FAST: Generation-IV nuclear reactors with a fast neutron spectrum

We launched the project in 2002 and our current goals are
  • to study neutronics, thermal hydraulics and fuel behaviour of advanced fast reactors;
  • to evaluate safety of fast reactors considered for construction in Europe;
  • to study different design solutions for Generation-IV Molten Salt Reactor;
  • to represent Switzerland internationally;
  • to educate young researchers and students.


May 21, 2014

ICAPP15: International Congress on Advances in Nuclear Power Plants "Nuclear Innovations for a Low-carbon Future" took place on May 3-6, 2015 in Nice, France. We contributed to 9 papers presented at the conference, 6 of them related to Sodium-cooled Fast Reactor and 3 -- to Molten Salt Reactor.


April 1, 2015

The August issue of Progress in Nuclear Energy publishes a paper on "A Geometric Multiscale modelling approach to the analysis of MSR plant dynamics" by Matteo Zanetti, Antonio Cammi, Carlo Fiorina, and Lelio Luzzi:


March 12, 2015

The four-year project "A Paradigm Shift in Reactor Safety with the Molten Salt Fast Reactor" (SAMOFAR) with 11 international partners including PSI was submitted in response to the first call for proposal of the Horizon 2020 program. The proposal was highly evaluated and granted by Euratom. The Swiss State Secretariat for Education, Research and Innovation is co-financing the participation of PSI. The FAST group contributes with the neutronics and transient analysis.


March 12, 2015

The very first issue of the ASME's Journal of Nuclear Engineering and Radiation Science publishes "Parametric Lattice Study of a Graphite-Moderated Molten Salt Reactor" by Boris Hombourger, Jiri Krepel, Konstantin Mikityuk and Andreas Pautz. The paper summarizes selected first results of the PhD study on small modular molten-salt reactor:


February 25, 2015

Matteo Zanetti, PhD student from Politecnico di Milano joins us for three-month internship to complete the work on development and implementation of the delayed neutron precursors transport in a molten salt reactor. This is the second attachment of Matteo to our group, the first one was in 2013.


February 23, 2015

Alzbeta Bednarova, MS student from Czech Technical University in Prague, joins us for six months to make her master thesis on modeling of Superphenix fast reactor core using the FAST code system. The study is supported by the PSI grant for the summer student.


December 1, 2014

Evzen Losa, PhD student from Czech Technical University in Prague, joins us for nine months to work on 3D modeling of closed equilibrium fuel cycle in advanced fast reactors as well as in VVER, using our calculational tools. The study is supported by the IAEA Fellowship. This is already the second attachment of Evzen, the first one was in 2012.


November 24, 2014

Thanks to Chinese colleagues who attached audio to their paper on sodium boiling tests published in Experimental Thermal and Fluid Science ( we can listen to the sound of the sodium boiling: audio(mp3).

More news in News Archive.

General Contact

Project Leader
Dr. Konstantin Mikityuk
Paul Scherrer Institute
5232 Villigen PSI
+41 56 310 2385

LRS Secretary
R. Ringele
+41 56 310 2592

LRS web page

Laboratory for Reactor Physics and Systems Behaviour