Um método proativo para gerenciamento da segurança em instalações nucleares

Submitted by Vanessa Silva ([email protected]) on 2017-05-17T19:07:12Z No. of bitstreams: 1 Um método proativo para gerenciamento da segurança em instalações nucleares.pdf: 191194 bytes, checksum: 709c4f42dd5a7b49084f51519c822303 (MD5)Made available in DSpace on 2017-05-17T19:07:12Z (GMT). No. of bitstreams: 1 Um método proativo para gerenciamento da segurança em instalações nucleares.pdf: 191194 bytes, checksum: 709c4f42dd5a7b49084f51519c822303 (MD5)Em razão da abordagem moderna para tratar a segurança em instalações nucleares que destaca que estas organizações devem ser capazes de avaliar e gerenciar de forma proativa suas atividades torna-se cada vez mais importante a necessidade de instrumentos de avaliação das condições de trabalho. Nesse contexto, este trabalho apresenta um método proativo de gerenciamento da segurança organizacional, o qual apresenta três características inovadoras: 1) a utilização de indicadores preditivos que fornecem informações atuais sobre o desempenho das atividades, permitindo ações preventivas e não somente reativas na gestão da segurança, diferente dos indicadores de segurança tradicionalmente utilizados (indicadores reativos) que são obtidos após a ocorrência de eventos indesejados; 2) a adoção do enfoque da engenharia de resiliência no desenvolvimento dos indicadores – os indicadores são baseados em seis princípios da engenharia de resiliência: comprometimento da alta direção, aprendizagem, flexibilidade, consciência, cultura de justiça e preparação para os problemas; 3) a adoção dos conceitos e propriedades da teoria dos conjuntos fuzzy para lidar com a subjetividade e a consistência dos julgamentos humanos na avaliação dos indicadores. A teoria fuzzy é usada essencialmente para mapear modelos qualitativos de tomada de decisão, e para métodos de representação imprecisa. Os resultados deste trabalho objetivam uma melhoria no desempenho e na segurança nas organizações. O método foi aplicado no setor de expedição de radiofármacos de uma instalação nuclear. Os resultados mostraram que o método é uma boa ferramenta de monitoramento de forma objetiva e proativa das condições de trabalho de um domínio organizacional

Cartographical Data Treatment Analysis for Real Time Three-Dimensional Terrain Visualization

Abstract. The real time three-dimensional terrain visualization is associated to several characteristics, such as the video board exhibition. Moreover, the representation of a virtual scene is carried out through compositions of triangles that together confer a three-dimensional aspect to the scene. The available details in this scene are directly related to the number of triangles amount used in its representation, what may become impeditive to applications like computer visualization. This article presents techniques for cartographic data processing, in order to use them these data in a real time three-dimensional terrain visualization system. Resumo. A visualização tridimensional de terrenos em tempo real está associada a diversas características, entre elas, a capacidade de exibição das placas de vídeo. Além disto, a representação de um cenário virtual é realizada através de composições de triângulos que juntos conferem um aspecto tridimensional à cena. A riqueza de detalhes presentes neste cenário está diretamente relacionada à quantidade de triângulos utilizados em sua representação, o que muitas vezes torna impeditivo seu emprego em aplicações desta natureza. Este artigo apresenta técnicas de processamento de dados cartográficos, de modo a empregá-los em um sistema de visualização tridimensional de terrenos em tempo real. 1

EMERGENCY CONTROL ROOM DESIGN OF A NUCLEAR REACTOR USED TO PRODUCE RADIOISOTOPE

Submitted by Vanessa Silva ([email protected]) on 2017-05-24T17:24:26Z No. of bitstreams: 1 EMERGENCY CONTROL ROOM DESIGN OF A NUCLEAR REACTOR USED TO PRODUCE RADIOISOTOPE.pdf: 384900 bytes, checksum: 082a02a0d1a86867e625532bf9a8e099 (MD5)Made available in DSpace on 2017-05-24T17:24:26Z (GMT). No. of bitstreams: 1 EMERGENCY CONTROL ROOM DESIGN OF A NUCLEAR REACTOR USED TO PRODUCE RADIOISOTOPE.pdf: 384900 bytes, checksum: 082a02a0d1a86867e625532bf9a8e099 (MD5) Previous issue date: 2015A control room is defined as a functional entity with an associated physical structure, where the operators carry out the centralized control, monitoring and administrative responsibilities. Emergency control room acts as an alternative control room for the purpose of shutting down or maintaining the facility in a safe shutdown state when the main control room is uninhabitable. The mission of emergency control room is to provide the resources to bring the plant to a safe shutdown condition after an evacuation of the main control room. An evacuation of the main control room is assumed when there is no possibility to accomplish tasks involved in the shutdown except reactor trip. The purpose of this paper is to present a specific approach for the design of the emergency control room of a nuclear reactor used to produce radioisotope. The approach is based on human factors standards and the participation of a multidisciplinary team in the development phase of the design. Using the information gathered from standards and from the multidisciplinary team a 3D Sketch and a 3D printing of the emergency control room were created

