Brazilian Cnen
Mostrando 1-12 de 12 artigos, teses e dissertações.
-
1. Evaluation of radiation protection conditions in intraoral radiology
Abstract Introduction: The dental radiology represents about 20% of human exposure to radiation in radio diagnostic. Although the doses practiced in intraoral dentistry are considered low, they should not be ignored due to the volume of the performed procedures. This study presents the radiation protection conditions for intraoral radiology in Curitiba - PR
Res. Biomed. Eng.. Publicado em: 17/05/2016
-
2. Procedimento de fabricação de elementos combustível a base de dispersão com alta concentração de urânio / Fabrication procedures for manufacturing high uranium concentration dispersion fuel elements
IPEN-CNEN/SP developed the technology to produce the dispersion type fuel elements for research reactors and made it available for routine production. Today, the fuel produced in IPEN-CNEN/SP is limited to the uranium concentration of 3.0 gU/cm3 for U3Si2-Al dispersion-based and 2.3 gU/cm3 for U3O8-Al dispersion. The increase of uranium concentration in fuel
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/11/2011
-
3. Automação do processo de soldagem a laser (Nd:YAG) para confecção das sementes de Iodo-125 utilizadas em braquiterapia / Development of an automation system for iodine-125 brachytherapy seed production by (Nd:YAG) laser welding
The aim of this work is to develop an automation system for iodine-125 radioactive seed production by (Nd:YAG) laser welding, which has been used successfully in Low Dose Rate (LDR) brachytherapy treatment. This small seed consists of a welded titanium capsule, with 0.8mm in diameter and 4.5mm in length, containing iodine-125 adsorbed onto a silver rod. The
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/09/2010
-
4. Proposal of implementation of environmental management system the laboratory of radioactive waste in IPEN-SP / Proposta de implantação de um sistema de gestão ambiental no laboratório de rejeitos radioativos do IPEN-SP
Constata-se, atualmente, um uso crescente da energia nuclear no Brasil, para geração de eletricidade e outras aplicações (na medicina, na indústria, em agricultura, em técnicas ambientais, em radio-esterilização). Na realização das atividades de pesquisa do ciclo do combustível nuclear, em outras atividades de pesquisa, nas atividades industriais
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/03/2008
-
5. Análise de requisitos normativos para o desenvolvimento e a implementação de um sistema de gestão da qualidade em instalações e atividades nucleares brasileiras / Analysis of normative requirements for the development and implementation of a quality management system in Brazilian nuclear installations and activities
The present work identifies, characterizes and analyses the normative requirements for the development and implementation of quality management systems in Brazilian nuclear installations and activities. The requirements established in standards IAEA GS-R-3, IAEA GS-G-3.1, IAEA DS 349, NBR ISO 9001:2000 e CNEN-NN-1.16 are critically analyzed. A correlation ma
Publicado em: 2008
-
6. Caracterização físico-química de materiais baseados em celulose
Switching cutout devices are electrical circuit breakers which protect electric power distribution webs against lightning discharges. Switching cutout devices main parts are the fuse links in which a fuse element, a special metallic alloy, melts due to the generated heat when struck by electric discharges. When such melting occurs, and the breaker opens, an
Publicado em: 2008
-
7. Estudo de sorção de césio e estrôncio em argilas nacionais para sua utilização como barreira em repositórios de rejeitos radioativos / Study of cesium and strontium sorption in brazilian clays for their use as a barrier in repositories of radioactive wastes
Wastes in general should be properly treated and stored. Then the radioactive wastes also rquire suitable and safe management beginning in their generation until the storage in repository. The main purpose of the radioactive waste management is to preserve the human beings and the environment. The objective of this research ws to characterize some brasilian
Publicado em: 2007
-
8. Criação de um banco de dados dinâmico e análise de medições Lidar em formato Web do Laboratório de Aplicações Ambientais a Laser do Instituto de Pesquisas Energéticas e Nucleares / Creation of a dynamic database and analysis of LIDAR measurements in web format at the laboratory of environmental laser applications at the Nuclear and Energy Research Institute
O Laboratório de Aplicações Ambientais a Laser, situado no Centro de Lasers e Aplicações no IPEN (Instituto de Pesquisas Energéticas e Nucleares), efetua medidas das concentrações de aerossóis atmosféricos, enviando um feixe de laser à atmosfera e coletando a luz retroespalhada. Tal sistema fornece um grande número de parâmetros físicos que dev
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/06/2006
-
9. AplicaÃÃo da citogenÃtica na avaliaÃÃo da radioproteÃÃo de traumatologistas do Recife / Application of cytogenetics for evaluating radioprotection conditions of traumatologists in Recife
Among the activities involving the application of ionizing radiation in medicine, fluoroscopic procedures correspond to the major source of irradiation to doctors. Fluoroscopy consists of X-ray equipment coupled with an image intensifier. This methodology permits a real time visualization of interior of the patientâs body during a surgery. A recent study pe
Publicado em: 2006
-
10. UtilizaÃÃo do dosÃmetro Fricke para dosimetria de mÃquinas teleterapÃuticas, irradiadores gammacel e aparelhos de raios-X superficiais
The chemical dosimetry has been used as a reference in the measurement of the absorbed dose, with the Fricke dosimeter, at standardization laboratories. This dosimeter is considered an absolute dosimetric standard for measurements of radiation doses ranging from 20 to 400 Gy, covering a wide energy spectrum, from X-ray, g-ray to fast electron beam. The objec
Publicado em: 2006
-
11. Evaluation of the waste profile from (medical) health services of Belo Horizonte concerned to the presence of radioactive wastes in the disposal system / Avaliação do perfil dos resíduos de serviços de saúde de Belo Horizonte quanto à presença de rejeitos radioativos na destinação final
The medical procedures of diagnosis and treatment that use radiopharmaceuticals generate radioactive wastes that can, after reaching the release limit, follow the conventional ways of collection and disposal of the urban solid wastes. This research aims to detect radiometrically the presence of radioactive wastes in the health-care wastes at the final dispos
Publicado em: 2005
-
12. PROGRAMAÇÃO HIPERBÓLICA EM VARIÁVEIS 0-1 E OTIMIZAÇÃO DE CONSULTAS A BANCOS DE DADOS BIBLIOGRAFICOS / HIPERBOLIC PROGRAMMING IN 0-1 VARIABLES AND BIBLIOGRAPHIC DATABASES SEARCH OPTIMIZATION
In this work we study the solution of problems arising in the field of queries optimization in information retrieval from classical databases, through their formulation as mathematical problems in 0-1 variables. The first problem studied is the hyperbolic programming problem in 0-1 variables, for which we developed exact linear-time algorithms. The second pr
Publicado em: 1988