Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Water Balance Evaluation of Final Closure Cover for Near- surface Radioactive Wastes Disposal Facility

  • Keunmoo Chang (Korea Electric Power Corporation Nuclear Environment Technology Institute) ;
  • Park, Joo-Wan (Korea Electric Power Corporation Nuclear Environment Technology Institute) ;
  • Yoon, Jeong-Hyoun (Korea Electric Power Corporation Nuclear Environment Technology Institute) ;
  • Park, Heui-Joo (Korea Electric Power Corporation Nuclear Environment Technology Institute) ;
  • Kim, Chang-Lak (Korea Electric Power Corporation Nuclear Environment Technology Institute)
  • Published : 2000.06.01
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Abstract

The simulation of water balance was conducted for suggested four alternative multi-layer cover design of near-surface radioactive waste disposal facility under domestic climate condition. The analysis was also conducted for the most favorable one out of four alternative cover design under conservative scenarios. Until 100 years after closure of disposal vault, the infiltration flux for the most favorable cover design was negligible even under doubling of the ambient precipitation condition. When the degradation of asphalt and geomembrane after 100 years of closure was considered, the infiltration flux significantly increased almost to the design criteria of cover system in I' Aube disposal facility. And it was found that the hydraulic conductivity of bentonite/sand as a bottom barrier should be no greater than 1$\times$10$^{-7}$ cm/sec recommended by U.S. EPA.

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References

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