1. 1 Lane Carlson ARIES Pathways Project Meeting Gaithersburg, MD, Oct 13-14, 2011 Substantiating the ASC & Implementing the DCLL Blanket

2. 2 ASC Progress New! Continuing code modifications to improve credibility, transparency and to add DCLL blanket functionality. Power flow diagram to visualize power balance. Errors in power flow and balance corrected. Errors in radial component builds corrected. Preliminary DCLL strawmen presented for comments.

3. 3 ARIES Design Nomenclature NameBlanketPhysicsStrawman Point ACT-ISCLL (SiC self-cooled PbLi)AggressiveIssued April 2011 ACT-IbSCLLAggressiveRe-issued June 2011 ACT-IISCLLConservativeIssued April 2011 ACT-IIIDCLL (dual-coolant PbLi)AggressiveForthcoming ACT-IVDCLLConservativeForthcoming

4. 4 Action Items Progress from July 2011 meeting Action items from last meeting:  Complete DCLL system code model  Complete generic radial build coding  Issue DCLL strawmen ACT III & IV Status Completed Ongoing Forthcoming - preliminary strawmen presented today

5. 5 Power Flow Diagram Show in OmniGaffle

6. 6 1 st error: trying to split the fraction of neutrons to the blanket twice in a redundant manner and not clearly designating IB and OB. This caused a lower P_thermal. 250 MW reclaimed; ensured counting is not redundant 2 nd error: not counting the P_rad_edge fraction to the blanket. 15 MW reclaimed; all power fractions now accounted for 3 rd error: unclear in designation between power required to do the task and electrical power required. All losses are the electrical power required minus the required power. 50 MW reclaimed; terminology described explicitly Power Balance Errors

7. 7 ✓ Power Balance Check ✓ ✓ ✓

8. 8 SiC Component Builds Corrected ACT-Ib Updated VV & HT shield ragged edge meshing HT shield – VV gap too large All gaps were verified IB div missing

9. DCLL Component Builds Corrected DCLL test case - Before After - Radial build mimics input file gap VV/TF coil obstruction Skeleton ring – VV gap too large IB HT shield missing IB div missing DCLL blanket implementation complete

10. 10 Preliminary DCLL Strawmen Proposed ARIES-ACT-III (DCLL blanket, aggressive physics) R ~ 7.5 m, a = 1.875 m, β N ~ 0.046, NWL ave ~ 2.53 MW/m 2, elongation = 2.0 ARIES-ACT-IV (DCLL blanket, conservative physics) R ~ 8.75 m, a = 2.19 m, β N ~0.028, NWL ave ~2.16 MW/m 2, elongation = 2.2 Divertor is helium-cooled All costing is 2009$ Divertor is helium-cooled All costing is 2009$

11. 11 Systems code scanning parameters used DCLL blanketRangeResolution R [m]6 - 9 0.25 B T [T]5.5 - 9.00.25 βNβN 0.025 - 0.0580.001 Qcyl (q95)3.6 – 6.00.2 Q gain15 - 402.5 n/n Gr 0.7 – 1.00.05 Impurity fraction0.001 - 0.0030.001 Plasma elongation2.0 - 2.20.2  ~1 M+ points

12. 12 Filtering the data DCLL blanketACT-III (aggr.)ACT-IV (cons.) P_net_elec1000 ± 25 MW Q_Peak_Divertor< 7.5 MW/m 2 < 9.0 MW/m 2 Bt_max [T]6 – 18 H98< 1.8< 1.4 n/nGr< 1 Kappa= 2.2= 2.0 βNβN ~4.5 – 6.0~ 2.5 – 3.0

13. 13 * All costing is 2009$ ** H98 is based on total power including radiation ACT-III DCLL Preliminary Strawmen Points for Discussion Aggressive physics Note:βNβN R (m)B T (T)n/n G r H 98 **f BS P aux (MW) COE (mills)* Db # Pt # prefere ntial 0.0467.55.511.7520.779124.167.40 1156068 Lowest COE 0.04276.2511.7580.77389.8364.98 1130793 Lowest R 0.0457.255.7511.7970.79597.465.90 1252676 Lowest Bt 0.0457.55.50.951.7460.729110.765.85 196845 Highest Bt 0.047.56.250.951.7640.736109.167.55 177308 Q gainQdivoutb (MW/m 2 ) Qdivinb (MW/m 2 ) Ip (MA)q 95 kappaPrecir (MWe) Ptherma l (MWth) Ave neutron wall flux (MW/m 2 ) 22.57.413.0412.964.62.2380.843189.62.53 307.453.0712.6552.2298.033050.02.81 27.57.072.9212.554.82.2316.393036.32.60 257.202.9413.554.42.2339.433147.82.51 256.832.7913.5552.2332.703100.52.48

14. 14 ACT-IV DCLL Preliminary Strawmen Points for Discussion Conservative physics 14 * All costing is 2009$ ** H98 is based on total power including radiation Note:βNβN R (m)B T (T)n/n G r H 98 **f BS P aux (MW) COE (mills)* Db # Pt # prefere ntial 0.0288.757.511.320.562201.179.95 219889 Lowest COE 0.0298811.380.603170.975.15 21504 Lowest R 0.0277.75911.390.582205.378.78 282853 Lowest Bt 0.0318.5711.320.553208.576.41 24427 Highest Bt 0.0277.75911.390.582205.378.78 282853 Q gainQdivoutb (MW/m 2 ) Qdivinb (MW/m 2 ) Ip (MA)q 95 kappaPrecir (MWe) Ptherma l (MWth) Ave neutron wall flux (MW/m 2 ) 157.692.9814.95.42532.413517.12.16 17.58.823.4314.015.62483.303469.92.56 158.883.4414.745.82553.953603.02.81 158.463.2815.194.82555.563654.92.37 158.883.4414.745.82553.953603.02.81

15. 15 Would like guidance on: Edge radiation inboard/outboard split. Power fraction to low-temperature FWBS (inboard/outboard) and divertor. 1%? DCLL pumping power split between PbLi and helium. DCLL pumping power split between inboard/outboard. SiC blanket pumping power split between inboard/outboard.

16. 16 Summary & Future Work Modifications continue to enhance & clarify the ASC. Power balance diagram visualization. Output file will indicate if power balance fails. Component builds fixed for SiC & DCLL. DCLL preliminary strawmen suggested.  Implement anticipated changes to ACT-Ib and re-issue as ACT-Ic.  After consensus, formally issue ACT-III, IV. All formally-issued strawmen avaialable online: http://aries.ucsd.edu/ARIES/WDOCS/system.shtml

17. 17 ASC Legend 25.xls “Mods”