2 new peer-reviewed papers have been published as part of the work in WP 2 (Exposure).

Performance evaluation of radon measurement techniques in single-family homes by J. F. Rey, D. Licina and J. G. Pernot features a study that was conducted in 20 single-family homes across Western Switzerland to assess different radon measurement methods. Researchers used passive dosimeters and three types of real-time sensors over periods up to one year. Results showed that short-term passive measurements were nearly as reliable as long-term ones. Medium- and consumer-grade real-time sensors showed errors of 10% and 18% compared to research-grade devices. However, their overall accuracy remained acceptable, typically under 20%. These findings matched previous lab-based tests, confirming real-world reliability. The study suggests short-term passive and low-cost real-time sensors can effectively replace traditional methods. It provides valuable insights into the performance of radon measurement techniques in real-life settings.

Short-Term Temporal Variability of Radon in Finnish Dwellings and the Use of Temporal Correction Factors by T. Turtiainen, K. Kojo and P. Kurttio features a study which investigated the reliability of short-term electronic radon measurements as alternatives to traditional long-term methods for assessing radon levels and exposure in Finnish homes. Conducted over a year in 55 dwellings, it used hourly recordings and probabilistic analysis to assess the potential for erroneous assessments. Results indicated that for short-term measurements of 2–5 days, a threshold of 90–100 Bq/m³ should be used to maintain a maximum false-negative rate of 1%, beyond which longer measurements are required. The study concluded that short-term measurements are not yet suitable replacements for long-term methods, though it noted significant fluctuations in radon levels in September, suggesting potential adjustments to the measurement season.

More RadoNorm publications can be found on the website.