The regulations concerning installations classified for the protection of the environment (ICPE) oblige the industrialist to assess the consequences of a major accident which might occur on his site. This Unit deals with the modelling of the intensity of dangerous phenomena leading to major industrial accidents. The programme includes the study of the types of risk effects in the case of containment loss of dangerous substances, in particular the toxic effects (cloud dispersion), thermal effects (fire and BLEVE) and overpressure (explosions). The overall aim of the assessment of consequences is to determine the intensity of effects generated by industrial accidents on personnel, equipment and the environment.
| On completion of the unit, the student will be capable of: | Classification level | Priority |
|---|---|---|
| Identifying the physical phenomena at the origin of major industrial accidents | 1. Knowledge | Essential |
| Describing the development of physical phenomena and explaining the damage caused by each one to persons, equipment and the environment | 2. Understand | Essential |
| Explaining the principles of modelling dangerous phenomena, notably calculation hypotheses | 2. Understand | Essential |
| Explaining the effect thresholds used for modelling the consequences of dangerous phenomena | 2. Understand | Essential |
| Using adapted calculation methods to characterise terms: source, danger flow and target effects | 3. Apply | Important |
| Giving a description of dangerous phenomena, selecting the sequence of calculations to be carried out in order to determine effects on persons, equipment and the environment | 4. Analyse | Essential |
| Comparing the results of effect threshold calculations in order to infer damage levels for persons, equipment and the environment | 4. Analyse | Important |
| Describing the capacities and limits of use of the ALOHA software programme | 2. Understand | Essential |
| Using the ALOHA software programme to characterise the terms of source, danger flow, target effects | 3. Apply | Important |
| Comparing assessment results with ALOHA software with their calculations to correlate the hypotheses of retained calculations | 4. Analyse | Important |
| Percentage ratio of individual assessment | Percentage ratio of group assessment | ||||
|---|---|---|---|---|---|
| Written exam: | 50 | % | Project submission: | % | |
| Individual oral exam: | % | Group presentation: | % | ||
| Individual presentation: | % | Group practical exercise: | % | ||
| Individual practical exercise: | 50 | % | Group report: | % | |
| Individual report: | % | ||||
| Other(s): % | |||||
| Type of teaching activity | Content, sequencing and organisation |
|---|---|
| Course | Introduction : content and organisation of the course ICPE/SEVESO regulatory framework Regulatory frameworks IPCE/SEVESO Physical phenomena at the origin of major industrial accidents Gap flow rates: liquid, gas or dual-phase leaks/spillage, Liquid vaporisation Dispersion of gas clouds, typology of models, wind effects, land effects, atmospheric stability, calculation of pollution levels |
| Supervised studies | Estimation of risk levels after a toxic gas leak |
| Course | Toxic risk: intoxication, toxicity and accidental concentration thresholds. |