New interface issues of nuclear reactor neutron flux measurement system using unified standard signal

When nuclear reactor control and protection system uses a unified standard electrical analog signal (4-20 mA) as an exchange signal, there exist problems of synchronization between the virtual value and range of output signals during switching of Neutron Flux Measurement System (NFMS), and thus false actions occur in the protection system, the alarm system and the power control system. The cause of these new interface issues were described in this paper, and one solution for this problem was given in detail. (authors)