J. Phys. IV France 107 (2003) 1065
Cs-137 and Sr-90 level in diary productsV.L. Petukhov1, T.S. Gorb2, I.V. Petukhov2, Yu.A. Dukhanov1, I.Z. Sevryuk1, S.A. Patrashkov1 and O.S. Korotkevich1
1 Research Institute of Veterinary Genetics and Animal Breeding of Novosibirsk State Agrarian University, 160 Dobrolubov Str., Novosibirsk 630039, Russia
2 Vitebsk State Academy of Veterinary Medicine, 7/11 Dovatora Str., Vitebsk 210602, Belarus
About 70% of radioactive substances fell on the territory of the Byelorussia Republic after the Chernobyl Atom Power Station Disaster. Cs-137 and Sr-90 accumulation dynamics was studied in milk of the cows from the highest polluted Braginsky area. 408 milk samples of Black and White cows were investigated. In 1995 average Cs-137 and Sr-90 levels were 61.00 and 3.73 Bk/dm 3 respectively. Cs-137 and Sr-90 levels exceeded Byelorussia Republic upperlimits RDU - 96 in 10 and 50% of milk samples respectively. After 5 years (by 2000) Cs-137 and Sr-90 levels had become almost 3 and 2 times less (21.70 Bk/dm 3 and 1.72 Bk/dm 3 respectively). Cs-137 and Sr-90 levels exceeded RDU - 96 in 1.5 and 5.5% of milk samples respectively. In the same periods Cs-137 and Sr-90 levels were 7 and 2 times higher than the similar indexes in the relatively clean Novosibirsk area. Thus, radioactive element levels in milk of Black and White cows of the Byelorussia Republic decreased significantly for the past years.
© EDP Sciences 2003