-Aug-70 06-Au~70 0
29-Jan-71 29-Jan-71 0
02-Fel>-71*
Q2 Q3 ISFSI Site Restoration Duration = 3 years, 6 months Excludes Follow-on Monitoring 20!!8 20!!9 2070 2011 20n Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q.4 Q1 Q2 Q3 Q.4 01 02 03 Q4 Q1 Q2 SNF & rec Waste Transfer t DOE Mobiiz Contractor
- Tower a Line Removals br Utils Slruc Demo* Balanc of Sie Restoration e T Lnes for Utls &
uc Demo - Balance of
- e Restoration Operate Laydown Yar
- T Line and Tower Re wals for Utils & Slruc emo
- Balance or Sile estoration
.P. tt!9n~.L~.m.e~<t,r.1. !.R~".9fmissiooog D1oitlon for ISF Demoltion
- ISFS1 Dec
& Slruc Demo* Balan e of Si~ Restoration s & struc Demo* Balan e of Silr Restoration Remwe Tow ations for Utils & Slruc erno * ~lance of Sile estoration
- Q~Q!>~ * * !-**
- rrac:torforUtRs&struc emo - ~nceofSte estoratbn
~ ----*~
!)braish Fences and Bar *ers forrSFSI Demoit'
- lrFSI Demali ontract~
- ISFSI Dem
- ISFSI Decommis Perform a Radiologica Soil Retedlation for IS SI Sile Restoration oil Riedlation Anat/1 al br ISFSI Sile Rester Renjediation for ISF Site Restoration ediatit Contractor i ISFSI Sile Restoration ding &~dscaplng - 1 Gradrg & Landscap missklrwlg ing Ql Q.4 d gra<frig at Shoding scaping
- ISFSI Site 2073 Q1 02 03 oratkn 2074 04 01 Q2 Q3 Q.4
._='*===~.Ml't1 Excavation Grading & Landscap* g
- ISFSI Sile Restorat' n
_, __...,"!!!!L.Ji!!l.2
° 'kffing and g
-~-
Landscapilg
- ISFSI of Dirt roads for Gra
& Landscapng - I urvey - ISFSI Sile R I area for Gradng &
estoration Revegetallon Cons uction for Gradi,g & La scaping
- ISIFSI Site estoration contractor for Fi al ste survey-ISIFIS e Restoration iizalion for Grading & L ndscapng
Diablo Canyon Power Plant Site-Specific Decommissioning Cost Estimate 5.2.
Decommissioning Funds 10 CFR 50.82(a)(6)(iii) sfates that, "Licensees shall not perform any decommissioning activities," as defined in 10 CFR 50.2 that, "Result in there no longer being reasonable assurance that adequate funds will be available for decommissioning." PG&E does not intend to perform any decommissioning activities that would jeopardize the availability of adequate funds for the completion of radiological decommissioning.'
Tables 5-1 and 5-2 show the amount of decommissioning funds currently available, 1
the cumulative cost estimate, and the expenditure of the funds for Units 1 and 2, respectively. (Reference 1, Enclosure 4)
I Under NRC regulations (10 CFR 50.82(a)(8)), a licensee must provide reasonable assurance that funds will be available (or financial assurance") for decommissioning (i.e., license termination) costs. The regulations also describe the acceptable methods a licensee can use to demonstrate financial assurance. Most licensees do this by funding a nuclear decommissioning trust (NOT) fund. To assure that sufficient funds will be available for decommissioning, PG&E has established separate external sinking NOT fund accounts for OCPP Units 1 ahd 2. PG&E currently has more funds in the NOT for OCPP Units 1 and 2 than required to meet the minimum NRC decommissioning amount for each unit that was calculated pursuant to the requirements of 10 CFR 50.75(c).
In addition, on September 10, 2019 (Reference 11), NRC granted exemptions from 10 CFR 50.82(a)(8)(ii) and 10 CFR 50.82(a)(8)(i)(A) to allow PG&E to withdraw
$187.8 million (2017 dollars) from the DC NOT for decommissioning planning between now and permanent cessation of operations, instead of three percent of the generic amount specified in 10 CFR 50.75. A portion of the funds will be used for pre-planning activities associated with spent fuel management and site restoration.
In accordance with 10 CFR 50.82(a)(8)(v), decommissioning funding assurance will be reviewed and reported to the NRC annually until residual radioactivity has been reduced*to a level that permits termination of the 10 CFR 50 licenses. Thefatest SSOCE adjusted for inflation, in accordance with applicable regulatory requirements,,
will.be used to demonstrate funding assurance. In addition, actual radiological and spent fuel management expenses will be included in the annual report in accordance with applicable regulatory requirements. If the funding assurance demonstration shows the NOT is not sufficient, then an alternate funding mechanism allowed by.
10 CFR 50.75(e) and the guidance provided in Regulatory Guide 1.159 (Reference 10) will be put in place.
As shown in Reference 1, PG&E is projected to be adequately funded to perform radiological decommissioning as outlined in the SSOCE.
