Aiming to solve the problem ofthe data reliability of the marine floating nuclear power plants,this paper presents a method based on the fuzzy theory to determine the failure probability of the components of such marine floating nuclear power plants.As is known,since the system structure and the operating environment of marine floating nuclear power plants are to be quite different from those of the land-on reactors,the failure rates of the same components ought to be made much lower with a lot of difference.That is why,first of all,it is necessary to analyzethe failure indexes of the equipmen...