Journal of Shanghai University(Natural Science Edition) ›› 2013, Vol. 13 ›› Issue (5): 520-526.doi: 10.3969/j.issn.1007-2861.2013.05.015

• Civil Engineering • Previous Articles     Next Articles

Influence of Heat Source on Near Field Behavior of Nuclear Waste Repository

QIN Ai-fang, WANG Hai-tang, ZHAO Xiao-long   

  1. Department of Civil Engineering, Shanghai University, Shanghai 200072, China
  • Received:2012-09-12 Online:2013-10-28 Published:2013-10-28

Abstract: A model test for high-level radioactive nuclear waste repository is carried out. An axisymmetric model for nuclear waste repository of bentonite and rock in the near-field of the nuclear waste repository is established. Considering the thermo-hydro-mechanical (THM) coupled process, temperature field, seepage field and stress field in the near-field after closure of nuclear waste repository, numerical simulation of fully coupled THM is done by using the finite element method (FEM) software Code-Bright with a proper choice of THM constitutive equation. By comparison of different initial heat sources, temperatures of bentonite and rock, liquid saturation, suction and variation of stress in the near field after closure of repository are obtained. The results show that the lower the quantity of initial heat, the better the properties of bentonite and rock.

Key words: Code-Bright, nuclear waste repository, thermo-hydro-mechanical (THM) coupling, bentonite

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