Absolute Measurement of β<sub><i>eff</i></sub>Based on Rossi-α Experiments and the Two-Region Model in the IPEN/MB-01 Research Reactor

Kuramoto, Renato Yoichi Ribeiro; Santos, Adimir dos; Jerez, Rogério; Diniz, Ricardo

doi:10.13182/nse06-120

Cited by 13 publications

(4 citation statements)

References 19 publications

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“…It should be noted that the  parameter is the only parameter that may be used for the comparison of the "detectors performance", since it depends only on the experimental data. The results for 3 He detectors presented here are supposed correct for all subcritical levels based on earlier experiments [13], [14], [31].…”

Section: Introductionsupporting

confidence: 64%

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A Simple Way to Overcome the Shortage of <inline-formula> <tex-math notation="LaTeX">$^{3}\rm {He}$ </tex-math> </inline-formula> Detectors in the IPEN/MB-01 Nuclear Reactor

Gonnelli

Pinto

Landim

et al. 2016

IEEE Trans. Nucl. Sci.

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Abstract-In order to overcome the shortage of 3 He detectors for subcritical experiments in the IPEN/MB-01 reactor, some experiments were performed employing less sensitive detectors, such as BF 3 , and a logic input module, which sums the counts from different detectors. Through microscopic and macroscopic neutron noise technique, it was possible to obtain, respectively, Rossi-α distribution and Auto Power Spectral Densities (APSD) for each detector configuration and various subcritical levels, and the prompt neutron decay constant (α) was extracted through a least squares procedure. In addition, Cross Power Spectral Densities (CPSD) were acquired for different types of detectors and the correlation among those detectors was confirmed. It was also observed that there was no loss of correlation among the neutron pulses, and therefore, the CPSD curves demonstrated the presence of correlated events. The  parameter was used as an indicator for the comparison of the results and for the quality of the experimental data. The obtained values demonstrate that the sum of counts technique does not present loss of information (correlated neutrons) even for different models and types of detectors, suggesting that the technique may be employed in neutron noise measurements for subcritical reactivity.

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Section: Introductionsupporting

confidence: 64%

“…The Rossi- method is based on the time distribution of the acquired neutron pulses followed by a trigger pulse from the detector [31].…”

Section: Methodsmentioning

confidence: 99%

A Simple Way to Overcome the Shortage of <inline-formula> <tex-math notation="LaTeX">$^{3}\rm {He}$ </tex-math> </inline-formula> Detectors in the IPEN/MB-01 Nuclear Reactor

Gonnelli

Pinto

Landim

et al. 2016

IEEE Trans. Nucl. Sci.

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“…Os parâmetros integrais obtidos para a fase I são mostrados na tabela 3.7. (Kuramoto et al, 2007b(Kuramoto et al, , 2008.…”

Section: Resultados E Comparaçõesunclassified

“…• Kuramoto et al (2008), medida absoluta de β ef f utilizando o método Rossi-α e um modelo de duas regiões;…”

Section: Bibliotecas De Dados Avaliadosunclassified

Implementação e qualificação de metodologia de cálculos neutrônicos em reatores subcríticos acionados por fontes externa de nêutrons e aplicações

Carluccio¹

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O trabalho teve como objetivo a investigação de Metodologias de Cálculo dos Reatores Subcríticos acionados por fonte externa de nêutrons, tais como,"Accelerator Driven Subcritical Reactor" (ADSR) e "Fusion Driven Subcritical Reator"(FDSR) , que são reatores nucleares subcríticos com uma fonte externa de nêutrons. Tais nêutrons são produzidos, no caso do ADSR, através da interação de partículas aceleradas (prótons, deutério) com um alvo (Pb, Bi, etc) ou através das reações de fusão, no caso do FDSR. Este conceito de reator vem sendo objeto de intensa pesquisa, sobretudo pela possibilidade de ser utilizado para transmutar o enorme inventário de rejeitos nucleares, principalmente os transurânicos (TRU) e os produtos de fissão de meia-vida longa (LLFP). Neste trabalho enfatiza os seguintes aspectos: (i) complementar e aprimorar a metodologia de cálculos neutrônicos com queima e transmutação e implementá-la computacionalmente; (ii) e utilizando esta metodologia, participar dos Projetos Coordenados de Pesquisa (CRP) da Agência Internacional de energia Atômica "Analytical and Experimental Benchmark Analysis of ADS" e "Collaborative work on use of LEU in ADS", principalmente na reprodução dos resultados experimentais da instalação subcrítica Yalina Booster e também no cálculo de um núcleo subcrítico do reator IPEN/MB-01, (iii) analisar comparativamente diferentes bibliotecas de dados nucleares, no cálculo de parâmetros integrais (k ef f), diferenciais (espectro, fluxo) e de queima e transmutação (inventário ao final do ciclo) e (iv) aplicar a metodologia desenvolvida em um estudo que possa ajudar na escolha futura de um sistema transmutador dedicado. Foram utilizados para tanto os seguintes códigos: MCNP (Transporte de partículas por Monte Carlo), MCB (acoplamento do MCNP com código de transmutação) e o sistema NJOY para o processamento dos arquivos de dados nucleares avaliados.

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Calculation, measurement and sensitivity analysis of kinetic parameters of Tehran Research Reactor

Hosseini

Vosoughi

Ghofrani

et al. 2010

Annals of Nuclear Energy

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Absolute Measurement of β_effBased on Rossi-α Experiments and the Two-Region Model in the IPEN/MB-01 Research Reactor

Cited by 13 publications

References 19 publications

A Simple Way to Overcome the Shortage of <inline-formula> <tex-math notation="LaTeX">$^{3}\rm {He}$ </tex-math> </inline-formula> Detectors in the IPEN/MB-01 Nuclear Reactor

A Simple Way to Overcome the Shortage of <inline-formula> <tex-math notation="LaTeX">$^{3}\rm {He}$ </tex-math> </inline-formula> Detectors in the IPEN/MB-01 Nuclear Reactor

Implementação e qualificação de metodologia de cálculos neutrônicos em reatores subcríticos acionados por fontes externa de nêutrons e aplicações

Calculation, measurement and sensitivity analysis of kinetic parameters of Tehran Research Reactor

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Absolute Measurement of βeffBased on Rossi-α Experiments and the Two-Region Model in the IPEN/MB-01 Research Reactor

Cited by 13 publications

References 19 publications

A Simple Way to Overcome the Shortage of <inline-formula> <tex-math notation="LaTeX">$^{3}\rm {He}$ </tex-math> </inline-formula> Detectors in the IPEN/MB-01 Nuclear Reactor

A Simple Way to Overcome the Shortage of <inline-formula> <tex-math notation="LaTeX">$^{3}\rm {He}$ </tex-math> </inline-formula> Detectors in the IPEN/MB-01 Nuclear Reactor

Implementação e qualificação de metodologia de cálculos neutrônicos em reatores subcríticos acionados por fontes externa de nêutrons e aplicações

Calculation, measurement and sensitivity analysis of kinetic parameters of Tehran Research Reactor

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Absolute Measurement of β_effBased on Rossi-α Experiments and the Two-Region Model in the IPEN/MB-01 Research Reactor