The Gas Turbine Modular Helium Reactor (GT-MHR) is a class of nuclear fission power reactor designed that was under development by a group of Russian enterprises (OKBM Afrikantov, Kurchatov Institute, VNIINM and others), an American group headed by General Atomics, French Framatome and Japanese Fuji Electric.
[1] It is a helium cooled, graphite moderated reactor and uses TRISO fuel compacts in a prismatic core design.
Each fuel pin contains a random lattice of TRISO particles dispersed into a graphite matrix.
[3] Commercial light water reactors (LWRs) generally use the Rankine cycle, which is what coal-fired power plants use.
In 2010 General Atomics conceptualized a new reactor that utilizes the power conversion features of the GT-MHR, the Energy Multiplier Module (EM2).