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Na petnaestak lokacija (škola i vrtića) u Istarskoj županiji u kojima su ranije utvrđene povišene vrijednosti koncentracije radona, od rujna 2018. godine provedena su mjerenja koncentracije radona pasivnom metodom s odvojivim (engl. strippable) detektorima nuklearnih tragova LR-115 tip II (proizvođač: Kodak-Pathé, Francuska). Istovremeno su se u navedenim objektima od listopada 2018. do travnja 2019. godine kontinuirano mjerile koncentracije radona TSR3 mjernim uređajima (proizvođač Tesla, Republika Češka) u minimalnom trajanju od 3 tjedna po objektu s vremenskom rezolucijom od 1 h. Dobiveni kontinuirani vremenski nizovi omogućuju uvid u dnevne varijacije u koncentraciji radona i posljedično bolju procjenu doze koju učenici i zaposlenici prime za vrijeme svog boravka u objektu. Rezultati mjerenja pokazali su da su koncentracije radona u radnom vremenu objekata niže u prosjeku za oko 15% u odnosu na koncentracije radona dobivene za cijeli period mjerenja. Stoga je postojeći protokol za mjerenje koncentracije radona u školama i vrtićima potrebno revidirati uvodeći drugu fazu mjerenja u onim školama u kojima je, u prvoj fazi, utvrđena koncentracija viša od referentne (>300 Bq/m3). Ova revizija protokola trebala bi biti dio aktivnosti postojećeg nacionalnog Akcijskog plana za radon za razdoblje 2019.–2024. godine.

The Act on radiological and nuclear safety (OG 141/13, OG 39/15, OG 130/17) especially Article 65.a gives a legal framework for establishing the Radon Action Plan (RAP) which is a requirement of the Article 103 within EC Directive 2013/59/Euratom. The State Office for Radiation and Nuclear Safety (SORNS) appointed in January 2018 the Working group for development, management and implementation of RAP and the whole process started. The draft version was discussed within the Working group and written by September 2018. After the Public Hearing and minor revisions, the RAP has been published on December 27th of 2018 (OG 118/18) and it describes planned activities within 5 years period (2019-2024). The long-term goal of this and following RAPs is to reduce radon exposure in dwellings, public buildings (schools, kindergartens, hospitals, etc.), underground workplaces and workplaces in radon priority areas and consequently risk of lung cancer from radon within global population in Croatia. In order to achieve this goal, following activities will be necessarily performed in the next 5 years: continuing of systematic indoor radon measurements in schools and kindergartens and designing and conducting of national indoor radon survey in dwellings ; performing radon measurements at underground workplaces (mostly touristic caves), developing a number of protocols and guidelines (i.e., for radon in soil gas and soil permeability and other measurements ; protocols for reducing radon concentrations in dwellings and public buildings with elevated radon levels, as well as for preventing radon ingress in new dwellings and workplaces) ; a development of different radon maps which will be used for different purposes. Furthermore, developing and implementing of the Communication Plan to increase public and other stakeholders (teachers, local government, health, construction and other institutions) awareness of the risks of radon, developing criteria for definition of radon priority areas and developing and managing national radon database is also planned in this period. The RAP presents a long- term strategy for reducing radon exposure and consequently radon-induced lung cancer. Its near- term goals are described in this first five-year (2019- 2024) plan that offer bold and important milestones, but they are not the endpoints. The ultimate goal is to reduce radon-induced lung cancer at achievable level by incorporating radon measurements, radon mitigation and radon- resistant construction into the national legislations that govern constructing and renovating homes, schools, kindergartens and other buildings, using simple and proven technologies.