CONTROL AND EVALUATION OF THE RISK OF POPULATION EXPOSURE TO RADON Introduction. A safe way to reduce the onset of oncological diseases is to protect the population from exposure to radon. In order to know the risk of radon influence on the health of the population, it is necessary to quantify the radon concentrations in the homes air and environment components. Material and methods. The aim of the study was to monitor radon concentrations in the air from different types of housing (n=2500), in rural and urban areas, on the territory of the Republic of Moldova, by using RADTRAK2-type detectors, with the assessment of the risk of population exposure to radon. The exhibition period was 90 days. Results. The results indicate on the radon problem existence on the country territory and the need for a strict solution of the problem. Thus, in 615 homes from the studied ones (25%) the radon concentration was higher than the national norms; in 662 homes (26%) radon concentration was higher than European norms. In 1277 homes (51%) radon concentration was higher than National/European norms. In connection with the above, the Government Decision draft was elaborated. A special role is given to the need to elaborate and make changes to the Building Code, with the need to monitor radon when commissioning residential buildings. Conclusions. The results denote increased variability of the radon concentrations according to the geographical area, the type of housing and other factors. Radon mapping identified the localities with high risk of exposure of the population to radon. Cuvinte cheie: radon, sănătate publică, risc Introducere. O cale sigură de diminuare a declanșării maladiilor oncologice o constituie protecția expunerii populației la radon. În vederea cunoașterii riscului influenței radonului asupra sănătății populației este necesară cuantificarea concentrațiilor de radon în aerul din locuințe și din componentele mediului ambiant. Material și metode. Scopul studiului a constat în monitorizarea concentrațiilor de radon în aerul din diferite tipuri de locuințe (n=2500), din zonele rurale și urbane, de pe teritoriul Republicii Moldova, prin utilizarea detectorilor de tip RADTRAK2, cu evaluarea riscului expunerii populației la radon. Perioada de expoziție a constituit 90 de zile. Rezultate. Rezultatele indică asupra existenței problemei radonului în locuințe, pe teritoriul țării și necesitatea soluționării stringente a problemei. A fost constatat că, în 615 locuințe studiate (25%) concentrația radonului depășea normele naționale, iar în 662 de locuințe (26%) a depășit normele europene. Astfel, în 1277 de locuințe (51%) analizate concentrația radonului a fost mai mare decât normele naționale/europene. În rezultatul celor expuse a fost elaborat proiectul Hotărârii de Guvern "Cu privire la aprobarea Strategiei Naționale privind reducerea riscului asociat iradierii naturale, inclusiv a radonului". Un rol deosebit îl constituie elaborarea și efectuarea modificărilor la Codul construcțiilor, cu necesitatea monitorizării radonului l...

Development of a standard dosimetric facility with protection against external radiation background for the metrological support of highly sensitive radiation monitoring devices in accordance with the requirements of international standards .

This work presents the results from measurements of radon concentrations in primary and high school education institutions—including their gymnasiums—from the Chisinau municipality and various rayons from the central and southern part of the Republic of Moldova. In the research carried out during the years of 2013–2014 and 2021, there were 78 (29 + 49) premises included, respectively, and 149 and 23,805 investigations were performed using RTM-1642 (active measurements) and RadonEye+2 devices (passive measurements). The results show an essential variability for the studied radio-stressogenic factor, depending on the geological conditions of the location of the premises and the age of the building. Thus, during 2013–2014, the minimum concentration of radon detected was 26 Bq m−3, and the maximum detected was 607 Bq m−3. In 2021, the results denote an indicator variability in the range of 17.4–657.9 Bq m−3 for early education institutions, with an average value of 127.6 Bq m−3, and denote a range of 231.8–1129.3 Bq m−3, with an average value of 665.4 Bq m−3), for high school education institutions and their gymnasiums. The effective annual dose for the children in a classroom varies between an interval of 0.21–4.88 mSv y−1 (average 1.19 mSv y−1) and 0.14–9.08 mSv y−1 (average 1.29 mSv y−1) for the 2013–2014 and 2021 surveys, respectively.

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