Darbe apibendrinami duomenys apie cezio-137 kaupimąsi dirvoje ir jo perėjimą į augalus bei gyvulio organizmą. Pateikti šio izoztopo pasiskirstymo ir kaupimosi įvairiuose gyvulių organuose bei audiniuose dėsniai, apžvelgti įvairūs metodai, mažinantys cezio-137 kaupimąsi ir greitinantys jo pasišalinimą iš gyvulių organizmo bei gyvulininkystės produktų. Tirtas pienas, mėsa, bulvės, grūdai ir geriamasis vanduo iš Šakių rajono. Buvo nustatomas 137Cs savitasis aktyvumas ir bendrieji alfa ir beta aktyvumai. Radiometriniai tyrimai atlikti radiacinės saugos centre. / We have summarized the data concerning accumulation of 137Cs in soil and the transition of the radionuclides to plants and animals. The presented survey gives some information about the distribution and accumuliation of 137Cs in different organs and tissues of animals about the possible methods of reducing the amount of radionuclides in the organism of animals and in products of animal origin. There was tested milk, meat, potatoes, grain and drinking water from Šakiai region. There was instituted the specific activity of 137Cs and general alpha and beta activities. The radiometric tests were performed in the Radiation Protection Centre.

It was being exploratored radiation pollution of fish living in water-cooling basin of Ignalina Nuclear Power Plant (NPP) in master's work. The objectives of work. NPP water-cooling basin's fish. The purpose of work was to estimate fish (Rutilus rutilus ( L.), Abramis brama ( L.), Esox lucius ( L.) and Perca fluviatilis ( L.)) contamination degree with macrobiotic radioisotopes cesium ( 137Cs) and strontium ( 90Sr) of Ignalina Nuclear Power Plant ( NPP) water cooling basin, to point up estimated radio-pollution concentrations dependence from fish capturing period of year, their (fish) varietal particularity, nutritional mode of fish life and compare with fish contamination by macrobiotic radioisotopes in other Lithuanian waters. Methods of work. Gama spectral analysis to estimate 137Cs levels in foodstaffs; 90Sr method estimation in foodstaffs and environmental samples by method of Tcherenkov radiation. The experiment was accomplished in the Laboratory of Environmental Protection – the subdivision of Ignalina NPP in 2004-2005. Samples of fish were delivered for the investigations by three times a year ( by 20 kg for every time (month); by 5 kg of different kind; totally 60 kg). It was being applied that method for statistical evaluation of secured data - calculable marks evaluation of secured results. All findings are on 95 % reliability level. The results of investigations showed, that larger specific activity of ( 137Cs) has been found in Esox lucius ( L.) and Perca... [to full text]