Author/Editor		Vaupotič, J; Križman, M; Planinič, J; Kobal, I
Title		Radon level reduction in two kindergartens in Slovenia
Type		članek
Source		Health Phys
Vol. and No.		Letnik 66, št. 5
Publication year		1994
Volume		str. 568-72
Language		eng
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.
Descriptors		AIR POLLUTION, INDOOR AIR POLLUTION, RADIOACTIVE RADON SCHOOLS, NURSERY VENTILATION CHILD, PRESCHOOL SLOVENIA