A Versatile Modular Radiation Monitoring System

Don Dale and Daryl Bishop
TRIUMF

A modular microprocessor-based Radiation Monitoring System has been developed for the detection of neutron, gamma and beta fields. The system consists of distributed local monitoring stations located close to the radiation detectors. A local monitoring station houses up to two Universal Detector Modules and a power supply in a standard Eurocard cage. The Universal Detector Module supports Geiger-Mueller tubes and photomultiplier detectors. The module provides local display of averaged radiation fields and high radiation level trip contacts. A local station can operate stand-alone or communicate with a supervisory processor on an RS-422 highway. Experience with an installed system is described.