RINALDO FUGA
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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.Artigo IPEN-doc 26343 IPEN/MB-01 reactor experiments with nickel reflectors2019 - SILVA, GRACIETE S. de A. e; MURA, LUIS F.L.; FUGA, RINALDO; SANTOS, ADIMIR dosIn the validation and verification processes of calculation methodologies and associated nuclear data libraries, the existence of experiments that can be considered benchmarks is of fundamental importance. For this purpose, a set of experiments with heavy material nuclear reflector was performed in the IPEN/MB-01 reactor using nickel plates properly inserted in the west face of the reactor core. A total of 32 plates around 3 mm thick were used in the experiment. The axial width and length were sufficient to cover the entire active reactor core. For each plate placement step, reactivity measurements were made due to their insertion in the core; as well as of the critical position of the equally removed BC1 and BC2 control rods. It could be observed that the increase of neutron absorption and consequent decrease of neutron moderation dominated the whole physics of the problem when few plates of reflective material were inserted (about 3 plates). Thereafter, neutron reflection became important overcoming neutron absorption; the reactivity increased until it surpassed the situation without plate (excess reactivity zero) obtaining an increase (net gain) of reactivity with the 32 plates inserted (about 295 pcm). Therefore, it was observed that the reflected nucleus became more reactive than the nucleus without reflective material. The theoretical analysis using MCNP-5 and ENDF/B-VII.0 nuclear data library showed the physical aspects of neutron absorption and reflection in the heavy reflector considered; however, it presented a discrepancy when fast neutron reflection dominates the physical phenomenon of neutron transport. In order to verify the impact of other models of thermal scattering of hydrogen in water for the computational simulations of the experiments, three models were considered, besides the one used by the ENDF/B-VII.0 library: ENDF/B-VII.0 scattering law; new evaluation of the S (alpha, beta) for hydrogen bound in water performed in Bariloche Atomic Center, Argentina; and the calculated with new released evaluations for (235)U, (238)U and (16)O.Artigo IPEN-doc 19376 Heavy reflector experiments composed of carbon steel and nickel in the IPEN/MB-01 reactor2013 - SANTOS, ADIMIR dos; ANDRADE e SILVA, GRACIETE S. de; MURA, LUIS F.; FUGA, RINALDO; JEREZ, ROGERIO; MENDONCA, ARLINDO G.Artigo IPEN-doc 10722 Analise teorica do ponto de inversao do coeficiente de reatividade isotermico do reator IPEN/MB-012005 - SANTOS, A.; ANDRADE e SILVA, G.S.; MENDONCA, A.G.; FUGA, R.; ABE, A.Y.Artigo IPEN-doc 10782 Utilização do material aço inox como barra de controle do reator IPEN/MB-012005 - ABE, A.; FUGA, R.; JEREZ, R.Artigo IPEN-doc 10550 A set of critical loading configurations of the IPEN/MB-01 reactor2004 - SANTOS, A.; FANARO, L.C.C.B.; SIQUEIRA, P.D.; JEREZ, R.; ABE, A.Y.; FUGA, R.Artigo IPEN-doc 19370 Reactivity effect of a hevy water tank as reflector in the IPEN/MB-01 reactor2013 - SANTOS, ADIMIR dos; ABE, ALFREDO Y.; MAEDA, REINALDO M.; FUGA, RINALDOArtigo IPEN-doc 08689 Experimento do vazio local no reator IPEN/MB-012002 - ABE, A.; ANGIOLETTO, E.; PASQUALETTO, H.; FUGA, R.; JEREZ, R.Artigo IPEN-doc 15266 Critical loading configurations of the IPEN/MB-01 reactor with UOsub(2)GDsun(2)Osub(3) burnable poison rods2009 - ABE, ALFREDO; FUGA, RINALDO; SANTOS, ADIMIR dos; ANDRADE e SILVA, GRACIETE S. de; FANARO, LEDA C.C.B.; YAMAGUCHI, MITSUO; JEREZ, ROGERIOArtigo IPEN-doc 09468 Experimental utilization of the IPEN/MB-01 reactor2003 - BITELLI, U.D.; SANTOS, A.; JEREZ, R.; DINIZ, R.; FANARO, L.C.C.B.; ABE, A.Y.; MOREIRA, J.M.L.; FER, N.; GIADA, M.R.; FUGA, R.