Antônio Carlos de Abreu Mol

Antônio Carlos de Abreu Mol
Nuclear Engineering Institute | IEN · DICH

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66
Publications
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651
Citations

Publications

Publications (66)
Article
The reloading of a nuclear power plant is a procedure that becomes necessary whenever the energy produced by the fuel assemblies’ burnup is not sufficient to keep the plant working at its full power, which means an interruption on the production of energy. The longer is the time spent on performing the reloading, the higher is the loss of money. Du...
Article
Full-text available
This paper describes a design of a collaborative virtual environment (CVE) for training security agents in big events. The CVE was modelled with Autodesk 3ds Max, while Unity 3D was used to create the terrain and implement the features that make up a virtual environment. The Brazilian soccer stadium known as Maracanã and its surroundings were chose...
Article
Some of the procedures referred to nuclear issues like evacuation training, waste management and radioactive dose assessment evaluation are related to dangerous situations where the health of the involved personnel can be compromised. For this reason, several researchers have been proposing the use of virtual reality techniques to help on performin...
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This paper describes a Collaborative Virtual Environment (CVE) for training and assessment of collaboration among agents who deal with radiological and nuclear emergency situations at big events. For modelling the virtual environment we used Unity software for the land creation, and Autodesk 3ds Max for the scenery and objects. We include in the Un...
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The objective of this work is to develop a virtual detection tool of radioactive sources, such as to facilitate and assist the training and nuclear security planning. To accomplish this tool was created a virtual model of the Nuclear Engineering Institute (IEN) with virtual characters (avatars), able to move and interact with the environment, radia...
Conference Paper
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With Brazil facing a prospect of expanding its nuclear-energy sources and the development of new nuclear techniques there is a need for imminent integration in the nuclear industry with the tool information. In this paper we propose the creation of a program aimed at the servers of the institutions that make up the Brazilian Nuclear Sector, with a...
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Accident diagnosis in nuclear power plants (NPPs) is a very hard task for plant operators due the number of variables they have to deal simultaneously when facing accident situations. The previous identification of possible accident situations is an essential issue for safe operation in NPPs. Artificial intelligence techniques and tools are suitabl...
Conference Paper
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RESUMO Com o Brasil diante de uma perspectiva de ampliação de sua matriz núcleo-energética e do desenvolvimento de novas técnicas nucleares há uma necessidade de integração iminente no setor nuclear, tendo como ferramenta a informação. No presente trabalho propõe-se a criação de um programa, voltado para os servidores das instituições que compõe o...
Article
The Brazilian nuclear program has reinforced the importance of improving the physical security of nuclear facilities located in this country. Thus, the present work proposes the development of a new tool that allows the user to make interactions inside a virtual environment, which simulates the nuclear facility's structure, in order to aid on plann...
Article
One of the biggest challenges in the nuclear area are still nuclear radioactive waste generated in the various applications of this energy, all these wastes are stored in tanks that are frequently monitored and restructured to better utilization of the same. Considering the routine process of this work and due to the seriousness of the issue, are v...
Conference Paper
This work describes improvements in a surveillance system for safety purpose in nuclear plants. The objective is to track people in video, online, to estimate the dose received by personnel, during working tasks executed in nuclear plants. The estimation will be based on their tracked positions and on dose rate mapping in a real nuclear plant at In...
Article
This research deals with the virtual modeling and ergonomic evaluation of a PWR NPP control room, aiming specially with the assessing of the elapsed times spent by operators to control such safe-critical system. Secure Nuclear power plant (NPP) operation involves using guidelines that specify procedures to be followed by personnel. Control rooms' e...
Conference Paper
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This paper reports results achieved in a development for a virtual control desk, interfacing with a nuclear power plant's control system. This virtual control desk was developed aiming to combine the dynamics simulation of a nuclear power plant operation, with high fidelity control desk's visual appearance. Natural interfacing techniques where used...
Conference Paper
Nuclear energy suits many applications to the society. However, nuclear energy has been understood by population in a negative way. Thus, this work's objective is to promote nuclear energy's applications, in particular towards high school students, using 3D movies. Educational videos can enhance the information transmission, making it more didactic...
Article
Hospitals nuclear pharmacies are sectors related to research, education and assistance of pharmacists and physicians, specially the ones who work with nuclear pharmacy. The education in nuclear pharmacy is one of the most important aspects in this field. Due to the hard conditions in operating nuclear pharmacies (i.e. dose exposition, radiation pro...
Article
This article presents a new automatic identification technique of structural failures in nuclear green fuel pellet. This technique was developed to identify failures occurred during the fabrication process. It is based on a smart image analysis technique for automatic identification of the failures on uranium oxide pellets used as fuel in PWR nucle...
Conference Paper
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In this paper we present a new library for thermodynamic evaluation of water properties, THEWASP. This library consists of a C++ and CUDA[13] based programs used to accelerate a function evaluation using GPU and GPU clusters. Global optimization problems need thousands of evaluations of the objective functions to find the global optimum implying in...
Conference Paper
Full-text available
This paper reports the recent results achieved in a research and development for a virtual control desk, interfacing with a nuclear power plant's control system. This virtual control desk was developed aiming to combine the dynamics simulation of a nuclear power plant operation, with high fidelity control desk's visual appearance. Thus, users can b...
Article
Due to the high safety requirements for nuclear power plant operation, control desks must be designed in such a way operators can take all the procedures safely, with a good overview of all variable indicators and easy access to actuator controls. Also, operators must see alarms indication in a way they can easily identify any abnormal conditions a...
