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