Simple download service (Atom) of the dataset: Risks of the PPRi de la Loire, Val de Gien

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 multi-random PPRNs, each zone is usually identified on the hazard map by a code for each hazard to which it is exposed. 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. However, in the case of natural RPPs, regulatory zoning may classify certain areas not exposed to hazard as prescribing areas (see definition of the PPR class).

本类对象指用于反应堆保护项目（RPP）风险分析的危险地图（hazard map）上所标注的、受一种或多种危险影响的区域。该危险地图是危险研究的成果，其研究目标为评估研究区域内任意点位处各类危险的强度。针对不同危险类型，需采用专属的评估方法，据此可在研究范围内划定一系列区域，形成按危险等级分级的分区。针对区域内指定点位的危险等级赋值，需同时考虑该危险现象的发生概率及其强度等级。
针对多随机PPRNs，危险地图上的每个分区通常会通过其所受危险对应的编码进行标识。本类对象涵盖危险地图上标注的全部危险区域。受防护结构保护的区域也必须予以标注（可采用专属方式），因为即便有防护结构，该区域仍可能面临危险（例如结构发生破损或防护能力不足的情况）。
危险分区可被视为经加工的数据集，其生成过程需整合多源的计算、建模或实测危险数据。此类源数据不属于本类对象的范畴，而是由另一项针对危险认知的标准进行规范。研究区域内存在部分被视为"无危险或危险可忽略区域"的点位，此类区域已完成危险评估且危险等级为零，因此不属于本类对象范畴，也无需作为危险分区进行标注。但针对天然RPP，监管分区可能会将部分未受危险影响的区域划定为指定区域（详见PPR类别的定义）。