NSTX NSTX LidsJuly 6, 2010 1 NSTX Supported by College WM Colorado Sch Mines Columbia U CompX...
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NSTX NSTX NSTX Lids July 6, 2010 1 NSTX NSTX Supported by 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 NSTX Upgrade Structural upgrade Lids assembly 6 Coils Support Structures 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 Danny Mangra
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NSTX NSTX LidsJuly 6, 2010 Plate.5” thick.5” thick plate ~700 lbs lbs per teeth Max stress >50,000 psi
Transcript of NSTX NSTX LidsJuly 6, 2010 1 NSTX Supported by College WM Colorado Sch Mines Columbia U CompX...
NSTXNSTX NSTX Lids July 6, 2010 1
NSTXNSTX Supported by
College W&MColorado Sch MinesColumbia UCompXGeneral AtomicsINELJohns Hopkins ULANLLLNLLodestarMITNova PhotonicsNew York UOld Dominion UORNLPPPLPSIPrinceton UPurdue USNLThink Tank, Inc.UC DavisUC IrvineUCLAUCSDU ColoradoU IllinoisU MarylandU RochesterU WashingtonU Wisconsin
NSTX UpgradeStructural upgrade
Lids assembly6
Coils Support Structures Culham Sci CtrU St. Andrews
York UChubu UFukui U
Hiroshima UHyogo UKyoto U
Kyushu UKyushu Tokai U
NIFSNiigata UU Tokyo
JAEAHebrew UIoffe Inst
RRC Kurchatov InstTRINITI
KBSIKAIST
POSTECHASIPP
ENEA, FrascatiCEA, Cadarache
IPP, JülichIPP, Garching
ASCR, Czech RepU Quebec
Danny Mangra
NSTXNSTX NSTX Lids July 6, 2010
Outer TF free-body-out of plane loads
• Applied forces: 23,000 or 28,000 or 41,000 lbs
• Reactions at aluminum blocks has moments or more equivalent reaction forces
• Similar free body is need for inner stack to lids interface
• 9000 lbs per bolt(36 total) is used
• Actual stress is larger due to in plane loads eg launch
NSTXNSTX NSTX Lids July 6, 2010
Plate .5” thick
• .5” thick plate ~700 lbs• 36000 lbs per teeth• Max stress >50,000 psi
NSTXNSTX NSTX Lids July 6, 2010
.5” lid
• Max deflection ~ .025”
NSTXNSTX NSTX Lids July 6, 2010
Inner g10 crown/ strength 38,000 psi cross
• Inner g10 crown• 18000 lbs per tooth• Max stress> 24000 psi• Design limit < 19000 psi• .25” Radius
NSTXNSTX NSTX Lids July 6, 2010
G10 inner crown deflection
• Max deflection ~ .026”
• Actual max flection is much larger
• 100” copper stem
NSTXNSTX NSTX Lids July 6, 2010
Crown to lid interface-teeth details
• Crown teeth need shaping
• Eg of standard teeth• involute
•Current design•Stress in g10> 30,000 psi•Multiplications from shaping•Or crushing of teeth
NSTXNSTX NSTX Lids July 6, 2010
Center stack thermal growth 9 mm
• .5” thk plate• Fixed at outer boundary
NSTXNSTX NSTX Lids July 6, 2010
Thermal growth 9 mm
• .5” thk• Max stress >
45000 psi• Add to torsional
stress
NSTXNSTX NSTX Lids July 6, 2010
Lower crown/inconel 5/8 ~ 16,000 lbs in shear or 27,000 lbs tension
• 18,000 lbs in shear per bolt
• 1000 lbs per bolt launch load
• Halo current 2000 lbs per bolt in shear
•18 x 5/8 bolt ~.3 sq in•18000 lbs in shear•Inconel allowable 90,000 psi in tension or ~54,000 psi in shear•Bolt ~ 60,000 psi in shear + bending etc•G10 bearing pressure
NSTXNSTX NSTX Lids July 6, 2010
Summary/using Pete’s force
• Current g11 /teeth design need much work in upper crown• Lower crown~18 bolts design negative margin• Insulation material need a strength ration>60,000 psi• .5” thk plate need work at teeth area• Torsion stress + thermal stress > 75000 psi with current
concept• Basically lots of increase scope to design
– G10 interface/teeth design to lid– Sst interface– Thermal concept– Crown to pedestal need work, 18 bolts need resizing
NSTXNSTX NSTX Lids July 6, 2010
Design
• Single crown radius of g10 teethremove tension between buss/flag
• Double crownremove margin from flex strap boltor add more insertremovable but no slippage
