We specialize in R&D activities for nuclear reactors, new-generation nuclear reactors (Gen IV), and recently also for small nuclear reactors. We develop our activities in line with the needs of energy development in the Czech Republic.
Research on the new generation reactors in ÚJV Řež currently focuses on the preparatory phase of the ALLEGRO project, i.e. a demonstrator of a helium-cooled high-temperature fast reactor (GFR - Gas Fast Reactor).
The Nuclear Safety and Reliability Division also works on research of small nuclear reactors and the possibilities of their use in the Czech energy sector, with emphasis on central heat supply.
The research of new generation reactors at ÚJV Řež is currently focused on the development of the concept of the demonstrative high-temperature reactor ALLEGRO with a fast spectrum of neutrons cooled by helium (GFR - Gas Fast Reactor) within the international association "V4G4 Center of Excellence".
In the context of this project, we develop activities in the following areas:
We assess existing Generation IV. reactor concepts, we propose new concepts, including detailed technical solutions. We perform thermohydraulic calculations of primary circuit behavior in operational and emergency conditions, we analyze the course and consequences of a severe accident with the core melting, we solve problems of using PSA methods in the evaluation of these reactors.
We provide expert support for helium technology including the design of experimental devices for verification and validattion of computational tools and for verifying operating modes and technology systems.
In parallel with the above mentioned technical activities, we analyze the legislative and economic aspects of the application of Generation IV. reactors in the Czech Republic.
We are preparing several follow-up research activities in the following areas:
Recently, small nuclear reactors with a power output of up to 300 MWe and their application to provide energy supplies are of interest in the world.
The development and deployment of small reactors is supported by the International Atomic Energy Agency (IAEA) for use in countries with poorly developed electricity production. Industrialized countries are developing small nuclear reactors in particular as an ecological and sustainable alternative to fossil fuel and gas fired plants.
Research at ÚJV Řež focuses on small-scale nuclear reactors of the pressurized type, heavy-metal fast reactors and, and also gas-cooled high-temperature reactors.