WALTER RICCI FILHO
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Resumo IPEN-doc 24611 Instrumented fuel assembly2017 - UMBEHAUN, P.E.; ANDRADE, D.A.; TORRES, W.M.; RICCI, W.The flow rate in the channel between two fuel assemblies is very difficult to estimate or measured. This flow rate is very important to the cooling process of the external plates. This work presents the project and construction of an instrumented fuel assembly with the objectives of perform more accurate safety analysis for the IEA-R1 reactor; determine the actual cooling conditions (mainly in the outermost fuel plate) and validate computer codes used for thermalhydraulic and safety analysis of research reactors. Fourteen thermocouples were installed in this instrumented fuel assembly. Four in each lateral channel, one in the inlet nozzle and one in the outlet nozzle. There are three thermocouples in each channel to measure the clad temperature and one thermocouple to measure the fluid temperature. Three series of experiments, for three different core configuration were carried out with the instrumented fuel assembly. In two experiments a box was installed around the core to reduce the cross flow between the fuel assembly and measure the impact in the temperatures of external plates. The experimental results obtained with the instrumented fuel element are very consistent with the phenomenology involved. Given the amount of information generated and its utility in the design, improvement and qualification in construction, assembly and manufacturing of instrumented fuel, this project turned out to be an important landmark on the thermal-hydraulic study of research reactor cores. The proposed solutions could be useful for other research reactors.Artigo IPEN-doc 23867 Digital systems implemented at the IPEN nuclear research reactor (IEA-R1)2013 - CARDENAS, JOSE P.N.; MADI FILHO, TUFIC; RICCI FILHO, WALTER; CARVALHO, MARCOS R. de; BENEVENUTI, ERION de L.; GOMES NETO, JOSEIPEN (Nuclear and Energy Research Institute) was founded in 1956 with the main purpose of doing research and development in the field of nuclear energy and its applications. It is located at the campus of University of Sao Paulo (USP), in the city of Sao Paulo, in an area of nearly 500,000 m2. It has over 1.000 employees and 40% of them have qualification at master or doctor level The institute is recognized as a national leader institution in research and development (R&D) in the areas of radiopharmaceuticals, industrial applications of radiation, basic nuclear research, nuclear reactor operation and nuclear applications, materials science and technology, laser technology and applications. Along with the R&D, it has a strong educational activity, having a graduate program in Nuclear Technology, in association with the University of Sao Paulo, ranked as the best university in the country. The Federal Government Evaluation institution CAPES, granted to this course grade 6, considering it a program of Excellence. This program started at 1976 and has awarded 458 Ph.D. degrees and 937 master degrees since them. The actual graduate enrollment is around 400 students. One of major nuclear installation at IPEN is the IEA-R1 research reactor; it is the only Brazilian research reactor with substantial power level suitable for its utilization in researches concerning physics, chemistry, biology and engineering as well as for producing some useful radioisotopes for medical and other applications. IEA-R1 reactor is a swimming pool type reactor moderated and cooled by light water and uses graphite and beryllium as reflectors. The first criticality was achieved on September 16, 1957. The reactor is currently operating at 4.5 MW power level with an operational schedule of continuous 64 hours a week. In 1996 a Modernization Program was started to establish recommendations in order to mitigate equipment and structures ageing effects in the reactor components, detect and evaluate obsolescence of some electrical and electronic systems. In this work we will show a retrospective and results of digital systems applied to IEA-R1 reactor concerning electronic equipments and systems refurbishment and modernization and the necessity of a new control console implementation.Capítulo IPEN-doc 21750 IEA-R1 Nuclear Reactor: Facility specification and experimental results2015 - UMBEHAUN, P.E.; ANDRADE, D.A. de; TORRES, W.M.; RICCI FILHO, W.Artigo IPEN-doc 21086 Design of a new wet storage rack for spent fuels from IEA-R1 reactor2015 - RODRIGUES, ANTONIO C.I.; MADI FILHO, TUFIC; SIQUEIRA, PAULO T.D.; RICCI FILHO, WALTERArtigo IPEN-doc 18771 On the water for filling and draining procedures for the IEA-R1 beam holes2012 - TORRES, WALMIR M.; UMBEHAUN, PEDRO E.; MATTAR NETO, MIGUEL; FALOPPA, ALTAIR A.; OTOMO, HARUYUKI; RICCI, WALTER; PIRES, ANTONIO L.; FERNANDO, ALBERTO J.; BERRETTA, JOSE R.; CARVALHO, RICARDO N.; TOYODA, EDUARDO Y.Artigo IPEN-doc 15592 Reliability database of IEA-R1 brazilian research reactor: applications to the improvement of installation safety2010 - OLIVEIRA, P.S.P.; TONDIN, J.B.M.; MARTINS, M.O.; YOVANOVICH, M.; RICCI FILHO, WALTERArtigo IPEN-doc 10575 Base de dados de confiabilidade de componentes para os reatores de pesquisa IEA-R1 e IPEN/MB-01: resultados e aplicacoes2005 - OLIVEIRA, P.S.P.; SAUER, M.E.L.J.; KURAZUMI, E.P.; VIEIRA NETO, A.S.; TONDIN, J.B.M.; RICCI FILHO, W.; MARTINS, M.O.; BITELLI, U.D.; JEREZ, R.Artigo IPEN-doc 19341 Borated stainless steel storage project to the spent fuel of the IEA-R1 reactor2013 - RODRIGUES, ANTONIO C.I.; MADI FILHO, TUFIC; RICCI FILHO, WALTERArtigo IPEN-doc 08704 Calibracao de um dispositivo de mapeamento de fluxo de neutrons - SPND/Rodio no reator IEA-R1, por meio do metodo de ativacao de folhas2002 - RICCI FILHO, W.; DIAS, M.S.; TONDIN, J.B.M.; KOSKINAS, M.F.Artigo IPEN-doc 08671 Base de dados de confiabilidade de componentes para os reatores de pesquisa IEA-R1 e IPEN/MB-01: objetivos, estrutura e conteudo2002 - OLIVEIRA, P.S.P.; TONDIN, J.B.M.; RICCI FILHO, W.; MARTINS, M.O.; KURAZUMI, E.P.; VIEIRA NETO, A.S.; SAUER, M.E.L.J.; JEREZ, R.; BITELLI, U.D.