MOTION-BASED SIDE-INFORMATION GENERATION FOR A SCALABLE WYNER-ZIV VIDEO CODER

A motion-based side-information generation scheme with semi super-resolution for a scalable Wyner-Ziv coder framework is introduced. It is known that the performance of any Wyner-Ziv coder is heavily dependent on the efficiency of the side-information generation. We propose an iterative block based scheme to generate a semi super-resolution frame using the past and future reference frames which should be coded at full-resolution. To enable this side-information generation the framework should allow for low encoding complexity, reducing the spatial resolution only in the non-reference frames. The enhancement layer is produced using a residual frame of the reduced resolution encoded frame. The decoder first decodes the low resolution base layer and iteratively generates the side-information, along with channel decoding, to obtain a higher quality version of the decoded frame. Results of the implementation of the framework using the motion-based side-information in the H.263+ and H.264 standards are presented. Index Terms — Distributed video coding, side-information generation, reversed-complexity, scalable video coding

Objetivos e programa do Instituto de Engenharia Nuclear

Submitted by Marcele Costal de Castro ([email protected]) on 2019-08-07T14:58:09Z No. of bitstreams: 0Made available in DSpace on 2019-08-07T14:58:09Z (GMT). No. of bitstreams: 0Apresenta as atividades planejadas inicialmente para o Instituto de Engenharia Nuclear, incluindo sua Divisão de Reatores, sua Divisão de Física Nuclear, quadro de pessoal, organização, programa e orçamento

A SIMULATION STUDY OF ADAPTIVE FILTERING APPLIED TO MLSE-PSP RECEIVERS

In this paper we address adaptive maximumlikelihood sequence estimation using per survivor processing (MLSE-PSP) over frequency selective fast fading channels. Special care is dedicated to the choice of the adaptive filtering algorithm (AFA) used in these schemes and its injluence on the receiver bit error rate (BER) pe~ormance. We try an in-depth investigation of LMS and KF performance in the MLSE-PSP context. Regarding the KF algorithm, we focus attention on statistical channel models and propose the use of a second-order autoregressive (AR(2)) modeling as an alternative to the jirst-order autoregressive (AR(l)) modeling, which has been adopted in other works [1][2]. The performance of MLSE-PSP schemes is extensivel

Elaboração e análise de curva de eluição de Na123I para utilização na síntese da 123I-metaiodobenzilguanidina

Submitted by Marcele Costal de Castro ([email protected]) on 2018-04-19T13:46:05Z No. of bitstreams: 1 RT-IEN-05-2005.pdf: 92898 bytes, checksum: 24a058bc314901930027d229613d4943 (MD5)Made available in DSpace on 2018-04-19T13:46:05Z (GMT). No. of bitstreams: 1 RT-IEN-05-2005.pdf: 92898 bytes, checksum: 24a058bc314901930027d229613d4943 (MD5) Previous issue date: 2005-12Uma curva de eluição de 123 Na foi elaborada para determinar o mínimo volume de eluição que contém a maior concentração radioativa deste radioisótopo. A concentração radioativa de 123I deve ser a mais alta possível afim de evitar perdas de 123I na marcação da 123I-metaiodobenzilguanidina, 123I-MIBG, durante a etapa de aquecimento

Development of an emulator for tomographic images generated by radiation transmission

Submitted by Marcele Costal de Castro ([email protected]) on 2018-04-12T18:44:14Z No. of bitstreams: 1 RT-IEN-08-2003.pdf: 2607313 bytes, checksum: 7eeb3bdf8f90e417700ba33d3393fe0a (MD5)Made available in DSpace on 2018-04-12T18:44:14Z (GMT). No. of bitstreams: 1 RT-IEN-08-2003.pdf: 2607313 bytes, checksum: 7eeb3bdf8f90e417700ba33d3393fe0a (MD5) Previous issue date: 2003-09A computer program to emulate tomographic images generated by radiation transmission has been developed. The algorithm uses a deterministic approach, to generate the projections which are the supplied to an existing image reconstruction software. A dispersion related to the counting statistics, is also incorporated to the algorithm to simulate the influence of the detector efficiency and counting time on the quality of the final image. The detector resolution is as well included in the algorithm, by assuming a Gaussian shape for its line spread function – LSF. The program deals with cylindrical samples containing any desired number of cylindrical rods inside them, requiring their positions, dimensions and attenuation properties as input data. Some images taken with a thermal neutron tomograph equipped with a position sensitive detector have been compared with those emulated by the developed program

THE USE OF CFD APPLIED TO STUDIES OF VENTILATION IN URBAN

The aim of this work is to discuss the effect of urban block and lot design in natural ventilation of selfbuilt houses in the city of Campinas, Brazil. The research was carried out with CFD simulation, using the software PHOENICS to calculate air velocities in the external regions of the residences. The case study was a surrounding in the city, the settlement São José, which was urbanized by the public organs having in mind low-income self-builders. The houses were analyzed through results of two surveys: one in the years 2000, which characterized the self-built houses, and the second one in 2005, to verify the modifications and their consequences in the environmental performance of the houses. Results show that poor natural ventilation is due to the lack of information about the prevailing winds, orientation problems and the modifications carried out by the self-builders

SECURITY CONSTRAINED OPTIMAL ACTIVE POWER FLOW VIA NETWORK MODEL AND INTERIOR POINT METHOD

This paper presents a new formulation for the security constrained optimal active power flow problem which enables the representation of three basic constraints: branch outage, generator outage and multiple equipment congestion. It consists of a network model with additional linear equality and inequality constraints and quadratic separable objective function, which is efficiently solved by a predictor-corrector interior point method. Sparsity techniques are used to exploit the matricial structure of the problem.Case studies with a 3,535bus and a 4,238-branch Brazilian power system are presented and discussed, to demonstrate that the proposed model can be efficiently solved by an interior point method, providing security constrained solutions in a reasonable time. Artigo submetido em 04/06/2008 (Id.: 00877