一、抗震设计特点核电站与火力发电厂相比,其安全标准要求较高.美国安全标准要求核电站对发生率10~(-7)次/年以内的所有极端荷载(如强地震、弹射物的撞击等)进行设防,并要求核电站在整个运行寿期内不发生任何导致人身安全的核放射.地震是核电站安全的最大威胁.大地震和中等地震均可能对核电站造成不同程度的损坏,以至构成放射性危害.因此世界上所 1. Seismic Design Features Compared with thermal power plants, nuclear power plants require higher safety standards. The US safety standard requires nuclear power plants to perform all extreme loads within 10~(-7) times/year (such as strong earthquakes and projectiles). Impacts, etc.) are fortified, and nuclear power plants are required to have no nuclear radiation leading to personal safety during the entire operational life span. Earthquakes are the greatest threat to the safety of nuclear power plants. Large and medium earthquakes may cause varying degrees of damage to nuclear power plants and result in Radioactive hazards. Therefore the world