It was being developed by the Japanese company International Thorium Energy & Molten-Salt Technology (IThEMS), together with partners from the Czech Republic.
To achieve reasonable neutron economy, the chosen single-salt design results in significantly larger feasible size[clarification needed] than a two-salt reactor (where blanket is separated from core, which involves graphite-tube manufacturing/sealing complications).
Like all molten salt reactors, its core is chemically inert and under low pressure, helping to prevent explosions and toxic releases.
[1] The IThEMS consortium planned to first build a much smaller MiniFUJI 10 MWe reactor of the same design once it had secured an additional $300 million in funding.
[2] IThEMS closed in 2011 after it was unable to secure adequate funding.