Becker-Heidmann, P., Bauske, B., Scharpenseel, H.-W. (1989): Studies on the migration of 137Cs from the reactor accident of Chernobyl in soils in the region of Hamburg. – In: Gerzabek, M. H. (Hg.): Proceedings of the XIXth ESNA-Conference, S. 87–97. OEFZS-Berichte 4489. Österreichisches Forschungszentrum Seibersdorf, Wien, Österreich
In the region of Hamburg 30 soil profiles have been sampled layerwise and measured by gammaspectrometry. The sites comprise forest as well as agricultural soils, different Soil
orders and texture. From the results for 137Cs and 134Cs the deposition by the Chernobyl fallout and by the atom bomb tests of the fifties are calculated. The recent deposition of 137Cs is between 1300 and 6300 Bq m-2. The maximum of initial penetration of the isotopes into the soil was 15 cm. Few results of a later sampling indicate translocation processes. The possible reasons for the large variations of the results are discussed. For comparability of results between different laboratories a uniform sampling is recommended. The advantages of layerwise sampling are discussed. Dose calculations amount to a maximum of 15 mSv accumulated over the next 50 years, due to external irradiation of 137Cs and 134Cs from the soil surface only. A more realistic estimation gives 0.3 to 0.7 mSv for adults and 0.7 to l mSv for pre-school children.