Technological Risk Prevention Plan — Slow kinetics — Dunkirk Urban Community

Plans for the prevention of technological risks (PPRT), created by the Law of 30 July 2003 following the AZF disaster in Toulouse, aim, by dealing with situations inherited from the past, to improve and sustain the coexistence of the activity of the sites industrialists called “high risk” with their neighbors. They are intended to ensure the protection of people while offering industrial sites the opportunity to invest in their future without questioning the security of their neighbourhood. They are an indispensable tool for development of industrial zones in safe conditions. The PPRTs provide, after a prior risk reduction at source (at the expense of the operator of the industrial site): “Bottom” measures on existing urbanisation, consisting of expropriations and rights voluntary abandonment of property; “Additional” risk reduction measures at source proposed by the operator going beyond regulatory requirements, where implementation is less costly whereas the land measures they help to avoid; Restrictions or rules on future urban planning, on the use of future buildings, roadways existing or future communication of equipment..., as well as restrictions on use or building rules on future buildings built near the industrial site; Work to be carried out on existing constructions in the vicinity of the industrial site, to reduce vulnerability, work the amount of which may not exceed 10 % of the market value of the all right. ** The different risk levels are staggered as follows:** **TF+** Very Strong + Effects whose consequences on human life are judged very serious and whose cumulation of probability classes of occurrence of phenomena dangerous at this level of intensity leading to these effects is strictly greater than D . **TF** Very Strong Effects whose consequences on human life are judged very serious and of which cumulation of probability classes of occurrence of phenomena dangerous at this level of intensity leading to these effects is between D and 5E. **F+** Fort + Effects whose consequences on human life are judged very serious and of which cumulation of probability classes of occurrence of phenomena dangerous at this level of intensity leading to these effects is strictly less than 5E Or Effects whose consequences on human life are judged serious and of which cumulation of probability classes of occurrence of dangerous phenomena at this level of intensity leading to these effects is strictly superior to D. **F** Fort Effects whose consequences on human life are judged serious and of which cumulation of probability classes of occurrence of dangerous phenomena at this level of intensity leading to these effects is between D and 5E. **M+** Medium + Effects whose consequences on human life are judged serious and of which cumulation of probability classes of occurrence of dangerous phenomena at this level of intensity leading to these effects is strictly less than 5E Or Effects whose consequences on human life are judged significant and of which cumulation of probability classes of occurrence of phenomena dangerous at this level of intensity leading to these effects is strictly greater than D. M Average Effects whose consequences on human life are judged significant and of which cumulation of probability classes of occurrence of phenomena dangerous at this level of intensity leading to these effects is between D and 5E. **FAI** Low Effects whose consequences on human life are judged significant and of which cumulation of probability classes of occurrence of phenomena dangerous at this level of intensity leading to these effects is strictly less than 5E Or Potentially subject to an effect the consequences of which are broken glass windows. **Slow kinetics** The so-called slow kinetics zone corresponds to the area of effect of dangerous phenomena with an onset kinetics sufficient to enable the implementation of an emergency plan to ensure shelter for those present in this area. For example, the areas of effect of dangerous boilover phenomena of crude oil storage tanks with a filling rate of 100 %.