Map Viewing Service (WMS) of the dataset: Risks of the PPRi of the Loing Valley, Montargoe and farther downstream

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).本类数据集指用于反应堆保护程序（RPP）风险分析的灾害地图（Hazard Map）上标注的、遭受一种或多种灾害（Hazard）侵袭的区域。该灾害地图源自灾害专项研究，其核心目标为评估研究区域内任意点位处各类灾害的强度等级。评估方法因灾害类型而异，据此可在研究范围边界内划定若干区域，形成一套按灾害等级分级的区划方案。针对研究区域内特定点位的灾害等级赋值，需综合考量该危险现象的发生概率及其强度程度。 针对多随机PPRN（PPRN）场景，灾害地图上的每个区域通常会通过其暴露所涉各灾害的专属代码进行标识。本类数据集涵盖灾害地图上标注的全部灾害影响区域。受防护结构保护的区域必须予以标注（可采用特定方式），因为此类区域始终被视为存在灾害风险，即结构发生破损或防护能力不足的情形。 灾害区域可被视为经开发的数据集，其生成基于对多源计算、建模或观测所得灾害数据的综合整合。本类数据集不涉及上述源数据，相关源数据由另一项针对灾害认知的标准规范进行管理。研究区域内部分区域被划分为"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。此类区域不属于本类数据集范畴，无需作为灾害区域进行标注。但针对天然RPP场景，监管区划可能将部分未受灾害影响的区域划定为强制管控区域（详见PPR类（PPR）的定义）。