1. Comments on ARIES-ACT 10/20/2010 Pre-Strawman
L. El-Guebaly
Fusion Technology Institute
University of Wisconsin-Madison
Contributors:
L. Carlson (UCSD), L. Waganer (Boeing)
ARIES Project Meeting
Bethesda, MD
October , 2010

2. ARIES-ACT Pre-Strawman
Key features:
New costing scheme (from L. Waganer).
Cost evaluated in 2010 dollars (1992$ x = 2010$, per L. Waganer).
No LSA factors.
Aggressive technology:
LiPb/SiC blanket
~ 58% th
He-cooled divertor
LT S/C TF magnet with LN shield.
Two cases examined:
ARIES-ACT with Aggressive Physics and magnet design
ARIES-ACT with Conservative Physics and magnet design.
a la ARIES-AT
unlike ARIES-AT

3. Designs ARIES-ACT ARIES-ACT ARIES-AT Aggressive Physics
R = 5.5 m
a = 1.4 m
Ave. NWL < 2.2 MW/m2
Elongation = 2.2
( Kink shell behind FW ?)
ARIES-AT
R = 5.2 m
a = 1.3 m
Ave. NWL = 3.3 MW/m2
Elongation ~ 2.2
( Kink shell between blkt segments)
ARIES-ACT
Conservative Physics
R = 6.5 m
a = 1.6 m
Ave. NWL =
< 1.8 MW/m2
Elongation = 2.0
( Kink shell behind FW ?)

4. Radial Builds (to be checked / updated)
ARIES-AT ARIES-ACT ARIES-ACT
Average NWL (MW/m2) 3.3 < 2.2 < 1.8
Thickness (cm)
Inboard:
FW/Blanket
HT Shield VV
Outboard:
FW/Blanket ? ?
HT Shield 15 ? ?
VV 25 ? ?
Top / Bottom:
Divertor ? ?
Replaceable HT Shield 15 ? ?
HT Shield 30 ? ?
VV 40 ? ?

5. ASC Volumes ARIES-ACT volumes for 1/16th of torus? Masses?
VV volume includes side walls of ports?
Shield volume includes penetration shield?
PF coil volume includes spares?

6. Costing Accounts 20 Land and Land Rights
21 Structures and Site Facilities
22 Power Core Equipment
23 Turbine - Generator Equipment
24 Electric Plant Equipment
25 Heat Rejection Equipment
26 Miscellaneous Plant Equipment
27 Special Materials (cost of LiPb)
90 Direct Cost
Indirect Cost
99 Total Cost
Cost of Electricity (COE) in mills/kWh

7. Cost Comparison Significant differences ($60-770M) to be checked:
Account 21 - Structures and Site Facilities
Account 22 - Power Core Equipment
Account 23 - Turbine - Generator Equipment
Account 27 - Special Materials
Les to check Indirect Cost Accounts #
Significant difference (> $1B) to be checked:
Account 22 - Power Core Equipment

8. Cost of Individual Components
ARIES-ACT
ARIES-ACT

9. Account 27 - Special Materials
ARIES-ACT:
Special Materials ; Too low for LiPb
Primary coolant (AT was LiPb) ;
Divertor coolant (AT was in primary) ;0
Intermediate Loop Coolant ;0
Turbine cycle Working Fluids ;0
Other Special Materials ;
Argon Power Core Cover Gas ;0.4017
LiPb cost should be ~ $140M for ARIES-ACT and ~ $170M for ARIES-ACT
= Volume of LiPb in FPC x x LiPb unit cost
Factor of 2.5 accounts for LiPb in outer loop outside FPC.

10. Economic Impact of He-Cooled Divertor
The following accounts should reflect increase in cost for dual coolants (He for divertor and LiPb for blanket/shield):
Account 22.6: Main Heat Transfer and Transport
Account 23: Turbine - Generator Equipment
Account 25: Heat Rejection Equipment.

11. ARIES-ACT Recirculating Power
P_recirc = Pgross - Pnet   = =  260 MW
P_gross_electric = eta_brayton * P_thermal
= * = MW
Breakdown:
P_recirc =
P_plasma_heating / eta_plasma_heating (11.3 / .43) = 26.3
+ P_cd_generic / eta_cd_generic ( / 0.5) = 104.6
+ P_aux_func (50) = 50
+ P_cryo (2) = 2
+ P_pump_blanket / eta_pump ( / 0.9) = 4.8
+ P_pump_divertor / eta_pump ( / 0.9) = 72.4
260 MW

12. ARIES-ACT Recirculating Power
P_recirc = Pgross - Pnet   = =  MW
P_gross_electric = eta_brayton * P_thermal
= * = MW
Breakdown:
P_recirc =
P_plasma_heating / eta_plasma_heating (4.8 / 0.43) = 11.2
+ P_cd_generic / eta_cd_generic (110.1 / 0.5) = 220.2
+ P_aux_func (50) 50
+ P_cryo (2) 2
+ P_pump_blanket / eta_pump ( / 0.9) = 4.7
+ P_pump_divertor / eta_pump (79.66 / 0.9) 88.5
376.6 MW

13. Recirculating Power Comparison
Reasons for large differences?
Plasma heating
Current drive
Updates:
Combine cryogenic and auxiliary powers.
Scaling from ITER:
~ 30 MW miscellaneous
~ 25 MW LHe cryoplant
~ 10 MW LN cryoplant
~ 65 MW Total
He-cooled divertor requires MWe of pumping power.
90% of He pumping power is recoverable as friction power.
However, it results in larger fusion power with sizable design to deliver net 1 GWe.

14. COE (to be updated)

15. To Be Checked / Updated Breeding capacity of blanket: Radial build
Overall TBR: 1.1 or 1.08?
Li-6 enrichment: 90% or 70%?
Impact of Stabilizing Shells?
Radial build
Need LT TF magnet info:
Coil case thickness and material
WP thickness and composition
LN shield thickness and composition.
Costing Accounts # 21, 22, 23, 25, 27
Need costing algorithms for all accounts.
Cost of individual components.
Decommissioning cost (should vary with radwaste volume and level of waste).
Higher unit costs for:
Nuclear grade materials
Safety-related components.