ML13046A297

Decommissioning Study of the Maine Yankee Independent Spent Fuel Storage Installation.

ML13046A297
Person / Time
Site:	Maine Yankee
Issue date:	12/31/2012
From:	Knight Cost Engineering Services
To:	Office of Nuclear Material Safety and Safeguards
Shared Package
ML130460347	List: ML13045A487 ML13046A297
References
Download: ML13046A297 (21)

Text

Decommissioning Study of the Maine Yankee Independent Spent Fuel Storage Instaflation Prepared for Maine Yankee Atomic Power Company Knight Cost Engineering Servlces, LLC December, 2012

Knight Cost Engineering Services, LLC KCES 2012-800, Rev. 1 TABLE OY CONTENTS

1.0 INTRODUCTION

............................................................................................ 3 2.0 SUMMLARY ..................................................................................... 4 3.0 DECOMMISSIONING COST ESTIMATING METHODtOLOGIES ................ 7 4.0 ASSUMPTIONS .............................................................................. 8 5.0 SCHEDULES ............................................................................. 10 6.0 PROJECT MANAGEMENT .......................................... ................. 12 6.1 UTILITY STAFF ....................................................................................... 12 6.2 DECOMMISSIONING GENERAL CONTRACTOR ........................................... 12 6.3 SECURITY .............................................................................. 13

7.0 REFERENCES

............................................................................. 14 APPENDIX A .................................................................................... 15 Page 2 of 15

Knight Cost Engineering Services, LLC KCES 2012-800, Rev. 1 1.0 INTRr JCTION The purpose of this study is to identify the costs a ,sociatc J with the decommissioning of the Maine Yankee (MY) Independent Spent Fuel Storage Installation (ISFSI). This estimate iricludes only the structures, systems and land within the NRC licensed area. The MY ISFSI is located within the site boundary of the former Mamie Yankee nuclear power plant in the Town of Wiscasset, Maine. The site is approximately 1200 feet north of the former plant site in an area used as a vehicle parking lot. The NAC-UMS fuel storage and transport canister system chosen by MY is licensed by the NRC for both storage and transportation.

The ISFSI consists of the storage system and concrete storage pads, a Protected Area (PA) for spent fuel storage and a Security/Operations Building for equipment and staff The PA contains 16 3 foot thick concrete pads, each 31 feet by 31 feet. There are 64 dry storage casks on the 16 pads, 60 for spent fuel and four for sections of the reactor vessel internals that are classified as Greater Than Class C (GTCC) waste. Each vertical concrete cask has a two and a half-inch steel liner surrounded by 28.3 inches of reinforced concrete.

Page 3 of 15

Knight Cost Engineering Services, LLC KCES 201,2-800, Rev. 1 2.0 'U5 U MA1AY Decommissioning is the safe removal of a facility or site - ,m service and the reduction of radioactivity to a level that permits either the rel.ease of the ýroperty for unr,estricted use and NRC license termination; or a restricted release cf &.., properiy and NRC license termination.

This estimate includes all costs incurred to release the property for unrestricted use.

On June 17, 2011, the NRC published a ffnal rule amending its regulations to improve decommissioning planning. The rule will become effective on December 17, 2012 and requires compliance by March 31, 2013. This rule will require licensees to report additional deteiis in their decommissioning cost estimate. To assist in the implementation of the new rule, the NRC issued NUREG-1757, "Consolidated Decommissioning Guidance, Financial Assurance, Recordkeeping and Timeliness."

NUREG-1757 does not apply to licensees under 10CFR Part 50 nor does it eliminate the need to follow Regulatory Guide 1.202 or NUREG-1713. It does provide additional information to support the development of the cost estimate. This cost estimate was prepared in accordance with the guidelines provided in RG 1.202 and NUREG-1713. In addition, it does take into account the guidelines identified in NUREG-1757.

NUREG-1757 specifies that a contingency of 25% is to be included in the estimate. This estimate takes exception to this contingency level for two reasons. First, the estimate is conservative in that the entire storage pad, concrete overpacks and overpack liners are assumed to be disposed of as potentially contaminated. Second, the MY site has recently been successfully decommissioned. Many of the key personnel involved in that project remain at the MY ISFSI. The lessons learned from that project will be incorporated in the MY ISFSI decomnissioning. For this reason it is felt that a 10% contingency is adequate to cover unknown and unplanned occurrences.

