PROBLEMS OF COMPLIANCE OF THE RADIONUCLIDS CONTENT IN FUEL WOOD WITH THE HYGIENIC REGULATIONS IN NORTHERN DISTRICTS OF KYIV AND ZHYTOMYR REGIONS
Journal Title: Наукові доповіді НУБіП України - Year 2018, Vol 1, Issue 1
Abstract
In 2017, a concurrent selection of soil and wood samples from the most contaminated as a result of the accident at the Chornobyl Nuclear Power Plant of Ukraine (Kyiv and Zhytomyr regions) was conducted. In all selected samples activity of 137Cs and 90Sr was measured, using the standard methods of gamma-, beta- spectrometry and radiochemistry. It was found that the specific activities of 137Cs and 90Sr in the 20-centimeter layer of forest soils were in the range from 74±15 to 6380±64 Bq/kg, and from 1±0,5 to 65±5,4 Bq/kg, respectively. In wood samples, specific activities of 137Cs and 90Sr ranged from 9 to 744±16 Bq/kg, and from 31±0,5 to 1503±193 Bq/kg, respectively. It has been shown that 90 % of samples of wood exceed SSSAR-2005 by 90Sr (60 Bq/kg), while only 5 % of samples do not meet this norm by 137Cs activity (600 Bq/kg). The performed studies have confirmed the high probability of obtaining wood from radioactive contaminated forest massifs, which does not meet the hygienic norm for fuel wood of the SSSAR-2005. Taking into account the total specific activity of 137Cs and 90Sr in the studied samples of wood and the low ash content of this fuel, it has been concluded that there is a high probability of obtaining an ash residue with a specific activity of studied radionuclides more than 10 kBq/kg that meets the criterion of low-level radioactive waste according to OSPU-2005. The obtained results indicate the need for monitoring of radionuclide contamination of fuel wood and careful radiological control of its use in the territories, affected by the Chornobyl accident. It also proves the need for further research.
Authors and Affiliations
L. M. Oretshko, L. V. Yoshchenko, S. V. Polishchuk, O. V. Kosarchuk
Keywords
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