1. 26 Jan 20111 Lane Carlson, Charles Kessel Mark Tillack, Farrokh Najmabadi ARIES-Pathways Project Meeting San Diego, CA Jan 26-27, 2011 Needful Systems Code Modifications

2. 26 Jan 20112 Overview ASC has undergone many error corrections and modifications. Laila’s comments on Oct. 2010 strawmen addressed. Verification of internal algorithms, hardwired numbers, power fractions, comments to code nearly complete. Continuing to update documentation and track changes. Last meeting’s actions items completed: Output formatting cleaned up, included radial builds Included He systems, costing for DCLL blanket New pumping power models implementation Note: all comments on costing, volumes, etc. are comparing the aggressive strawman case, ACT

3. 26 Jan 20113 Input Needed, Received WaganerNew fabrications costs, algorithms, updated GDP El-GuebalyASC output formatting, NWL distribution, core radiation TillackMHD, DCLL blanket pumping power correlations RognlienEdge power flows KesselRevised physics scans Wang, BurkeDivertor pumping power correlations

4. 26 Jan 20114 Needful error corrections & modifications to the systems code Mod #, date, Error correction or modification Lines of code affected Person responsible for input Status - complete, in progress, or pending Notes

5. 26 Jan 20115 Laila’s comments on strawmen from last meeting have been addressed Radial build now included Volumes were missing 16x factor VVx16 = 269 m^3 (was 16.8) BCyl = 39.8, OK, confirmed by hand calc from CAD PF coils total = 53 (was 3.3) Cryodome = 1088 (65) … ARIES-ACT volumes for 1/16 th of torus? Yes Masses? Yes, OK VV volume includes side walls of ports? Yes Shield volume includes penetration shield? No, TBD PF coil volume includes spares? Not in vol, only in cost, 14 spares

6. 26 Jan 20116 Addressing Laila’s comments continued Costs: Account 22 power core equipment now 1.46 B$ (was 2.1) Bucking cylinder was erroneously multiplied by 16. Cost is now 30.7 M$ (538) aggr case Uppercap = 3.5 M$ (was 59) lowercap = 2.1 M$ (35) cryodome = 9 M$ (144) VV ok = 232 M$ Plasma confinement, acct 22.2.0 = 497 (1040) Cryostat, acct 22.2.1.4 = 144 (158) Special materials: Code now incorporates the 2.5x factor to account for Pb-Li in plumbing and outer loop outside fusion power core With correction, 27.0 account now = 144M$ ACT (was 58) Total Mass of Liquid Coolant (DCLL, none in divertor) = 2596.7 (AT was 5269 tonnes)

7. 26 Jan 20117 Addressing Laila’s comments continued Recirculating Power: Code now incorporates 63 MW Paux (50) Cryo is still separate. Using 2 MW for low temp SC. Current drive power (unchanged) We are working on refining pumping powers for divertor and blanket designs. COE: ACT aggr = 62.0 mills/kWh (2009$), (was 70.28)

8. 26 Jan 20118 Check P_recirculation (aggressive case) P_recirc = 232 MW * Blanket and divertor pumping powers have been refined (DCLL). * MW 105 63 26 23 13 2

9. 26 Jan 20119 Strawmen ASC aggr $M Strawmen ASC vol (m^3) 16x removed on cost $M Vol (m^3)ARIES- AT $M ARIES- AT vol (m^3) Bucking cylinder 52639.8 (OK, verified w/ CAD) 30.7 (was redundant 16x) 39.8 (OK)~ <20~25 Upper cap 394.523.570 (OK)~ <20~ <10 Lower cap 352.662.141 (OK)~ <20~ <10 Cryo dome 158651441041 (verified w CAD) -- 16x multiplier is currently used to break all the components into slices between the 16 TF coils - difficult to track! LCC comments on some volumes and costs

10. 26 Jan 201110 Vacuum Vessel Volume Where is the split between “main” and “outboard” volume? VacuumVesselMain = 129.679 VacuumVesselOutboard = 138.93 Total Vacuum Vessel: 268.608

11. 26 Jan 201111 Plasma surface area erroneously included divertor surface areas Plasma surface area was FW + div surface area = 696 m 2 Now, plasma surface area is plasma surface area = 497 m 2 NWL becomes more realistic = 3.1 MW/m 2 (2.2)

12. 26 Jan 201112 Neutron power distribution, power balance Old f_geo_div overestimated power flow into divertor (~27%) From Laila, 10% Pn deposited in divertor, 25% in IB blanket, 65% in OB blanket (A=4) Power balance sanity check and visualization underway (Tillack) 10% 25%65%PnPn

13. 26 Jan 201113 Pumping Powers - Divertors Prior pumping power was divided 50:50 between blanket and divertors for SiC. Now we are implementing more fidelity (Wang, Burke). Ppower for divertor designs now include: Plate, no fins T-tube Finger Capability > 5 MW/m 2 ASC limits use to data range given

14. 26 Jan 201114 Pumping Powers - DCLL Blanket Includes: He pumping power in FW/blanket Detailed MHD pumping power for Pb-Li in blanket (details Tillack) ASC limits use to data range given Blanket thermal = Pn*M+FW Prad

15. 26 Jan 201115 Les’s new costing, GDP, algorithms Modified inflation factors after new GDP effective Nov. 2010 with 2005 year basis. Costing algorithm updates mainly in: 21.0 Structures and site facilities 22.06 Main heat transfer and transport 23.0 New turbine generator plant equipment costs OLD c_23[0] = 243.34e6*(P_elec_gross/1200) 0.83 NEW c_23[0] = 360e6*(P_thermal_gross/2000 )0.8 *(eta_brayton/0.6) Some material costing questions updated and gaps in data cleared up. New costing for high-purity Helium added, $70/kg. Lower cost of LiPb (90% enriched) is significant $8.8/kg (22.6) 2009$

16. 26 Jan 201116 P_thermal Code erroneously used P_thermal total (FWBS + div) in pumping power calculations without distinction. Working to implement recoverable thermal heat from MHD liquid-metal and He pumps. Different pump efficiencies for He (90%) & LM MHD pump (40%). LM MHD pumps have low pumping efficiency (~40%) but up to 80% of thermal heat imparted to fluid through pumping and pressure drop can be recovered (Tillack, Morley). For aggr case, P_pump_blanket = 13.3 MW, 33.3 MW wall-plug req’d, 26.6 MW recoverable. With thermal-to-elec efficiency ~50%, overall P_pump_blanket = 19.95 MW. Helps P_net_electric = 1023.4 MW (was 1003.5)

17. 26 Jan 201117 Systems Code Flow Chart (medium detail) Working on detailed flow chart of engineering module

18. 26 Jan 201118 Summary & Future Work Multiple errors corrected, modifications implemented. Fixed errors revealed in Oct. 2010 strawmen. Continuing documentation.  Finish correcting known errors still requiring attention.  Once final corrections have been made, “lock” the revision number and run physics cases.  Provide final strawmen after ASC overhaul.

19. 26 Jan 201119 Systems Code Modifications NOTE: See “ASC Legend 18.xls” #ModificationValue beforeValue after 1 2 3 4 5