RENATO YOICHI RIBEIRO KURAMOTO
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Artigo IPEN-doc 27614 Main experiments performed at the IPEN/MB-01 RR using UO2 fuel rods core2020 - BITELLI, U.D.; COELHO, P.R.P.; FERREIRA, P.S.B.; ALVES, M.A.P.; SILVA, A.A.; SANTOS, A.; DINIZ, R.; JEREZ, R.; FUGA, R.; FANARO, L.C.C.B.; KURAMOTO, R.; ABE, A.; LAMBIASI, B.; GIADA, M.; FER, N.; MARTINS, F.; MURA, L.; SANTOS, D.F.; AREDES, V.; MAEDA, R.; GONNELI, E.; SILVA, A.F.P.; PURGATO, R.; GONÇALVES, L.B.; SILVA, G.S.A.; PINTO, L.; SOUZA, G.This paper aims to show the main experimental utilization of the IPEN/MB-01 zero power reactor during the last 30 years with 3663 operations cycles. The IPEN/MB-01 reactor it was mainly used to validation of calculation methodology used in nuclear reactor cores design.Capítulo IPEN-doc 14657 Reactor physics experiments in the IPEN/MB-01 research reactor facility IPEN(MB01)-LWR-RESR-001 CRIT-COEF-KIN2006 - SANTOS, ADIMIR dos; ANDRADE e SILVA, G.S.D.; FANARO, LEDA C.C.B.; YAMAGUCHI, MITSUO; JEREZ, ROGERIO; DINIZ, RICARDO; KURAMOTO, RENATO Y.R.Capítulo IPEN-doc 13926 Reactor physics experiments in the IPEN/MB-01 research reactor facility IPEN(MB01)-LWR-RESR-001 CRIT-COEF-KIN2008 - SANTOS, ADIMIR dos; ANDRADE e SILVA, G.S.D.; FANARO, LEDA C.C.B.; YAMAGUCHI, MITSUO; JEREZ, ROGERIO; DINIZ, RICARDO; KURAMOTO, RENATO Y.R.Capítulo IPEN-doc 13925 Isothermal experiment of the IPEN/MB-01 reactor2007 - SANTOS, ADIMIR dos; JEREZ, ROGERIO; KURAMOTO, RENATO Y.R.; YAMAGUCHI, MITSUO; ANDRADE e SILVA, G.S.D.Artigo IPEN-doc 11803 A new method for absolute measurement of 'Beta' sub(eff) based on microscopic noise experiments and the two-region model in the IPEN/MB-01 research reactor2007 - SANTOS, A. dos; KURAMOTO, R.Y.R.; JEREZ, R.; DINIZ, R.Artigo IPEN-doc 12197 Absolute measurement of betasub(eff) based on feynman-alfa experiments and the two-region model in the IPEN/MB-01 research reactor2007 - KURAMOTO, RENATO Y.R.; SANTOS, ADIMIR; JEREZ, ROGERIO; DINIZ, RICARDOArtigo IPEN-doc 12196 Kinetic parameters determination through power sectral densities measurements using pulse-type detectors in the IPEN/MB-01 research reactor2007 - KURAMOTO, RENATO Y.R.; SANTOS, ADIMIR dos; JEREZ, ROGERIO; DINIZ, RICARDONowadays, a collaborative effort to improve the prediction accuracy of some kinetic parameters has been recommended. In special, a target accuracy of ±3% (1 s.d.) was requested for βeff calculations, in way that βeff values must be measured with an experimental error of less than 3%. In such a way, the Reactor Physics Group at IPEN/MB-01 Research Reactor has been compiled an experimental data bank of kinetic parameters, including βeff, Λ, βeff/Λ and others, based on noise analyses techniques. The implemented techniques are: Power Spectral Densities (PSD) using current-type detectors, Rossi-α and Feynman-α techniques. All these techniques provided βeff values with uncertainties within the target accuracy. In order to conclude this data bank, in this work we have been performed PSD measurements using pulse-type detectors. The main advantage of this technique is that it is possible to eliminate some electronic modules, needed in the current-mode experiments, which are sources of parasitic noises. Furthermore, this technique can explain an anomalous behavior reported in current-mode measurements, which is a non-observation of a theoretical predicted plateau above 200Hz, approximately. Once completed, the kinetic parameters data bank should provide valuable information to determine whether or not the currently data libraries are sufficiently accurate to predict these measured parameters. Further, we intend to submit a proposal for the first international benchmark related to βeff measurements, to the International Reactor Physics Experiment Evaluation Project (IRPhEP, NEA data bank).Artigo IPEN-doc 10728 Determinacao experimental da constante de decaimento de neutrons prontos do reator IPEN/MB-01 via o metodo Rossi-alfa2005 - KURAMOTO, R.; SANTOS, A.; JEREZ, R.; BITELLI, U.D.; DINIZ, R.; MADI FILHO, T.; SANTOS, S.C.Artigo IPEN-doc 13401 Benchmarks on effective delayed neutron parameters and reactivity: a Brazilian IPEN/MB-01 contribution to the IRPhE project2008 - SANTOS, ADIMIR dos; KURAMOTO, RENATO Y.R.; DINIZ, RICARDO; JEREZ, ROGERIO; ANDRADE e SILVA, GRACIETE S. de; YAMAGUCHI, MITSUOArtigo IPEN-doc 13400 Heavy reflector experiment in the IPEN/MB-01 reactor2008 - SANTOS, ADIMIR dos; JEREZ, ROGERIO; BITELLI, ULYSSES D.; FANARO, LEDA C.C.B.; ANDRADE e SILVA, GRACIETE S. de; KURAMOTO, RENATO; MENDONCA, ARLINDO G.; FUGA, RINALDO; ABE, ALFREDO Y.; GAUDARD, CLAIRE V.This experiment performed in the IPEN/MB-01 research reactor facility is devoted to the measurements of physical parameters of a light water core surrounded by a stainless steel reflector. Several plates of SS-304 (3 mm thick) were introduced in the west face of the core of the IPEN/MB-01 reactor. The experimental results comprise several measured quantities such as: critical control bank positions, reactivity and relative power density distribution as a function of the number of SS-304 plates. The experimental results show clearly the competition between neutron absorption and neutron reflection in the SS-304 plates. The theoretical analysis was performed in a twofold independent approach. CEA/Cadarache used the Monte Carlo code TRIPOLI4 with JEFF3.1 library to analyse the experimental data while IPEN used the coupled NJOY/AMPX-II/TORT with ENDF/B-VI.8 and MCNP-5 with ENDF/B-VII.0. All calculation methodologies show applicability to describe the physics involved in the heavy reflector system. The quality of the recently released new nuclear data libraries (JEFF3.1 and ENDF/B-VII.0) was addressed and it was shown that these new data have a better quality than older libraries such as ENDF/B-VI.8.