Page 36 of 42
Year 2010 2011 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036*
2037 2038 2039 2040
- 2041 2042 2043 2044 2045 2046 2047 2048 Diablo Canyon Power Plant Site-Specific Decommissionin-g Cost Estimate Table 5-1: Diab lo Canyon Power Plant Unit 1 Decommissioning Cash Flow1 2010 - 2018 in Nominal Dollars. 2019 - 2076 in 2019 Dollars W1!m
- 1 Non-Nt<'-'
NRC Scope I
Scope (Radiological)
(Non-i Radiological).
$7 445
$55 564
$245 827
$3 375 033
$8,175,432
$1,034,409
$6 i20 203
$1,757 492
$9 949 153
$1,423,071
$12,453 978
$1,836,522
$9 970,573
$1834362
$13 392,081
$2 339 165
$30,201 082
$4 481 649
$121,354,420
$5 503,451
$106 469 508
$4,649,720
$101 182,296
$5,390 600
$89 991 711
$4 023 264
$96,182 249
$4 654 686
$102 226 552
$5,222,164
$132,720 306
$6,613,615
$189,160,159
$6,487,936
$190,381,565
$5 867,782
$160,379,360
$5 764 923
$99 866 224
$20 316 534
$34,350 918
$36,071,759
$34 377 928
$35 708 937
$28 133,442
$35,525,806
$33,534
$33,626
$33,534
$33,534
$33,534
$33,626
$33,534
$33,534
$33 534
$33 626
, Spent Fuel Management
$1,144,722
$303,689
$219 621
$377 283
$380,654
$389 783
$1,886 873
$14,811,716
$31,263 628
$25,424,465
$24,907,377
$39,509 327
$128 691 416
$55,011 838
$12,807,834
$5,423 200
$6,011 214
$7 303,084
$5 744 575
$5,377 014
$6 399,371
$6,265 973
$7 980 485
$6 265,904
$6 792 024
$6 265 904
$6,809 191
$7 437 176
$6,792,024
$6 265 904
$6 809 191 Total
$7 445
$55 564
$245,827
$3,375,033
$10,354,563
$8,781,383
$11,591,845
$14 667 783
$12 185 590
$16 121 029
$36 569 604
$141 669 587
$142 382,856
$131,997,361
$118 922 352
$140 346 263
$236,140,132
$194,345,759
$208,455,928
$201,672,547
$172,155,497
$127 485 843
$76,167,252
$75 463 879
$70,058,619
$6,299,507
$8,014,112
$6,299 439
$6 825,558
$6 299,439
$6 842 817
$7,470 711
$6,825,558
$6,299 439
$6 842,817 Page 37 of 42 Cumulative
. D Trust Account ecomm1ss1onmg F
d" E t*
t un mg s 1ma e
$7 445
$63,009
$308 836
$3 683,869
' $14,038,432
$14,038,432 Actual
$22,819 815
$34,411 660
$49,079,443
$61 265 033
$77 386 062
$113 955 666
$255,625 253
$398 008 109
$530,005,470
$648,927 821
$789 274 084
$1 025 414 216
$1 219 759 975
$1,428,215,903 $1,306,314,401 Market Value
$1 629 888 449
$1 802 043 946
$1,929,529 789
$2 005 697 041
$2 081 160 920
$2151,219 539
$2 157 519,046
$2 165 533, 158
$2 171'832 596
$2, 178 658 155'
. $2 184 957 593
$2 191,800,410
- $2,199 271121
$2,206 096,679
$2 212 396,118
$2 219 238,935
Diablo Canyon Power Plant I
Site-Specific Decommissioning Cost Estimate I
, Non-NRC Cumulative y
NRC Scope Scope Spent Fuel Total Decommissioning ear I (Radiological)
(Non-Management 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 207.1 2072 2073 2074 2075 2076 Grand Total Radiological)
Estimate
$33 534
$6,265,904
$6,299,439
$2,225 538 374
$33 534
$8 002 066
$8 035,601
$2,233 573,974
$33 534
$6 265 904
$6 299,439
$2,239 873,413
$33 626
$6 809 191
$6 842 817
$2 246,716 230
$33,534
$6,265,904
$6,299,439
$2,253,015 669
$33,534
$6,792,024
$6,825,558
$2,259,841 227
$33,534
$7,437,176
$7,470,711
$2,267,311,938
$33 626
$6 809 191
$6 842 817
$2 274,154 755
$33 534
$6 265 904
$6 299 439
$2 280,454,193
$33,534
$6,792,024
$6,825,558
$2,287,279,752
$33 534
$6 265 904
$6 299 439
$2,293,579,190
$227 658
$8 927 718
$9,155,377
"$2,302,734,567
$629,487
$7,918,327
$8,547,814
$2,311,282 381
$452,453
$9,646,994
$10,099,448
$2,321,381,829
$570,998
$9 368,324
$9,939 322
$2 331 321, 151
$361 646
$7 615 742
$7 977 388
$2 339 298,539
$346,148
$8-558,457
$8 904 604
$2 348,203,143
$243,534
$30,878,988
$31,122,522
$2,379,325,665
$298,050
$14,731,299
$15,029,349
$2,394,355,014
$366,228
$9 252,693
$9618921
$2 403,973,935
$220,103
$6 509,215
$6 729 318
$2 410 703,253
$289 652
$3 485 221
$3 7,74 874
$2 414 478,126
$6,533
$1,359,144
$1,365,677
$2,415,843,803
$1,836,551
$1,836,551
$2,417,680,354
$876 886
$876,886
$2 418,557 239
(
$876,886
$876,886
$2,419,434,125
$876,886
$876 886
$2;420 311,011
$36,036
$36,036
$2,420,347 047
$1,581,323,007
$201,225,020
$637,799,020 $2,420,347,047 NOTES:
- 2. Trust Account Value of $1,459.3 million Market Value as of 06/30/19.
