CORE SIM+ simulations of COLIBRI fuel rods oscillation experiments and comparison with measurements
Paper i proceeding, 2020

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.

fuel rod vibration

research reactor

Neutron noise

code validation

Författare

Antonios Mylonakis

Chalmers, Fysik, Subatomär, högenergi- och plasmafysik

Christophe Demaziere

Chalmers, Fysik, Subatomär, högenergi- och plasmafysik

Paolo Vinai

Chalmers, Fysik, Subatomär, högenergi- och plasmafysik

Vincent Lamirand

Ecole Polytechnique Federale de Lausanne (EPFL)

Paul Scherrer Institut

Aldolfo Rais

Ecole Polytechnique Federale de Lausanne (EPFL)

Oskari Pakari

Ecole Polytechnique Federale de Lausanne (EPFL)

Pavel Frajtag

Ecole Polytechnique Federale de Lausanne (EPFL)

Daniel Godat

Ecole Polytechnique Federale de Lausanne (EPFL)

Mathieu Hursin

Ecole Polytechnique Federale de Lausanne (EPFL)

Paul Scherrer Institut

Gregory Perret

Paul Scherrer Institut

Axel Laureau

Ecole Polytechnique Federale de Lausanne (EPFL)

Carlo Fiorina

Ecole Polytechnique Federale de Lausanne (EPFL)

Andreas Pautz

Paul Scherrer Institut

Ecole Polytechnique Federale de Lausanne (EPFL)

PHYSOR 2020: Transition to a Scalable Nuclear Future

1207

International conference on Physics of Reactors - PHYSOR 2020
Cambridge, United Kingdom,

Core monitoring techniques and experimental validation and demonstration (CORTEX)

Europeiska kommissionen (EU), 2017-09-01 -- 2021-08-31.

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2020-09-29