title: Radon level reduction in two kindergartens in Slovenia.
abstract: Remedial actions were carried out in two kindergartens with average heating season radon concentrations of about 2,000 Bq m-3. The first kindergarten is built on sedimentary gravel and the second one on fly ash and cinder fill. In both cases, radon accumulated in a sub-floor channel (service tunnel). The channels were opened at both ends. Natural ventilation of the tunnels did not produce a sufficient reduction in radon concentration. A fan was mounted in one kindergarten to ventilate the channel for 20 min three times each day, thus reducing radon levels to an acceptable value.
authors.affiliation: J. Stefan Institute, Ljubljana, Slovenia.
authors.forename: J
authors.initials: J
authors.lastname: Vaupotic
authors.forename: M
authors.initials: M
authors.lastname: Krízman
authors.forename: J
authors.initials: J
authors.lastname: Planinić
authors.forename: I
authors.initials: I
authors.lastname: Kobal
mesh_terms: D016902:Air Pollution, Indoor / Q000517:prevention & control*; D000398:Air Pollution, Radioactive / Q000517:prevention & control*; D002675:Child, Preschool; D006801:Humans; D011886:Radon; D012578:Schools, Nursery; D017524:Slovenia; D014691:Ventilation / Q000379:methods*
chemical_list: D011886:Radon