| After the operation of GNPS and LNPS, the major source of radioactive nuclide pollution comes from low radioactive polluted water,, The major objective of this paper was to study the diffuse e rule of radioactive nuclide in ocean environment and the impact of radiation dose to marine biota.Based on the research of former researchers, and the two-dimensional tide diffuse formula from Cartesian Coordinates , by using σ coordinate transformation technique to transform the tide diffuse equations from Cartesian coordinates into the differential equations of σ coordinate transformation, a mass transportation numerical model was built; difference equations of 3D mass transportation was provided. By using the LU method to solve difference equations, a numerical model of radiation dose for five kinds of marine biota. From them, it comes the result of consistency of distributing rule under the 2D and 3D for four kinds of radioactive nuclide (~3H , ~137Cs,~90Sr,~110mAg) in Daya Bay area, and is shown in graphical interfaces. The results of the research shows that: when the Daya Bay nuclear power station on normal operation, only little radioactive nuclide goes into the sea; and liquid waste water has been drained off to the sea, the level is lower than nature background radiation; it wont cause any danger to the water environment and marine biota.
|
PDF Full Text Request