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Related Experiment Video

Updated: Jun 3, 2026

Irradiator Commissioning and Dosimetry for Assessment of LQ α and β Parameters, Radiation Dosing Schema, and in vivo Dose Deposition

Irradiator Commissioning and Dosimetry for Assessment of LQ α and β Parameters, Radiation Dosing Schema, and in vivo Dose Deposition

Published on: March 11, 2021

Granulation effects on the radon emanation rate.

I Bikit¹, D Mrda, S Grujic

¹Department of Physics, Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovica 4, Novi Sad, Serbia. bikit@df.uns.ac.rs

Radiation Protection Dosimetry

|April 8, 2011

Summary

This summary is machine-generated.

Building material granulation significantly impacts radon-222 (Rn-222) emanation. Smaller particle sizes, especially in siporex brick, increase radon release, while ceramic plates show minimal granulation effect on radon emanation.

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Area of Science:

Environmental Science
Radiological Protection
Materials Science

Background:

Radon-222 (Rn-222) is a naturally occurring radioactive gas that poses health risks, particularly in indoor environments.
Building materials can be a source of indoor radon, influenced by their composition and physical properties.
Understanding radon emanation from building materials is crucial for mitigating indoor radiation exposure.

Purpose of the Study:

To investigate the effect of granulation (particle size) on radon emanation rates from various building materials.
To quantify the radon emanation coefficient for ceramic plates, sand, red brick, and siporex brick at different granulations.
To identify which building materials are most susceptible to granulation effects on radon release.

Main Methods:

Materials were processed using a ball mill to achieve varying granulation levels.
Particle size distribution was analyzed using a Mastersizer 2000 particle size analyzer.
Radon-222 concentration buildup in a closed chamber was measured over time using an alpha spectrometer (RAD7).

Main Results:

Siporex brick exhibited the highest radon emanation coefficient (27%) when its grain size was smallest (0.34 µm).
Ceramic plates showed a negligible granulation effect, with very low emanation coefficients (around 0.4%).
The strongest influence of granulation on radon emanation rate was observed for siporex brick samples.

Conclusions:

Granulation significantly affects radon-222 emanation from building materials, with finer particles generally leading to higher emanation.
Siporex brick is particularly sensitive to granulation effects on radon release compared to ceramic plates.
Material-specific properties dictate the extent to which particle size influences radon emanation.