ADEMAR JOSE POTIENS JUNIOR
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Artigo IPEN-doc 26887 Use of plasma reactor to viabilise the volumetric reduction of radioactive wastes2020 - PRADO, E.S.P.; MIRANDA, F.S.; PETRACONI, G.; POTIENS JUNIOR, A.J.Nuclear reactors, hospitals, industries and research institutes generate considerable amounts of radioactive waste every day. To dispose this waste in a safe and costeffective manner, it must be treated by immobilising the radionuclides and, for better stocking capacity, it must be volumetrically reduced as much as possible. To this end, plasma technology, among other promising technologies for radioactive waste treatment, exposes radioactive waste to temperatures above 1400 °C, thereby substantially reducing its volume. In the planning and managing 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 centres, thereby improving radioactive waste management. In this study, a thermal plasma treatment process was established, and a plasma reactor was used for compactable waste processing. After 30 min of thermal plasma treatment, the volume reduction factor reached 1:99. The results demonstrate the viability of using a thermal plasma process for the volumetric reduction of radioactive waste in a safe and cost-effective manner.Artigo IPEN-doc 26215 Retrieval and conditioning of radium sources-containing package in Panama2019 - MOURÃO, ROGERIO P.; SILVA, EDSON P. da; FERREIRA, MARCIO D.C.; POTIENS JUNIOR, ADEMAR J.A team of CNEN experts successfully conducted an operation in Panama to recover and condition disused radioactive sources stored in an unsafe condition. The sources, containing the Ra-226 isotope, were used in the past to treat tumors using the technique known as brachytherapy and were immobilized in a complex package buried in an old hospital wing destined for demolition. The compartment where the package stayed for decades, built under the floor of a hospital laboratory, was contaminated with radon and daughters, including Pb-210, responsible for the contamination found. The operation consisted of extracting the package from this compartment, placing it in a cylindrical metal overpack, transporting it to the temporary storage site and carry out site decontamination. Besides the package with the sources, three 200L drums containing contaminated debris from the demolition of walls and floor were generated. No relevant event of radiological protection, such as occupational dose above the established limits, contamination of personnel or place, etc, was observed. The package produced, together with those containing the contaminated debris, was transferred to the facilities of the National Oncology Institute.Resumo IPEN-doc 21480 Caracterização primária de rejeitos radioativos líquidos da GRR2015 - COUVO, NATHALIA da S.; POTIENS JUNIOR, ADEMAR J.Artigo IPEN-doc 21242 A new storage facility for institutional radioactive wastes at IPEN2015 - VICENTE, ROBERTO; DELLAMANO, JOSE C.; POTIENS JUNIOR, ADEMAR J.IPEN, the Nuclear and Energy Research Institute in Sao Paulo, Brazil, has been managing the radioactive wastes generated in its own activities of research and radioisotope production as well as those received from many radioisotope users in the country since its start up in 1958. Final disposal options are presently unavailable for the wastes that cannot be managed by release after decay. Treated and untreated wastes including disused sealed radioactive sources and solid and liquid wastes containing radionuclides of the uranium and thorium series or fission and activation products are among the categories that are under safe and secure storage. This paper discusses the aspects considered in the design and describes the startup of a new storage facility for these wastes.Resumo IPEN-doc 20654 Water-equivalent solid sources prepared by means of two distinct methods2014 - KOSKINAS, MARINA F.; YAMAZAKI, IONE M.; POTIENS JUNIOR, ADEMAR; LIMA, JOSENILSON B. de; DIAS, MAURO S.Artigo IPEN-doc 19386 Implementation of a computerized system for the management of radioactive lightning rods and smoke detectors2013 - NASCIMENTO, RAFAEL A. do; DELLAMANO, JOSE C.; POTIENS JUNIOR, ADEMAR J.Artigo IPEN-doc 19397 Monte Carlo method to characterize radioactive waste drums2013 - LIMA, JOSENILSON B.; DELLAMANO, JOSE C.; POTIENS JUNIOR, ADEMAR J.Artigo IPEN-doc 15454 Gestao de rejeitos radioativos no IPEN - 25 anos de historia2006 - DELLAMANO, JOSE C.; VICENTE, ROBERTO; MARUMO, JULIO T.; POTIENS JUNIOR, ADEMAR J.; MIYAMOTO, HISSAE; HIROMOTO, GOROArtigo IPEN-doc 06198 Avaliacao do programa de bioanalise para iodo-1311997 - GABURO, J.C.G.; TODO, A.S.; POTIENS JUNIOR, A.J.; OLIVEIRA, E.M.; SORDI, G.M.A.A.Artigo IPEN-doc 06195 Proposta de um modelo de incorporacao para trabalhadores ocupacionais do IPEN-CNEN/SP que manuseiam sup(131)I1997 - TODO, A.S.; POTIENS JUNIOR, A.J.; GABURO, J.C.G.; SANCHES, M.P.; OLIVEIRA, E.M.