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Measurement of indoor radioactivity and dose derived from 222Rn, 220Rn and EECs by using SSNTD based technique
Taufiq Ahamad1, Om Prakash Nautiyal2, Manish Joshi3
1Department of Physics, HNB Garhwal University, Badshahi Thaul Campus, Tehri Garhwal 249199, India.
Radiation Protection Dosimetry
|July 17, 2024
Summary
Indoor radon (222Rn and 220Rn) concentrations and associated alpha flux are below WHO and ICRP safety limits. This study found natural radioactivity levels safe for inhabitants, despite non-normal data distribution.
Area of Science:
- Environmental Science
- Radiological Health
- Atmospheric Physics
Background:
- Alpha flux from radon isotopes (222Rn, 220Rn) and their progeny is a major source of natural radioactivity in ambient air.
- Understanding indoor radon concentrations is crucial for assessing public health risks associated with natural radiation exposure.
Purpose of the Study:
- To quantify annual indoor concentrations of 222Rn and 220Rn.
- To estimate the annual inhalation dose from alpha flux exposure.
- To compare measured levels and doses against established international safety guidelines.
Main Methods:
- Measurement of annual indoor 222Rn and 220Rn concentrations.
- Calculation of annual inhalation dose based on alpha flux.
- Statistical analysis, including normality testing for 222Rn and Effective Equilibrium Radon Concentration (EERC) data.
Main Results:
- Annual indoor 222Rn and 220Rn concentrations were 85 ± 43 Bq m-3 and 84 ± 36 Bq m-3, respectively.
- These concentrations are below the World Health Organization (WHO) reference value of 100 Bq m-3.
- Calculated annual inhalation doses are well below UNSCEAR and ICRP recommended levels.
- Normality tests indicated that 222Rn and EERC data are not normally distributed.
Conclusions:
- Indoor radon concentrations and associated inhalation doses in the studied environment are within safe limits.
- Findings suggest minimal radiological health risk to inhabitants from natural radon radioactivity.
- The non-normal distribution of 222Rn and EERC data warrants consideration in future radiological assessments.
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