Radionuclide particles in ground level air in Sweden during 2009
Publish date: 2010-10-29
Report number: FOI-R--3046--SE
Pages: 17
Written in: English
Keywords:
- Airborne radionuclides
- deposition
- 7Be
- 137Cs
Abstract
Filtering of ground level air is performed continuously at six different locations in Sweden: Kiruna, Umeå, Gävle, Kista, Visby and Ljungbyhed. The filters are pressed into weekly samples and the contents of different radionuclides are measured by gamma spectroscopy. Precipitation is also collected at four of the stations: Kiruna, Gävle, Kista and Ljungbyhed. The samples are ashed and the contents of radionuclides are measured. Weekly activity concentrations of Be-7 and Cs-137 during 2009 in air and precipitation are presented for the different stations. Other antropogenic radionuclides detected are also presented. During week 47, 2009 increased levels of 137Cs were detected in Kista. A special analysis of this detection together with meteorological calculations for this week is presented in the Appendix I.