The total cost including contingency is $26.8 million, 22.1 million for radiological removal and

$4.7 million for non-radiological removal. Table 2-1 provides a summary of costs. Cost details are provided in Appendix A TABLE 2-1

SUMMARY

OF COSTS Non-Radiologi.zal radiological Total Cost Removal $ Removal $

Grand Total Building $26,753,057 S22,168,343 $4,652,713 Tax on General Contractor $0 so) $0 General Contractor with contingency $18,006,215 $L4,940,7J1 $3,145,434 Page 4 of 15

Knight Cost Engineering Services, LLC KCES 2012-800, Rev. I Site Costs with contingency $8,66,841 $7,159,562 $1,507,279 General Contractor $16,442,014 $13,582,528 $2,859,485 Site Costs $7,878,947 $6,508,693 $1,370,254 MY ISFSI $23,320,961 $20,091,221 $4,229,739 PERIOD DEPENDENT COSTS $14,247,714 $11,769,847 $2,477,867 1.1 MY Site Costs $7,878,947 $6,508,693 $1,370,254 1.1.1 Project Management $3,230,547 1.1.2 Security Staff $2,153,899 1.1.3 Fees $687,000 $567,522 $119,478 1.1.4 Insurance $604,500 $499,369 $105,131 1.1.5 Legal $200,000 $165,217 $34,783 1.1.6 Property Taxes $1,003,000 $828,565 $174,435 1.2 General Contractor $6,368,768 $5,261,154 $1,107,614 1.2.1 Decommissioning General Contractor $3,335,095 1.2.2 Waste Packaging Crew $1,051,503 1.2.3 Equipment & Materials $1,982,170 ACTIVITIES $10,073,246 $8,321,374 $1,751,872 1.3 Project Engineering $18,639 $15,397 $3,242 1.3.1 Procedure Development and Review - Offsite $9,319 Preparation of QA and Safety Documents - Offsite (in 1.3.2 parallel with 1.2.1) $9,319 Site Mobilization and General Employee Training 1.4 (GET) $89,816 $74,196 $15,620 1.4.1 Site Mobilization $21,580 1.4.2 General Employee Training $62,375 1.4.3 Site Specific Training $5,860 1.5 Site Preparation - Performed by Staff $10,916 $9,017 $1,898 1.5.1 Initial Site Survey 1.5.2 Setup work areas 1.5.3 Decontamination Readiness Review 1.6 Disconnect all utilities to work areas. $5,458 $4,509 $949 1.6.1 Electrical $2,729 1.6.2 Ventilation $1,364 1.6.3 Piping $1,364 1.7 Removal inside fences $8,684,403 $8,176,919 $507,484 1.7.1 Remove compacted gravel $370A09 $370,409 1.7.2 Remove VCCs $5,875,944 $5,875,944 $0 1.7.2.1 Exterior Concrete $3,990,592 SO $0 1.7.2.2 Steel liner $1,885,352 1.7.3 Remove Concrete Pad $2,300,975 $2,300,975 1.7.4 Remove Security Fence $61,131 $61,131 1.7.5 Remove Light Towers $75,945 $75,945 1.8 Removal outside fences S1.205.254 $1,205,264 1.8.1 Security/Operations Building $549,008 $549,008 Page 5 of 15

Knight Cost Engineering Services, LLC KCES 2012-800, Rev. 1 1.8.2 Remove paved area inside nuisance fence $84,637 $84,637 1.8.3 lkmove nuisance fence $67,391 $67,391 1.8.4 Miscellaneous Pads $76,849 $76,849 1.8.5 Miscellaneous structures $126,572 $126,572 1.8.6 Remove buried utilities $139,868 $139,868 1.8.7 SOB electrical service $8,021 $8,021 1.8.8 Remove road inside licensed area $137,895 $137,895 1.8.9 Remove vehicle barriers $15,022 $15,022 1.9 Final Site Survey Structure gone - By DGC Staff $25,000 $20,652 $4,348 1.9.1 Prepare Final Status Survey Plan 1.9.2 Soil Sampling 1.9.3 Direct Survey 1.9.4 Sampling Analysis 1.9.5 Prepare Final Status Survey Report 1.10 Orise Site Release Confirmation 1.11 Outside areas $8,712 $8,712 1.11.1 Backfill, grade and seed $8,712 $8,712 1.12 Demolition Crew Demobilization $15,720 $12,986 $2,734 1.13 Final Project Report - Offsite $9,319 $7,699 $1,621 Page 6 of 15

Knight Cost Engineering Services, LLC KCES 2012-800, Rev. 1 3.@ DECOMMISSIONING COST ESTIMATING APPROACH Two types cf costs were determined in this estimate: activity costs and level of effort costs. The activity costs were developed utilizing a unit cost factor approach. Site material quantities for concrete, steel and equipment where developed from :ite specific drawings. Productivity factors were app!led to these quantities to determine activity durations. Labor crews were developed and applied to the material quantities to determiine labor costs and person-hours. The activity durations were used to develop a project schedule.

