Progress on Systems Code J. F. Lyon, ORNL ARIES Meeting Nov. 4, 2004.

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Presentation transcript:

Progress on Systems Code J. F. Lyon, ORNL ARIES Meeting Nov. 4, 2004

Systems Optimization Code Minimizes core cost or size or CoE with constraints for a given plasma and coil geometry using a nonlinear constrained optimizer Iterates on a number of optimization variables – plasma:,, conf. multiplier; coils: width/depth of coils – reactor variables: B 0, Large number of constraints allowed (=, ) – P electric, ignition margin,  limit, confinement multiplier, radial build, coil j and B max, plasma-coil distance, clearance between coils, blanket/shield thicknesses, TBR, coil-coil access Large number of fixed parameters for plasma and coil configuration, plasma profiles, transport model, cost component algorithms, and engineering parameters

MHHOPT Reactor Optimization Code input: physics, coil, costing, geometry, reactor component parameters and constraints plasma/profile solver T e (r), T i (r), n e (r), n i (r), n Z (r), E r (r), , Z eff, P rad, P fusion, P ,loss, P wall, P divertor,  E, etc. masses of coil and structure, j, B max bl/sh volumes, TBR, access, radial build forces on coil and structure costs of all ARIES accounts, P electric evaluate all parameters & constraints output: all parameters and profiles nonlinear optimizer optimizes targets with constraints existing parts being updated will update no plans to use

Geometry Only looked at port maintenance approach – small non-angular-dependent gap between blankets, shields, vacuum vessel (like at 60-deg cross section) 30-deg 60-deg 0-deg

Systems Code Output Plasma parameters and profiles –,, W plasma,  E, H factors,,  *, n Fe / n e, n O / n e, Z eff –, T i0,, n i0, n e0, / n Sudo, n DT / n e – ignition margin, P fusion, P electric, P neutron, P charged, P divertor, components of P rad, P wall, P loss Coil parameters – modular & VF coil dimensions, currents, j, B max Reactor parameters – blanket and shield thicknesses, gaps, access between coils All ARIES cost accounts in 2004$ – includes total direct cost, total capital cost, cost of electricity All component masses & mass utilization

Approach and Assumptions 2004 costs for blanket/shield/vacuum vessel from Les and for coils from Leslie Inflation factor from 1980 for other costs Geometry factors for blankets, shields, vacuum vessel and coils from Long-Poe Five blanket/shield models from Laila – two blanket/shield areas (with fraction), no transition area yet – limit and shield thickness the same for all blanket/ shield cases so far Checking costing algorithms against ARIES-AT, ARIES-RS and SPPS results – currently only valid for LSA = 2 and 1 Compared results against 1-D POPCON calculations

NCSX-1, = 8.56 = 4.53, H = Systems POPCON P  MW %He Good Agreement Between Codes

Systems Code Status/Caveats Costing algorithms – some ~20% disagreements in comparing with previous ARIES cases but doesn’t affect relative comparisons or trends – coil case thicknesses not calculated from forces yet – a few (small) cost accounts not finished yet Optimization logic bug – minimizing capital cost uses COE instead – minimizing leads to strange results Comparison with POPCON code results – same plasma parameters obtained for the operating point Currently in adding features and debug cycle  Values (,, Cost of Electricity, etc.) are not correct, but relative values should be correct

Different Blanket/Shield Cases NCSX-1, LSA = 2, LiPb/FS/He H 2 O-cooled int. vacuum vessel Optimization: = 8.56 m, = 3.0 MW/m 2, B max = 16 T Small difference in CoE for internal vacuum cases, somewhat larger range 73.8–83.5 for external vacuum vessel cases

Values for Different Configurations LSA = 2, LiPb/FS/He H 2 O-cooled int. vacuum vessel Large range in CoE: 71.7–89.0

Typical Code Summary MHHOPTNEW code KU81 LiPb/FS/He H2O-cooled int. vacuum vessel inflation factor safety assurance flag 2 following CONSTRAINTS were selected: ignition margin 1.00 volume averaged beta 0.06 radial build magnetic field at coil ave. neutron wall load 3.00 maximum density Electric Power (GW) 1.00 Confinement multiplier 6.00 VARIABLES selected for iteration major radius field on axis ion density ion temperature coil width confinement multiplier FIGURE OF MERIT Cost of Electricity FINAL VALUES OF CONSTRAINTS: ignition margin volume averaged beta (%) 6.00 radial build margin 0.85 magnetic field at coil (T) ave. neutron wall load (MW/m2) 3.00 maximum density (10**20 m-3) 2.85 Electric Power (GW) 1.00 ratio of tauE to conf. multiplier 1.89 FINAL DESIGN major radius (m) field on axis (T) vol avg den (10**20 m-3) density averaged temp (keV) coil dimensions (m x m) 0.43 x 0.83 current density (MA/m2) 33.09

