| Abstract: | Based on the latest practices at the Institut de Protection et de Sûreté Nucléaire (IPSN) of the Commissariat à l'Energie Atomique (CEA), this paper presents the basic elements used for the simple modelling of hypothetical atmospheric pollution resulting from transient or continuous discharge. The effects of given kinetics under various weather conditions, which are not necessarily stationary or uniform, but are likely to occur with little or no wind are also considered. Discharges are considered as sequences of instantaneous puffs. The parameters deduced experimentally or from observations are functions of the transfer time, and cover all time and space scales. The restrictions of use are indicated, especially concerning heavy gases. Finally, simple formulae are proposed for concentrations and depositions so as to be able to make a rapid estimation of the orders of magnitude with almost no computation. |
