ARIES Project Meeting, L. M. Waganer, 3-4 April 2007 Page 1 Systems Code Cost Algorithm Status and Planned Enhancements L. Waganer/ L. El-Guebaly 3-4 April.

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ARIES Project Meeting, L. M. Waganer, 3-4 April 2007 Page 1 Systems Code Cost Algorithm Status and Planned Enhancements L. Waganer/ L. El-Guebaly 3-4 April 2007 UCSD Project Meeting

ARIES Project Meeting, L. M. Waganer, 3-4 April 2007 Page 2 Cost Of Electricity Is the Dominant Metric for Electrical Power Plants Necessary Criteria It must be credible (solid basis) It must be reasonably accurate (sufficient data fidelity) It must be reasonably detailed (somewhat bottoms up) Impediments Uncertainties exist on all current COE factors Future state estimate are even more uncertain Energy and environmental policies are evolving Financial arrangements are unclear and yet to be determined Approach Comply with DOE direction* on costing format and general content Base estimates on projected performance and economic factors Benchmark with prior studies and competitive technologies * PNL-2987 Fusion Reactor Design Studies – Standard Unit Costs and Cost Scaling Rules

ARIES Project Meeting, L. M. Waganer, 3-4 April 2007 Page 3 US Electricity Production Costs Previous Slide

ARIES Project Meeting, L. M. Waganer, 3-4 April 2007 Page 4 Insight into Electrical Generating Costs The Nuclear Energy Agency (NEA), an agency within the Organization for Economic Cooperation and Development (OECD), and the International Energy Agency (IEA) recently published a 2005 update to their “Projected Costs of Generating Electricity” series.Nuclear Energy AgencyOrganization for Economic Cooperation and DevelopmentInternational Energy AgencyProjected Costs of Generating Electricity The NEA/IEA study uses the levelized lifetime cost approach to compare generating costs for the future. This approach looks at generation costs over the plant economic lifetime, while taking into account the time value of money;. Levelized costs are comprised of all components of capital, Operations and Maintainence (O&M) and fuel costs that would influence a utility’s choice of generation options, including construction, refurbishment and decommissioning, where applicablelevelized lifetime cost The study finds that at a 5% discount rate, levelized costs for nuclear range between $21 and $31 per MWh (2.1 to 3.1 cents per KWh), with investment costs representing 50% of total cost on average, while O&M and fuel represent around 30% and 20%, respectively. For gas-fired plants, the study finds levelized costs ranging from $37 to $60 per MWh (3.7 to 6 cents per KWh), with investment costs accounting for less than 15% of total costs, O&M accounting for less than 10%, and fuel costs accounting for nearly 80% of total costs, on average. The study finds levelized costs for coal-fired plants ranging between $25 and $50 per MWh (2.5 to 5 cents per KWh). Investment costs for coal plants account for just over a third of total costs, while O&M and fuel account for around 20% and 45%, respectively. If you are wondering why oil is not mentioned oil is more expensive and is rarely used in electric power plants anymore. Nuclear power is more sensitive to interest rate levels. But a nuclear builder can try to time financing for construction of a nuclear plant to periods when long term interest rates are low. Whereas a builder of coal or natural gas plants will have to live with fluctuations in fuel prices over the life of the plant. Nuclear plant construction could be made much more responsive to long term interest rates by shrinking time spent in the regulatory approval and construction stages. Uranium fuel costs also fluctuate considerably but count for a much smaller percentage of total costs of a nuclear plant.

ARIES Project Meeting, L. M. Waganer, 3-4 April 2007 Page 5 Info from DOE Energy Information Administration New Nuclear Capacity is assumed to have 20% lower capital and operating costs in 2030 than in (current) reference case

ARIES Project Meeting, L. M. Waganer, 3-4 April 2007 Page 6 Least Expensive Technology Options Are Likely Choices for New Capacity, ref DOE EIA Conventional Nuclear is close to Coal and Gas, and surprisingly, Wind is reasonably competitive When lower cost case economics are applied to Conventional Nuclear, it is very competitive with Coal and Gas

