Development and Validation of Isolation Amplifiers for Nuclear 1E Application

This paper presents the design scheme of nuclear-1E-class isolation amplifiers for safety shutdown system of nuclear power plants.The scheme adopts the switching power supply technology and the analog power supply techniques to design the power module.And then,the design methods for improving the stability and reliability of the isolation amplifiers is detailed from the point view of anti-interference,the device derating and anti-seismic.Performance validation shows that the product has passed all tests of nuclear-1E-class certification program and satisfies the nuclear 1E requirement,and its reliability and various technical indicators have reached or exceeded the similar foreign products.