View
221
Download
0
Category
Tags:
Preview:
Citation preview
NCSX Vacuum Vessel Overview
Paul Goranson
WBS 12 Manager
Vacuum Vessel Manufacturing Study Kickoff meeting
April 29, 2003
P Goranson, 29 Apr 2003 NCSX vacuum vessel
TOPICS NCSX Baseline Design
Status- Impact of PDR Delay
- Models
- Drawings
- PVVS Spec
- VVSA Spec Changes to Baseline
- Vessel Joint Change
- Vessel Contour Change
- Port Changes
- Ribs Removed from Task VVSA Spec Run Through
P Goranson, 29 Apr 2003 NCSX vacuum vessel
National Compact Stellarator Experiment NCSXBaseline Device Assembly
< R0 > = 1.4 m, Btor = 2 T, A = 4.3, Ip < 350 kA
P Goranson, 29 Apr 2003 NCSX vacuum vessel
Vacuum Vessel Sits Inside the NCSX Baseline Coil Set
Vacuum vessel
TF Coil
VacuumVessel
ModularCoil
Coil SupportStructure
Vessel PortExtensions
VesselSupport
P Goranson, 29 Apr 2003 NCSX vacuum vessel
Baseline Vacuum Vessel Assy concept
Shell material Inconel 625
Thickness 9.5 mm
Time constant 5.3 ms
Total wt w/ports ~ 12000 lbs
Bolted joints connect field periods
Traced with He gas lines for heating (to 150C) and cooling
Solomide foam insulation between VV and cold mass
99 separate access ports
Spacers used between field periods to provide fit-up capability
Spacer
P Goranson, 29 Apr 2003 NCSX vacuum vessel
Vessel fabrication concept
Full field period with port stubs
Individualpanels
Half field period(repeats 6 times to form complete shell)
P Goranson, 29 Apr 2003 NCSX vacuum vessel
Field period assembly concept
PortExtension
Vessel is fabricated in field periods Modular coils are rotated over field period, then port extensions are welded on Vessel is as large as possible consistent with these operations
P Goranson, 29 Apr 2003 NCSX vacuum vessel
Port extension / reinforcement concept
1. Weld on port extension and leak check weld
Torus shell
Port extension
2. Cut port extension off and after final torus leak check, cut opening thru torus
Torus shell
Port extension, part 1
3. Prep edges (Supplier) and weld port extension in place with full penetration weld from inside ( PPPL)
Torus shell
Port extension, part 1
Port extension, part 2
P Goranson, 29 Apr 2003 NCSX vacuum vessel
Vacuum Vessel Manufacturing Study is Phased
PVVS 20 degree segment evaluates fabrication
VVSA 120 degree field period follows
P Goranson, 29 Apr 2003 NCSX vacuum vessel
Data is provided in Pro-E models, drawings, STEP files and drawings in pdf format
P Goranson, 29 Apr 2003 NCSX vacuum vessel
STATUS - PDR DELAY
MINIMAL IMPACT ON VESSEL Coil changes may cause small changes to
vessel contour (fractional inches) No changes to ports No fabrication cost impact
Vessel models redesigned to be robust New ProE tools in place Fast turn around time
P Goranson, 29 Apr 2003 NCSX vacuum vessel
STATUS - PDR DELAY CONTIN. Schedule not impacted significantly
Continue to do planning, scheduling, costing with current release of specification and drawings
Revised versions of specification and drawings will be provided prior to start of prototype fabrication
Only anticipated changes will be revision to file names and models
Budgetary estimate schedule needs discussion
P Goranson, 29 Apr 2003 NCSX vacuum vessel
STATUS - MODELS
Vessel contour updated Integrated into vessel assy model
P Goranson, 29 Apr 2003 NCSX vacuum vessel
STATUS - DRAWINGS PVVS (20o segment)
Being Revised to Reflect Change in Ribs, Now Optional Feature
Updated Vessel Contour Being Incorporated This Week
VVSA (120o degree field period) Updated Vessel Contour Being Incorporated Next Two
Weeks Vessel Contour Will Be Further Updated As Required
After Design Final Clarification of Tolerances (match up of spacer to vessel)
P Goranson, 29 Apr 2003 NCSX vacuum vessel
STATUS - PVVS(20o) BUILD-TO SPEC
Spec will be revised Incorporate Updated Contour
Present drawings adequate for scheduling and costing
P Goranson, 29 Apr 2003 NCSX vacuum vessel
STATUS - VVSA(120o) BUILD-TO SPEC
Spec comment copy complete Sufficient for estimating, planning
P Goranson, 29 Apr 2003 NCSX vacuum vessel
CHANGES - Field joint is being modified from current design to avoid assembly interference
Vertical assembly flange showing interference with mod coil during assembly operation
Possible solution by tilting assembly flanges 25-30 deg off vertical
25-30 deg
VV interferes with modular coils during assy of three field periods
P Goranson, 29 Apr 2003 NCSX vacuum vessel
CHANGES - Modified Field Joint Does not Hamper Assembly
VV segments assembled VV segments retracted
P Goranson, 29 Apr 2003 NCSX vacuum vessel
JOINT DESIGN IS PRELIMINARY
Decision has not been made on joint design Costing should be based on slanted , bolted
field joint
P Goranson, 29 Apr 2003 NCSX vacuum vessel
CHANGES - Vacuum Vessel Surface Contour Has Evolved
New tools permit definition of stay in, stay out zones
- Prevent interference with Coils
- Maintain distance from plasma
- Maximize plasma
Contour chance is subtle
- Should not affect manufacturing
- Slightly less smooth
P Goranson, 29 Apr 2003 NCSX vacuum vessel
VESSEL CONTOUR CHANGE
CDR and Revised Contour Superimposed
P Goranson, 29 Apr 2003 NCSX vacuum vessel
VESSEL CONTOUR CHANGE
CDR and Revised Contour Superimposed
P Goranson, 29 Apr 2003 NCSX vacuum vessel
PORT CHANGES Port P4 modified
- Hour glass shape
- Reoriented
P4
Recommended