Standring W J F, Stepanets O, Brown J E, Dowdall M, Borisov A, Nikitin A
Norwegian Radiation Protection Authority, Grini Naeringspark 13, P.O. Box 55, N-1332 Østerås, Norway.
J Environ Radioact. 2008 Apr;99(4):665-79. doi: 10.1016/j.jenvrad.2007.09.005. Epub 2007 Oct 31.
The Ob and Yenisey rivers are major contributors to total riverine discharge to the Arctic Ocean. Several large nuclear facilities discharge into these rivers, which could affect actual and potential discharges of radionuclides to the Arctic region. This article presents new radionuclide concentration and grain-size data resulting from analyses of several sediment samples collected during research cruises in the Ob and Yenisey estuaries and adjacent areas during 2000 and 2001. Results indicate that discharges from the main nuclear facilities do not constitute a major contribution to the level of radioactive contamination in the marine areas studied, though Co-60 was detected at low concentrations in some sediment horizons. However, the aggregate contamination from different sources is not radioecologically significant in sediments within the study area, maximum Cs-137 levels being approximately 80 Bq kg(-1) dry weight.
鄂毕河和叶尼塞河是流入北冰洋的河流总径流量的主要贡献者。有几座大型核设施向这些河流排放，这可能会影响放射性核素向北极地区的实际和潜在排放量。本文展示了2000年和2001年在鄂毕河和叶尼塞河河口及邻近地区进行研究巡航期间采集的几个沉积物样本分析得出的新的放射性核素浓度和粒度数据。结果表明，主要核设施的排放对所研究海域的放射性污染水平贡献不大，尽管在一些沉积物层中检测到了低浓度的钴-60。然而，不同来源的总污染在研究区域内的沉积物中对放射生态学来说并不显著，铯-137的最高水平约为80贝克勒尔/千克干重。
