A4 Conference proceedings

Reactor core conceptual design for a scalable heating experimental reactor, LUTHER

Open Access publication

Publication Details

Authors: Truong Thinh, Suikkanen Heikki, Hyvärinen Juhani

Publication year: 2021

Language: English

Related journal or series: Journal of Nuclear Engineering

Title of parent publication: International Conference on Physics of Reactors 2020 (PHYSOR2020)

Volume number: 2

Issue number: 2

Start page: 207

End page: 214

Number of pages: 8

eISBN: 978-1-5272-6447-2

eISSN: 2673-4362

JUFO level of this publication: 1

Digital Object Identifier (DOI): http://dx.doi.org/10.3390/jne2020019

Permanent website address: https://www.mdpi.com/2673-4362/2/2/19

Open Access: Open Access publication

Location of the parallel saved publication: http://urn.fi/URN:NBN:fi-fe2021060834679


In this paper, the conceptual design and a preliminary study of LUT Heating Experimental Reactor (LUTHER) for a 2 MWth power are presented. Additionally, commercially sized designs for 24 MWth and 120 MWth powers are briefly discussed. LUTHER is a scalable light-water pressure-channel reactor designed to operate at low temperature, low pressure, and low core power density. The LUTHER core utilizes low enriched uranium (LEU) to produce low-temperature output, targeting the district heating demand in Finland. Nuclear power needs to contribute to the decarbonizing of the heating and cooling sector, which is much a more significant greenhouse gas emitter than electricity production in the Nordic countries.

The main principle in the development of LUTHER is to simplify core design and safety systems, which, along with using commercially available reactor components, would lead to lower fabrication costs and enhanced safety. LUTHER also features a unique design with movable individual fuel assembly for reactivity control and burnup compensation.

2-dimensional (2D) and 3-dimensional (3D) fuel assemblies and reactor cores are modeled with the Serpent Monte Carlo reactor physics code. Different reactor design parameters and safety configurations are explored and assessed. Preliminary results show an optimal basic core design, a good neutronic performance, and feasibility of controlling reactivity by moving fuel assemblies.

LUT Focus Areas

Last updated on 2021-08-06 at 08:01