Diurnal Variations of Radon and Thoron Activity Concentrations and Effective Doses in Dwellings in Niška Banja, Serbia

Radiat Prot Dosimetry. 2013 Dec;157(3):375-82. doi: 10.1093/rpd/nct145. Epub 2013 Jun 25.


In Niška Banja, a spa town in a radon-prone area in southern Serbia, radon ((222)Rn) and thoron ((220)Rn) activity concentrations were measured continuously for one day in indoor air of 10 dwellings with a SARAD RTM 2010-2 Radon/Thoron Monitor, and equilibrium factor between radon and its decay products and the fraction of unattached radon decay products with a SARAD EQF 3020-2 Equilibrium Factor Monitor. Radon concentration in winter time ranged from 26 to 73 100 Bq m(-3) and that of thoron, from 10 to 8650 Bq m(-3). In the same period, equilibrium factor and the unattached fraction varied in the range of 0.08 to 0.90 and 0.01 to 0.27, respectively. One-day effective doses were calculated and were in winter conditions from 4 to 2599 μSv d(-1) for radon and from 0.2 to 73 μSv d(-1) for thoron.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Air Pollutants, Radioactive / analysis*
  • Housing*
  • Humans
  • Radiation Dosage*
  • Radiation Monitoring*
  • Radon / analysis*
  • Radon Daughters / analysis*
  • Seasons*
  • Serbia


  • Air Pollutants, Radioactive
  • Radon Daughters
  • Radon