The Research On The Law Of Tide Induced Dispersion Of The Liquid Radioactive Wastes Of Daya Bay Nuclear Power Station And On The Law Of Radionuclide Transfer In The Marine Ecosystems

The major objective of the paper is to develop a mathematical model for tide induced dispersion of radionuclides in the Daya Bay, and radionuclide transfer model in the marine ecosystems.First of all, a two dimensional model to simulate the tide induced dispersion of the liquid radioactive wastes in the Daya Bay has been developed. The hydrodynamic equations are solved and, simultaneously, the two dimensional advection diffusion equation is solved by using Alternating Direction Implicit method. The numerical solutions have been tested by comparing observed and computed values of water level, and tidal velocity. The model gives, in general, a good representation of the tidal action. According to the distribution of the concentration of radionuclide in Daya Bay , a radionuclide transfer model among the marine ecosystems has been developed on the basis of compartment model. The corresponding linear equation groups have been constructed. They give solutions in agreement with observations when measured and computed concentrations in the body of aquatic biology and sediments. Lastly, a three dimensional model to simulate the tide induced dispersion of the liquid radioactive wastes in the Daya Bay has been developed. The model uses normalized sigma coordinates in the vertical so that resolution is not reduced in the shallower regions. The method of prediction and emendation has been used to improve the accuracy of difference mode. The stability of the three dimensional model has been improved by the introduction of artificial resistance items. The difference equation groups have been solved by using pursing method and some elementary numerical solutions have been obtained.