Reactor Core Conceptual Design for a Scalable Heating Experimental Reactor, LUTHER

In this paper, the conceptual design and a preliminary study of LUT Heating Experimental Reactor (LUTHER) for 2 MWth power are presented. Additionally, commercially sized designs 24 120 powers briefly discussed. LUTHER is scalable light-water pressure-channel reactor designed to operate at low temperature, pressure, core density. The utilizes enriched uranium (LEU) produce low-temperature output, targeting district heating demand in Finland. Nuclear needs contribute decarbonizing cooling sector, which much more significant greenhouse gas emitter than electricity production Nordic countries. main principle development simplify safety systems, which, along with using available components, would lead lower fabrication costs enhanced safety. also features unique movable individual fuel assembly reactivity control burnup compensation. Two-dimensional (2D) three-dimensional (3D) assemblies cores modeled Serpent Monte Carlo physics code. Different parameters configurations explored assessed. results show an optimal basic design, good neutronic performance, feasibility controlling by moving assemblies.