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Transient identification in nuclear power plants (NPP) is often a computational very hard task and may involve a great amount of human cognition. The early identification of unexpected departures from steady state behavior is an essential step for the operation, control and accident management in NPPs. The bases for the transient identification rel...
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Graphics Processing Units (GPU) are high performance co-processors originally intended to improve the use and quality of computer graphics applications. Since researchers and practitioners realized the potential of using GPU for general purpose, their application has been extended to other fields out of computer graphics scope. The main objective o...
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This paper reports the most recent development results of a simulation tool for assessment of radiation dose exposition by nuclear plant’s personnel, using artificial intelligence and virtual reality technologies. The main purpose of this tool is to support training of nuclear plants’ personnel, to optimize working tasks for minimisation of receive...
Conference Paper
This paper reports the use of virtual simulation that aims at training personnel for preparedness and counteraction in emergency and security threats. A low-cost platform for virtual simulation has been reused, taking advantage of important features already implemented in this platform. A virtual nuclear site is simulated considering some hypotheti...
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This work presents a Particle Swarm Optimization (PSO) approach for non-periodic preventive maintenance scheduling optimization. The probabilistic model, which is focused on reliability and cost evaluation, is developed in such a way that flexible intervals between maintenance interventions are allowed. Due to the fact that PSO is typically skilled...
Article
This work reports the development of a human-system interface based on automatic speech recognition, and its integration to a virtual nuclear power plant control desk under development. The later is aimed to reproduce a nuclear power plant's control desk using virtual reality technology, for operator training and ergonomic evaluation purposes. Init...
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Resumen Es necesario identificar los diferentes tipos de peligros, así como sus causas, probabilidades y consecuencias de los mismos, dentro de plantas, industrias y cualquier proceso para clasificar los riesgos. Este trabajo se enfoca en particular a un estudio utilizando la técnica HAZOP (Hazard and Operability) para una planta de reformado de me...
Article
This paper reports the use of nuclear plant’s simulation for online dose rate monitoring and dose assessment for personnel, using virtual reality technology. The platform used for virtual simulation was adapted from a low cost game engine, taking advantage of all its image rendering capabilities, as well as the physics for movement and collision, a...
Article
This work reports results obtained with the use of a game engine as a tool to create and to navigate in virtual environments, to perform simulations and training of workers in risky areas, for safety purposes. The game engine used can be used for non-commercial and educational purposes, and its source code is available for users. Thus, the engine c...
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A nuclear control room is a complex system that controls a thermodynamic process, where the operators interact with systems and human-system interfaces that have significant implications for the nuclear plant safety. This paper presents a case study in which an evaluation using a questionnaire, based on human factors guidelines, has been applied in...
Conference Paper
This work reports results obtained with the use of a game engine as a virtual simulation tool for dose assessment in nuclear plants, using on-line measurements. Since the game engine used has networking capabilities, measurement data is collected from real radiation monitors installed in a nuclear plant, to represent the radiation dose rate in pre-...
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Current nuclear power plant simulators employ interfaces that use multiple computer displays to represent a simplified control desk. To make the simulation more realistic and effective, a proposed approach replaces the displays with a virtual control desk that precisely mimics the original.
Article
A game engine is applied to virtual simulations of emergency evacuation from a modeled building of Brazil's Nuclear Engineering Institute (IEN). Researchers tested evacuation scenarios to compare the virtual simulations to real simulations using real people in the real building. The results compared favorably and provide a basis for further experim...
Conference Paper
Operators in nuclear plants receive radiation doses during several different operation procedures. A training program capable of simulating these operation scenarios will be useful in several ways, helping the planning of operational procedures so as to reduce the doses received by workers, and to minimize operations' times. It can provide safe vir...
Conference Paper
Full-text available
This work makes use of Virtual Reality technology to disseminate medical applications of nuclear energy, with educational purposes. Virtual Reality is an effective learning tool, since navigation and interaction in virtual worlds can improve motivation in the learning process. With this technology, learning can be achieved in a clearer, joyful and...
Article
This paper presents two approaches based on different artificial intelligence techniques (AI), genetic algorithms (GA) and neural networks (NN), for pattern recognition on the set of transient reactor signals. The first approach describes a possibilistic analysis based on the minimum centroids set method optimized by genetic algorithm. The use of a...
Article
This work presents an approach for neural network based transient identification which allows either dynamic identification or a “don't know” response. The approach uses two “jump” multilayer neural networks (NN) trained with the backpropagation algorithm. The “jump” network is used because it is useful to dealing with very complex patterns, which...
Article
In this paper, a method for preventive maintenance scheduling optimization of standby systems, based on genetic algorithm and probabilistic safety analysis, is described. The goal of this approach is to improve the average availability of the system through the optimization of the preventive maintenance policy. Here, the genetic modeling propitiate...
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Full-text available
The Human-System Interfaces (HSIs) are important parts of an industrial plant in which the operator interact to carry through its functions and tasks. The HSIs manly include alarms, displays of information and controls. The development and evaluation of HSIs for control rooms is one of research area at the Human-System Interface Laboratory (LABIHS)...
Article
Full-text available
RESUMO Nos últimos anos, diferentes métodos baseados em Redes Reurais Artificiais (RNA) tem sido propostos para identificação de transientes em usinas nucleares. Alguns desses trabalhos focam a identificação dinâmica usando redes neurais recorrentes, contudo, elas não são aptas a trabalharem com eventos desconhecidos. Outro tipo de solução usa apre...

Projects

Project (1)
Project
Criar mecanismos para integração de dados e informações sobre as pesquisas desenvolvidas nas diversas unidades de pesquisa da CNEN