Journal of Jilin University(Earth Science Edition) ›› 2021, Vol. 51 ›› Issue (1): 201-211.doi: 10.13278/j.cnki.jjuese.20190140

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Model Calculation Method of Radionuclide Groundwater Release Flux of Offshore Nuclear Power Plants

Zhu Jun, Li Ting, Chen Chao, Xie Tian, Zhang Aiming   

  1. Key Laboratory of Nuclear Environmental Simulation and Evaluation Technology, China Institute for Radiation Protection, Taiyuan 030006, China
  • Received:2019-07-14 Published:2021-02-02
  • Supported by:
    Supported by the Technology and Industry for National Defence-Nuclear Energy Development Project(2016-08)

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Abstract: In order to quantitatively calculate the release flux of radionuclides to marine environment through groundwater under the situation of drainage pipeline leakage in hilly area, an offshore nuclear power station was taken as an example. Firstly, a three-dimensional topographic geological model was established by using GOCAD software to describe the distribution, denudation,and tendency of strata; Secondly, a three-dimensional hydrogeological model was built with FEFLOW to generalize the characteristics of recharge, runoff,and discharge of groundwater system in hilly area; Finally, the distribution coefficients of 90Sr、137Cs in different groundwater rock and soil media were measured experimentally. After that, the concentration distribution of radionuclides in groundwater after continuous leakage of drainage pipes for 60 a was simulated and calculated. The result shows that the migration velocity of 3H is basically the same as that of groundwater. The maximum concentration of 3H in groundwater is 0.285 0 Bq/L, and the maximum release flux to the receiving water reaches about 526 Bq/d on the 20 000th day. The maximum migration of 90Sr is about 80 m, and the maximum radioactive concentration in groundwater is 0.032 1 Bq/L. 137Cs is retained near the pipeline for a long time because of its strong adsorption capacity, its maximum radioactive concentration in groundwater is 6.840×10-3 Bq/L, and the release flux is 0 Bq/d. Based on the analysis of dispersion uncertainty, the greater the dispersion is, the smaller the maximum radioactive concentration of 3H is in groundwater, and the greater the release flux is to marine environment.

Key words: offshore nuclear power plants, hilly area, groundwater, release flux, radionuclide migration

CLC Number: 

  • X52
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