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Facility Systems (WBS 62-65)

Facility Systems (WBS 62-65). L. Dudek, G. Gettelfinger, M. Kalish. Facility Systems. Water Systems (WBS 62) Cryogenic Systems (WBS 63) Utility Systems - GN 2 , Air, Vent (WBS 64) Helium Bakeout (WBS 65). Water Cooling System Requirements. Provide water cooling for NBI

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Facility Systems (WBS 62-65)

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  1. Facility Systems (WBS 62-65) L. Dudek, G. Gettelfinger, M. Kalish Larry Dudek Slide 1

  2. Facility Systems • Water Systems (WBS 62) • Cryogenic Systems (WBS 63) • Utility Systems - GN2, Air, Vent (WBS 64) • Helium Bakeout (WBS 65) Larry Dudek Slide 2

  3. Water 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 Larry Dudek Slide 3

  4. Water Systems P&ID

  5. Cryogenic 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 Larry Dudek Slide 5

  6. LN2 Coil Cooling Field Coil Heat Exchanger Closed, Pressurized Primary Open, Boiling Secondary TX Secondary in GN2 Cryostat Cooling System (WBS 633) Hermetic Suction/Expansion Tank .36 MPa (52 psia) For 90 K Ops Field Coil Flow Paths 45 @ 15 lpm (4 gpm) TX PX PX P P LN2 MAKEUP From LN2-LHe Supply System (WBS 6311) P- Pump PX - Pressure Transmitter TX - Temperature Transmitter P Larry Dudek Slide 6

  7. GN2 Cryostat Cooling Pitot/static Ass’y Supply Temp Outdoor Vent (Safety) Stack Primary in LN2 Coil Cooling System (WBS632) Diff Press To Atm Field Coil Heat Exchanger Closed, Pressurized Primary Open, Boiling Secondary Resistive Heater PX PX TX Pitot/static Ass’y PX M NCSX LN2 Supply From LN2-LHe Supply System (WBS 631) M Outside Building M- Damper PX - Pressure Transmitter TX- Temperature Transmitter Resistive Heater Larry Dudek Slide 7

  8. LN2 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 Larry Dudek Slide 8

  9. Helium 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 Larry Dudek Slide 9

  10. 24 kW Helium bakeout system 150 C 165 C NCSX 62 kW Heater • 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 127 C 155 kW HEX #1 56 C Bypass Cooling 32 C 60 kW Valve HEX #2 Water 270 psi Blower Assy. 19 C 250 psi RV Orifice 21 kW Pressure Regulating Valve

  11. Blower and Motor with Housing Retracted (NSTX Skid) Larry Dudek Slide 11

  12. Facility Systems Cost and Schedule WBS Cost w/o Cont Cont% Cont $ • Facility Systems will be made operational in time for subsystem testing Larry Dudek Slide 12

  13. Conclusions • 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 Larry Dudek Slide 13

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