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Predicted responses for a particulate detection system in a continuous stack monitor
Mark A Tries1, Ryan L Holloman, Leo M Bobe
1University of Massachusetts Lowell, Department of Physics and Applied Physics, 01854, USA. Mark_Tries@uml.edu
Health Physics
|September 21, 2002
Summary
This study developed predicted counting rate responses for a research reactor
Area of Science:
- Nuclear Engineering
- Environmental Monitoring
- Radiation Detection
Background:
- Research reactors require continuous monitoring of radioactive particulates in effluent air.
- Particulate detection systems are crucial components of comprehensive stack monitoring.
Purpose of the Study:
- To develop predicted counting rate responses for a particulate detection system.
- To assess the accuracy of manufacturer response models and establish alarm settings.
Main Methods:
- Derived predicted response for steady-state activity distribution using Cesium-138 as an indicator.
- Formulated response model for rapid changes in airborne activity based on rate meter circuit kinetics.
Main Results:
- Steady-state response determined to be 1.59 x 10(7) cpm per unit airborne concentration of 138Cs.
- Manufacturer's model underestimated airborne activity by approximately one order of magnitude.
Conclusions:
- The developed models provide accurate responses for particulate detection systems.
- Established alarm settings and detection limits for enhanced safety and monitoring.