Title: Xe and Kr extraction for Th-U sustainable ICMSR fuel

Authors: Iza Shafera Hardiyanti; A. Suparmi; Andang Widi Harto

Addresses: Physics Department, Faculty of Mathematics and Natural Sciences, Sebelas Maret University, Surakarta, Indonesia ' Physics Department, Faculty of Mathematics and Natural Sciences, Sebelas Maret University, Surakarta, Indonesia ' Nuclear Engineering and Engineering Physics Department, Faculty of Engineering, Universitas Gadjah Mada, Yogyakarta, Indonesia

Abstract: Innovative Compact Molten Salt Reactor (ICMSR) is a nuclear reactor designed to utilise thorium as main fertile fuel to achieve sustainable fuel resources. ICMSR has the inherent safety required as Advanced Reactor. This reactor uses liquid fuel salt. The fuel contains NaF-ThF₄-UF₄ (75-19.4-5.6)% mole of fuel salt with 19.75% uranium-235 enrichment. ICMSR uses graphite as moderator, Hastelloy-N as reactor vessel and NaF-KF (50-50)% mole as intermediate coolant. Fission yields produced by ICMSR include Xe and Kr. These isotopes need to be removed from the reactor because it reduces fuel utilisation. This paper describes the effect of Xe and Kr isotopes extraction to the criticality of ICMSR. Calculation is done by using MCNP6. The results show that the extraction of Xe and Kr on ICMSR increased the criticality and produced 2.661 × 10⁸ Ci actinide fission products.

Keywords: ICMSR fuel; thorium sustainable fuel; Xe and Kr extraction; criticality; fission yield.

DOI: 10.1504/IJNEST.2023.132656

International Journal of Nuclear Energy Science and Technology, 2023 Vol.16 No.2, pp.108 - 120

Received: 26 Nov 2021
Received in revised form: 11 Apr 2022
Accepted: 02 May 2022
Published online: 07 Aug 2023 *