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Technology Factsheet

Wireless Remote Radiation Monitoring System

Category: Worker Health & Safety > Engineering Controls > Air Monitoring
Reference # : OST No 2104 Model No : WRRS

The RadStar Wireless Remote Monitoring System, developed by SAIC, monitors personnel dose and area exposure rate remotely from a predetermined command center located outside radioactively contaminated areas. A host personal computer monitors and records information transmitted from electronic dosimeters and collected by a transceiver base station using RadStar software. A radio transceiving alarming electronic dosimeter, wireless radio components, radiation detector, and a 9-V alkaline battery are contained in a small case worn by personnel. A dosimeter reader reads the dosimeters and resets them after use. The monitor weighs less than 400 g and is designed for gamma detection. Each dosimeter can be preset to alarm at a set point with either an audible alarm or light-emitting diode and will warn both the worker and the base station. Straight line signals can be transmitted over 10,000 ft. The system was demonstrated at Hanford´s C Reactor at various locations while personnel performed daily routine D&D activities. Dimensions of Tech Model (LxWxH):Weight of Tech Model (lb):


Features preset alarm levels for each of the real-time monitoring dosimeters PD-4s. Dosimeters can act as repeaters for remote areas or where structural obstructions exist. The system can monitor up to 10 individual employees with a different alarm set point for each individual independent of the others. The system avoids the need to bring a potentially contaminated glove or SRD into close proximity to the worker’s face.


The transmission signal has some limitations and should be tested when being used in areas with obstructions and thick concrete walls. Antennas could be installed e.g., a long-range, highly directional shortwave Yagi antenna) to increase radio frequency signal strength. This would avoid the necessity to assign PD-4 dosimeters as repeaters in areas with obstructions.




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