Study of shielding options for lower ports for mitigation of neutron environment and shutdown dose inside the ITER cryostat

Raul Pampin, Alejandro Suarez, Anne Arnould, Natalia Casal, Rafael Juarez, Alex Martin, Fabio Moro, Fernando Mota, Eduard Polunovskiy, Flavien Sabourin

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Mitigation of the neutron environment inside the cryostat, and of the subsequent decay gamma dose field from activated materials, is necessary in order to reduce heating of coils and occupational exposure, thereby facilitating smooth operation and maintenance of ITER. Several lines of action are currently being explored to mitigate crucial contributions, such as the leakage through the lower ports. Results are presented here for the two types of lower ports in ITER: cryopump ports and remote-handling ports. Different shielding configurations and material options are investigated and compared in terms of neutron attenuation, coil heating and shutdown dose rate reduction, whilst also considering other engineering constraints such as weight or pumping power. Results enable informed decision-making of best compromise solutions for subsequent design and integration.
Original languageEnglish
Pages (from-to)1408 - 1411
Number of pages4
JournalFusion Engineering and Design
Volume109-111
DOIs
Publication statusPublished - 2016
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Nuclear Energy and Engineering
  • Materials Science(all)
  • Mechanical Engineering

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