Removable samples for ITER - A feasibility and conceptual study

Ph Mertens, O. Neubauer, V. Philipps, S. Ciattaglia, A. Huber, A. Kirschner, M. Knaup, D. Borodin, C. H. Choi, S. Gicquel, T. Hirai, R. Mitteau, R. A. Pitts, S. Sadakov, M. Shimada, E. Veshchev, U. Samm

Research output: Contribution to journalConference articlepeer-review

6 Scopus citations

Abstract

The control of the radioactive inventory in the vacuum vessel of ITER is a main safety issue. Erosion of activated plasma-facing components (PFC) and co-deposition of tritiated dust on PFC and in areas below the divertor constitute the main sources of in-vessel radioactive inventory mobilizable in the case of an accident and also during venting of the vessel. To trace the dust and tritium inventory in the machine, the use of collectors in the form of removable samples was evaluated, beside other techniques, since it provides a reliable way to follow the history of the deposits and check critical areas. Four types of removable probes and two optional active diagnostics were selected out of about 30 different options. For all four probes, a conceptual design was worked out and the feasibility was checked with preliminary estimations of thermal and electromagnetic loads, as well as remote handling paths. The highest temperature estimated for the front face of all probes lies in the range 300-500 °C, which is tolerable. Installed in representative places, such removable samples may provide information about the dust and tritium distribution inside the vacuum vessel.

Original languageEnglish
Article number014004
JournalPhysica Scripta
VolumeT159
DOIs
StatePublished - 2014
Externally publishedYes
Event14th International Conference on Plasma-Facing Materials and Components for Fusion Applications, PFMC 2013 - Julich, Germany
Duration: 13 May 201317 May 2013

Keywords

  • ITER
  • diagnostics
  • dust
  • instrumentation
  • removable samples
  • tritium inventory

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