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- Title
Measurements and modelling of 137Cs distribution on ground due to the Chernobyl accident: a 27-y follow-up study in Northern Greece.
- Authors
Clouvas, A.; Xanthos, S.; Kadi, S.; Antonopoulos-Domis, M.
- Abstract
Following the Chernobyl accident, an area of ∼1000 m2 in the University farm of the Aristotle University of Thessaloniki was considered as a test ground for radioecological measurements. The radiocesium deposition in this area, due to the Chernobyl accident, was 20 kBq m−2. The profile of 137Cs in the soil of this area was measured systematically from 1987 to 2012. The form of the profile has changed over the years. During the 1987–2000 period the 137Cs distribution was reproducible by a sum of two exponentials. However, at least since 2005 the 137Cs distribution can be successfully fitted by a single exponential function. The long-time (∼27 y) evolution study of the 137Cs distribution in soil permit one to extract with the use of a simple compartment model, the mean vertical migration velocity of 137Cs. Vertical migration of 137Cs in soil is a very slow process. The mean vertical migration velocity is estimated to be 0.14 cm y−1.The relative good comparison between the time dependence of the 137Cs distribution in soil and the model predictions indicate that the simple model used is realistic.
- Subjects
CHERNOBYL Nuclear Accident, Chornobyl, Ukraine, 1986; NUCLEAR accidents -- Environmental aspects; CESIUM isotopes; VERTICAL distribution (Aquatic biology); SCINTILLATION spectrometry
- Publication
Radiation Protection Dosimetry, 2014, Vol 160, Issue 4, p293
- ISSN
0144-8420
- Publication type
Article
- DOI
10.1093/rpd/nct302