Reactor Gaseous Activity Monitoring

The first section of this paper considers the physcial design of detector heads for monitoring the activity in gas flow circuits commonly met in reactor systems, particular attention being given to detectors of the scintillation type. The second section describes the detailed requirements of the electronic system wqhich is used with the detector heads to form complete monitors, reference being made to the conventional principles of electronic design giving fail-to-safety operation and built-in self checking facilities. The third section describes typical practical systems, based on the preceding philosophy, which have been designed for use on gas circuits of experimental, materials testing, and power producing reactors.