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First Wall and Shield Activities
M. UlricksonPresented at the FNST Meeting
UCLAAugust 18, 2009
Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company,for the United States Department of Energy’s National Nuclear Security Administrationunder contract DE-AC04-94AL85000.
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Outline
• Scope of US contribution• The Blanket Integrated Project Team• Recent Design Progress• Issues• Future Work
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SCOPE OF THE SANDIACONTRIBUTION
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International Thermonuclear Experimental Reactor (ITER)
Central Solenoid
Outer Inter-coil Structure
Toroidal Field Coil
Poloidal Field Coil
Machine Gravity Support
Blanket Module 20%
Vacuum Vessel
Cryostat
Port Plug
(IC Heating)
Divertor
Torus Cryopumping
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Additional Scope and Options
• There is a possibility that the US will contribute the first wall on the equatorial ports for diagnostics (6 ports) in place of our initial Port Limiter contribution.
• The baseline US contribution is for modules 7 (near the top), 12 and 13 (above the equatorial port)
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BLANKET INTEGRATED PRODUCT TEAM
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Blanket Integrated Product Team
• Both the DA’s and the ITER Organization recognized that sharing the blanket/first wall procurement among six parties would be very complex and make quality control more difficult.
• In addition the IO recognized that the design could not be completed solely at the IO.
• A “build to print” procurement arrangement was not going to succeed.
• Guenter Janeschitz proposed forming teams to share the design among the IO and the DA’s and a discussion of redivision of the scope of the parties contributions to reduce the number of DA’s fabricating similar parts.
• The BIPT was formed in the Fall of 2008 with the intent of achieving these objectives.
• Doug Loesser (PPPL) is the BIPT leader.
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Procurement Sharing Baseline
• First WallEU 40%US 20%RF 20%JA 10%CN 10%Design by IO for all
• Shield ModulesCN 40%US 20%RF 20%EU 10%KO 10%
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BIPT Scope Revisions (draft)
• First WallEU 50%RF 40%CN 10%US design of all
• Shield ModulesCN 40-50%KO 30-25%RF 30-25%RF design of all
• This agreement was not ratified at the July meeting and further changes are almost certain.
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RECENT DESIGN PROGRESS
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Latest Concept for First Wall
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Latest Concept for Shield Module
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Design by Analysis ProcessCATIA
Concept
Neutron Transport (MCNP)
Simplify for
Analysis
Electromagnetic Analysis (OPERA)
Fluid Flow & Heat
Transfer Analysis
Primary Stress (ABAQUS)
Secondary Stress
Meet Require-ments
Refine ConceptNo
Yes Done
FW Surface Heat
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Design Tools
• ModelingCATIA to match IO; SMARTEAM to interface with ENOVIA
• Neutron TransportMCNP; University of Wisconsin
• Thermal HydraulicsCFDesign; good CATIA interface but no 2 phaseSCTetra; good transient analysis but no 2 phase, UCLAFLUENT; Some 2 phase STAR-CCM; Full capability
• ElectromagneticOPERA; Experience, full 3D, ferromagnetic, full V&V
• Mechanical and stressABAQUS; Sandia site license
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CFD Analysis for BM04 (US fixed)
CFD model total nuclear heat to BM04 = 0.40473 MW
Water= 0.0494 MW
Steel = 0.35531MW
CFD water outlettemperature= 112.01C
(Inlet T= 100 C; inlet mass flow rate = 8 kg/s)
Steady State Analysis Water volume = 0.0284942 m3
Steel volume= 0.254979 m3
∆P = 148864 Pa
UCLA
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Non-Uniformity of Velocity
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FW Panel in the Removal Position
Interference region
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Panel Ready for Removal
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Installed
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Rotation ~10 deg.
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Vertical Displacement
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Issues
• New concepts from the IO have relatively little analysis and are created mostly by intuition.
• The new concepts tend to appear much more rapidly than the analysis can be done.
• This breaks the design by analysis logic and actually slows the design process. People like what they have “designed” and don’t want problems to be found.
• Technical issuesFW can’t be removed from the shield unless slots are
increased.Flow is not uniform in the shield or first wall. (hot spots)Cooling pattern has low water volume fraction (~13%)Many fewer EM slits because of preferences.
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Future Work
• Option 1We design modules 7, 12, 13 and fabricate sameMust make another FWQM and test at SNLSmaller design scope and larger manufacturing, prototype,
heat sink R&D, and Be to Cu R&D budget• Option 2
We design all first wall panelsWe perform basic heat sink R&D and Be to 316 SS joining
R&DWe design and fabricate the first wall for the equatorial
diagnostic ports.
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