Neutronic Analysis of Core Shape and H/D Ratio in Small Molten Salt Fast Reactor 20-50 MWth with 235U as Fisile Material
Dini Suci Lestari (a*), Cici Wulandari (a), Abdul Waris (b), dan Sidik Permana (b)

a) Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, ITB, Bandung

b) Pusat Penelitian Fisika Nuklir dan Biofisika, Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, ITB, Bandung

Abstract

The annual report from the United Nations (UN) which states that in 2019, carbon dioxide emissions related to the world^s energy supply increased to 33.3 Gt, or about 45% from 2000. New source of energy are needed for this reason for which exclude greenhouse gasses as it^s product. Nuclear is the obvious choice as long also contribute to the action to fulfill energy demand that highly increase. But nuclear industry has been sleeping for years because of unfertile market. Many investors would not invest due to large amount of fund and long amount of time are required to build full nuclear power plant which implied to high cost electric energy produced by nuclear. Small Modular Reactor (SMR) would be a great escape plan for nuclear. with Gen IV Molten Saltf Reactor type of SMR, which provide to the idea of producing smaller and more compact yet safe design. It^s also nourish the idea of having a high energy source in the comfort of small geometry. The sizes are varied based on the reactor output power, namely 50MW, 30MW, and 20MW. For 50 MWth output power reactor reach criticality at composition of LiF 85.5% + ThF4 10.5% + 235UF4 4% and reach critical radius of 44.13cm and a ratio of H/D=0.9. For 30 MWth output power reactor, the critical fuel composition is LiF 85.5% + ThF4 10.5% + 235UF4 5%, with a radius of 37.9 cm and a ratio of H/D=0.9. For 20 MWth output power reactor, the critical fuel composition is LiF 89 % + ThF4 8.1% + 235UF4 3.9%, with a radius of 36.9 cm and a ratio of H/D=0.9

Keywords: Geometry, MSFR, H/D, SMR, neutronic.

Topic: Nuclear Science and Engineering