RICARDO NUNES DE CARVALHO
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Capítulo IPEN-doc 29790 In situ characterization of NORM waste from the oil industry2022 - DELLAMANO, J.C.; DAMATTO, S.R.; CARVALHO, R.N.; MENEGHINI, A.A.; MARUMO, J.T.; MADUAR, M.F.; VICENTE, R.In the oil industry, radioactive wastes are generated in the oil production platforms containing natural radionuclides, such as 226Ra and 228Ra, the NORM waste. This waste is mainly in the form of produced water, sludge and scales which should be characterized for the correct final destination. The Brazilian laws establish that the NORM wastes from the oil production must comply with Law 10308 of November 20, 2001, which determine in its article 7, "The disposal of radioactive waste of any kind in the oceanic islands, the continental shelf and the Brazilian territorial waters is prohibited." Therefore, the NORM waste from offshore oil extraction rigs should be transported to onshore facilities. There are two options for the destination of this material: industrial landfill, in the case of activity concentrations are below clearance limits established by Brazilian Nuclear Commission, CNEN; or on the contrary, to intermediate storage facilities, until final disposal is decided. Currently, the oil production companies take samples from the waste and send them to radiometric laboratories in order to evaluate their activity concentration by gamma spectrometry. The complete process takes more than six months to be concluded. Nuclear and Energy Research Institute, IPEN, is making efforts to solve the management problems of NORM waste from oil extraction, including conduct research aiming at characterizing the waste. The objective of the paper is to present the results of in situ characterization of drums containing oil sludge using portable gamma spectrometers.Resumo IPEN-doc 29763 In situ characterization of NORM waste from the oil industry2020 - DELLAMANO, JOSE C.; DAMATTO, SANDRA R.; MADUAR, MARCELO F.; MARUMO, JULIO T.; CARVALHO, RICARDO N.; VICENTE, ROBERTO; MENEGHINI, ARTHUR A.Resumo IPEN-doc 27952 Naturally occurring radionuclides in a fish reference material2019 - MOREIRA, EDSON G.; SILVA, PAULO S.C.; MAIHARA, VERA A.; TAPPIZ, BRUNO; NISTI, MARCELO B.; SAUEIA, CATIA H.R.; CARVALHO, RICARDO N.Resumo IPEN-doc 25908 Gamma ray spectroscopy studies on low and intermediate level radioactive waste from Angra-1 nuclear power plant2018 - SILVA, PAULO S.C. da; ZAHN, GUILHERME S.; CARVALHO, RICARDO N. de; GENEZINI, FREDERICO A.The determination of the radionuclide composition of low - and intermediate - level radioactive waste is of paramount importance for the design and implementation of Brazil`s planned radioactive waste repository. While there is some knowledge of the radionuclides expected to be present, the exact activity values in each of the waste bins are not determined with su±cient precision, so theres an ongoing e®ort to analyze the composition of this waste and make the radioactive inventory of the bins containt, which comprises several institutions and laboratories. In the present work the gamma - ray spectroscopy of samples of resin, ¯lters and evaporator concentrate from Angra 1 nuclear power plant have been studied. Small aliquots (» 500 mg) of the distinct samples were stored in glass vials and gamma- counted in a characterized high resolution germanium detector. In order to determine the best counting time, these aliquots were counted for 24h (real - time), with the spectroscopy results saved after each full hour of counting. The resulting twenty four spectra were then analyzed with Canberras Genie - 2000 software, using ISOCS e±ciency correction tool. The results for each sample were then compared to determine the required counting time for each of the radioisotopes of interest.Resumo IPEN-doc 24522 The stories of Goiânia2017 - CARVALHO, R.N.In the beginning of this year, I had to report the events related to the accident with 137Cs in Goiânia under a personal stance, what led me to a process of catharsis. After participating in such a significant event, and today, after reviewing historical events by means of published papers and newspaper reports, it is notorious the difference between the chaos that I experienced there and the order and clarity of the facts that I perceive today. As in the phrase attributed to Heraclitus, "No man ever steps in the same river twice, for it is not the same river and he is not the same man", during the three months while I worked as a radioprotection technician, I plunged into a sea of emotions, closely accompanying the evolution of the health of some radiation victims, and working in the decontamination and demolition of their houses. The unknowns, the dedication of some professionals and the disdain of others, along with the unusual facts that the response team and the patients were facing, gave me a sad and hilarious tone that served as a backdrop to the official history of the accident of Goiânia.Publicação IPEN-doc 03395 Artigo IPEN-doc 21029 How the nuclear safety team conducts emergency exercises at the IEA-R1 reactor2015 - VAZ, ANTONIO C.A.; SILVA, DAVILSON G.; TOYODA, EDUARDO Y.; SANTIA, PAULO S.; CONTI, THADEU N.; SEMMLER, RENATO; CARVALHO, RICARDO N.Resumo IPEN-doc 10811 Area monitoring and radiation dose in the IEA-R1 reactor building2004 - LOPES, V.M.; TOYODA, E.Y.; COSTA, C.A.R.; CARVALHO, R.N.; LEMES, R.B.Artigo IPEN-doc 11993 Experience of IPEN-CNEN/SP in the executation of the first phase of the safety culture enhancement programme at IEA-R1 research reactor2007 - VIEIRA NETO, ANTONIO S.; MARRA NETO, ADOLFO; OLIVEIRA, PATRICIA da S.P. de; SAXENA, RAJENDRA N.; CARVALHO, RICARDO N. de; FRAJNDLICH, ROBERTO; PAIVA, ROSEMEIRE P.Artigo IPEN-doc 07085 A dosimetria externa realizada pelo Laboratorio de Dosimetria Termoluminescente do IPEN/CNEN-SP2001 - MANZOLI, J.E.; CARVALHO, R.N.