Peremyslova L M, Kostiuchenko V A, Popova I Ia, Safronova N G
Radiats Biol Radioecol. 2009 Nov-Dec;49(6):714-20.
This paper presents the results of radioecological study of the Iset River and riverside settlements in 1961-2002. In 1961, specific activity of 90Sr in the Iset River water below the Techa River mouth was 44.4 Bq/l and decreased to 3.2 Bq/l in 2002. Annual Techa River run-offinto the Iset River was, on average, 2 x 10(12) Bq of 90Sr in 2000-2004. Density 90Sr-contamination of floodplain soils decreased downstream the Iset River from 146.1 to 37.1 kBq/m2 near the Iset River mouth. In 1977, 90Sr-specific activity of fish muscles was 18 Bq/kg and decreased to 2 Bq/kg in 2002. An average 90Sr-specific activity in milk in settlements located at distances of 12-26 km from the Techa River mouth was 10.2 Bq/l in 1961 and 1.2 Bq/l in 2001. The rate of 90Sr transfer in chain "floodplain soils --> milk" was 2 x 10(-5) (Bq/l)/(Bq/m2). Annual dietary 90Sr-intake by adult residents of the Iset riverside settlements did not exceed an annual limit of intake in 1964-2002.
本文介绍了1961年至2002年伊塞特河及河边定居点的放射生态学研究结果。1961年，捷恰河口以下伊塞特河水中90锶的比活度为44.4贝可勒尔/升，到2002年降至3.2贝可勒尔/升。2000年至2004年期间，捷恰河平均每年流入伊塞特河的90锶量为2×10¹²贝可勒尔。伊塞特河河漫滩土壤中90锶的污染密度从靠近伊塞特河河口处的146.1千贝可勒尔/平方米向下游降至37.1千贝可勒尔/平方米。1977年，鱼肉中的90锶比活度为18贝可勒尔/千克，到2002年降至2贝可勒尔/千克。在距捷恰河口12至26公里处的定居点，牛奶中90锶的平均比活度在1961年为10.2贝可勒尔/升，2001年为1.2贝可勒尔/升。“河漫滩土壤→牛奶”链中90锶的转移率为2×10⁻⁵（贝可勒尔/升）/（贝可勒尔/平方米）。1964年至2002年期间，伊塞特河边定居点成年居民的90锶年膳食摄入量未超过年摄入限值。
