A Microprocessor Based Environmental Radiation Monitoring System

A multisensor environmental radiation monitoring system utilizing pressurized ionization chambers is described. The system is capable of measuring incremental increases in gamma radiation exposure of the order of 1 mrad/year due to gaseous effluents from nuclear power plants. Continuous monitoring at a number of sites at or beyond the reactor boundary is performed automatically under control of a microprocessor-based central data acquisition facility. The exposure rate record from each sensor is reduced to a convenient form which can be used to easily determine the reactor plume contribution to the total exposure.