Page 38 of 42
(
Trust Account Funding I
Year 2010 2011 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 Diablo Canyon Power Plant Site-Specific Decommissioning Cost Estimate Table 5-2: Diablo Canyon Power Plant Unit 2 Decommissioning Cash Flow1 2010 - 2018 in Nominal Dollars. 2019 - 2076 in 2019 Dollars Non-NRC NRC Scope Scope (Radiological) I (Non-
! Radiological)
$7 445
$55,564
$245 827
$3 375 033
$8,175,432
$1,034,409
$6 720 203
$1,757,492
$9 949 153
$1,423,071
$11 058 242
$1 836,522
$9,970 573
$1834362
$12 994 773
$4 487 181
$14 343 403
$6 262 379
$126,517,334
$17 082 734
$87 659 232
$15261,915
$117,071,544
$12,175,547
$81,960,866
$8 026 493
$107 599 959
$7 075 394
$79 636 854
$21 332,865
$97 666,934
"$19,208,798
$203,140,735
$14,148,409 I
$259,787 426
$2 573 934
$187,973,910
$17,826,475
$104 244 843
$66-493,366
$17,786 338
$105 019 964
$17 834,539
$108 489 650
,$12,586 313
$79,154 273
$1195791
$735 191
$570 725
$570 725
$585 768
$33 626
$33,534
$33 534
$33 534
$33,626 Spent Fuel Management
$1,-144,722
$303 689
$219,621
$377,283
$380 654
$389 783
$1489343
$14 915 239
$31,249,794
'$25,410 630
$24 342 270
$24 434 186
$25,611,403
$78,958,510
$20,270,194
$5 564 077
$6,144,718
$7,436,588
$5 879,532
$5 510 518
$5,870,469
$6,752 337
$7 454 383
$6 792,041
$6 265 921
$6 792 041
$6,283 088
$7,963,313
$6 265 921
$6 792 041
$6 283 088 Total
$7 445
$55 564
$245,827
$3 375 033
$10,354,563
$8 781 383
$11,591,845
$13,272,046
$12 185 590
$17 871 737
$22 095 125
$158 515 307
$134,170,941
$154 657 721
$114 329 629
$139 109 539
$126 581 122
$195,834,241
$237,559,338
$267 925 437
$211,945,102
$178,174 797
$128 685,833
$131 834 707
$97,611,055
$7,948,128
$8 189 574
$7 362,766
$6 836 647
$7 377 809
$6,316,715
$7 996,848
$6 299 456
$6 825 576
$6 316 715 Page 39 of 42 Cumulative I Trust Account 1 Decommissioning j Funding Estimate 1
I
$7,445
$63 009
$308 836
$3 683 869
$14,038,432
$14,038,432 Actual
$22,819,815
$34,411,660
$47 683,707
$59 869 296
$77 741 034
$99 836 159
$258 351,466
$392 522 407
$547,180,128
$661,509,757
$800 619 296
$927 200 419
$1 123 034,660
$1,360,593,998
$1 628 519 435
$1,840,464,538
$1,708,513,862 Market Value
$2 018 639 335
$2 147 325 168
$2 279, 159 875
$2 376 770 930
$2 384,719,058
$2,392,908,632
$2 400,271,398
$2 407 1 08 045
$2 414 485 854
$2,420,802 569
$2,428,799 416
$2,435 098 872
$2 441 924,448
$2,448 241 162
- Year I
2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 r-Grand Total NRC Scope (Radiological) r
'\\
$1,578,362,475 NOTES:
Diablo Canyon Power Plant Site-Specific Decommissioning Cost Estimate Non-NRC I
Scope Spent Fuel Cumulative Total
! Decommissioning (Non-Management Estimate Radiological)
$33 534
$6 792 041
$6,825 576
$2 455 066, 738
$33 534
$7 475 964
$7 509 498
$2 462 576 236
$33 534
$6 792 041
-- $6 825,576
$2 469 401 812
$33,626
$6,283 088
$6 316 715
$2 475 718 526
$33,534
$6,792,041
$6,825,576
$2,482,544,102
$33,534
$6,265,921
$6,299,456
$2,488,843,558
$33 534
$7 840 756
$7 874 290 I
$2 496,717 848
$33 626
$6 283 088
$6 316 715
$2 503 034 563
$33,534
$6,914,598
$6,948,133
$2,509,982,696
$33,534
. $6,265,921
$6,299,456
$2 516,282,152
$33,534
$6,792,041
$6 825,576
$2 523 107,727
$227,658
$8,401,616
$8,629,274
$2,531,737,002
$629,487
$8,444,463
$9,073,951
$2,540 810,952
$452,453
$9120 892
$9 573 345
$2 550 384 298
$570 998
$9,894 461
$10,465,459
$2,560,849,756
$361 646
$8 291 863
$8 653 508
$2 569 503 265
$346,148
$10,180,840
$10,526,988
$2,580,030,253
$521,242
$10,466,177
$10,987,419
$2,591,017,671
$15 750,295
$43 223,193
$58 973 488
$2 649 991,159 I
$749 528
$28 394 987
$29 144,515
$2,679, 135 67 4
$4,40 723
$18 555 526
$18 996 250
$2 698 131 924
$332,567
$14,628,893
$14,961,460
$2,713,093,384
$&.533
$3,515,938
$3,522,470
$2,716,615,854
$2 651 183
$2,651, 183.
