Izvestiya vuzov. Yadernaya Energetika

The peer-reviewed scientific and technology journal. ISSN: 0204-3327

A Computer Code for Optimizing the Neutronic Model Parameters Based on Results of Integral Experiments

6/22/2023 2023 - #02 Modelling processes at nuclear facilities

Andrianov A.A. Andrianova O.N. Korovin Yu.A. Kuptsov I.S. Spiridonova A.A.

DOI: https://doi.org/10.26583/npe.2023.2.12

UDC: 621.039.51

The paper describes in brief the functional capabilities of a computer code for optimizing the neutronic model parameters (neutron data, process parameters, and their covariance matrices) based on results of integral experiments using conditional nonlinear multi-parameter optimization algorithms (ONIX). The code’s application scope includes adjustment of constants, process parameters and their covariance matrices based on integral measurement results, formulation of requirements with respect to the neutron data uncertainties for achieving the target accuracies in calculation of the reactor functionals, and estimation of the reactor performance prediction accuracy (constant and process uncertainty), as well as the informativity and similarity metrics of integral experiments with respect to each other and in relation to the target facility. The paper also considers some examples of using the ONIX code to refine the neutronic models of nuclear facilities and fuel cycle systems based on results of reactor physics experiments.

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neutronic performance benchmark model integral experiment data assimilation neutron constants process parameters

Link for citing the article: Andrianov A.A., Andrianova O.N., Korovin Yu.A., Kuptsov I.S., Spiridonova A.A. A Computer Code for Optimizing the Neutronic Model Parameters Based on Results of Integral Experiments. Izvestiya vuzov. Yadernaya Energetika. 2023, no. 2, pp. 148-161; DOI: https://doi.org/10.26583/npe.2023.2.12 (in Russian).

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