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.


July 29, 2014

The paper "Thermal-hydraulics of internally heated molten salts and application to the Molten Salt Fast Reactor" by C. Fiorina, A. Cammi, L. Luzzi, K. Mikityuk, H. Ninokata and M. E. Ricotti reporting results of the study done in cooperation with POLIMI (Italy) has been published in Journal of Physics: Conference Series 501 (2014)


July 28, 2014

The IAEA Technical Working Group on Fast Reactors (TWG-FR) has been representing for decades the main international framework for information exchange and technical cooperation in the area of fast reactors. TWG-FR meets every year: the last, 47th meeting was on May 19-23, 2014 in Vienna. We represented Switzerland:


July 25, 2014

The Generation IV International Forum (GIF) Annual Report highlights the main achievements of the Forum in 2013, and in particular the progress made in the collaborative R&D activities of the ten existing project arrangements. FAST contributed to the chapter on Gas-cooled Fast Reactor.


July 23, 2014

TECDOC "Benchmark Analyses on the Control Rod Withdrawal Tests Performed during the PHÉNIX End-of-Life Experiments" (TECDOC-1742)", reporting the results of the Coordinated Research Project in which we took part, is now available on the IAEA publications website:


July 22, 2014

We presented five papers at International Conference on Nuclear Engineering (ICONE22) held on July 7-11, 2014 in Prague, Czech Republic: three of them were about different studies of Molten Salt Reactor, one was on designing of gas-cooled sub-critical transmuter, and one was on the OpenFOAM-based solver for simulation of reactor dynamics. The paper "Parametric lattice study of a graphite-moderated Molten Salt Reactor" presented by Boris Hombourger was selected for the best student paper award in the region Europe.


June 26, 2014

Russia's Beloyarsk-4 Sodium-cooled Fast Reactor BN-800 is close to start-up.

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