$2,719,267,038
$1,368,883
$1,368,883
$2,720,635,920
$1,368,883
$1,368,883
$2,722 004,803
$1473143
$1,473,143
$2 723 4 77 945
$42,479
$42;479
$2,723,520,425
$537,089,629
$608,068,321
$2,723,520,425
1
- 2. Trust Account Value of $1,90$.7 million.Market Value as of 06/30/19.
Page 40 of 42 Trust Account Funding
- 6. Conclusion Diablo Canyon Power Plant Site-Specific Decommissioning Cost Estimate The DCPP SSDCE complies with NRG requirements set forth in 10 CFR 50.82,
Termination of license," paragraphs (a)(4)(i), (a)(8)(iii), and 10 CFR 50.75(f)(3).
PG&E prepared this cost estimate and schedule using several sources, including the DCE included in the DCPP Decommissioning-Funding Report $Ubmitted to the NRC on March 26, 2019 (Reference 1, Enclosure 5) which utilized expertise from PG&E's full-$cale decommissioning at HBPP Unit 3, industry experts, and benchmarking.
The SSDCE is based on regulatory requirements, site conditions, baseline.
assumptions, low-level radioactive waste disposal standards, high-level radioactive waste management options, and site restoration requirements. The cost to decommission the DCPP site, safeguard the SNF and GTCC waste until it can be transferred to the DOE, and restore the affected area of the site is estimated to be
$5.144 billion (2019 dollars). The majority of this cost is associated with license termination. A significant amount of the remaining cost is associated with ~NF management since the fuel and GTCC waste wil_l be removed from the SFP and remain in storage at the ISFSI until possession is transferred to DOE. A relatively small amount of the decommissioning cost is for the demolition of uncontaminated structures and restoration of the site. The summary of the costs estimated for license termination, spent fuel management, and site restoration activities are presented in Table ES-1.
The largest contributors to the overall decommissioning costs are removal of contaminated components and buildings, disposal costs, and program management costs. Removal costs reflect the labor-intensive nature of the decommissioning process, as well as the management controls required to ensure a safe and successful program. The disposal of low-level radioactive waste that is generated from dismantling activities makes up the bulk of the disposal ~st category. The magnitude of the program mal)agement costs is a function of both the size o_f the1 organization needed to manage the decommissioning, as well as the duration.
In accordance with 10 CFR 50.82(a)(8)(v), decommissioning funding assurance will be reviewe,d and reported to the NRC annually until residual radioactivity has been reduced to a level that permits termination of the licenses. The SSDCE adjusted for inflation, in accordance with applicable regulatory requirements, will be used to demonstrate funding assurance. In addition, actual'radiological and spent fuel management expenses will be included in the annual report in accordance with applicable regulatory requ_irements.
If the funding assurance demonstration shows that the NOT is not sufficient, then an 1 alternate funding mechanis!J1 allowed by 10 CFR 50.75(e) and the guidance provided in Regulatory Guide 1.159 (Reference 10) will be put in place.
Page 41 of 42
Diablo Canyon Power Plant Site-Specific Decommissioning Cost Estimate I
- 7. References
- 1.
PG&E Letter DCL-19-020, "Decommissioning Funding Report for Diablo Canyon Power Plant, Units 1 and 2," dated March 26, 2019 (ADAMS Accession No. ML190948782).
- 2.
PG&E Letter DCL-18-096, "Certification of Pennanent Cessation of Power Operations," dated November 27, 2018 (ADAMS Accession No. ML18331A553).
- 3.
Regulatory Guide 1.202, "Standard Format and Content of Decommissioning Cost Estimates for Nuclear Power Plants," dated February 2005 (ADAMS
.Accession No. ML050230008).
- 4.
NUREG-1713, "Standard Review Plan for Decommissioning Cost Estimates for Nuclear Power Reactors," dated December 2004 (ADAMS Accession No. ML043510113).
r I
- 5.
