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前言核电站设施不仅规模大,而且是储存放射性物质的建筑物。因此与一般建筑物比,以严格条件进行抗震设计,大震时不使周围地区居民尤其是操作人员过度遭受放射线辐射。一般建筑物的抗震设计标准是,在使用期间可能遇到1—2次或更多次的中强地震(按地面最大加速度计算为80～100伽),仅限于产生轻微破坏(混凝土出现裂缝)。罕见大震的(地面最大加速度为300—400伽)抗震设计标准就是确保人员的生命安全并维持有关机能。在核电站设施中,对重要的设施要进行抗震设计,相当于发生上述罕见的大震(设计用最强
Foreword Nuclear power plant facilities are not only large-scale but also buildings that store radioactive material. Therefore, compared with the general building, the seismic design is carried out under strict conditions so that residents in the surrounding area, especially the operators, will not be excessively exposed to radiation during the earthquake. Aseismic design criteria for a typical building are that moderate to strong earthquakes (from 80 to 100 Gac according to maximum ground acceleration) may be encountered 1-2 or more times during use, limited to minor damage (cracks in the concrete) . Rare earthquake (ground maximum acceleration of 300-400 gamma) seismic design standards is to ensure the safety of life and maintenance of personnel related functions. In nuclear power plant facilities, seismic design of important facilities is equivalent to the occurrence of the rare earthquakes (the strongest design