Thermal analyses of the in-vessel frontends of the ITER plasma position reflectometry system

Yohanes Nietiadi, Catarina Vidal, Raul Luís, Paulo Varela

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The ITER Plasma Position Reflectometry (PPR) system will be used to measure the plasma edge density profile at four locations, complementing the magnetic diagnostics. The components studied in this paper are the antennas and 90° bends of two of the PPR reflectometers installed inside the vacuum vessel, which are directly exposed to the plasma and thus subjected to significant thermal loads that may compromise the integrity of the system. The temperature distributions in these components was estimated with steady-state and transient thermal analyses performed with ANSYS Mechanical, following the load specification for the PPR in-vessel components and guidelines for thermal analyses issued by the IO. The results indicate that the maximum operation temperatures will be well above the limit of 450 °C for the selected material (stainless steel 316 L(N)-IG) under neutron irradiation. In face of these results, it is suggested that different materials, such as a nickel-based superalloy, are considered for the manufacturing of these components.

Original languageEnglish
Article number111599
JournalFusion Engineering and Design
Volume156
DOIs
Publication statusPublished - Jul 2020

Keywords

  • ITER
  • Nuclear heat loads
  • Plasma thermal radiation
  • PPR system
  • Temperature distribution

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