The level of effort costs such as equipment rental and the General Contractor (GC) staff were developed based on the project schedule duration. A rental equipment file was developed for the construction effort. The GC staff is assumed to be on-site for the duration of the project. The Oversight staff cost is another level of effort cost that is included in the cost estimate.

Bulk removal of the storage pad and concrete storage casks is assumed to be performed using an excavator with a hydraulic hammer attachment. The steel liner will be segmented utilizing torch cutters. All of this waste will be trucked off-site for processing. This leads to a large disposal volume; however, at a lower rate for bulk processing than for direct burial. In addition, there will be far less characterization and iterative decontamination. Clean structuros will be demolished using mechanical means and disposed of at a local landfill.

In addition to the removal labor there is a dedicated waste packaging crew included in this estimate. This crew will consolidate, package and prepare containers for transportation. The waste packaging is estimated to remain on site for the duration of the project. This crew consists of 2 laborers; 1 Health Physics Technician; I Equipment Operator and 1 Foreman.

Page 7 of 15

Knight Cost Engineering Services, LLC IXCES 2012-800, Rev. 1 4.0 ASSUMPT7IONS Following is a list of assumptions developed by KCES in completing this study. These assumptions are based on the most current decommissioning methodologies and site-specific considerations.

1. Component quantities were developed from actual plant listings.

2. Concrete volumes were developed from plant drawings.

3. The oversight staff is assumed to be the stimilar size and configuration as it is currently.

4. The oversight staff positions and costs were supplied by the Company and represent July, 2012 salary and benefit data.

5. Subcontractor base labor rates and fringe benefits were taken directly from the 2012 R. S. Means Heavy Construction Cost Data and adjusted to Maine based on the City Cost Indexes for Augusta, ME.

6. Activity labor costs do not include any aCowance for delays between activities, nor is there any cost allowance for craft labor retained on-site while waiting for work to become available.

7. All skilled laborers will be supplied locally and hired by the Decommissioning General Contractor (DGC).

8. The cost for Utility personnel assisting the DGC to develop decommissioning activity specifications is included in the Utility Staff costs.

9. The separate DGC staff salaries, including overhead and profit, were determined by KCES.

10. Transportation costs are based on actual mileage from MY to Memphis, TN processing facility utilized in the estimate.

11. The ISFSI Concrete Pad, VCC exterior concrete and VCC liner steel are assumed to be Class A waste. This waste will be disposed of at the Studsvik processing ficility in Tennessee. A disposal rate of $0.13 per pound has been used in this estimate and is based on information provided by Studsvik.

12. The following buildings are disposed of as Clean waste in local landfill. A disposal rate of $91.80 per ton has been used in this estimate and is based on information provided in the 2012 R. S. Means Building Construction Cost Data.

Compacted gravel around pads Security Fence Page 8 of 15

Knight Cost Engliteering Services, LLC KCES 2012-800, Rev. I Li ,it Towers Seuriiy/Operations Building Paved area inside nuisance fence Nuisance fence Miscellaneous Pads Miscellaneous structures Buried utilities SOB electrical service Road inside licensed area Vehicle barriers

13. All costs used in these calculations were c*,,rent on July, 2012.

14. The costs of all required safety analysea and safety measures for the protection of the general public, the environment, and decommissioning workers are included in the cost estimates.

15. It is assumed that all UMS canisters containing both spent fuel nn1 GTCC will have been removed from site prior to the start of decommissioning.

16. Property taxes are included in the estimate at the current cost of $1,003,100 per year.

17. Fees are included in the estimate at the current cost of $687,000 per year.

18. Insurance costs are included in the estimate at the current cost of $604,500 per year.

19. Legal costs are included in the estimate at the current cost of $200,000 per year.

20. The decommissioning will be performed under the current regulations.

21. Removal of the pad and concrete overpacks will be performed in Tyvek coveralls.

Productivity rates have been adjusted to account for this.

22. The removal of the berm is not included in the estimate.

23. No subsurface material is assumed to require remediation regarding radionuclides. This assumption is justified because: 1) the ISFSI area was confirmed to be clean of radiological contaminants prior to the construction of the ISFSI; 2) the ISFSI eaea will be maintained clean of loose radiological contaminants during the storage period; 3) the irradiated fuel and GTCC waste are stored in sealed canisters; 4) nuclear activation of the VCCs, VCCs liners, and ISFSI pad are anticipated; the activation products will remain fixed during the storage period; and 5) if contamination of subsurface material occurs during decommissioning activities, the contamination is expected to remain below the decommissioning criteria of 25 millirem per year Total Effective Dose Equivalent Page 9 of 15

Knight CL"3Z Er,,- -1ing Services, LLC KCES 2012-800, Rev. I 5.0 VThIEDULE A scenario-specific schedule has been developerm,.L7r estimate.

