Non-contacting pressure detection system

Abstract From the Canadian patent

A system including a sensor and electronic instrumentation for measuring fission gas pressures inside a pressurized system or device or the like such as a nuclear, fuel rod. The system is based primarily on what is commonly known as the effect which is the dependence of the magnetic permeability of certain magnetic materials upon applied stress, and permits pressure measurements to be made without any mechanical or physical penetration of the fuel cladding or end cap of the fuel rod. In a preferred embodiment pressure sensing is implemented by locating a sensor made from Villari sensitive material inside the pressurized system. The pressure places a stress loading on the sensor which in …