Calibration system for measuring the radon flux density

Area of Science:

• Environmental Science
• Geophysics
• Radiological Protection

Background:

• Radon flux measurement from soil is vital for assessing radon-prone areas and monitoring releases from uranium mining.
• Accumulation chambers and activated charcoal chambers are commonly used devices for radon flux measurements.
• Measurement accuracy is influenced by chamber geometry and radon diffusion in soil.

Purpose of the Study:

• To construct a calibration system for attesting radon flux measurement devices.
• To calibrate accumulation chambers and activated charcoal chambers.
• To validate measurement results using 2D modeling.

Main Methods:

• Construction of a calibration system for radon flux measurement devices.
• Conducting calibration measurements using accumulation chambers and activated charcoal chambers.
• Utilizing 2D modeling for comparison with measurement results.

Main Results:

• A calibration system for radon flux measurement devices was successfully established.
• Calibration measurements were performed on both types of chambers.
• Observed good agreement between 2D modeling predictions and experimental measurement results.

Conclusions:

• Reliable radon flux measurements can be achieved using activated charcoal chambers (approx. 75 L) or hollow headspace accumulation chambers (7-10 L with height >15 cm).
• The developed calibration system and 2D modeling aid in ensuring measurement accuracy.
• Optimized chamber design is key to obtaining dependable radon flux data.