Map Viewing Service (WMS) of the dataset: Zone d’aléa du PPRT of the establishment RHODIA in the municipality of La Rochelle, in Charente-Maritime

Area exposed to one or more hazards represented on the hazard map used for risk analysis of the RPP. The hazard map is the result of the study of hazards, the objective of which is to assess the intensity of each hazard at any point in the study area. The evaluation method is specific to each hazard type. It leads to the delimitation of a set of areas on the study perimeter constituting a zoning graduated according to the level of the hazard. The allocation of a hazard level at a given point in the territory takes into account the probability of occurrence of the dangerous phenomenon and its degree of intensity. For PPRTs the hazard levels are determined effect by effect on maps by type of effect and overall on an aggregated level on a synthesis map. All hazard areas shown on the hazard map are included. Areas protected by protective structures must be represented (possibly in a specific way) as they are always considered subject to hazard (case of breakage or inadequacy of the structure). Hazard zones can be described as developed data to the extent that they result from a synthesis using multiple sources of calculated, modelled or observed hazard data. These source data are not concerned by this class of objects but by another standard dealing with the knowledge of hazards. Some areas within the study area are considered “no or insignificant hazard zones”. These are the areas where the hazard has been studied and is nil. These areas are not included in the object class and do not have to be represented as hazard zones.本类对象指用于反应堆保护规程（RPP）风险分析的灾害地图（Hazard Map）上标注的、暴露于一种或多种灾害的区域。 灾害地图（Hazard Map）源于灾害专项研究，其核心目标为评估研究区域内任意点位的各类灾害强度。评估方法因灾害类型而异，最终将在研究范围内划定一系列区域，形成按灾害等级分级的分区体系。在场地特定点位分配灾害等级时，需综合考量危险现象的发生概率及其强度等级。 针对PPRT，灾害等级需按效应类型在对应地图上逐效应确定，并在综合地图上按聚合层级开展整体评定。 灾害地图（Hazard Map）上标注的所有灾害区域均需纳入本类对象。受防护结构保护的区域亦需标注（可采用特定方式），因即便设有防护结构，仍存在结构破损或失效的可能，此类区域依旧被视为处于灾害风险中。 灾害区域可被视作经整合加工的数据集，其生成依托多源计算、建模或观测得到的灾害数据进行综合汇总。本对象类不涵盖此类源数据，相关源数据需遵循另一项面向灾害认知的标准进行管理。 研究区域内部分区域被归类为“无灾害或灾害可忽略区域”，即经研究确认灾害风险为零的区域。此类区域不属于本对象类范畴，无需作为灾害区域进行标注。