Long-lived radionuclides in the seabed of the Baltic Sea 
Report of the Sediment Baseline Study of HELCOM MORS-PRO in 2000-2005 
Balt. Sea Environ. Proc. No. 110 
Erkki llus 1 , Jukka Mattila 1 , Sven P. Nielsen 2 , Eia Jakobson 3 , Jürgen Herrmann 4 , 
Visvaldis Graveris 5 , Beata Vilimaite-Silobritiene 6 , Maria Suplinska 7 , Andrey 
Stepanov 8 , Maria Lüning 9 
1 STUK- Radiation and Nuclear Safety Authority, Finland, 2 Ris0 National 
Laboratory, Denmark, 3 Estonian Radiation Protection Centre, 4 Federal Mari 
time and Hydrographic Agency, Germany, 5 Latvian Environment, Geology and 
Meteorology Agency, 6 Lithuanian Environment Protection Agency, 7 Central 
Laboratory for Radiological Protection, Poland, 8 V.G. Khlopin Radium Institute, 
Russia, 9 Swedish Radiation Protection Authority 
Information included in this publication or extracts thereof are free for citation 
on the condition that the complete reference of the publication is given. 
Copyright 2007 by the Baltic Marine Environment Protection Commission 
- Helsinki Commission - 
ISSN 0357-2994 
Editor: Erkki llus, Helsinki, Finland 
Language revision: Janet Pawlak, Charlottenlund, Denmark 
Design and layout: Leena Narhi, Bitdesign, Vantaa, Finland 
Cover photo: Erkki llus 
Photos: Erkki llus