NUREG-0586, Supplement 1, "Generic Environmental Impact Statement on Decommissioning of Nuclear Facilities," dated November 2002 (ADAMS Accession No. ML023470304 (Vol 1) and ML023470323 (Vol 2)). *
- 6.
EPRI Report No. 1011734, "Maine Yankee Decommissioning Experience Report (1997 - 2004)," 2005. Publicly accessible at: www.epri.com
- 7.
EPRI Report No. 1003025, "Decommissioning Pre-Planning Manual," 2001.
Publicly accessible at: www.epri.com
- 8.
NUREG-1575, "Multi-Agency Radiation Survey and Site Investigation Manual (MARSSIM)," Revision 1, dated August 2000 (ADAMS Accession No. ML003761445).
- 9.
NUREG-1757, "Consolidated Decommissioning Guidance Financial-Assurance, Recordk:eeping, and Timeliness," Vol. 3, Revision 1, dated February 2012 (ADAMS Accession No. ML12048A683).
- 10. Regulatory Guide 1.159, "Assuring the Availability of Funds for Decommissioning Nuclear Reactors," Revision 2, dated October 2011 (ADAMS Accession No. ML112160012).
11-. NRG Letter, "Diablo Canyon Nuclear Power Plant, Units 1 and 2 -.Exemptions from the Requirements of 10 CFR Part 50, Section~ 50.82(a)(8)(i)(A) and 50.82(a)(8)(ii) (EPID L-2018-LLE-0023)," dated September 10, 2019 (ADAMS Accession No. ML19163A104).
Page 42 of 42
Decommissioning Cost Estimate by Phase and Cost Category (in thousands)
Attachment A Site-Specific DCE A
B C
D 1
E F
G H
I J
K L
M 1-Pre Shutdown 2-Power Block i.Building ID Scope Description Total Estimate Pl M d*t*
t*
3-Wet Storage 01 mol*ti 5-S,te Restoration 6-ISFSI Operahons 7-ISFSI Reslorahon License Spent Fuel 1
11 1.1.ty H Contracfor anmng o 1 1ca ions e
I on Site Res oro on U 1,
ours Nominal/ 2019$
Termmolion Management Ho11.1rs 12/2010 - 10/2024 11/2024 - 4/2027 5/2027 - 6/2032 7/2032 - 4/2035 5/2035 - 12/2038 1/2039 - 8/2067 9/2067 - 1/2076 Unassigned Costs 1
Program Management, Oversight, and Fees 1,547,114 $
162,718 $
345,608 $
433,485 $
214,782 $
161,091 $
198,817 $
30,613 $
1,139,092 $
292,320 $
115,701 5,053,210 1,035,578 1.01 Staffing 770,002 $
118,699 $
132,914 $
279,951 $
106,398 $
75,713 $
48,053 $
8,274 $
610,907 $
87,464 $
71,631 5,033,370 46,617 1.02 Severance 165,856 $
121,205 $
22,549 $
13,865 $
6,648 $
1,589 $
157,619 $
8,237 $
1.03 Energy 71,554 $
7,372 $
35,478 $
8,505 $
9,462 $
10,737 $
60,592 $
10,763 $
200 1.04 Insurance 29,160 $
14,575 $
2,077 $
813 $
1,055 $
8,235 $
2,406 $
18,348 $
10,660 $
153 1.05 Property Tax 41,979 $
1,398 $
4,306 $
2,358 $
3,061 $
23,880 $
6,977 $
10,623 $
30,914 $
443 1.06 N RC Fees / Reviews 71,696 $
14,344 $
6,222 $
12,137 $
3,081 $
3,798 $
27,605 $
4,507 $
32,666 $
38,868 $
162 118,114 1.07 Association/Industry Fees 8,409 $
1,433 $
3,414 $
1,708 $
1,855 $
8,409 $
1.08 Facility Maintenance 22,917 $
6,280 $
7,700 $
3,465 $
2,419 $
2,919 $
135 $
19,270 $
3,483 $
164 174,477 1.09 Water Management 76,018 $
8,133 $
18,144 $
27,999 $
11,825 $
9,133 $
783 $
66,102 $
9,916 $
111,580 1.10 Permits 60,891 $
20,410 $
1,752 $
15,651 $
8,239 $
1,257 $
10,492 $
3,090 $
21,289 $
12,201 $
27,401 172,735 1.11 Future Land Use 13,149 $
7,690 $
4,921 $
538 $
13,149 101,837 1.12 Spent Fuel Management Plan 63,295 $
61 1,694 $
6,135 $
5,799 $
10,446 $
38,912 $
248 $
893 $
62,402 $
182,663 1.13 License Termination Plan 15,094 $
2,043 $
4,380 $
4,493 $
2,032 $
2,146 $
10,917 $
4,177 $
65,437 1.14 Site Characterization 15,811 $
