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Indoor 222Rn concentrations in Central Asturias
J M Pérez Iglesias1, M C Alvarez Alvarez, M T Dopico Vivero
1Nuclear Energy Laboratory, University of Oviedo, Spain.
Health Physics
|May 1, 1996
Summary
Radon-222 (222Rn) levels in Central Asturias homes averaged 23 Bq m(-3), varying by floor and season. The annual public dose from radon inhalation was 0.81 mSv.
Area of Science:
- Environmental Science
- Public Health
- Radiological Protection
Background:
- Radon-222 (222Rn) is a naturally occurring radioactive gas that can accumulate in homes.
- Elevated indoor radon levels pose a significant health risk, primarily lung cancer.
- Understanding regional radon distribution is crucial for public health risk assessment.
Purpose of the Study:
- To survey indoor radon-222 concentrations in residential buildings in Central Asturias.
- To analyze the distribution of radon levels across different floors and seasons.
- To estimate the annual effective dose to the public from radon inhalation.
Main Methods:
- Conducted a three-year survey of 106 homes in four main towns of Central Asturias.
- Utilized passive radon charcoal canisters for 1,014 measurements.
- Applied log-normal distribution analysis to the collected radon concentration data.
Main Results:
- The geometric mean of 222Rn concentration was 23 Bq m(-3), fitting a log-normal distribution.
- Significant differences in 222Rn concentrations were observed between ground/first floors and higher floors.
- Radon levels were found to be lower in summer compared to winter.
Conclusions:
- Indoor radon concentrations in Central Asturias exhibit variations based on building floor and season.
- The estimated annual equivalent dose for the general public is 0.81 mSv.
- Findings highlight the importance of considering building characteristics and seasonal variations in radon exposure assessments.