Activity dur-< ons were determined based t:e unit co:ft faftxr approach. PiAant material L

inventory quaatities were developed from site specific material. Unit rates for cost, man hours asd schedule hours were applied to the material quantities. From this calculation the removal or decontamination cost, totA man hours and total schedule hours were determined for an activity.

The schedule hours are then entered into the schedule to determine project duration. Two work crews are assumed for the concrete pad and concrete overpacks. All other work was assumed to be performed by one crew. Work outside of the security fence will be performed in parallel with the work inside the fence. The total project duration is 17.97 months.

Figure 5-1 provides the detailed decommissioring schedule.

Page 10 of 15

Knight Cost Engineering Services, LLC KCES 2012-800, Rev. 1 Figure 5-1 Project Schedule 00Iilm . W %l a' ~amb.- VM 14M14 Sb~s TiM14/IS 4 1pimewes, ofQka ma DOOsluab-Ca0

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Knight Cos- Engineering Services, LLC KCES 2012-800, Rev. 1 6.0 PROJECT IWANIAGEMENT There are three components to project management during decommissioning, Oversight Staff (staff), &' -ormnissioning General Contractor Staff (DGC) and Security. The person levels for each are :-ftified

.- below.

6.1 OVE-kSIGHT STAFF The staff size is currently at a level of 19 and is assumed to be maintained az this level and at a similar configuration during the d&commissioni ng. In addtion, one final status survey resource will be added and one licensing person will be &ddAd to issist in the decommissioniag. The staff will provide DGC oversight as well as mairAtaLi license compliance. Table 7-1 provides a summary of this staff.

TABLE #i-1 OVEREIGuif STAFF Staff Number Chief Nuclear Officer 1 Cask Relicensing Project Manager 1 Workers Concerns Manager 1 Business Manager 1 ISFSI Manager 2 ISFSI QA Manager 1 Regulatory Affairs I Public/Government Affairs I General Counsel 1 Business Administrator I Treasurer 1 Accountant 1 Benefits Manager 1 IT Services I ISFSI Operations Specialist 2 Program Manager 1 ISFSI Administrator I Licensing Engineer I Security Manager 1 21 6.2 DECOMMISSIONING GENERAL CONTRACTOR The DGC will be responsible for all of the physical work. The staff will oversee the work crews.,

schedule work and supply HP support. The DGC will be responsible for finishing the project on time and on budget. Table 7-2 provides a summary of the DGC staff.

Page 12 of 15

Knight Cost EngincIering Services, LLC KCES 2012-800, Rev. 1 TABLE 6-2 DGC STAFF 2012 Person Base Position Si-arv Levet Project Superintendent $148,000 1.00 CA Auditorllnspector $70,000 1.00 Health & Safety Supervisor $117,000 1.00 Packaging/Shipping Specialist $70,000 1.00 Cost Control Accountant $55,000 1.00 Scheduler II $60,000 1.00 Demolition Specialist M8S,000 1.00 Industrial SafeWy $86,000 1.00 Engineering Supervisor $117,000 1.00 Project Supervisor $79,000 1.00 Decontamination Tech $55,000 2.00 Instrumentation Tech $55,000 1.00 Tool Crib Attendant $43,000 1.00 14.00 6.3 SECURITY Once spent fuel has been removed from the site the security force will be significantly reduced.

This estimate assumes a force of 13 guards and one manager. This will allow a security person level of 5 guards during work time and two guzzds all other times. The guard force was assumed to consist of various levels of guards and the rate used has been adjusted accordingly.

Page 13 of 15

Knight Cos Engineering Services, LLC KCES 201:2-800, Rev. 1 7.0 References

1. R.S. Means, Inc, Building ConstructionCost Data,Kingston, Massachuf!,etts, 2012.

2. Regulatory Guide 1.202, "Standard Format and Content of Decommissioning Cost Estimates for Nuclear Power Reactors"

3. NUREG-1713, "Standard Review Plan for Decommissioning Cost Estimates fbr Nuclear Power Reactors"

4. NUREG-1757, "Consolidated Decommissioning Guidance, Financial Assurance, Recordkeeping and Timeliness" Page 14 of 15

Knight Cos' Engineering Services, LLC KCES 2012-900, Rev. 1 APPENDIX A Page 15 of 15

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