Schools are a category of public buildings with a high radon exposure risk, due to their high occupancy factor. In Romania, the elaboration of a methodology for radon measurements in schools is a necessity imposed both by the European legislation and by the relatively high percentage (about 10%) of the mapped territory with a potential increased risk of exposure to the action of ionizing radiation emitted by radon. In order to optimize the design of a national survey aimed to evaluate radon exposure of children in Romanian schools, we conducted a pilot study in two schools in Cluj-Napoca, following the screening measurements carried out in 109 schools and kindergartens from five counties. The specific steps that must be followed were described, taking into account the international protocols and particularities of Romanian territory. The proposed approach could act as a guide for other large buildings and is implicit for the implementation of National Radon Action Plan, approved by HG no. 526/12 July 2018 in accordance with Council Directive 2013/59/EURATOM. The obtained results indicate that a high probability of annual radon concentration above the national reference level is to be expected in schools.

Deva-Hunedoara conurbation is a bipolar structure located in central-western Romania composed of 49 settlements. It is located in the center of Hunedoara County. The long history of industrial activities in the area resulted in an abundance of environmental impacts which has significant negative consequences on the local population. Intense industrial activity, regarded as the base for the urban development of the conurbation, dates back to the 1840’s when the first steel mill was constructed in the region. The main sources of environmental impact are represented by the decaying industrial centres of Hunedoara, Simeria and Călan and the newly developed industrial sites located on the major transport networks. A secondary source of environmental impact is represented by the various small enterprises. Coupled with various other human activities and with the general state of the environment, the impact generated by industry and other economic activities represents a great threat to overall development of the conurbation. In assessing the environmental impact on within the conurbation we proposed the use of the RIAM method with a modified matrix which is best suited for our area of study. With this matrix we assessed the environmental impact of industrial and commercial areas, transportation and utility systems and several other aspects related to human activities (health and safety, unemployment, human density, etc.). For the final interpretation of the environmental impact we used the IDWIM - Inverse Distance Weight Interpolation Method to generate maps of impact.