ARIES Systems Code Development & Results

1. ARIES Systems Code Development & Results Lane Carlson1, Mark Tillack1, Farrokh Najmabadi1, Charles Kessel2 1 University of California, San Diego & 2 Princeton Plasma Physics Lab US/Japan Workshop on Power Plant Studies UC - San Diego March 8-9, 2012

2. Outline of Progress Improving and substantiating the ARIES Systems Code (ASC) Documentation and ASC homepage Strawmen points issued VASST GUI for visualizing data

3. ASC Flow of Calculations (medium detail) • Systems code consists of modular building blocks • Two modes of operation • Adjustable input files

4. Power Flow Diagram Ensures Power Accountability

5. Power Flow Diagram (zoomed-in)

6. ✓ Power Balance Verified ✓ ✓ ✓

7. Generic radial build implemented • Generic radial build allows true modularity of blankets to add components as required. • Items not in use are given a thickness = 0.

8. ASC Constructs Radial Builds for Both Blankets ACT-SA (c) SCLL DCLL test case Vacuum vessel Manifolding area Divertors Blankets I & II Central solenoid & bucking cylinder HT Shield IB blanket & first wall

9. All-encompassing ASC Homepage • History • Documentation • Modifications • Equations • Code Modules • Input & outputs • Examples • Flow of calculations • Power flow diagram • Reference documents • Old documentation • Strawmen Points • VASST http://aries.ucsd.edu/carlson/aries/

10. Documentation page 1/5 All modifications are listed to archive changes • Modifications: • Subversion SVN version control • SVN history log • Modifications sheet (ASC_mods.xlsx)

11. Documentation page 2/5 All equations are listed, explained and referenced • Equations: • Volume calculations • Blanket, divertor pumping powers • First wall and divertor heat flux • Power summation • Gross cycle efficiency • Current drive • Part construction, references and constraints Part or calculation Ref. docs, where this resides in the code, notes Equations, notes, assumptions Defined variables and explanations

12. Documentation page 3/5 Code’s C++ modules explained • Code Modules (C++): • Physics, Aries, Cost, Costing Accounts, Design Point, Geometry, Part.cpp Code module • Date of documentation • ASC version (SVN #) • Module name • History of the module • Notes on module and its purpose • Reference docs (viewable on ASC Documentation page)

13. Documentation page 4/5 Input files are more easily modified • Input files: • Raw data file from physics module • Setup files – choose divertor, blanket, scanning mode • Runaries script – designates points to scan • Radial build input file – IB, OB, vertical • Materials – name, purpose, density, cost, cost basis year • Inflation factors • Costing parameters • Magnets – TF and PF coil parameters • Power flow – neutron multiplication factors, efficiencies, power flow fractions

14. Documentation page 5/5 Output files & reference docs • Output files: • Raw data output file • Part files for CAD drawings • Costing accounts and algorithms • System engineering summary • Powers and heat fluxes summary • Inflation factors, material properties, part compositions printouts • Flow of calculations diagram – flow of the code structure • Power flow diagram – complete listing of all power fractions, power flow, generated, lost and recovered heat. • Reference documents – spreadsheets, papers, journal articles, etc. from contributing team members to reference equations, assumptions and hard numbers in the systems code. • Old reference documents – for archival purposes.

15. ARIES ACT Strawmen Designs • Two blanket designs: advancedSCLL technology and conventional DCLL • Two physics regimes: advanced (βN 0.04-0.06) and conventional physics (βN ~0.03) • => 4-corners scanning approach to cover parameter space All formally-issued strawmen available online: http://aries.ucsd.edu/carlson/aries/

16. Strawmen Points Page • Version • History/overview • Four-corners approach • Strawmen issued • Name • Date • Blanket • Physics • ASC version • Notes • Filtering sequences

17. Easier-to-read part printouts combine all part parameters ACT-SA (c) strawman link

18. Some example scanning parameters Preliminary filtering: • Pnelec = 1000 MW ± 25 MW • Divertor (in/outboard) limit < 15 MW/m2 • BTmax = 6 - 18 T System scans done on cluster computer with 100’s nodes Large system scans can produce 106 - 108 points

19. VASST Webpage • VASST Version • Overview • Filtering sequences • Samples • Screenshots

20. VASST-Visual ARIES Systems Scanning Tool v.7 Number of design points in database Auto-labeling Color bar scale Pull-down menus for common parameters Save plot All self-consistent design points displayed Correlation coefficient Specific data point info available here Multiple filters can be added Slider bars filter points in real time

21. VASST Filtering Sequence • Used to help find ACT-SA strawmen points

22. Summary • ASC continues improvements and is ready to be run • All-encompassing documentation of systems code and ASC Homepage • Preliminary strawmen for ARIES Physics & Technology Assessmentissued • VASST visualization tool provides visual interaction with systems code database