Jonatas Franco Jonatas - Academia.edu (original) (raw)

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Thesis Chapters by Jonatas Franco Jonatas

After the nuclear accident at Fukushima Daiichi, Japan, in 2011, many countries have identified t... more After the nuclear accident at Fukushima Daiichi, Japan, in 2011, many countries have identified the need for improving environmental and nuclear licensing procedures for its nuclear reactors in order to consolidate the lessons learned from this event. Generally, the safety assessment during the licensing process is performed in a deterministic way, supplemented by probabilistic methods. In Brazil, the nuclear licensing is conducted by Comissão Nacional de Energia Nuclear (CNEN) and environmental licensing is the responsibility of the Instituto Brasileiro de Meio Ambiente e dos Recursos Naturais Renováveis (IBAMA). The licensing model of these two agencies, in the aspects of safety analysis and risk management, is deterministic in its essence. In the nuclear licensing, the behavior of the nuclear power plant, after identifying an initiating event, is studied with methods of calculation and simulation, describing the physical phenomena that occur in the nuclear reactors. The Probabilistic Safety Assessment (PSA) focuses on a sequence of events that can lead to rector core meltdown and reliability studies of safety systems. In the environmental licensing, a Quantitative Risk Analysis (QRA) is required, including probabilistic assessments, to support the Risk Analysis Study (EAR), the Risk Management Program and the Emergency Plan of the plant. This master thesis describes the existing methodologies in Brazil and other countries, as regards the PSA and its implications on environmental and nuclear licensing of nuclear power plants, in order to identify opportunities for improving the licensing process on the Brazilian nuclear reactors, and to improve the safety assessment of systems and reliability of the nuclear reactors.

After the nuclear accident at Fukushima Daiichi, Japan, in 2011, many countries have identified t... more After the nuclear accident at Fukushima Daiichi, Japan, in 2011, many countries have identified the need for improving environmental and nuclear licensing procedures for its nuclear reactors in order to consolidate the lessons learned from this event. Generally, the safety assessment during the licensing process is performed in a deterministic way, supplemented by probabilistic methods. In Brazil, the nuclear licensing is conducted by Comissão Nacional de Energia Nuclear (CNEN) and environmental licensing is the responsibility of the Instituto Brasileiro de Meio Ambiente e dos Recursos Naturais Renováveis (IBAMA). The licensing model of these two agencies, in the aspects of safety analysis and risk management, is deterministic in its essence. In the nuclear licensing, the behavior of the nuclear power plant, after identifying an initiating event, is studied with methods of calculation and simulation, describing the physical phenomena that occur in the nuclear reactors. The Probabilistic Safety Assessment (PSA) focuses on a sequence of events that can lead to rector core meltdown and reliability studies of safety systems. In the environmental licensing, a Quantitative Risk Analysis (QRA) is required, including probabilistic assessments, to support the Risk Analysis Study (EAR), the Risk Management Program and the Emergency Plan of the plant. This master thesis describes the existing methodologies in Brazil and other countries, as regards the PSA and its implications on environmental and nuclear licensing of nuclear power plants, in order to identify opportunities for improving the licensing process on the Brazilian nuclear reactors, and to improve the safety assessment of systems and reliability of the nuclear reactors.