Those detectors function as electrical tranducers and are used in assemblies for measuring power and rate of change of power by means of neutron fluence rate (flux), period meters 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 personal dosimetry purposes. The detectors subject to this standard are: boron current ionization chambers, fission current ionization chambers or pulse ionization chambers, ionization chambers for gamma radiation, boron trifluoride proportional counter tubes, boron-lined proportional counter tubes, boron-lined proportional counter tubes, helium-3 proportional counter tubes (this list is not restrictive).