DEMERVAL LEONIDAS RODRIGUES

DEMERVAL LEONIDAS RODRIGUES

(Fonte: Lattes)

Resumo

Master's at Nuclear Engineering from Universidade de São Paulo (2002) and ph.d. at Nuclear Engineering from Universidade de São Paulo (2009). Has experience in Nuclear Engineering, focusing on Radiological Protection. (Text obtained from the Currículo Lattes on October 8th 2021)

Possui mestrado em Tecnologia Nuclear pela Universidade de São Paulo (2002) e doutorado em Tecnologia Nuclear pela Universidade de São Paulo (2009). Atualmente é gerente de Radioproteção do Instituto de Pesquisas Energéticas e Nucleares, da Comissão Nacional de Energia Nuclear. Tem experiência na área de Engenharia Nuclear, com ênfase em Radioproteção Ocupacional, Transporte de Materiais Radioativos e Emergências Radiológicas e Nucleares. (Texto extraído do Currículo Lattes em 08 out. 2021)

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Digital technology tools to improve professional development in brazilian radioactive facilities
2022 - LEVY, D.; SORDI, G.M.A.A.; RODRIGUES, D.L.; CARNEIRO, J.C.G.G.
This article focuses on digital technology tools to improve workers' skills in Brazilian radioactive facilities. Uniprorad is a web-based system designed to improve the global communication about radiological protection in this very large country, where it is a strong challenge to ensure high quality professional information to as many people as possible. This article presents the authors' experience in the communication of radiological protection and the evolution of this web-based system. Created in 2013, the system Uniprorad is constantly updated to offer a complete web-based repository in Portuguese for research, consultation and information. The content presents discussions related to optimization (since 2013), monitoring (developed in 2015), potential exposure (since 2017) and communication on occupational risk agents in the workplace (started in 2019). Regarding risk agents in the workplace, the content has been developed to teach the identification and evaluation of the various risk agents (physical, chemical biological and ergonomic) and their association to ionizing radiation. In addition, to concepts, definitions and theory, the Project Uniprorad counts on interactive exercises, about radiological protection taking into account.the best practices for radioactive facilities in order to meet both national standards and international recommendations. The aim of this paper is to provide a critical review of the evolutions of this web-based system to outreach this target audience, and to assist other experts on planning and implementing effective strategies to communicate radiological protection. The results of this experience support the idea that in a rapid-changing world it is a must to invest in constant innovations to improve professional development.
Resultados do sistema de averiguação de ocorrências no estado de São Paulo no período de 2011 a 2021
2022 - SUZUKI, F.F.; NORMANTON, K.A.F.; RODRIGUES, D.L.; GERULIS, E.
Communication about occupational exposure
2019 - LEVY, DENISE S.; SORDI, GIAN M.A.A.; RODRIGUES, DEMERVAL L.; CARNEIRO, JANETE C.G.G.
Brazil is the largest country of Latin America, with 8.5 million square kilometers divided into five regions with 3 time zones. In this large between-country distances, with plenty of radioactive facilities throughout the country, professional education and communication is a must and a challenge. This paper discusses a web-based project designed to provide effective communication about occupational exposure, linking geographically distant workers to high-quality reliable information. The web-based-project UNIPRORAD counts on concepts, definitions and theory about radiological protection based on both national and international standards, guidelines and recommendations. The content includes optimization, monitoring, potential exposure and communication on occupational risk agents in the workplace. Regarding potential exposures, it is essential to consider the concept of “risk” which, even among scientific community, seems to assume a great variety of meanings. Regarding risk agents in the workplace, it is necessary to discuss the identification and evaluation of the various risk agents (physical, chemical biological and ergonomic) addressing attention to their association to ionizing radiation. This article presentsthe authors' experience in the communication of radiological protection in Brazil, presenting global and specific issues on radiological protection, analyzing recommendations and discussing discrepancies among the several valid publications. It is our objective the dissemination of trustful updated communication, providing radioactive facilities relevant, accurate and understandable information. Finally, the article emphasizes the need to spread information wherever it is needed to inform as many people as possible, contributing to develop workers´ professional skills and to improve safety culture in workplace.
Basic characterization of a radioactive facility and evaluation of risk agents
2016 - CARNEIRO, J.C.G.G.; ALVES, A.S.; SANCHES, M.P.; RODRIGUES, D.L.; LEVY, D.S.; SORDI, G.M.A.A.
