A model of Sr-90 distribution in the sea near Daya Bay Nuclear Power Plant in China

作者：Wang Jingyu; Fang Hongwei^*; He Guojian; Huang Lei

来源：Frontiers of Environmental Science and Engineering, 2014, 8(6): 845-853.

DOI：10.1007/s11783-014-0708-3

• distribution coefficient
• Daya Bay
• hydrodynamic
• sediment transport
• radionuclide transport

The impact on the environment of radionuclide release from nuclear power plants has attracted increased attention, especially after the accident at Fukushima Daiichi Nuclear Power Plant in Japan. Based on the mechanisms of adsorption/desorption at solid/liquid interfaces and a surface micromorphology model of sediments, a theoretical expression of the distribution coefficient K-d is derived. This coefficient has significant effects on the distribution of radionuclide in seawater, suspended sediment and seabed sediment. K-d is then used to simulate Sr-90 transport in the sea near the Daya Bay Nuclear Power Plant. The simulation results are compared with field measurements of tidal level, current velocity, suspended sediment concentration and Sr-90 concentrations in the same period. Overall, the simulated results agree well with the field measured data. Thus, the derived expression for K-d is capable of interpreting realistic adsorption/desorption processes. What's more, conclusion is drawn that about 40% Sr-90 released by Daya Bay Nuclear Power Plant will be adsorbed by suspended sediment and 20% by seabed sediment, only about 40% Sr-90 will remain in the sea near Daya Bay Nuclear Power Plant in South China Sea.

• 出版日期2014-12
• 单位清华大学