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NCSX CRYOGENICS DESIGN DEVELOPMENT STATUS WBS-63

NCSX CRYOGENICS DESIGN DEVELOPMENT STATUS WBS-63. PURPOSE OF STATUS REVIEW. Review serves as a design intent checkpoint These concepts will serve as the basis for the upcoming cost and schedule exercise Known requirements for technical design will be presented

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NCSX CRYOGENICS DESIGN DEVELOPMENT STATUS WBS-63

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  1. NCSX CRYOGENICS DESIGN DEVELOPMENT STATUSWBS-63

  2. PURPOSE OF STATUS REVIEW • Review serves as a design intent checkpoint • These concepts will serve as the basis for the upcoming cost and schedule exercise • Known requirements for technical design will be presented • Approximate schedule for estimate will be discussed

  3. NCSX SITE EQUIPMENT STATUS • PBX-M (ORNL) beamline’s dewar hookup: • LN2 & LHe Transfer Lines • Control Valves & Misc. Elements 1. 1 2.

  4. NCSX SITE EQUIPMENT STATUS • PPPL care taking staff has carefully removed and stored the transfer lines, valves, etc. • Upcoming effort will remove and retain: • Twin bayonet heads • LN2 -traced LHe rigid lines 2. 1.

  5. NCSX SITE EQUIPMENT STATUS • The 9,000 gallon LN2 tank is in service and will soon support the Hall Thruster Project at less than 200 gallons per day • The NCSX heat load (updated 3/13/02) is about 6,000 gallons (one trailer) per plasma day • This tank is fine!

  6. NCSX SITE EQUIPMENT STATUS Helium Dewar Shed: The PBX-M implementation of the ORNL beams featured a once-through, then vent to atmosphere LHe system. NCSX should use the same approach. A 1000 gallon portable dewar is forked from the vendor’s trailer and moved through the overhead door.

  7. NCSX SITE EQUIPMENT STATUS The shed is past due for corrosion control and paint. The dewar scale (mandatory for ops) requires rehab or replacement Dewar Scale Assembly

  8. NCSX SITE EQUIPMENT STATUS The LHe spear, hose, and phase separator are in serviceable condition. Some new seals and start-up labor will be required.

  9. NCSX SITE EQUIPMENT STATUS This is an example of LN2-traced LHe cryo line and is very similar to the lines in the PBX-M area.

  10. NCSX SITE EQUIPMENT STATUS • Unfortunate conflict: • The service entrance and main “tee”for the LN2 -traced LHe rigid lines rests on the soon-to-be-dismantled north shield wall

  11. SIMPLIFIED LIQUID CRYOGEN DISTRIBUTION Vent to Stack Vent to High Bay LN2 Dewar Cryostat & Field Coil Beamline #1 Beamline #2 Beamline #3 Beamline #4 N.C. Alarm Response Valve Skid Mount LHe Dewar

  12. P SIMPLIFIED LN2 FIELD COIL COOLING SUPPLY FIELD COIL HEAT EXCHANGER CLOSED, PRESSURIZED PRIMARY OPEN, BOILING SECONDARY TX Hermetic Suction/Expansion Tank .36 MPa (52 psia) For 90 K Ops Field Coil Flow Paths 45 @ 15 lpm TX PX PX P P LN2 MAKEUP

  13. SIMPLIFIED GN2 CRYOSTAT COOLING SUPPLY OUTDOOR VENT (SAFETY) STACK PITOT/STATIC ASS’Y SUPPLY TEMP DIFF PRESS TO ATM FIELD COIL HEAT EXCHANGER CLOSED, PRESSURIZED PRIMARY OPEN, BOILING SECONDARY RESISTIVE HEATER PX TX PX PITOT/STATIC ASS’Y PX M NCSX LN2 SUPPLY M OUTSIDE BUILDING RESISTIVE HEATER

  14. WBS-63 REQUIREMENTS • Vent effluent gases without personnel injury • Survive worst probable indoor liquid spill without personnel injury • Deliver about 6000 LN2 gal/day to cryostat, field coil cooling, and beam pumps • Deliver about 200 liters/day LHe to beam pumps for PBX-M-style beam ops

  15. WBS-63 REQUIREMENTS, CONTINUED • Remove 6E7 kJ/pulse from field coils at ABOUT a flow rate of 15 l/s and pressure drop of 1.4 MPa to support a 15 minute machine cycle. • Circulate warming and cooling GN2 around machine at *** kg/sec (pressure drop?) to support a thermal cycle of time of *** hours (days?)

  16. INTERFACE CONTROL - WHO HAS THE WBS BALL? WHO PAYS? • Oxygen Level Monitors – Multiple Locations • N2/Air Exchange Emergency Blower • Changes Air in TC VERY Quickly • Needs Review, Maybe Not Necessary (NC valve?) • Magnet Coolant Flow Monitoring • Magnet Flow Balancing Valves/Plumbing • Cryostat High/Low Pressure Monitor and Control Algorithms • High Current 480 VAC circuits

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