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Radon Mapping in Savran Region, Odessa Oblast, Ukraine

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Radon Mapping in Savran Region, Odessa Oblast, Ukraine Radon Mapping in Savran region, Odessa Oblast, Ukraine Britt-Marie Ek (SGU), Olga German (Vattenfall AB) mars 2012 Appendix 4.7 Savran district, SGU-rapportmeasurement s2012:9 of radon in soil gas with MARKUS10, 70 cm depth Diarie-nr: 08-221/2010 (! (! (! (! (! (! (! (! (! (! (! (! (! (! (!(! (! (! (!(! (! (! (! (! (! (! (! (! (! (! (! (! (! (! (! (! (! (! (!(! (! (! (! (! (!(!(! (! (! (! ! (! (! (! (! (! (!(! (!(! (! (! (! (! (! (! (! (! (! (! (! (! Legend 0 5 10 Kilometers Radon kBq/m3 (! < 10,0 (! 10,1 - 20,0 (! 20,1 - 40,0 (! 40,1 - 60,0 (! 60,1 - 81,0 ”Detta dokument har producerats med finansiellt stöd av Styrelsen för internationellt utvecklingssamarbete (Sida). De åsikter som framförs ger inte nödvändigtvis uttryck för Sidas officiella uppfattning.” Sveriges geologiska undersökning Box 670, 751 28 Uppsala tel: 018-17 90 00 fax: 018-17 92 10 e-post: [email protected] www.sgu.se SUMMARY A project with the aim to reduce doses from radon gas and natural radiation to the Ukrain- ian population has been held in Odessa and the Savran district. The project has involved training courses and transfer of knowledge. This report describes the training activities during 2010 and 2011 in Odessa and the Savran district. Swedish and Ukrainian experts from SSM, SGU, Marzeev Institute of Hygiene and Medical Ecology, and Odessa region Sanitary Epidemiological Service took part in the pro- ject. Field investigations have been performed in the Savran district with measurements in all villages. Gamma spectrometers were used to measure the uranium, thorium and potassium concentration in soils and emanometers were used to measure radon in soil gas. The results of the measurements are considered representative for Ukrainian soils. The measurements showed that sandy soils have very low concentrations of the naturally occurring radioactive elements while clayey and silty soils have normal to slightly enhanced concentrations. Measurements of radon gas indoors were performed in the winter of 2010 in all villages in the Savran district. The results show that the radon levels are lower in houses in areas with sandy soils e.g. along the Savran river. In the areas with clayey chernozems the radon levels are higher, often above the limit of Equilibrium Volume concentration of 200 Bq/m3. 1 (43) 2 (43) INNEHÅLL SUMMARY ......................................................................................................................................................................... 1 Background ...................................................................................................................................................................... 4 Basic information .......................................................................................................................................................... 4 Radon and natural radioactive elements .................................................................................................... 4 Radon in indoor air ......................................................................................................................................... 6 Geology and radon sources ..................................................................................................................................... 6 Bedrock .............................................................................................................................................................. 6 Soils .................................................................................................................................................................... 7 Radioactive elements in water ...................................................................................................................... 7 Short overview of Ukrainian geology ............................................................................................................... 7 Crystalline basement and sedimentary bedrock ...................................................................................... 8 Quaternary deposits ....................................................................................................................................... 8 Top soils ............................................................................................................................................................. 8 Radon risk mapping ..................................................................................................................................................... 9 Savran Pilot region ....................................................................................................................................................... 10 Training in Odessa ......................................................................................................................................... 10 Methods ............................................................................................................................................................. 10 Classification .................................................................................................................................................... 13 Geological setting of the Savran district .................................................................................................... 14 Pilot mapping in Savran September 2010 ................................................................................................. 17 Continued mapping in Savran May 2011 ................................................................................................. 18 Results ................................................................................................................................................................................. 19 Indoor measurements ..................................................................................................................................... 19 Conclusions and recommendations ................................................................................................................... 21 Literature ........................................................................................................................................................................... 22 Abbreviations .................................................................................................................................................................. 24 Appendix 1 ........................................................................................................................................................................ 25 Program ............................................................................................................................................................. 25 Програма ......................................................................................................................................................... 25 Appendix 2 ........................................................................................................................................................................ 28 Results from field measurements in the Savran district. Appendix 3 ........................................................................................................................................................................ 33 Results from radon measurements in Savran district. Appendix 4 ........................................................................................................................................................................ 34 Maps Appendix 5 ........................................................................................................................................................................ 41 Coordinates for field localities (Degrees and minutes) Appendix 6 ........................................................................................................................................................................ 42 Indoor radon concentration of rural dwellings in the Savran district, Odesskya Oblast 3 (43) BACKGROUND The SSM Project 2009/610 Reduction of lung cancer risks caused by exposure to radon gas and natural radiation has its aim to reduce doses to the Ukrainian population exposed to radon gas and natural radiation by transferring knowledge on methods for measurement and analyses, methods for actions against exposure, and adoption of EU directives and recom- mendations for radon gas and exposure to natural radiation. The project was performed by experts of the Marzeev Institute of Hygiene and Medical Ecology, NAMS in Kiev, Swedish Radiation Safety Authority and Geological Survey of Sweden. The Swedish International Development Cooperation Agency provided funding through the contract with SSM. This report describes the training activities during 2010 and 2011 in Odessa and the Savran district. Swedish and Ukrainian experts from SSM, SGU, IHME, and Odessa region SES took part in the project. Measurements of radon gas activity were done in a number of houses, schools and preschools during the winter of 2010–2011 with radon track detectors. Houses were randomly chosen to represent all villages in the Savran district. The aim for this part of the project was: In a pilot study, to produce a radon risk map for the Savran district and that the results can be used in a strategy for further actions in Ukraine. BASIC INFORMATION Radon and natural
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