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ITPA12 Diagnostics - PPPL - 3/26-30/07 1 US ITER Project Plans David Johnson Diagnostics Team Leader March 26, 2007 ITPA12 Design Basis US Scope Port Plugs and Integration Assessment Studies Schedule/Milestones
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ITPA12 Diagnostics - PPPL - 3/26-30/07 2 Scope Definition DWG Agreement Forms Basis for Sharing 2004 DWG Sharing Agreement is basis for defining US diagnostic share at 16% – Features ‘port-based’ repackaging - different arrangement of diagnostics from 2001 – Also places responsibility for integration of diagnostics with plug providers – Revision underway to accommodate India -- Not yet fully endorsed When compared with 2001 Basis for determining ITER ‘credit’, some scope ambiguity exists, e.g. – DWG added scope for MSE (2 vs 1 view) and for plug integration relative to 2001 Design – US scope/credit may change to accommodate India New procurement arrangements, incorporating ‘port-based packaging’ need to be negotiated to remove ambiguity. USIPO will not be able to place large design contracts until ambiguities are better resolved.
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ITPA12 Diagnostics - PPPL - 3/26-30/07 3 US Diagnostic Packages
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ITPA12 Diagnostics - PPPL - 3/26-30/07 4 Diagnostic Front-End Integration Design constraints – Intermingling of numerous labyrinths, many with precision optics – Provide access while limiting neutron streaming – Provide attachments and cooling to blanket shield modules Plug E3 is a US responsibility (DWG Sharing Agreement) – Many other diagnostics need to be integrated into plug E3 > 2 visible/IR camera views(EU) 2 edge CXRS views (RF) 2 H arrays (RF) X-ray crystal views (possible)(??) The division of integration design responsibility between the IT and the parties has not been fully negotiated.
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ITPA12 Diagnostics - PPPL - 3/26-30/07 5 Development of Radial Diagnostic Cassettes Radial cassettes may make integration and testing easier. May also make maintenance easier.
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ITPA12 Diagnostics - PPPL - 3/26-30/07 6 Central Tube Development for Upper Ports Metal seal, removable back plate gives access to central tubes. Back plate has only windows. “Hard” feedthrus on side panels
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ITPA12 Diagnostics - PPPL - 3/26-30/07 7 Developing Neutronics Capability with ATILLA ATILLA, a discrete-ordinates, radiation transport code produced by Transpire, Inc., is being benchmarked for use on ITER. In the US, this work is a joint PPPL/UCLA effort well connected to IO and EU efforts. (See Talk by R. Feder later today) Potentially essential tool for qualifying diagnostic labyrinth designs. Tetrahedral Mesh - 496k Cells
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ITPA12 Diagnostics - PPPL - 3/26-30/07 8 Assessment Studies For the US instrument development, near-term priorities were presented to the community and widely distributed last Spring. Priorities stressed better definition of instrument front-end configurations, performance assessments, consideration of alternate approaches and tool development. ~ 40 discussions with experts concerning these priority issues and relevant capabilities were documented. Awards for a total of 14 studies (including 2 cost studies) were made in summer and fall. Results will be presented at this meeting. All studies are completed or nearing completion 75% of reports have been submitted. Final reports will be placed on ITER IDM system.
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ITPA12 Diagnostics - PPPL - 3/26-30/07 9 Assessment Studies
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ITPA12 Diagnostics - PPPL - 3/26-30/07 10 Next Round of Studies Large procurements to design and fabricate US ITER diagnostics will begin in FY08. To advance front-end design and integration, there will be a second round of studies, beginning this Summer. Plan discussions over the next month regarding new design tasks and potential R&D areas. – These will be documented as before in ‘Records of Discussion’. As designs become better defined, also plan to fund costing studies to improve confidence as Project Cost Baseline is established.
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ITPA12 Diagnostics - PPPL - 3/26-30/07 11 Schedule/Milestones A prerequisite for major diagnostic design effort is the renegotiation of new procurement arrangements to resolve existing scope ambiguities and clarify stakeholder roles. Definition of mutually agreeable integration of front-end components within the plugs will facilitate many parallel detailed design efforts. FY2014 delivery of qualified port plugs is consistent with top level IO schedule – Detailed plan will likely feature plug delivery phased over a multi-year period.
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