The current status analysis and reliability improvement of reactor coolant pump speed measurement

Reactor coolant pump speed converter (referred to as the converter) is the key-equipment of monitor reactor coolant pump speed. During the twenty years of power plant operation, there were several reactor coolant pump speed measuring failures caused by the converter itself. It points out that the root cause of failure is component quality and unreasonable circuit design. To thoroughly solve the problem of speed measurement anomaly, the writer decided to employ improvement resolution of 1E development. The new product has been carried out comprehensive improvement in the circuit development. Besides, local optimization has been performed in the structure design. The newly developed 1E converter has the characteristics of high precision, stable performance and strong ability of anti-interference. After being applied in the field, it showed good condition, and improved the security and reliability of the power plant operation. (author)