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This document outlines the details of the NSTX (National Spherical Torus Experiment) upgrade, focusing on structural integrity, alignment data, and installation aspects as of April 14, 2010. It covers the installation locations, measurement accuracy, and alignment of PF5 structures. The analysis includes an overview of support rings, insulation, and spring systems under various loads, assessing deflections and stress concentrations. The report emphasizes ongoing efforts to enhance thermal performance and material optimization in the vessel's assembly, ensuring a robust and effective upgrade for the NSTX project.
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NSTX Supported by Coils Support Structures College W&M Colorado Sch Mines Columbia U CompX General Atomics INEL Johns Hopkins U LANL LLNL Lodestar MIT Nova Photonics New York U Old Dominion U ORNL PPPL PSI Princeton U Purdue U SNL Think Tank, Inc. UC Davis UC Irvine UCLA UCSD U Colorado U Illinois U Maryland U Rochester U Washington U Wisconsin Danny Mangra Culham Sci Ctr U St. Andrews York U Chubu U Fukui U Hiroshima U Hyogo U Kyoto U Kyushu U Kyushu Tokai U NIFS Niigata U U Tokyo JAEA Hebrew U Ioffe Inst RRC Kurchatov Inst TRINITI KBSI KAIST POSTECH ASIPP ENEA, Frascati CEA, Cadarache IPP, Jülich IPP, Garching ASCR, Czech Rep U Quebec NSTX Upgrade Structural upgrade 14 april 2010
Alignment Data PF5( A&B and U&L) Installed location Current Location Measurement accuracy
Alignment PF5 Lines- original location, dash lines-lower Symbols- current location
PF4/5 support 6 new columns 6 Old locations at vessel VEM interface to clamp
TF Support Rings Springs
Tf-Links 4” OD Tube x .25” thk Insulation Springs @10,000 LBF/ins
Preliminary Analysis-no radius rod envelope load • No Radius rod, • Similar behaviour at K = 19.85 KlbF/ins from Han’s chart • Deflection ~ .35”, Max von mises ~ 50 Ksi at Al to cu interface
Preliminary Analysis- radius rod @12,000 lbf/ins Deflection ~ .31”, Max Von Mises ~ 36 Ksi
Overall status • Ongoing to mature PDR Radius rod spring ~ 10,000 Lbs/ins PF4/5 radius support-thermal issues Interface to center stack, lids, spokes • Refinement from matured PDR-others material optimization stress and stress concentration weight Fabrication Installation