Corrosion estimating method for plant structural material and corrosion diagnostic system

摘要

In a plant dealing with an acidic solution, particularly in a spent nuclear fuel reprocessing plant, corrosion of a structural material contacting the acidic solution is estimated. A product of a corrosion rate in a boiling state under atmospheric pressure, a corrosion accelerating rate of a dissolved chemical species, a welding working effect correction value, a temperature correction value and an operating mode correction value is estimated as the corrosion rate of the plant to be diagnosed. A diagnostic system estimates a corrosion rate and a corrosion state using material information, operational information and medium information to output the estimated result. <IMAGE>