Transcript 020314_CryoDesign_GG.ppt

NCSX CRYOGENICS DESIGN
DEVELOPMENT STATUS
WBS-63
March 14, 2002
GJG
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
March 14, 2002
GJG
NCSX SITE EQUIPMENT STATUS
PBX-M (ORNL)
beamline’s dewar
hookup:
1. LN2 & LHe
Transfer Lines
2. Control Valves &
Misc. Elements
March 14, 2002
1.
1
2.
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NCSX SITE EQUIPMENT STATUS
PPPL care taking
staff has carefully
removed and
stored the transfer
lines, valves, etc.
2.
1.
Upcoming effort will
remove and
retain:
1. Twin bayonet
heads
2. LN2 -traced LHe
rigid lines
March 14, 2002
GJG
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!
March 14, 2002
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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
March
14, 2002 the overhead door.
through
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NCSX SITE EQUIPMENT STATUS
The shed is
past due for
corrosion
control and
paint.
The dewar
scale
(mandatory
for ops)
requires
rehab or
replacement
March 14, 2002
Dewar Scale
Assembly
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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.
March 14, 2002
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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.
March 14, 2002
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NCSX SITE EQUIPMENT STATUS
Unfortunate conflict:
The service entrance
and main “tee”for
the LN2 -traced
LHe rigid lines
rests on the soonto-be-dismantled
north shield wall
March 14, 2002
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SIMPLIFIED LIQUID CRYOGEN DISTRIBUTION
Beamline #4
Beamline #3
Beamline #2
N.C. Alarm
Response Valve
Vent to High Bay
Beamline #1
LN2 Dewar
Cryostat & Field Coil
Vent to Stack
Skid Mount
LHe Dewar
March 14, 2002
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SIMPLIFIED LN2 FIELD COIL COOLING SUPPLY
FIELD COIL HEAT EXCHANGER
CLOSED, PRESSURIZED PRIMARY
OPEN, BOILING SECONDARY
TX
TX
(52 psia)
For 90 K
PX
PX
Ops
P
P
LN2 MAKEUP
March 14, 2002
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45 @ 15 lpm
.36 MPa
Field Coil Flow Paths
Hermetic
Suction/Expansion
Tank
CLOSED, PRESSURIZED PRIMARY
RESISTIVE
OPEN, BOILING SECONDARY
PX
TX
PX
PX
PITOT/STATIC ASS’Y
HEATER
DIFF PRESS TO ATM
FIELD COIL HEAT EXCHANGER
SUPPLY TEMP
OUTDOOR VENT
(SAFETY) STACK
PITOT/STATIC ASS’Y
SIMPLIFIED GN2 CRYOSTAT COOLING SUPPLY
M
NCSX
OUTSIDE BUILDING
M
LN2 SUPPLY
RESISTIVE
HEATER
March 14, 2002
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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
March 14, 2002
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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?)
March 14, 2002
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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
March 14, 2002
GJG