13 th - university of california, los angeles · 2016-06-26 ·
TRANSCRIPT
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EVOLVE ConfigurationEVOLVE ConfigurationEVOLVE ConfigurationEVOLVE Configuration
S. Malang, I. Sviatoslovsky, B. Merrill, P. Fogarty
Presented by B. Nelson
13th APEX meeting November 15-17, 2000
SNL, Albuquerque
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• Most effort expended in FY99
• FY-00 work included:– Report figures and new flow schematic provided in FY-00– Tradeoff study of tube/tray/FW configuration
• Primary emphasis on boiling tray design, lessemphasis on transpiration cooled design
Status of configuration studies Status of configuration studies Status of configuration studies Status of configuration studies
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EVOLVE ConfigurationEVOLVE ConfigurationEVOLVE ConfigurationEVOLVE Configuration
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Power– Average neutron wall load: 10 MW/m2
– Average first wall load: 2 MW/m2
Coolant– Li liquid temperature 900 - 1100 C– Li vapor temperature 1200 C– Li pressure <0.5 atm
Materials– FW material Tungsten– Tube, tray, structure material Tungsten– Condensor material, tubes Niobium
Configuration– First Wall Nested tubes, toroidal flow– Blanket / Shield Horizontal trays, vertical flow
EVOLVE Baseline conceptEVOLVE Baseline conceptEVOLVE Baseline conceptEVOLVE Baseline concept
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Outboard plan schematic of moduleOutboard plan schematic of moduleOutboard plan schematic of moduleOutboard plan schematic of module
Note: Some details have changed
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*From FY-99 APEX design report
Inboard Outboard
FW 5 cm 5 cm
Li tray 40 cm 50 cm
Back wall of tray 0.5 cm 0.5 cm
Li vapor manifold 15 cm 20 cm
Manifold backplate 1 cm 1 cm
Clearance 2 cm 2 cm
Secondary blanket 0 cm 40 cm
Clearance 0 cm 2 cm
Shield 60 cm 50 cm
Clearance 2 cm 2 cm
VV front sheet 5 cm 5 cm
VV shielding zone 30 cm 30 cm
VV rear sheet 5 cm 5 cm
Total 165.5 cm 212.5 cm
Recommended radial build*Recommended radial build*Recommended radial build*Recommended radial build*
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Outboard ModuleOutboard ModuleOutboard ModuleOutboard Module
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Flow / Temperature SchematicFlow / Temperature SchematicFlow / Temperature SchematicFlow / Temperature SchematicWith multiple natural convection loops
for passive heat removal
Cycle efficiency 57.7%
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Integrated FW / tray design
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Separated FW / tray design
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FW / tray design
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Sector maintenance conceptSector maintenance conceptSector maintenance conceptSector maintenance concept
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Blanket
Stream FormingNozzles
Plasma X-Point
FirstWall
Blanket
VacuumPump
LiquidLi Stream
Liquid StreamCollectors
Li Supply Lines
Side View Cutaway of Divertor Cassette
Divertor Cassette ConceptDivertor Cassette ConceptDivertor Cassette ConceptDivertor Cassette Concept
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3-D View of Divertor Cassette
Divertor Cassette ConceptDivertor Cassette ConceptDivertor Cassette ConceptDivertor Cassette Concept
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Desirable design featuresDesirable design featuresDesirable design featuresDesirable design features
• Low pressure, low primary stress structure (not includingdisruption loads)
• Nearly uniform temperature structure
• Low velocity lithium liquid (~1 m/s)
• Small leaks may not be fatal to plasma operation
• Small heat exchangers, integral with blanket shield system, allrefractory piping is inside plasma chamber
• Two-pronged maintenance approach:
- High maintenance items are contained in cassettes (diagnostics, divertor, heating systems) - Everything else in sector module is replaced as a unit
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• Vapor formation and motion in magnetic field
• Fabrication of large tungsten structures
• Disruption loads
• Safety, LOCA
Configuration IssuesConfiguration IssuesConfiguration IssuesConfiguration Issues
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PlanPlanPlanPlan
Depending on resource allocations,
• Proceed with second iteration of mechanical design, including CAD models– Tray supply / circulation concept, vapor manifold configuration– Integration of divertor, diagnostic, and midplane maintenance cassettes– Integration of heat exchangers
• Examine fabrication techniques for large tungsten structures
• Assist with development of alternative concepts, or adaptation to otherreactor configurations