Capacitance Level Gauge for Pressurizers of Pressurized Water Reactor Plants

The pressure of a pressurized water nuclear power plant is maintained by heating water to saturation temperature in a vessel partially filled with water. The water level in this vessel, the pressurizer, must be monitored for safe plant operation. This paper describes the application of a well-known principle of liquid level measurement to this problem. The unusual operating conditions made the development of the device difficult.