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

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

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

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

Non-Uniformity of Velocity

FW Panel in the Removal Position

Interference region

Panel Ready for Removal

Installed

Rotation ~10 deg.

Vertical Displacement

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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