Plasma and Fusion Research

Volume 14, 3405082 (2019)

Regular Articles

Neutronics Assessment for the Thailand Tokamak Upgrade
Siriyaporn SANGAROON, Jiraporn PROMPING1), Apiwat WISITSORASAK2), Boonyarit CHATTHONG3), Ponkris KLAYWITTAPHAT4), Roppon PICHA1) and Thawatchai ONJUN1)
Department of Physics, Mahasarakham University, Mahasarakham, Thailand
1)
Thailand Institute of Nuclear Technology (Public Organization), Bangkok, Thailand
2)
Department of Physics, King Mongkut University of Technology Thonburi, Bangkok, Thailand
3)
Department of Physics, Prince of Songkla University, Hat Yai, Songkhla, Thailand
4)
Faculty of engineering, Thaksin University, Phatthalung Campus, Phatthalung, Thailand
(Received 27 December 2018 / Accepted 15 March 2019 / Published 25 April 2019)

Abstract

Shielding configuration studies for the fusion plasma experiment of the Thailand tokamak upgrade are presented in this work. The neutron rate of 1014 n/s of DT fusion is determined to assess the next step operation in phase II of the Thailand tokamak upgrade in the future. In order to optimize the materials and dimensions of the shielding, a series of MCNP simulation was performed to assess the neutron streaming in order to enhance understanding of neutron and gamma transport in the plasma torus, hall and the pathways shielding. Effect of three commonly available concrete composition (ordinary concrete, barite concrete and boron frits-baryte concrete) have been investigated as a torus wall shielding and entrance maze. Four orders of magnitude of fast neutron flux reduction was observed at outside torus hall. The thermal neutron was significantly reduced using the labyrinth structure. The conceptual design of the biological radiation shielding is assessed and presented. This study provides support for the future neutron and gamma radiation safety at the Thailand tokamak upgrade facility.

Keywords

Thailand tokamak, shielding, neutron, MCNP

DOI: 10.1585/pfr.14.3405082

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