GERSON FAINER
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Artigo IPEN-doc 29551 IEA-R1 renewed primary system pump B1-B nozzles stress analysis2022 - FALOPPA, A.A.; FAINER, G.; FIGUEIREDO, C.D.R.; CARVALHO, D.S.M.; MATTAR NETO, M.The present report is a summary of the structural analysis of the pump nozzles applying the finite element method by using the Ansys computer program. The IEA-R1 RR is an open pool-type moderated and cooled by light water using beryllium/graphite as a reflector. The reactor can reach up to 5MW of thermal power cooled by the primary and secondary systems. The primary coolant system consists of a piping arrangement, a decay tank, two pumps, and two heat exchangers. The primary pump B1-B presented some failures requiring refurbishment by a new one. The pump used in the IEA-R1 must meet the requirements inherent to the nuclear installation, in addition to the operational requirements for rotating equipment, such as flow and pressure, and structural integrity of the body and nozzles. The supplier specified the type of pump suitable for the System. The pump furnished granted mechanical allowable loads for the nozzles that were lower than the loads imposed by the piping on the nozzles. To enable the installation of the pump in the primary circuit, new support was inserted in the piping system next to the pump minimizing efforts and deformations. A piping stress analysis was carried out to obtain the new efforts imposed on the nozzles. For validation of the motor pump set, a verification of the nozzles was done compared with API 610 standard loads, and the allowable loads of the provider. Finally, a structural analysis of the pump nozzles with the new loads was developed using the finite element method. The calculated stresses meet the limits prescribed by the ASME code; therefore, the new B1-B Pump is approved for operation at the IEA-R1 Nuclear Research Reactor primary circuit.Artigo IPEN-doc 28230 IEAR1 renewed primary system pump B1B nozzles stress analysis2021 - FALOPPA, A.A.; FAINER, G.; FIGUEIREDO, CAROLINA D.R.; CARVALHO, D.S.M.; MATTAR NETO, M.Artigo IPEN-doc 26370 Structural integrity analysis of the heavy water reflector tanks of the IPEN/MB-01 Reactor2019 - FAINER, GERSON; FALOPPA, ALTAIR A.; OLIVEIRA, CARLOS A. de; JUNQUEIRA, FERNANDO C.; FIGUEIREDO, CAROLINA D.R.; SANTOS, MARCELO M. dos; CARVALHO, DANIEL S.M.; MATTAR NETO, MIGUELThe IPEN/MB-01 is a zero power research reactor designed and built by IPEN in partnership with the Brazilian Navy. This reactor is located in IPEN and began operating in 1988. IPEN/MB-01 has been used as an experimental facility for studies on neutron parameters of nuclear reactors moderated by light water. In 2016, a project to modify the core structure of IPEN/MB-01 Reactor was initiated. This project aims the replacement of the rod-type fuel structure for a plate-type one. In order to optimize the performance of the experiments, four tanks filled with D2O were installed around the core. This new core will contain fuel elements that are similar to the ones that will be used in the Brazilian Multipurpose Reactor. In this paper, a complete structural integrity analysis of the four heavy water reflector tanks installed in IPEN/MB-01 Reactor is presented. A numerical analysis was performed applying the finite element method, using ANSYS software and considering ASME Code VIII, division 2.Artigo IPEN-doc 26369 Structural assessment of pressurizer V-102 of the circuit Orquídea2019 - FAINER, GERSON; FALOPPA, ALTAIR A.; ALMEIDA, JOEDSON T. de; FIGUEIREDO, CAROLINA D.R.; CARVALHO, DANIEL S.M.; MATTAR NETO, MIGUELThe Water Experimental Circuit (CEA) was built in IPEN in eighties and had the aim to perform thermal hydraulic experiments, simulating operational condition of Pressurized Water Reactors and Boiling Water Reactors. The CEA operated until 1984 and since then it was decommissioned. In order to do hydrodynamics tests in MTR fuel type elements of nuclear research reactor, in the years 2015, was conceived an experimental circuit named Orquidea, which shall operate with low pressure and temperature. This paper assess the mechanical and structural suitability of the Pressurizer V-102, that was used in the former Water Experimental Circuit (CEA) aiming reuse this vessel in new the circuit. The methodology applied to evaluate the vessel was based on ASME code, Section VIII, Division 1 & 2.Resumo IPEN-doc 24609 Refurbishment of the IEA-R1 primary coolant system piping supports2017 - FALOPPA, A.A.; FAINER, G.; OLIVEIRA, C.A.; MATTAR, M.This paper presents the study and the structural analysis of the IEA-R1 primary circuit piping supports, considering all the changes involved in the piping system replacement conducted in 2014. The IEA-R1 is a nuclear reactor for research purposes designed by Babcox-Willcox that is operated by IPEN since 1957. The reactor life management and