This is an exploratory and descriptive study with qualitative and quantitative approaches to investigate the basic characterization of a Brazilian radioisotope production facility through ample knowledge of the workplace, workforce, task performed and identification of present risk agents in labor environment. The studied sample was composed by 102 workers distributed in eight work processes. Data were collected from April 2013 to July 2014 by applying questionnaire forms and complemented by interviews and observations. The descriptive statistical analysis included ANOVA test and non-parametric tests, among others. For the purpose of this study, there was adopted a significance level of 5% (p<0.05). The analysis of socio-demographic variables demonstrated that male gender predominated in total sample (74.5%) and the mean age of the workers was (51.8 ± 1.7) years. The largest percentage of the responders (70.6%) was technician-level workers. Regarding task-related exposure, there was considered that all groups presented the same exposure profile. At the workplace, there were identified 17 risk agents, including physical, chemical, biological, ergonomic and accident risks. The workforce was categorized into 3 risk groups according to relative frequency distribution of the occupational risks. Among the sixteen qualitative variables studied at the workplace, only three of them did not demonstrate relative frequency. The only variable that showed association with the three risk groups was the possibility of the contact with ionizing radiation. The study provided an overview of the perception of occupational risk at the facility. According to the results obtained by statistical analysis, most of the qualitative variables presented statistically significant association (p<0.001) related to the occurrence of occupational risks. Even though the workers may be potentially exposed to different risk agents, the ionizing radiation was the main physical risk factor observed in this facility.
Enhancing communication on Radiological Protection throughout Brazil
2016 - LEVY, DENISE S.; SORDI, GIAN M.A.A.; RODRIGUES, DEMERVAL L.; CARNEIRO, JANETE C.G.
This paper focus on the potential value of Information and Communication Technologies (ICTs) to enhance communication on Radiological Protection throughout Brazil. The servers processing power added to the technology of relational databases allow to integrate information from different sources, enabling complex queries with reduced response time. It is our objective to provide radioactive facilities a complete repository for research, consultation and information on radiological protection in an integrated and efficient way. This webbased project works informatization of Radiological Protection Programs according to the positive tree published by AIEA in its Safety Series No. 102, the most generic and complete tree for an appropriate and effective radiation protection program. Up to this moment, the website counts on concepts, definitions and theory about optimization and monitoring procedures, interrelating information, currently scattered in various publications, in order to meet both Brazilian and international recommendations. The project involves not only the collection and interrelationship of existing information in the several publications, but also new approaches from some recommendations, such as potential exposures. Only few publications develop expressively the issue and, even though they provide fundamental theory, there is still lack of knowledge of failure probabilities, which currently constitutes a broad research field in radiological protection. This research proposes the development of fault trees and the analysis of different scenarios, suggesting paths to quantify probabilistically the occurrence of potential exposures, as well as probabilities to reach a certain level of dose. It is our target to complete the system in a near future, including other relevant issues, such as safe transport of radioactive materials, emergency response, radioactive waste management and decommissioning, among others. We believe the use of information technology for the radiological protection programs shall contribute greatly to provide information to Brazilian radioactive facilities throughout the country, spreading information to as many people as possible, minimizing geographic distances and stimulating communication and development.
Information and communication technologies for appropriate communication in the workplace
2018 - LEVY, D.S.; SORDI, G.M.A.A.; RODRIGUES, D.L.; CARNEIRO, J.C.G.
Brazil is one of the 5th largest countries on earth. It is geopolitically divided into five regions, with large between-country distances and plenty of radioactive facilities throughout the country. Professional continuing education is a must and a challenge. This paper discusses a web-based project designed to provide effective communication about occupational exposure, using creative, innovative and practical Internet solutions to link geographically distant workers to high-quality reliable information. This web-based-project counts on concepts, definitions and theory about radiological protection issues, such as optimization programs and ionizing radiation monitoring procedures. Moreover, the content presents discussions related to national and international recommendations, such as potential exposure, which is currently one of the most important research fields in radiological protection. Only few publications develop expressively the issue and there is still lack of knowledge and uncertainties. Risk definition itself can assume different meanings, even among scientific community. To respond to this challenge, this project discusses potential exposures through question-and-answer topics addressing particular attention to effective actions towards safety which can be incorporated into labor practice in the workplace. For discussions to be effective, all content is based on ICRP and IAEA valid recommendations and official reports, in addition to scientific papers published in major international congresses. This project aims to provide radioactive facilities reliable updated communication, to inform as many people as possible, contributing to develop workers´professional skills and to improve safety culture in workplace.