ARIES Project Meeting, L. M. Waganer, 3-4 April 2007 Page 7 Relevant COE Metric Factors Cost of Electricity = (Gross Electric x Effcy – Recir Power) x Avail (D + ID Capital Cost) x FCR + Fuel + O&M Direct capital costs are usually estimated at subsystem level in power core and at systems levels for remainder of plant Direct capital costs are based on performance factors or cost / unit mass Indirect cost factors (Construction Services & Equipment, Engineering & Services, Owners Cost, Interest, and Escalation) have been prescribed for construction periods and interest/escalation rates, but need to be re-evaluated Fixed charge rate (FCR) is 9.65% but needs to be re-evaluated Tritium is processed on site, but there is some charges for this processing. Deuterium is a small cost element. Replacement power core components are considered as consumables in this account. Operational costs are predicted to be reduced in the future due to increased automation. Maintenance is more automated, but component parts are subject to inflationary influence. Acct Detail

ARIES Project Meeting, L. M. Waganer, 3-4 April 2007 Page 8 Relevant COE Metric Factors (Cont’d) Cost of Electricity = (Gross Electric x Effcy – Recir Power) x Avail (D + ID Capital Cost) x FCR + Fuel + O&M Gross Electricity is the combination of all thermal energy production elements in power core (plasma performance, energy and particle capture, and energy multiplication) Efficiency is the gross thermal to electrical energy conversion that considers Blanket materials, heat transport fluids, high temperature operation, HX materials, and energy conversion cycles Recirculating power is all the electrical power necessary for the plant operation (pumping, plasma heating, magnets, cryogenics, tritium handling, lights, etc). Availability is the percentage of time the plant is available for energy production All remaining plant functions must be modeled and their costs estimated to determine their contributions toward power production and capital costs

ARIES Project Meeting, L. M. Waganer, 3-4 April 2007 Page 9 Example Indirect Cost Factors ARIES-AT Tabular Factors data differs from Cost summary data Prometheus (and Osiris/SIRIUS) and ARIES Economic bases were revised based on DOE oversight committee in 1980.

ARIES Project Meeting, L. M. Waganer, 3-4 April 2007 Page 10 Fusion Studies Have Traditionally Used 5% Inflation Rates However, since 1983, the inflation rate is consistently below 5% and more like 3% or below

ARIES Project Meeting, L. M. Waganer, 3-4 April 2007 Page 11 Costing Basis and Approach Reassess current ARIES Systems Code algorithms for correctness and accuracy Research other fusion studies, guideline documents, and current competitive sources Re-evaluate basic study economic groundrules and assumptions for validity in projected environment Recommend performance based or cost/ unit mass algorithms to estimate at subsystem level in power core and systems in other areas – Subject matter experts should compile relevant cost data on subsystems Provide alternate technical solutions for trade studies Document all costing algorithms and bases for estimates

ARIES Project Meeting, L. M. Waganer, 3-4 April 2007 Page 12 Background Info ARIES-AT ECONOMIC BASIS Costing reference year 1992 Construction lead time (y) 6.00 Escalation/general-inflation rate (%/y) [nominal] Escalation/general-inflation rate (%/y) [constant] Ave. cost of money (AFUDC), xCOM (%/y) [nominal] Ave. cost of money (AFUDC), xCOM (%/y) [constant] Capitalization factor, fcap [nominal] Capitalization factor, fcapo [constant] Interest during construction, fIDC [nominal] Interest during construction, fIDC [constant] Dollar discount rate, dis [nominal] Dollar discount rate, diso [constant] Fixed charge rate, FCR [nominal] Fixed charge rate, FCR [constant] FW/B neutron end-of-life fluence (MW yr/m^2) R/M neutron fluence protection/extension factor

ARIES Project Meeting, L. M. Waganer, 3-4 April 2007 Page 13 Background Info UCSD/LANL fusion reactor economic evaluation (ver. 16.1) LSA=1 12/11/00 0 Acc. # Account Title M$ (1992) 20. land & land rights structures & site facilities reactor plant equipment FW/blanket/reflector shield magnets supplemental-heating/CD systems primary structure & support reactor vacuum systems (unless integral elsewhere) power supply, switching & energy storage impurity control direct energy conversion system ecrh breakdown system reactor equipment main heat transfer & transport systems turbine plant equipment electric plant equipment miscellaneous plant equipment heat rejection system special materials direct cost (not including contingency)

ARIES Project Meeting, L. M. Waganer, 3-4 April 2007 Page 14 Background Info UCSD/LANL fusion reactor economic evaluation (ver. 16.1) LSA=1 12/11/00 0 Acc. # Account Title M$ (1992) 90. direct cost (not including contingency) (from prior page of direct costs) 91. construction services & equipment home office engineering & services field office engineering & services owner's cost project contingency interest during construction (IDC) total cost Return