modernization program is being conducted for the last two decades and already resulted in a series of changes, especially on the reactor coolant system. This set of components, divided in primary and secondary circuit, is responsible for the circulation of water into the core to remove heat. In the ageing management program that includes regular inspection, some degradation was observed in the primary piping system. As result, the renewing of the piping system was carried out in 2014. Moreover the poor condition of some original piping supports gave rise to the refurbishment of all piping supports. The aim of the present work is to review the design of the primary system piping supports taking into account the current conditions after the changes and refurbishment.Resumo IPEN-doc 24608 IEA-R1 renewed primary coolant piping system stress analysis2017 - FALOPPA, A.A.; FAINER, G.; OLIVEIRA, C.A.; MATTAR NETO, M.A partial replacement of the IEA-R1 piping system was conducted in 2014. The aim of this work is to perform the stress analysis of the renewed primary piping system of the IEA-R1, taking into account the as built conditions and the pipe modifications. The nuclear research reactor IEA-R1 is a pool type reactor designed by Babcox- Willcox, which is operated by IPEN since 1957. The primary coolant system is responsible for removing the residual heat of the Reactor core. As a part of the life management, a regular inspection detected some degradation in the primary piping system. In consequence, part of the piping system was replaced. The partial renewing of the primary piping system did not imply in major piping layout modifications. However, the stress condition of the piping systems had to be reanalyzed. The structural stress analysis of the primary piping systems is now presented and the final results are discussed.Artigo IPEN-doc 24028 Structural evaluation of IEA-R1 primary system pump nozzles2017 - FAINER, GERSON; FALOPPA, ALTAIR A.; OLIVEIRA, CARLOS A. de; MATTAR NETO, MIGUELThe IEA-R1 pumps of the primary coolant system may be required to withstand design and operational conditions. IEA-R1 nuclear research reactor is an open pool type reactor operated by IPEN since 1957. The reactor can be operated up to 5MW heating power since it was upgraded in a modernization program conducted by IPEN. The primary coolant system is composed by the piping system, decay tank, two heat pumps and two heat exchangers. In the latest arrangement upgrade of the primary system, conducted in 2014 as part of an aging management program, a partial replacement of the coolant piping and total replacement of piping and pump supports were done. As consequence, reviewed loads in the pump nozzles were obtained demanding a new evaluation of them. The aim of this report is to present the structural evaluation of the pump nozzles, considering the new loads coming from the new piping layout, according to: API 610 code verification, Supplier loads and structural analysis applying finite element method, by using the ANSYS computer program, regarding ASME VIII Div 1 & 2 recommendations.Artigo IPEN-doc 22849 Avaliação estrutural de um suporte da tubulação do sistema de refrigeração do reator nuclear de pesquisa IPEN IEA-R12016 - FALOPPA, ALTAIR A.; FAINER, GERSON; OLIVEIRA, CARLOS A. de; MATTAR NETO, MIGUELEste trabalho apresenta a avaliação estrutural de um suporte da tubulação do Circuito Primário do reator nuclear de pesquisa do Instituto de Pesquisas Energéticas e Nucleares - IPEN. O reator IEA-R1 é um reator nuclear de pesquisa projetado pela Babcox-Wilcox que opera no IPEN desde 1957. Um programa de modernização tem sido conduzido nos últimos 25 anos, e uma série de modificações foram implementadas, especialmente no sistema de refrigeração do reator. Entre as modificações mais recentes está a troca de componentes do sistema de refrigeração, tais como: bombas, trocadores de calor e tubulação, além da reforma dos sistemas de tratamento e re-tratamento de água. Este conjunto de equipamentos, divididos em sistema primário e secundário, é responsável pela circulação da água no núcleo do reator para a retirada de calor gerado pela fissões nucleares do U-235. A substituição parcial da tubulação do Circuito Primário do reator IEA-R1, realizada em 2014, resultou em alterações nos suportes existentes e no desenvolvimento de um novo tipo de suporte para a tubulação. O objetivo deste trabalho é apresentar o modelo de cálculo aplicado à avaliação estrutural deste novo suporte sob as diversas condições de carregamentos aplicáveis.Artigo IPEN-doc 21009 IEA-R1 renewed primary coolant piping system stress analysis2015 - FAINER, GERSON; FALOPPA, ALTAIR A.; OLIVEIRA, CARLOS A. de; MATTAR NETO, MIGUELArtigo IPEN-doc 21008 Refurbishment of the IEA-R1 primary coolant system piping supports2015 - FAINER, GERSON; FALOPPA, ALTAIR A.; OLIVEIRA, CARLOS A. de; MATTAR NETO, MIGUEL