NCSX CDRMay 21-23, 2002

Larry DudekSlide 1

NCSX

Facility Systems (WBS 62-65)

L. Dudek, G. Gettelfinger, M. Kalish

NCSX CDRMay 21-23, 2002

Larry DudekSlide 2

NCSXFacility Systems

Water Systems (WBS 62) Cryogenic Systems (WBS 63) Utility Systems - GN2, Air, Vent (WBS 64)

Helium Bakeout (WBS 65)

NCSX CDRMay 21-23, 2002

Larry DudekSlide 3

NCSXWater Cooling System Requirements

Provide water cooling for– NBI– Torus vacuum pumping– Helium bakeout system– Diagnostics

Work scope involves adding cooling loops that tie into existing CS/HVAC water systems

Water Systems P&ID

NCSX CDRMay 21-23, 2002

Larry DudekSlide 5

NCSXCryogenic System Requirements

Provide GN2 cooling to cool the coils and structures inside the cryostat from ambient (293K) to operating (80K) temperature

Provide GN2 cooling of the structures inside the cryostat during operation

Provide closed loop LN2 cooling for modular, TF, and PF coils during operation

Provide GN2 heating to bring the coils and structures inside the cryostat back to ambient

NCSX CDRMay 21-23, 2002

Larry DudekSlide 6

NCSXLN2 Coil Cooling

Hermetic Suction/Expansion

Tank

Fie

ld C

oil F

low

Pat

hs

45 @

15

lpm

(4

gpm

)

P

P

Field Coil Heat ExchangerClosed, Pressurized Primary

Open, Boiling Secondary

PX

PX

TX

TX.36 MPa

(52 psia)

For 90 K

Ops

P LN2 MAKEUP

From LN2-LHe Supply System (WBS 6311)

Secondary in GN2 Cryostat Cooling System (WBS 633)

P- PumpPX - Pressure TransmitterTX - Temperature Transmitter

NCSX CDRMay 21-23, 2002

Larry DudekSlide 7

NCSXGN2 Cryostat Cooling

NCSX

PXTXPX

Field Coil Heat ExchangerClosed, Pressurized Primary

Open, Boiling Secondary Pit

ot/s

tati

c A

ss’y

Sup

ply

Tem

p

Dif

f P

ress

To

Atm

Out

side

Bui

ldin

gResistive

Heater

PX

Pit

ot/s

tati

c A

ss’y

M

M

LN2 SupplyFrom LN2-LHe Supply System (WBS 631)

Outdoor Vent (Safety) Stack

Resistive

Heater

M- DamperPX - Pressure TransmitterTX- Temperature Transmitter

Primary in LN2 Coil Cooling System (WBS632)

NCSX CDRMay 21-23, 2002

Larry DudekSlide 8

NCSXLN2 Storage and Delivery

Cryogenic heat loads are modest– Cooldown

• Two (2) 6,500 gallon trucks

– Bakeout (150C VV)• 15.3 kW, 2.3 trucks per week

– Not operating (20C VV)• 10.5 kW, 1.6 trucks per week

– Operating (20C VV)• 4.6 trucks per week based on 160 full

power shots per week

Existing 9,000 gallon LN2 tank will be re-used

NCSX CDRMay 21-23, 2002

Larry DudekSlide 9

NCSXHelium Bakeout System Requirements

Heat and maintain VV at 150C during bakeout – 12 kW heat loss to cold mass

Maintain VV at 20C during normal operation – 7 kW heat loss to cold mass

Heating CFC liner for 350C bakeout is a future upgrade

Helium bakeout system

Patterned after NSTX

High pressure system (270 psig) for high He density

Industrial blower (low P) inside pressure vessel more economical than compressor

24 kW available

NCSX

CoolingWater

PressureRegulatingValve

OrificeRV

Blower Assy.

BypassValve32

C

155 kW

19 C

127 C

165 C 150 C

56 C

62 kW

60 kW

24 kW

21 kW

250 psi

270 psi

H

eate

r

HEX #1

HEX #2

NCSX CDRMay 21-23, 2002

Larry DudekSlide 11

NCSX

Blower and Motor with Housing Retracted (NSTX Skid)

NCSX CDRMay 21-23, 2002

Larry DudekSlide 12

NCSXFacility Systems Cost and Schedule

Facility Systems will be made operational in time for subsystem testing

WBS Cost w/o Cont Cont% Cont $62 Cooling Water Systems $292K 20.0% $58K63 Cryogenics $728K 23.0% $168K64 Utility Systems $95K 20.0% $19K65 VV & PFC Heating & Cooling $567K 10.0% $57K66 Facility Systems Integration $165K 8.0% $13K

NCSX CDRMay 21-23, 2002

Larry DudekSlide 13

NCSXConclusions

Cost, schedule, and technical risks have been minimized in Facility Systems– Adapting an existing design minimizes risks in the

Helium Bakeout System (WBS 65)– Having LN2 delivered instead of having on-site

refrigeration greatly simplifies the Cryogenic Systems (WBS 63) design

– Facility Systems are designed with commercial, off-the-shelf components utilizing standard construction techniques