https://doi.org/10.1051/epjconf/202124721006
CORE SIM+ SIMULATIONS OF COLIBRI FUEL RODS OSCILLATION EXPERIMENTS AND COMPARISON WITH MEASUREMENTS
1 Chalmers University of Technology, Department of Physics, Division of Subatomic and Plasma Physics, SE-412 96 Gothenburg, Sweden
2 École Polytechnique Fédérale de Lausanne, Laboratory for Reactor Physics and Systems behaviour, CH-1015 Lausanne, Switzerland
3 Paul Scherrer Institute, Nuclear Energy and Safety Research Division, CH-5232 Villigen, Switzerland
antmyl@chalmers.se
demaz@chalmers.se
vinai@chalmers.se
vincent.lamirand@epfl.ch
adolfo.rais@epfl.ch
oskari.pakari@epfl.ch
pavel.frajtag@epfl.ch
daniel.godat@epfl.ch
mathieu.hursin@epfl.ch
gregory.perret@psi.ch
axel.laureau@epfl.ch
carlo.fiorina@epfl.ch
andreas.pautz@epfl.ch
Published online: 22 February 2021
At EPFL, the CROCUS reactor has been used to carry out experiments with vibrating fuel rods. The paper presents a first attempt to employ the measured data to validate CORE SIM+, a neutron noise solver developed at Chalmers University of Technology. For this purpose, the original experimental data are processed in order to extract the necessary information. In particular, detector recordings are scrutinized and detrended, and used to estimate CPSDs of detector pairs. These values are then compared with the ones derived from the CORE SIM+ simulations of the experiments. The main trend of the experimental data along with the values for some detectors are successfully reproduced by CORE SIM+. Further work is necessary on both the experimental and computational sides in order to improve the validation process.
Key words: Neutron noise / research reactor / fuel rod vibration / code validation
© The Authors, published by EDP Sciences, 2021
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
