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SOL Vacuum Vessel FS Shield Gap Thickness (cm) FW Gap + Th. Insulator Winding Pack Plasma 4.8 2 ≥ 231 2.2 28  ≥ 149 cm | | Coil Case & Insulator Blanket.

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Presentation on theme: "SOL Vacuum Vessel FS Shield Gap Thickness (cm) FW Gap + Th. Insulator Winding Pack Plasma 4.8 2 ≥ 231 2.2 28  ≥ 149 cm | | Coil Case & Insulator Blanket."— Presentation transcript:

1 SOL Vacuum Vessel FS Shield Gap Thickness (cm) FW Gap + Th. Insulator Winding Pack Plasma 4.8 2 ≥ 231 2.2 28  ≥ 149 cm | | Coil Case & Insulator Blanket (LiPb/FS/He) 47 Back Wall 9 1 Gap External Structure 18 ARIES-CS LOCA Thermal Analysis Carl Martin and Jake Blanchard University of Wisconsin LiPb/FS/He Radial Build (Water Cooled Internal VV)

2 Permutations Questions: –Which coolants are lost? –Which are present, but static? –Which are flowing naturally? –Which still have forced flow? –Does plasma stay on?

3 FE Model and Boundary Conditions for Thermal Analysis BlanketShieldVacuum Vessel First Wall T init = 500 C LiPB T init = 625 C Back Wall T init = 450 C Shield T init = 450 C Vacuum Vessel T init = 100 C Gap Radius = 2.0 m Adiabatic boundary at back of vacuum vessel Model is axisymmetric about plasma centerline and symmetric on sides Assumed there is no helium or water in channels Ferretic Steel Boronated Ferretic Steel LiPb

4 Transient Temperature Response Without Heat Removal Seven Day ResponseThirty Day Response Note that LiPb afterheat is underestimated!

5 Transient Temperatures Without Heat Removal After 1 Hour After 1 Day Note that LiPb afterheat is underestimated!

6 Transient Temperatures Without Heat Removal After 1 Week After 1 Month

7 Analysis with Natural Convection to Water in Vacuum Vessel BlanketShieldVacuum Vessel First Wall T init = 500 C LiPB T init = 625 C Back Wall T init = 450 C Shield T init = 450 C Vacuum Vessel T init = 100 C Gap Radius = 2.0 m Natural convection to water in vacuum vessel included in model Heat transfer coefficient of 500 W/m 2 -C to 100 C water assumed Emissivity of 0.1 assumed in vacuum gaps Ferretic Steel Boronated Ferretic Steel LiPb water

8 Transient Temperature Response with Natural Convection in Vacuum Vessel Seven Day Response Note that LiPb afterheat is underestimated!

9 Side By Side Comparison Without VV CoolingWith VV Cooling Note that LiPb afterheat is underestimated!

10 Sensitivity of Maximum Temperature to Gap Surface Emissivity

11 Repeat without LiPB in Channels BlanketShieldVacuum Vessel First Wall T init = 500 C Back Wall T init = 450 C Shield T init = 450 C Vacuum Vessel T init = 100 C Gap Radius = 2.0 m Ferritic Steel Boronated Ferritic Steel SiC liner

12 Transient Temperature Response Without Heat Removal

13 SiC liner Analysis with Natural Convection to Water in Vacuum Vessel BlanketShieldVacuum Vessel First Wall T init = 500 C Back Wall T init = 450 C Shield T init = 450 C Vacuum Vessel T init = 100 C Gap Radius = 2.0 m Natural convection to water in vacuum vessel included in model Heat transfer coefficient of 500 W/m 2 -C to 100 C water assumed Emissivity of 0.1 assumed in vacuum gaps and channel passages Ferritic Steel Boronated Ferritic Steel water

14 Transient Temperature Response with Natural Convection in Vacuum Vessel

15 Sensitivity of Maximum Temperature to Surface Emissivity

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