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Risk Analysis

03MAYNW

A.A. 2020/21

2020/21

Risk Analysis

The course deals with the risk assessment of technical systems, a tool to guarantee safety for personnel and population, environment and asset protection against daily and major accidents, both for process plants and mining installations.

Risk Analysis

The course deals with the risk assessment of technical systems, a tool to guarantee safety for personnel and population, environment and asset protection against daily and major accidents, both for process plants and mining installations.

Risk Analysis

Basically, at the end of the course students will be able to manage properly concepts such as safety, hazard, risk and to approach their future daily professional choices using a risk based approach. From a technical point of view, they will be able to organise a risk assessment for a complex technical system (oil&gas process systems or mining installations) using the tools presented in this course and collecting their knowledge resulting from previous courses: • comprehension of a technical system starting from description and drawings; • understanding of the regulation concerning occupational safety, process safety, safety of machineries; • identification of the related hazards; • selection of the potential accidental sequences; • estimation of accident/failure probabilities by RAM (Reliability, Availability, Maintainability) analyses; • estimation of damage extension in case of major accident, by simplified methods; • identification of the preventive and mitigation measures for risk control. The application of these concepts and tools to a real study case will be performed during practical lectures by team working; two different subject will be investigated: a portion of a process plant for petroleum students and a complex installation, composed by several machineries, for mining students. These project works are set in order to train students in the typical approach adopted for professional risk analysis, where several specialists contribute for a common goal, by a multidisciplinary investigation.

Risk Analysis

Basically, at the end of the course students will be able to manage properly concepts such as safety, hazard, risk and to approach their future daily professional choices using a risk based approach. From a technical point of view, they will be able to organise a risk assessment for a complex technical system (oil&gas process systems or mining installations) using the tools presented in this course and collecting their knowledge resulting from previous courses: • comprehension of a technical system starting from description and drawings; • understanding of the regulation concerning occupational safety, process safety, safety of machines; • identification of the related hazards; • selection of the potential accidental sequences; • estimation of accident/failure probabilities by RAM (Reliability, Availability, Maintainability) analyses; • estimation of damage extension in case of major accident, by simplified methods; • identification of the preventive and mitigation measures for risk control. The application of these concepts and tools to a real study case will be performed during practical lectures by team working; two different subject will be investigated: a portion of a process plant for petroleum students and a complex installation, composed by several machines, for mining students. These project works are set in order to train students in the typical approach adopted for professional risk analysis, where several specialists contribute for a common goal, by a multidisciplinary investigation.

Risk Analysis

Fundamentals on physics, chemistry, thermodynamics and fluid mechanics; fundamentals on oil&gas and mining systems and operations.

Risk Analysis

Fundamentals on physics, chemistry, thermodynamics and fluid mechanics; fundamentals on oil&gas and mining systems and operations.

Risk Analysis

1. The Risk concept: definition, assessment, perception and tolerability. 2. Role of Risk in the International Legislation and technical Standards with a special focus on process safety, occupational safety and safety of machineries. 3. Methodologies for the risk assessment: * Elements on the Boolean algebra and probability theory, * Hazard identification, * Methodologies for the reliability assessment of complex systems, * Methodologies for the study of accidental sequences, * Qualitative and Quantitative Risk Assessment, * Risk Assessment and tolerability criteria, *The role of risk assessment in the international legislation. 4. Insights on the reliability theory and RAM (Reliability, Availability, Maintainability) analyses: * RAM characterisation of elementary components, * Reliability Data Banks, * Calculation of unreliability and unavailability for complex systems/machineries, * Common Cause Failures and Criticality Indexes, * Elements of Functional Safety. 5. Process Safety: * Description and modelling of accidental phenomena (loss of containment, fires, explosions, gas dispersion), * Vulnerability analysis, * Emergency planning and management. 6. Occupational safety and safety of machineries: * Investigation of typical hazards (HAZID methodology and statistical investigation), * Verification of safety for machineries by RAMS studies, * Identification of preventive and protection risk control measures.

Risk Analysis

1. The Risk concept: definition, assessment, perception and tolerability. 2. Role of Risk in the International Legislation and technical Standards with a special focus on process safety, occupational safety and safety of machineries. 3. Methodologies for the risk assessment: * Elements on the Boolean algebra and probability theory, * Hazard identification, * Methodologies for the reliability assessment of complex systems, * Methodologies for the study of accidental sequences, * Qualitative and Quantitative Risk Assessment, * Risk Assessment and tolerability criteria, *The role of risk assessment in the international legislation. 4. Insights on the reliability theory and RAM (Reliability, Availability, Maintainability) analyses: * RAM characterisation of elementary components, * Reliability Data Banks, * Calculation of unreliability and unavailability for complex systems/machineries, * Common Cause Failures and Criticality Indexes, * Elements of Functional Safety. 5. Process Safety: * Description and modelling of accidental phenomena (loss of containment, fires, explosions, gas dispersion), * Vulnerability analysis, * Emergency planning and management. 6. Machine Safety: * Investigation of typical hazards (HAZID methodology and statistical investigation), * Verification of safety for machines by RAMS studies, * Identification of preventive and protection risk control measures.

Risk Analysis

Risk Analysis

Risk Analysis

The main part of the course consists in the presentation, by the teacher, of the context of safety and risk assessment, the relevant regulation and the professional methodologies and tools to perform this type of analyses. One third of the course will be spent for practical application of risk analysis (Project Work). Students have to apply the contents of the lectures to perform a safety assessment of a part of a real oil&gas plant or mining system. They have to prepare, by team working, a report describing the analysis performed and a critical discussion of the results obtained.

