The coastal nuclear power plant uses seawater as a cooling source. When the seawater contains suspended solids, floating objects, sea creatures (small fish, hairy shrimps, jellyfish, pennant snails, seaweed, etc.) that exceed the filtration and cleaning capacity of the cooling water filtration equipment, the water intake or filtration equipment will be blocked and will not be able to provide the required cooling water, which will lead to a cooling water source safety incident.
A comprehensive defense system is established for the water intake system of nuclear power plants, which includes underwater defense, surface and underwater filtration and interception, to protect the safety of nuclear power plants underwater and surface.