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NSTXNSTX NSTX Center Stack Upgrade
Ensure fatigue resistant Welds: minimum # of locations shown, could be more.
Various Weld Reinforcements & Hardware Replacement
Hardware replaced on pf2 clamps
Hardware replaced on pf3 clamps
Pf2 mount
Pf3 mount
Umbrella foot mount
Weld reinforcement required for pf3 mount
Weld reinforcement for umbrella mount (front and back)
Weld reinforcement for (2) dome rib tabs.
NSTXNSTX NSTX Center Stack Upgrade
VV Support Legs: Foot Reinforcement
Epoxy anchor bolted to the floor.
NSTXNSTX NSTX Center Stack Upgrade
VV Support Legs
Modified Existing VV Leg Support
Plates added to side form box beam.
Welds need capacity to match upgrade loads. As-built welds need to match analysis.
Most likely, welds need to be reinforced.
Create cut out to provide clearance for TFOL connecting rod.
Add reinforcing gussets.
NSTXNSTX NSTX Center Stack Upgrade
Pedestal Upgrade
4
Base Plate
Lower Pedestal Section Upper Pedestal Section
Remove and Replace Pedestal
NSTXNSTX NSTX Center Stack Upgrade
Upper Umbrella Lid
6
New Upper Lid (1 water jet part)
For installation, Upper Lid Reinforcement Ring is sectional.
Upper Lid bolts to ring.Welded Reinforcement
Rings and gussets.
NSTXNSTX NSTX Center Stack Upgrade
Lower Umbrella Lid
7
New Lower Lid (sectional & bolted)Lower lid and Pedestal attachment (bolted)
1 water jet part
welded
welded
bolted
NSTXNSTX NSTX Center Stack Upgrade
Umbrella Upgrades
8
Replacement Leg (1 machined part)
Upper & Lower Umbrella Legs removed and replaced (welded).
Replace foot hardware, capture and slide with Inconel parts.
Arch Reinforcement Ring (sectional & welded)
NSTXNSTX NSTX Center Stack Upgrade
New (additional) PF4/5 Supports
Modified Existing PF4/5 Supports
PF4/5 Support
NSTXNSTX NSTX Center Stack Upgrade
Replace Hardware with ASTM A193 B8M Class2 Material
Remove Clevis
Replace Column
Modifications to Existing PF4/5 Support
NSTXNSTX NSTX Center Stack Upgrade
TF Outer Leg Support Upgrades
12
Remove and replace clevis.
Remove and replace existing TFO Leg support turnbuckles.
Remove and replace connecting rods.
welded
Shimmed around existing TFO leg clamp.
NSTXNSTX NSTX Center Stack Upgrade
TF Outer Leg Support Upgrades
13
In718 bushing
In718 rod end housing
Spherical bearing
In718 pipe
TFOL Weldment
TFOL Weldment Joint TFOL Weldment
Clevis (x2)
VV Clevis
NSTXNSTX NSTX Center Stack Upgrade
Additional Parts/Upgrade Components
Additional pf2 clamps
Torque Plate 1 Torque Plate 2
NSTXNSTX NSTX Center Stack Upgrade
Installation Layout
15
Bus Tower
Pedestal
OH Bus
CHI Ring Bus
TF Bus
Upper PF1 Bus
Lower PF1 Bus
NSTXNSTX NSTX Center Stack Upgrade
PF 1a, b, c Bus
17
Support/mount
Clamp
Upper PF1 Bus Runs
Bus Tower
NSTXNSTX NSTX Center Stack Upgrade
OH Coaxial Bus
19
G10 spacer
Support/mount
Water cooled rectangular bus section.
Air cooled Coaxial Bus section.
Connection to OH coil.