Published April 2, 2020 | Version v1
Journal article Open

CORE SIM+ simulations of COLIBRI fuel rods oscillation experiments and comparison with measurements

  • 1. Chalmers University of Technology
  • 2. Ecole Polytechnique Fédérale de Lausanne (EPFL); Paul Scherrer Institut (PSI)
  • 3. Ecole Polytechnique Fédérale de Lausanne (EPFL)
  • 4. Paul Scherrer Institut (PSI)


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.



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CORTEX – Core monitoring techniques and experimental validation and demonstration 754316
European Commission