15,795 $
16 $
15,811 $
57,805 1.15 Emergency Planning - Senate Bill 1090 46,423 $
756 $
21,636 $
11,519 $
12,511 $
46,423 $
1.16 Emergency Planning 28,792 $
15,922 $
9,157 $
1,214 $
2,498 $
27,612 $
1,180 19,840 1.17 Consumables 39,668 $
4,340 $
13,239 $
5,733 $
5,726 $
10,172 $
458 $
25,213 $
13,235 $
1,220 4,313 1.18 Public Outreach & Stakeholder Engagement 6,400 $
1,514 $
896 $
1,863 $
1,020 $
1,108 $
6,400 $
- I 2.01 Security Staffing 578,430 $
100,955 $
225,168 $
20,296 $
26,322 $
205,512 $
177 $
4,311 $
574,119 $
5,035,669 2.02 Other Security Related Costs 19,452 $
1,382 $
4,434 $
2,808 $
3,602 $
6,829 $
397 $
11,056 $
7,283 $
1,112 64,765 3.01 Waste & Transportation Management 133,020 $
3,598 $
16,391 $
40,710 $
59,640 $
1,486 $
11,195 s 63,921 s 12,126 $
56,973 1,042,349 3.02 Transportation 113,029 $
760 $
17,931 $
66,309 $
24,139 $
3,889 $
71,136 $
3,856 $
38,037 3.03 Disposal 666,560 $
s 571 $
13,476 $
543,348 $
103,011 $
6,154 $
654,341 $
6,154 $
6,064 3.04 Material Management 54,651 $
949 $
23,381 $
13,862 $
9,288 $
2,731 $
978 $
3,462 $
20,365 $
4,440 $
29,846 313,472 3.05 Asset Recovery (56,006) $
(7,835) $
{12,857) $
(27,290) $
(8,023) $
{9,343) $
(46,662) 3.06 GTCC Disposal 42,690 $
42,690 $
42,690 $
Discrete Costs 4
Power Block Modifications 85,116 20,759 63,852 385 $
1 120 S 85,116 $
482,193 4.01 Ul Spent Fuel Pool Island s
7,061 s 1,988 $
4,867 $
157 $
49 7,061 s s
41,714 4.02 U2 Spent Fuel Pool Island 6,426 $
1,097 $
5,029 $
228 $
72 $
6,426 $
37,633 4.03 Install 230kV Baywood Feed 18,299 $
4,849 $
13,449 $
18,299 $
106,701 4.04 Ul Cold and Dark 19,669 $
3,415 $
16,255 $
19,669 $
101,561 4.05 U2 Cold and Dark 19,669 $
3,415 $
16,255 $
s 19,669 $
101,561 4.06 Security Modifications 13,991 $
5,995 $
7,997 $
13,991 $
93,024 5
Site Infrastructure 148,417 $
7,441 $
46,961 $
84,766 $
S,625 $
2,349 S 1,171 103 $
147,143 $
1,274 $
839,339 5.01 Offsite Infrastructure 30,799 $
160 $
30,638 $
s s
30,799 $
133,448 5.02 Road Improvements s
17,353 $
11,884 $
2,221 $
948 $
1,028 $
1,169 $
103 $
16,080 $
1,272 $
88,996 5.03 Facility Construction 30,223 $
190 $
17,718 $
12,315 $
30,223 $
166,239 5.04 Existing Building and Structure Modifications 21,539 $
8,756 $
12,193 $
496 $
92 $
1 $
0 $
21,537 $
2 $
112,291 5.05 ISFSI Security Building Construction 14,875 $
2,736 $
12,139 $
14,875 $
77,090 5.06 ISFSI Pad Expansion for GTCC Storage 15,107 $
6,699 $
1,436 $
6,972 $
s s
15,107 s 102,342 5.07 Project Oversight and Support 18,522 s 552 $
4,272 $
8,287 $
4,181 $
1,229 $
18,522 $
158,934 6
Large Component Removal 182,004 $
44,716 $
137,288 S S
182,004 $
352,279 6.01 Legacy Steam Generators s
51,270 s 28,644 $
22,626 $
s 51,270 s 46,260 6.02 Legacy Rx Heads 3,979 $
312 $
3,667 $
3,979 $
10,096 6.03 Steam Generators s
85,475 s 9,668 $
75,807 s s
s 85,475 s 169,010 6.04 Reactor Heads 5,022 s s
238 $
4,784 s 5,022 $
4,921 6.05 Reactor Coolant Pumps 10,331 $
659 $
9,672 $
10,331 $
21,014 6.06 Pressurizers s
4,640 s 299 s 4,341 $
4,640 $
5,181 6.07 Manipulators 1,067 s 211 $
856 $
1,067 s 2,318 6.08 Generators and Exciters 625 s 625 $
625 $
3,654 Page 1 of 3
Decommissioning Cost Estimate by Phase and Cost Category (in thousands)
Attachment A Site-Specific DCE A
B C
D E
F G
H I
J K
L M
