26 Jan 2011 1
Lane Carlson, Charles KesselMark Tillack, Farrokh Najmabadi
ARIES-Pathways Project MeetingSan Diego, CA Jan 26-27, 2011
Needful Systems Code Modifications
26 Jan 2011 2
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
26 Jan 2011 3
Input Needed, Received
Waganer New fabrications costs, algorithms, updated GDP
El-Guebaly ASC output formatting, NWL distribution, core radiation
Tillack MHD, DCLL blanket pumping power correlations
Rognlien Edge power flows
Kessel Revised physics scans
Wang, Burke Divertor pumping power correlations
26 Jan 2011 4
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
26 Jan 2011 5
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 1/16th 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
26 Jan 2011 6
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)
26 Jan 2011 7
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)
26 Jan 2011 8
105
63
26
2313 2
P CD genericP auxP plasma heatingP pump divertorP pump blanketP cryo
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
26 Jan 2011 9
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
526 39.8 (OK, verified w/ CAD)
30.7 (was redundant 16x)
39.8 (OK) ~ <20 ~25
Upper cap
39 4.52 3.5 70 (OK) ~ <20 ~ <10
Lower cap
35 2.66 2.1 41 (OK) ~ <20 ~ <10
Cryo dome
158 65 144 1041 (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
26 Jan 2011 10
Vacuum Vessel Volume
• Where is the split between “main” and “outboard” volume?
• VacuumVesselMain = 129.679
VacuumVesselOutboard = 138.93
Total Vacuum Vessel: 268.608
26 Jan 2011 11
Plasma surface area erroneously included divertor surface areas
Plasma surface area was FW + div surface area = 696 m2
Now, plasma surface area is plasma surface area = 497 m2
NWL becomes more realistic = 3.1 MW/m2 (2.2)
26 Jan 2011 12
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%Pn
26 Jan 2011 13
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/m2
• ASC limits use to data range given
26 Jan 2011 14
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
26 Jan 2011 15
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 $8.8/kg
(22.6) 2009$
26 Jan 2011 16
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)
26 Jan 2011 17
Systems Code Flow
Chart
(medium detail)
Working on detailed flow chart of
engineering module
26 Jan 2011 18
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.
26 Jan 2011 19
Systems Code Modifications
NOTE: See “ASC Legend 18.xls”
# Modification Value before Value after
1
2
3
4
5
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