ALVARO LUIZ GUIMARAES CARNEIRO
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Artigo IPEN-doc 24161 Technical feasibility study on volumetric reduction of radioactive wastes using plasma technology2017 - PRADO, E.S.P.; DELLAMANO, J.C.; CARNEIRO, A.L.G.; SANTOS, R.C.; PETRACONI, G.; POTIENS JUNIOR, A.J.The radioactive waste arising from nuclear reactors, hospitals, industry and research institutes are generated daily with a considerable amount. To final dispose of these radioactive waste safely and cost effectively, they must be transformed into physical and chemical compounds suitable for radionuclides immobilization with maximum volume and exhaust gaseous reduction. In this scope, among the promising technologies for the radioactive waste treatment, plasma technology allows reducing substantially the waste volume after exposing them to temperatures above 2,500ºC. In the planning and management of radioactive waste, the challenges related to plasma technology are presented as a motivation factor for the possible implantation of plasma reactors in nuclear plants and research centers aiming at improving the process of radioactive waste management.Artigo IPEN-doc 11055 O consumismo: o cerne dos problemas sociais e das mudancas climaticas globais2005 - MAI, L.A.; CARNEIRO, A.L.G.; AQUINO, A.R.; ALMEIDA, J.R.Artigo IPEN-doc 13462 Sustentabilidade: uma questao de redefinicao de valores2008 - MAI, LUIZ A.; CARNEIRO, ALVARO L.G.Artigo IPEN-doc 19406 Expert system for fault diagnosis in process control valves using fuzzy-logic2013 - CARNEIRO, ALVARO L.G.; PORTO JUNIOR, ALMIR C.S.Artigo IPEN-doc 08706 Deteccao de falhas em valvulas moto-operadas utilizando Transformada de Wavelet2002 - CARNEIRO, A.L.G.; SILVA, A.A.; TING, D.K.S.; UPADHYAYA, B.R.Artigo IPEN-doc 19480 Development of a preliminary decommissioning plan of the reactor IPEN/MB-012013 - VIVAS, ARY de S.; CARNEIRO, ALVARO L.G.Artigo IPEN-doc 12036 Correlation analysis of energy indicators for sustainable development using multivariate statistical technique2007 - CARNEIRO, ALVARO L.G.; SANTOS, FRANCISCO C.B. dosArtigo IPEN-doc 09840 Algumas relacoes envolvendo indices ambientais, sociais e energeticas2004 - MAI, L.A.; CARNEIRO, A.L.G.Artigo IPEN-doc 07640 Development of an integrated condition monitoring system for motor-operated valves for Brazilian Nuclear Power Plants2001 - CARNEIRO, A.L.G.; SILVA, A.A.; PERRENOUD, H.G.; CUNHA, A.R.; UPADHYAYA, B.R.Motor operated valves (MOV's) are widely used in industry to control fluid flow in various applications. In nuclear power systems they are especially crucial for the safe operation of plants and are applied extensively in safety related systems. Condition-based maintenance of MOV's avoids unexpected outages and prevents unnecessary maintenance procedures. Therefore, maintenance programs are being implemented based on the ability to diagnose modes of degradation and to take measures to prevent incipient failures, improving plant reliability and reducing maintenance costs. The basic idea of this paper is to present a research project that consists of developing an integrated system for diagnosis and conditioning monitoring of MOV that are used in Angra I and Angra II Brazilian Nuclear Power Plants operated by Eletronuclear Company. The methodology used in this research is the motor power signature analysis during open-to-close and close-to-open stroke time. The system is based on three modules and a database. The first module is the SignatureCollector that basically imports the motor power signature of the valve and inserts it in the database with information on the measured valve. The second module is the SignatureAnalyzer that consists in the application of different techniques for analysis of anomalies, such as an expert system capable to do inferences based on fuzzy logic, multi-resolution wavelet transform, and trending analysis. The third module, SystemManager, is used for reporting consultation and parameters alteration on database, in other words, the user interface. Finally the database is responsible for storing the power signatures, any important data related to the valve, the reports generated by the SignatureAnalyzer and the parameters of each one of the modules, including those pertinent to the different techniques of analysis. The system is being conceived using the object-oriented model that detaches the program to be implemented in a peculiar language. This is very important from the point of view of the application because it makes possible to the modules be implemented using different programming languages and different techniques. The database is based on the relational model. Perhaps the most important point of this model is the integrity that he provides, under two different aspects: data integrity and transaction integrity The test and validation are being performed using data from operating pressurized water reactor plants and bench test MOV data.Artigo IPEN-doc 02114 Medidas dos tempos de resposta dos sensores de seguranca do reator PWR Angra I, utilizando a tecnica de analise de ruido1993 - CARNEIRO, A.L.G.; SILVA, A.A.; ASSUMPCAO FILHO, E.O.; LOPES, P.R.L.; NAPOLITANO, O.C.