Method for tracing source to obtain important running parameters of pressurized water reactor

The invention provides a method for tracing the source to obtain important running parameters of a pressurized water reactor. The method comprises the following steps of selecting a section of pelletin at least one fuel rod from an unknown pressurized water reactor to serve as a to-be-detected sample, and measuring the mass or the quantity of nuclides in the sample, wherein the detected nuclidesat least include three of eight nuclides: uranium 235, uranium 236, uranium 238, plutonium 238, plutonium 239, plutonium 240, plutonium 241 and plutonium 242; calculating the ratio of the mass or thequantity of different nuclides; tracing the source to obtain the running parameters of the to-be-detected pressurized water reactor according to the obtained ratio. By means of the method, two important running parameters, namely the initial enrichment degree and the burning consumption, can be obtained, and the method has the advantages of small measurement error, low measurement cost and the like. 本发明提供一种用于溯源取证压水堆重要运行参数的方