scope:

The aim of this publication is to establish a standard concerning the characteristics and test methods of gas-filled radiation detectors used for the instrumentation and protection of nuclear reactors. These detectors function as electrical transducers and are used particularly in: assemblies for measuring power and rate of change of power by means of neutron fluence rate (flux); periodmeters or reactivity meters; reactor warning and safety monitoring assemblies; assemblies for measuring power by means of gamma radiation. The detectors examined in this standard are not used for personnel dosismetry purposes.