Nuclear Power Measurement System Modification Design for Qinshan Nuclear Power PhaseⅡ Units 1&2

Based on the present situation of nuclear power measurement system of Qinshan Nuclear Power Phase Ⅱ Units 1&2, focusing on the characteristics and existing problems of the original system, this paper analyzes the necessity of the modification of nuclear power measurement system, and introduces the scope of digital modification of nuclear power measurement system. Through the upgrading design of the nuclear power measurement system of Qinshan Nuclear Power Phase Ⅱ Units 1&2, the design concept, design principle and design flow of the digital modification of the nuclear power measurement system are discussed, and the framework structure design, design characteristics and specific optimization measures of the upgrading of the nuclear power measurement system are given. There were no design changes during the upgrading of the ex-core nuclear measurement system, and the equipment on site was successfully commissioned at the first try and successfully put into operation. The modification scheme and experience can be used as a reference for the change of nuclear measurement system in other nuclear power plants.