Reactor noise experiments considering high frequencies in the IPEN/MB-01 reactor
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2021
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Reactor noise experiments at high frequencies (up to 100 kHz) in subcritical configurations
have been performed at the IPEN/MB-01 research reactor facility. The core configuration
considered a short version of the IPEN/MB-01 core in a 24 × 26 rectangular array of fuel
rods. The subcritical configurations considered the control banks totally withdrawn and the
moderator poisoned with H3BO3. The boron concentrations were: 286.8 ± 10 and
578.6 ± 10 ppm. The pulses of two 3He detectors in the reflector region were summed and
inserted into the IPEN/MB-01 Correlator and the APSD (Auto Power Spectral Density) was
inferred through a mathematical model. The analysis reveals that the APSD in this frequency
range is best described by a four-mode decay model. According to the two-region two-group
(thermal and fast) kinetic model developed in this work, the first two decay modes describe
the thermal group and the other two describe the fast group. After a tedious and severe
analyses of the least-square fit of the experimental data, it was concluded that the kinetic
behavior of the thermal and fast neutrons can be considered uncoupled. The analysis of the
experimental data is still in progress and only the thermal group of the case of 286.8 ppm of
boron was analyzed and some parameters could be inferred. The most important one so far is
the prompt neutron generation time in the core region that could be inferred with a good
level of accuracy.
Como referenciar
SANTOS, ADIMIR dos; SANTOS, DIOGO F. dos. Reactor noise experiments considering high frequencies in the IPEN/MB-01 reactor. EPJ Web of Conferences, v. 247, p. 1-8, 2021. DOI: 10.1051/epjconf/202124708010. Disponível em: http://repositorio.ipen.br/handle/123456789/32314. Acesso em: 19 Apr 2024.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.