With the tendency of increasing extreme natural hazards,the typhoon,hurricane,and tropical cyclone induced surges,waves and rainstorms menace Nuclear Power Plants( NPP) in coastal areas. National Nuclear Safety Administration of China and International Atomic Energy Agency( IAEA) have recommended safety regulations for NPP site evaluation installation and coastal defence infrastructures. These standards include Probable Maximum Hurricane/Typhoon( PMH/T),Probable Maximum Storm Surge( PMSS),Probable Maximum F...