Risk Analysis

The main part of the course consists in the presentation, by the teacher, of the context of safety and risk assessment, the relevant regulation and the professional methodologies and tools to perform this type of analyses. One third of the course will be spent for practical application of risk analysis (Project Work). Students have to apply the contents of the lectures to perform a safety assessment of a part of a real oil&gas plant or mining system. They have to prepare, by team working, a report describing the analysis performed and a critical discussion of the results obtained.

Risk Analysis

Lecture notes prepared by the teacher; material can be downloaded by the POLITO Didactic Portal. Other books suggested for personal deepening: ' F.P. Lees, Loss Prevention in the Process Industries, Elsevier, 1996; ' AIChE /CCPS, Guidelines for Quantitative Risk Analysis, 2000; ' Vinnem, Quantified Risk Assessment for Offshore Petroleum Installations, NTNU Trondheim Norway, 1997; ' NUREG, PRA Procedures Guide, CR2300, 1983; ' Mc Cormick, Reliability and Risk Analysis, Academic Press, 1981; ' Kletz, HAZOP & HAZAN, Inst. Chem. Eng., 1986; ' TNO, Methods for the Calculation of Physical Effects (Yellow Boook), 1997; ' TNO, Methods for the determination of possible damage, (Green Boook), 1989.

Risk Analysis

Lecture notes prepared by the teacher; material can be downloaded by the POLITO Didactic Portal. Other books suggested for personal deepening: ' F.P. Lees, Loss Prevention in the Process Industries, Elsevier, 1996; ' AIChE /CCPS, Guidelines for Quantitative Risk Analysis, 2000; ' Vinnem, Quantified Risk Assessment for Offshore Petroleum Installations, NTNU Trondheim Norway, 1997; ' NUREG, PRA Procedures Guide, CR2300, 1983; ' Mc Cormick, Reliability and Risk Analysis, Academic Press, 1981; ' Kletz, HAZOP & HAZAN, Inst. Chem. Eng., 1986; ' TNO, Methods for the Calculation of Physical Effects (Yellow Boook), 1997; ' TNO, Methods for the determination of possible damage, (Green Boook), 1989.

Risk Analysis

Modalità di esame: Prova scritta su carta con videosorveglianza dei docenti; Elaborato progettuale in gruppo;

Risk Analysis

The written test will be managed using the Virtual Classroom. Students must keep their microphone and webacm open for all the period of the exam. They must remain in front of tehir computer and connected until the end time even if they finish their exam before. The test must be done in the Word file sent by the teacher. At the end of the exam, students have to upload their works in the didactic portal in both .docx and pdf format. The Project Work must be delivered at the end of the course to the teacher in pdf format (one file only). One copy for each team is sufficient.

Risk Analysis

Exam: Paper-based written test with video surveillance of the teaching staff; Group project;

Risk Analysis

The final exam consists in: ' a written session based on questions and exercises (max 27 points over 30), where each student has 1.5 hours to demonstrate its comprehension on concepts and methods presented during the theoretical lectures as presented in the "Expected Learning Outcomes" section here above; the written test will be managed using the Virtual Classroom. Students must keep their microphone and webacm open for all the period of the exam; they must remain in front of their computer and connected until the end time even if they finish their exam before; the test must be done in the Word file sent by the teacher; at the end of the exam, students have to upload their works in the didactic portal in both .docx and pdf format. Students can use their notes, slides and other materials but any communciation with other people, except the teacher, is forbidden. ' the evaluation, by the Teacher, of the Project Work done by the students during practical lectures (max 4 points over 30); evaluation will take into account the participation of students to the practical lectures, the contents and results of the project work and finally the quality of the final report; the Project Work must be delivered at the end of the course to the teacher in pdf format (one file only). One copy for each team is sufficient.

Risk Analysis

Modalità di esame: Prova scritta su carta con videosorveglianza dei docenti; Elaborato progettuale in gruppo;

Risk Analysis

The written test will be managed using the Virtual Classroom. Students must keep their microphone and webacm open for all the period of the exam. They must remain in front of tehir computer and connected until the end time even if they finish their exam before. The test must be done in the Word file sent by the teacher. At the end of the exam, students have to upload their works in the didactic portal in both .docx and pdf format. The Project Work must be delivered at the end of the course to the teacher in pdf format (one file only). One copy for each team is sufficient.

Risk Analysis

Exam: Paper-based written test with video surveillance of the teaching staff; Group project;

Risk Analysis

The final exam consists in: ' a written session based on questions and exercises (max 27 points over 30), where each student has 1.5 hours to demonstrate its comprehension on concepts and methods presented during the theoretical lectures as presented in the "Expected Learning Outcomes" section here above; the written test will be managed onsite or using the Virtual Classroom. Students can use their notes, slides and other materials but any communciation with other people, except the teacher, is forbidden. In case of remote exam by the Virtual Classroom, students must keep their microphone and webacm open for all the period of the exam; they must remain in front of their computer and connected until the end time even if they finish their exam before; the test must be done in the Word file sent by the teacher; at the end of the exam, students have to upload their works in the didactic portal in both .docx and pdf format. In case the exam is made onsite, the exam will be written on the papers delivered by the teacher. ' the evaluation, by the Teacher, of the Project Work done by the students during practical lectures (max 4 points over 30); evaluation will take into account the participation of students to the practical lectures, the contents and results of the project work and finally the quality of the final report; the Project Work must be delivered at the end of the course to the teacher in pdf format (one file only). One copy for each team is sufficient.

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