Analysis of the impact of accident temperature environment on pressure transmitter in nuclear power plant

Pressure transmitters are widely used in measuring of process parameters in nuclear power plant. Most of the pressure transmitters located in containment vessel have passed the DBA qualification, but whether they could survive in high-temperature environment in DBDA is unknown. In this article, we made analysis about the characteristics of pressure transmitter, and used both envelope and simulation methods to study how temperature affects the transmitter in DBA and BDBA condition. At last, we gave some suggestions on way of improving the resistance to elevated temperature of transmitter according to the study. (authors)