Abstract: The IAEA SRS-19 model or site specific medium concentration could be used to calculate the nuclide concentration in environment media in terrestrial organisms radiological impact assessment by the ERICA code, so could the XOQDOQ model. The differences of the IAEA SRS-19 model and the XOQDOQ model are compared in this paper. The two models are used to calculate concentration of nuclides in environment media near a Chinese nuclear power plant and to assess terrestrial organisms radiological impact by the ERICA code. It was concluded that the radiation effects on terrestrial organisms near the site were acceptable by using both models in the ERICA code but the result calculated by the XOQDOQ model was larger.

Key words: SRS-19 model, XOQDOQ model, ERICA code, terrestrial organism, radiation effect assessment