1-Pre Shutdown 2-Power Block 4-Building ID Scope Description Total Estimate Pl M dT r 3-Wel Storage Demolitio 5-Site Restoration 6-ISFSI Operations 7-ISFSI Restoration License Spent fuel Contractor No. a 9
anmng o I ica ions n
T ination ana e e Sile Restoration Utility Hours Hours 6.09 Main Turbines 1,725 s 1,725 $
1,725 $
10,420 6.10 Diesel Generators 763 $
763 763 $
3,086 6.11 Other Turbine Building Components 5,665 $
5,665 5,665 $
26,472 6.12 Large Access Penetrations 344 $
344 s 344 $
1,025 6.13 Project Oversight and Support 11,096 $
4,341 $
6,755 $
11,096 s s
48,821 7
Reactor/Internals Segmentation 363,271 $
1,396 $
186,359 175,517 S 363,271 $
532,765 7.01 Ul Internals Segmentation 18,226 $
18,226 $
s 18,226 s 74,760 7.02 Ul Reactor Segmentation s
10,691 $
4,864 $
5,827 $
s 10,691 $
40,810 7.03 U2 Internals Segmentation 17,998 $
15,420 $
2,578 $
s 17,998 $
63,490 7.04 U2 Reactor Segmentation s
8,790 $
8 $
8,782 $
s 8,790 s 33,850 7.05 Waste & Transportation s
214,825 $
67,372 $
147,453 $
s 214,825 $
3,430 7.06 Project Oversight and Support 38,458 $
1,396 $
27,739 $
9,324 $
s 38,458 s 182,551 7.07 Specialty Equipment 54,282 $
52,730 $
1,553 $
54,282 $
133,874 8
Spent Fuel Transfer to ISFSI 246,588 $
141 $
245,389 S 412 $
364 $
282 S 29,217 S 217,371 S 52,988 327,906 8.01 SNF and GTCC Cask Procurement 188,998 s 188,998 $
21,058 s 167,940 $
9,940 8.02 Ul Spent Fuel transfer to ISFSI 29,106 $
117 $
28,9S9 $
30 $
2,177 $
26,929 s 26,494 162,261 8.03 U2 Spent Fuel transfer to ISFSI 22,220 s 24 $
22,166 $
30 $
22,220 $
26,494 123,121 8.04 Ul GTCC Transfer to ISFSI 3,760 $
2,762 $
352 $
364 $
282 $
3,478 $
282 $
17,535 8.05 U2 GTCC Transfer to ISFSI 2,504 s 2,504 $
2,504 $
15,049 9
Turbine Bldg S
72,557 S
3,598 S 51,255 S 17,701 S 3 S S
S 72,557 S 406,964 9.01 Ul Decontamination 21,736 s s
2,691 s 18,146 $
900 $
s s
21,736 s 131,306 9.02 Ul System & Area Closure 7,090 s 154 $
6,255 $
681 $
7,090 $
35,348 9.03 Ul Demolition 5,914 $
1,072 $
4,841 s 1 $
s 5,914 $
s 27,661 9.04 U2 Decontamination 19,747 s s
479 s 14,147 s 5,121 $
s s
19,747 $
s 119,335 9.05 U2 System & Area Closure s
11,475 $
s 274 $
10,424 $
777 $
11,475 $
s 64,015 9.06 U2 Demolition 6,595 $
1,212 $
5,381 $
1 $
6,595 $
s 29,300 10 Aux Building S
97,219 S S
9,631 S 63,937 S 23,646 5 $
S S
97,219 S S
598,758 10.01 Ul Decontamination 3,150 $
s 1,213 $
519 $
1,417 s s
s 3,150 $
s 20,566 10.02 Ul System & Area Closure 35,944 $
3,744 $
30,937 $
1,263 $
35,944 $
240,451 10.03 Ul Demolition 11,773 $
2,161 $
9,610 $
3 $
11,773 $
50,901 10.04 U2 Decontamination 2,035 $
1,202 $
519 $
314 $
2,035 $
12,530 10.05 U2 System & Area Closure 32,708 $
3,472 $
27,658 $
1,578 $
32,708 217,713 10.06 U2 Demolition 11,609 $
2,143 9,464 $
2 $
11,609 $
56,597 11 Containment 127,656 S 38,101 S 52,420 S 37,126 S 9 S S
127,656 S S
739,321 11.01 Ul Decontamination 8,862 s 5,429 $
2,628 $
805 s s
s s
8,862 $
s 50,887 11.02 Ul System & Area Closure 35,332 $
19,211 s 15,092 $
1,029 $
35,332 $
231,803 11.03 Ul Demolition 20,232 $
s 3,691 $
16,537 $
4 $
s 20,232 s s
90,094 11.04 U2 Decontamination 6,909 s s
4,140 s 1,808 s 961 s
6,909 $
37,891 11.05 U2 System & Area Closure 35,840 $
s 9,320 $
25,437 $
1,082 s s
35,840 $
s 237,014 11.06 U2 Demolition 20,481 $
s 3,763 $
16,713 $
4 $
20,481 s 91,631 12 Fuel Handling Building 51,262 $
964 S 17,185 $
33,111 S 2 S S
S 51,262 S S
298,259 12.01 Ul Decontamination 2,127 $
