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Task force on Deterministic REactor Modelling at Chalmers University of Technology (DREAM)

Start date 01/01/2013
The deterministic modelling of nuclear reactors requires special techniques due to the multi-physics and multi-scale aspects of such systems. The multi-physics aspects come primarily from the macroscopic cross-sections being dependent on the temperature of the coolant/moderator and of the fuel and on the energy being produced by fission reactions. Consequently, the determination of all fields needs to be carried out simultaneously if one wants to determine the behaviour of nuclear systems. The other characteristic feature of nuclear reactors is their multi-scale aspects, i.e. phenomena occurring at different scales. The multi-scale character is explained by the fact that nuclear reactors are strongly heterogeneous systems, and by the fact that phenomena involving different characteristic lengths play role in the system.

The research being carried out at Chalmers is devoted to the modelling of nuclear reactors (more specifically the nuclear core), and focuses on the development of new computational methods for treating the multi-scale and multi-physics aspects of nuclear systems. This will ultimately allow a more reliable assessment of the performance, reliability, and safety of the current fleet of nuclear reactors, as well as of the units planned for near-term deployment. Gen-IV systems would also benefit from such a research program, with the development of an innovative and reliable computational route for the nuclear systems of tomorrow.

The research encompasses several disciplines, ranging from neutron transport, fluid dynamics, heat transfer, to reactor dynamics and transients. This group is the only group in Sweden dealing with the deterministic modelling of nuclear reactors in an integrated viewpoint (i.e. tackling the multi-physics and multi-scale aspects simultaneously).

Experts from the Swedish nuclear industry and safety authorities are closely following some of the projects being performed.
 

Illustration of the multi-physics nature of nuclear reactor cores, where neutron transport, fluid dynamics, and heat transfer ne
Illustration of the multi-physics nature of nuclear reactor cores, where neutron transport, fluid dynamics, and heat transfer need to be simultaneously modelled

Project leaders

 Christophe_Demaziere_2019_2.jpg
Professor Christophe Demazière


Associate Professor Paolo Vinai 

On-going projects
CORTEX – CORe monitoring techniques and EXperimental validation and demonstration – European Commission support

Development of a hybrid neutron transport framework for static and dynamic calculations and applications to fast reactor cores
https://research.chalmers.se/en/project/9223

ESFR-SMART – European Sodium Fast Reactor Safety Measures Assessment and Research Tools – European Commission support

SEALION – Seaborg External multiphysics Architecture for Licensing and Ip development Of Nuclear reactors – VINNOVA support

Study of core stability during load follow with ROM methods
https://research.chalmers.se/en/project/?id=9607​

Publications

Book on Modelling of Nuclear Reactor Multi-physics - From Local Balance Equations to Macroscopic Models in Neutronics and Thermal-Hydraulics

Past collaborators:

Sebastian Gonzalez-Pintor Post-Doc, Subatomic and Plasma Physics, Department of Physics

Victor Dykin Researcher, Subatomic and Plasma Physics, Department of Physics

Manuel Calleja Post-Doc, Subatomic and Plasma Physics, Department of Physics

Amalia Chambon PhD student, Subatomic and Plasma Physics, Department of Physics

Klas Jareteg PhD Student, Subatomic and Plasma Physics, Department of Physics

Alberto Ghione PhD Student, Subatomic and Plasma Physics, Department of Physics

Lars Davidson Full Professor, Head of Division Fluid Dynamics

Srdjan Sasic Professor, Chalmers University of Technology

Henrik Ström Senior researcher, Chalmers University of Technology

Mohammad Asadzadeh Full Professor, Chalmers University of Technology

Antoni Vidal-Ferrándiz Post-Doc, Universitat Politecnica de Valencia

Nicolas Olmo-Juan PhD student, Universitat Politecnica de Valencia

Eirik Eide Pettersen BSc student, Danish Technical University

Anders Ålund Fraunhofer-Chalmers Centre

Fredrik Edelvik, Associate professor, Fraunhofer-Chalmers Centre

The Swedish Research Council (Vetenskapsrådet - VR)
The Swedish Centre for Nuclear Technology (Svenskt kärntekniskt centrum - SKC)
The Swedish Radiation Safety Authority (Strålsäkerhetsmyndigheten - SSM)
The European Commission
Sweden’s innovation agency (VINNOVA)

Past funding bodies:
The Nordic Thermal-Hydraulic Network (NORTHNET)

Published: Fri 06 Nov 2020.