Thermal Loads and Cooling Design for ITER in-Port Low Field Side Reflectometer Diagnostic System

Journal Article · 06 March 2019 · Fusion Engineering and Design

DOI: https://doi.org/10.1016/j.fusengdes.2019.02.062 · OSTI ID:1502966

Wang, Wenping  ^[1]; Zolfaghari, Ali ^[1]; Neilson, Hutch ^[1]; Klabacha, Jonathan ^[1]; Khodak, Andrei ^[1]; Basile, Allan ^[1]; Smith, Mark ^[1]; Zhai, Yuhu ^[1]

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1. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

The current design for the ITER Low Field Side Reflectometer (LFSR) diagnostic system contains six circular waveguides that function as both launch and receive antennas. The front end of LFSR system, interfacing with the plasma facing DFW and its supporting diagnostic shielding Modules (DSM), is integrated into Equatorial Port Plug 11(EPP#11). In-vessel LFSR configuration is mainly divided into two sections, i.e. Front Antenna Unit (FAU) and in-vessel Transmission Line (TL) components. During plasma normal operation, the 14 MeV neutrons from D-T fusion reactions penetrate into the port plug and LFSR components. Neutronics code ATTILA is used for assessing the volumetric heating of in-vessel components. The maximum normal heat load due to radiation and the charge exchange from plasma is 0.35 MW/m², which has to be applied on those surfaces affected by a viewing factor consistent with the aperture surface position and orientation. The front antenna unit (FAU) needs the active cooling to handle the radiant and nuclear heating from the plasma. Due to the specific viewing aperture layout at the front-end of in-vessel LFSR, the cooling channel design is challenging. The thermal-hydraulic iterations are performed to achieve the desirable temperature distribution of the water cooled front antenna units. The progressive ratcheting effects of the FAU subjected to cyclic thermal loading are examined by the preliminary non-linear elastic-plastic analysis.

• Research Organization: Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: AC02-09CH11466
• OSTI ID: 1502966
• Alternate ID(s): OSTI ID: 1636678
• Journal Information: Fusion Engineering and Design, Vol. 146; ISSN 0920-3796
• Publisher: ElsevierCopyright Statement
• Country of Publication: United States
• Language: English