s 230 $
1,897 $
s 2,127 s s
11,900 12.02 Ul System & Area Closure 15,731 $
419 s 11,817 s 3,495 s s
15,731 s s
102,621 12.03 Ul Demolition s
7,305 $
s 1,349 $
5,954 $
2 $
s s
7,305 $
25,448 12.04 U2 Decontamination s
2,063 $
s 230 $
1,833 $
s 2,063 s 11,475 12.05 U2 System & Area Closure 20,123 $
545 $
2,819 $
16,759 $
20,123 $
130,906 12.06 U2 Demolition 3,914 $
s s
740 $
3,173 $
1 $
3,914 $
15,909 14 Balance of Site S
85,021 4,385 21,527 27,205 S 26,9SS 4,948 S S
S 26,644 S S
SS,377 S02,627 14.01 14.02 14.03 Decontamination System & Area Closure Demolition 11,705 $
14,938 $
58,377 $
$ s 4,385 $
1,305 $
3,583 $
16,639 $
6,280 $
5,425 $
15,500 $
3,816 $
5,930 $
17,209 $
305 4,644 s
11,705 14,938 $
s
$ s 58,377 77,563 89,477 335,587 15 Intake Structure 43,664 4,481 34,823 4,338 22 6,851 36,813 174,459 15.01 15.02 15.03 System Area Closure Coffer Dam Demolition 6,851 $
14,974 $
21,839 $
4,481
$ s 2,059 $
14,974 $
17,790 $
311 $ s 4,028 $
22 $
s s s s s s 6,851 $
14,974 21,839 43,407 35,818 95,234 16 Discharge Structure S
15,867 $
S 505 lS,362 S 1 S 15,867 $
69,467 Page 2of 3
Decommissioning Cost Estimate by Phase and Cost Category (in thousands)
Attachment A Site-Specific DCE A
B C
D E
F G
H I
J K
L M
1-Pre Shutdown 2-Power Block 4-Building ID Scope Description Total Estimate Pl M dT r 3-Wet Storage Demolition 5-Site Restoration 6-ISFSI Operations 7-ISFSI Restoration License Spent Fuel ITt Contractor Nominal 2019 anmng o 1 1ca ions erminatio Mana Site Restoration U 11 y Hours 16.01 16.02 16.03 16.04 Discharge Piping Decon Coffer Dam Demolition System Area Closure 602 $
7,589 $
2,828 $
4,848 $
s s
$ s s s
$ s 505 602 $
7,589 2,323 4,848 s s 1 $ s s s s s 602 7,589 $
2,828 $
4,848 $
s
$ s s 3,710 24,492 11,852 29,412 17 Breakwater 299,821 $
1,092 $
298,729 $
299,821 131,304 17.01 17.02 17.03 Demolition Transportation Disposal Cost 144,210 $
134,931 $
20,680 $
1,092 $ s s 143,118 $
134,931 $
20,680 $
s s s s s s s
144,210 134,931 20,680 131,304 18 Non-lSFSI Site Restoration 142,232 S 5,681 $
11,186 $
22,858 $
83,194 $
14,308 $
5,005 142,232 650,452 18.01 18.02 18.03 18.04 Utilities and Structures Demo Soil Remediation Final Site Survey Grading and Landscaping 33,059 $
4,368 $
42,682 $
62,123 $
3,359 $
2,322 $
4,908 $
6,278 $
1,419 $
1,477 $
3,977 $
15,985 $
12,460 $
2,757 $
33,797 $
34,181 $
10,817 $
134 $
3,357 $
5,005 $
s 33,059 4,368 42,682 62,123 85,543 21,781 247,056 296,072 19 Spent Fuel Transfer to DOE 26,382 S 3
429 $
992 $
21,262 $
3,697 $
26,382 $
117,160 19.01 19.02 19.03 Ul Spent Fuel Transfer to DOE U2 Spent Fuel Transfer to DOE GTCC Transfer to Offsite Facility 7,296 $
18,034 $
1,052 $
s 3 $ s s
429 $
526 $
466 $
6,770 $
13,440 $
1,052 $
s 3,697 $
s s 7,296 $
18,034 $
1,052 $
51,795 57,895 7,470 20 ISFSI Demolition and Site Restoration 57,850 $
S 5,191 S 52,659 $
57,850 $
287,967 20.01 20.02 20.03 20.04 Utilities and Structures Demo Soil Remediation Final Site Survey Grading and Landscaping 24,962 $
2,165 $
2,027 $
28,696 $
s
$ s s s
s 2,663 $
2,529 $
22,300 $
2,165 $
2,027 $
26,167 $
24,962 $
2,165 $
2,027 $
28,696 $
133,651 12,324 9,040 132,951 GRAND TOTAL 5,143,867 197,648 708,071 1,624,597 $
1,234,544 $
763,129 498,526 117,351
'3,159,685 1,245,867 738,315 10,141,866 8,967,383 Note: 2010-2018 in Nominal Dollars. 2019-2076 in 2019 dollars.
Page 3 of 3