Author(s): Akira Wada; Minoru Ochiai; Tairyu Takano
Linked Author(s): Akira Wada, Minoru Ochiai
Keywords: Rctic Ocean; Radioactive contamination; Concentration analysis; Scavenging
Abstract: In recent years, research has been underway to clarify the fate of radioactive waste dumped into the Arctic Ocean (especially, the Kara Sea and the Barents Sea). These sea areas are very narrow, shallow and located close to land. Flow analysis which has been conducted by using observation data (water temperature, salinity) and applying a method for obtaining the exchange flow in such a way that the inter-box input and output of salinity, heat and seawater volume was balanced, made it possible to successfully express the actual flow patterns (Wada 1999). In this paper, concentration analysis is conducted on the basis of a release scenario with considerations given to nuclide decay, mixing, scavenging and interaction between undersea particles and the bottom sediment layer. Especially, sensitivity analysis is conducted on Pu239 using distribution coefficients, the concentration of suspended solids (SS) in the ocean, and the settling velocity of suspended load as parameters.