Typical Code Summary Plasma Parameters central ion temp (keV) cen ion density (10**20 m-3) cen el. density (10**20 m-3) line avg den. (10**20 m-3) max el. density (10**20 m-3) fraction fuel to electrons confinement time, taue (sec) corrected taue, (sec) stored plasma energy (MJ) volume averaged beta (%) beta star (%) fraction carbon impurity % fraction iron impurity % fraction helium 3.74 % z effective ignition margin net electric power (MW) gross electric power (MW) fusion power (MW) thermal power (MW) heating power (MW) absorbed power (MW) D-T Fusion power MW D-D Fusion power MW power in neutrons MW power in charged particles MW divertor power MW radiated power MW fuel bremsstrahlung MW carbon bremsstrahlung MW iron bremsstrahlung MW synchrotron radiation MW conduction power MW fusion power to plasma MW fraction alpha power % radiated power fraction % neutron wall load (MW/m2) radiated wall load (MW/m2) 0.075

Typical Cost Summary COST SUMMARY (M$) % of 99 % of Land Structure Bl. & 1st wl Shield Magnets Supp. Heating Primary Str Reactor Vac. S Pow Supply Impurity Cont Direct E. Conv ECH breakdown Total Heat transport Reactor Plant Turbine Plant Electric Plant Misc. Plant Eq Special Material

Typical Cost Summary Cost 90 Total Dir Cost percentages Cost 91 Construction of total Cost 92 Home office Cost 93 Field office Cost 94 Owner's costs Cost 96 Proj. Contingency Cost 97 Constr Interest Cost 98 Constr Escalation Cost 99 Total Capital [90] Unit direct cost, UDC [94] Unit base cost, UBC [99] Unit total cost, UTC Capital return [40-47,51] O&M costs [50] B/FW replacement Decomissioning allow [02] Deuterium fuel 0.03 Cost of Electricity, COE in 2004$, in 1992$

Typical Cost Summary Cost 90 Total Dir Cost percentages Cost 91 Construction of total Cost 92 Home office Cost 93 Field office Cost 94 Owner's costs Cost 96 Proj. Contingency Cost 97 Constr Interest Cost 98 Constr Escalation Cost 99 Total Capital [90] Unit direct cost, UDC [94] Unit base cost, UBC [99] Unit total cost, UTC Capital return [40-47,51] O&M costs [50] B/FW replacement Decomissioning allow [02] Deuterium fuel 0.03 Cost of Electricity, COE in 2004$, in 1992$

Typical Mass Summary MASS SUMMARY (tonnes) total hf coil mass total vf coil mass 0.00 total coil mass bucking cyl mass 0.00 shield mass total blanket, reflector, wall total structure mass 1.39 total nuclear island mass utilization efficiency, kwe/tonne

Cost Element Breakdown COST COMPONENTS Cost 20 (Land) = Cost 21.1 (site improvements) = Cost 21.2 (reactor building) = Cost 21.3 (turbine building) = Cost 21.4 (cooling system) = Cost 21.5 (PS building) = Cost 21.6 (misc. buildings) = Cost 21.7 (vent. stack) = Cost 21 (Structure) =

Cost Element Breakdown COST COMPONENTS Cost (FW) Cost (BL) Cost (Bl. & 1st wl.) % Cost (Shield) % Cost mod. coils Cost VF coils Cost divertor Cost (coils) = % Cost (Heating) Cost (Primary Str.) Cost (Vac. Sys.) Cost (Power Sup.) Cost (Imp. Control) Cost (Dir. Ener. Conv Cost (ECH) = Cost 22.1 (Core) =

Cost Element Breakdown Cost prim. coolant Cost interm. coolant Cost sec. coolant Cost 22.2 (Heat transport) Cost 22.3 aux. cooling Cost 22.4 rad. waste Cost fuel injection Cost fuel processing Cost fuel storage Cost atm T recover Cost H2O T recover Cost BL T recover Cost 22.5 fuel handling Cost 22.6 other plant equip Cost 22.7 I&C Cost 22 (Reactor Plant)

Cost Element Breakdown Cost 23 (Turbine Plant) Cost 24 (Electric Plant) Cost 25 (Misc. Plant Eq.) Cost 26.4 other materials Cost 26.5 Ar gas cover Cost 26 (Spec. Matls.) 0.781

Steps Needed to Complete Optimization/Systems Code Analysis Blanket/shield refinements – transition region – case-dependent limits and ln(p wall ) shield thicknesses Costing algorithms – resolve differences comparing with previous ARIES values – calculate coil case thicknesses from forces – complete few remaining cost accounts – add any new features requested at this meeting Optimization logic – determine why minimizing capital cost uses COE instead and minimizing leads to strange results – update impurity treatment Finish addition/debug cycle; modify summary?

Questions What new features should I add to my optimization/ systems code output? – what features in ASC output were important? – need same format as other ARIES summaries where applicable? (stellarator parameters differ from tokamak parameters) Costing algorithms – want costs in 1992 or 2004 values? both? – using LSA = 2, want LSA = 1 values? other LSA values?? – include liquid coolants in blanket/shield masses?

Summary Added geometry for blankets, shields, vacuum vessel and coils for four plasma/coil configurations Added five blanket/shield models Added LSA = 2 and 1 in costing algorithms Checking costing algorithms against ARIES-AT, ARIES-RS and SPPS results Compared results against 1-D POPCON calculations Identified work needed to complete optimization/ systems code analysis