Information and communication about occupational exposure in workplace
2017 - LEVY, D.S.; SORDI, G.M.A.A.; RODRIGUES, D.L.; CARNEIRO, J.C.G.G.
Medical applications of ionizing radiation are essential for protecting and improving human health. The radiological protection objective is to keep doses as low as reasonably achievable, maximizing dose reduction in order to obtain the necessary results for patients in diagnostic and interventional radiology, nuclear medicine and radiotherapy. There is plenty of information, published papers and studies about radiological protection for patients, regarding interventional radiology, nuclear medicine, radiotherapy, biomedical research, among others. Nevertheless, medical and paramedical personnel themselves are also exposed to radiological risks associated with the various uses of radiation in medicine. This paper discusses some considerations about radiological protection in workplace, as well as the need of more accurate information and communication about occupational exposure and potential exposures in medical practice. We believe that this type of information and communication will be helpful for exposed individuals knowingly while voluntarily helping - other than in their occupation - in the care, support or comfort of patients undergoing medical diagnosis or treatment and for visitors of the patients.
Qualitative and quantitative approaches of occupational risks agents in a Brazilian facility
2018 - CARNEIRO, J.C.G.G.; ALVES, A.S.; RODRIGUES, D.L.; LEVY, D.S.; SORDI, G.M.A.A.
The occupational risk assessment is a structured and systematic process, which depends on the correct identification of probable risk factors and agents potentially founded at workplace. The objective of this paper was to carry out the basic characterization of a Brazilian radioisotope production facility through ample knowledge of the workplace, workforce, task performed and identification and evaluation of occupational risk agents in the workplace. The data analysis comprised a qualitative or quantitative approaches based on subjective information obtained by questionnaire, interview and observations about workplace, workforce and risk agents. The workforce was distributed into eight work processes. Regarding task-related exposure there was assumed that all workers presented the same exposure profile. Therefore, it was made an evaluation of the association degree between the occupational risks agents, which there were identified 17 risk agents at the workplace, including physical, chemical, biological, ergonomic and accident risks. Although the workers may be potentially exposed to different risk agents, the ionizing radiation was the main physical risk factor observed in this facility.
Percepção de risco no processo de trabalho com fontes de radiação
2017 - CARNEIRO, J. C. G.; LEVY, D.; SANCHES, M.P.; RODRIGUES, D.L.; SORDI, G.M.A.A.
Este estudo discute o risco ocupacional sob três aspectos distintos, que muitas vezes apresentam-se interligados ou são interdependentes no ambiente laboral. São eles: riscos ambientais, falhas humanas e falhas de equipamento. O artigo aborda a exposição potencial no ambiente de trabalho, causada pelo agente do risco físico radiação, resultante do manuseio com fontes de radiação ionizante. Baseado no histórico dos acidentes ocorridos em operações normais, o estudo apresenta um resumo dos principais acidentes em diversas instalações e possíveis causas envolvendo os três aspectos do risco. Em suas considerações finais, apresenta as lições aprendidas e as medidas a serem tomadas com o intuito de contribuir para a prevenção e mitigação dos riscos no ambiente laboral. A análise dos casos de acidentes e suas causas fornecem informações valiosas para a prevenção dos riscos de acidentes similares e contribuem para o aprimoramento dos projetos e procedimentos operacionais.
Processo de descontaminação de superfícies em uma instalação de produção de hexafluoreto de urânio natural, (UF6)
2017 - ALMEIDA, CLAUDIO C. de; SILVA, TERESINHA M.; RODRIGUES, DEMERVAL L.; CARNEIRO, JANETE C.G.G.
O principal objetivo deste estudo é relatar a experiência adquirida nas ações tomadas durante o processo de descontaminação de uma instalação do Instituto de Pesquisas Energéticas e Nucleares, IPEN-CNEN/SP, com o propósito de tornar o local para uso irrestrito. As etapas desta operação envolveram: planejamento, treinamento dos operadores da instalação, análise do local de trabalho e medidas radiométricas. A instalação continha diversos tipos de equipamentos oriundos da torre de produção de hexafluoreto de urânio natural, (UF6) e materiais de outras instalações. Foram estabelecidas regras para o transporte de materiais radioativos, no âmbito interno e externo da instalação e liberação de materiais e da instalação.