Study on Transferring and Diffusing of the radioactive nuclidesafter Coastal Nuclear Power Plant Accidentin Coastal Seawater

Abstract

A large amount of radioactive substances have been discharged into the sea during the Fukushima nuclear accident, which did tremendous harm to the marine ecological environment. The progress in study of relocation diffusion and transformation of radionuclide in water from coastal nuclear power plant accident are reviewed in this paper. The factors influencing the diffusion and transformationof radionuclide are discussed and analyzed from discharge source item, characteristic of coastal environment, simulation of radionuclide relocation diffusion. Based on the existing studies and researches, the characteristic of coastal environment and the reactor type of a coastal nuclear power plant in China, a computer systemsimulating the transferring and diffusing of the radioactive nuclides after accident in coastal seawater was designed and developed. The main models of system were introduced, including fluid dynamics model, transportation of sediments model and nuclide transportation model. Keywords-coastal nuclear power; accident condition; transferring of the radioactive nuclides;diffusing of the radioactive nuclides