IMPACT OF DIFFERENT FACTORS ON GAS MIGRATION IN THE DISPOSAL CELL OF CONCEPTUAL GEOLOGICAL REPOSITORY FOR HIGH LEVEL RADIOACTIVE WASTE

Authors

  • D. Justinavičius Lithuanian Energy Institute
  • A. Narkūnienė Lithuanian Energy Institute
  • P. Poškas Lithuanian Energy Institute

DOI:

https://doi.org/10.5755/j01.mech.18.6.3172

Keywords:

geological repository, high level radioactive waste, gas migration modelling

Abstract

The numerical modelling results of different factors impact on hydrogen gas migration in the disposal cell of conceptual geological repository for high level radioactive waste is presented in this paper. The assessment of various factors such as self healing of EDZ, different relative permeability function for geological medium, variation of diffusivity factor of dissolved hydrogen,  delay of gas generation, lower intrinsic permeability values for waste interface has been performed. Modelling results showed that decreasing of intrinsic permeability value in the EDZ has major impact on peak pressure. Decreasing of intrinsic permeability value in waste interface closes the preferential flow paths for gaseous hydrogen from disposal cell toward the access drift.

DOI: http://dx.doi.org/10.5755/j01.mech.18.6.3172

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Published

2012-12-28

Issue

Vol. 18 No. 6 (2012)

Section

MECHANICS OF FLUIDS AND GASES

License

The copyright for the articles in this journal is retained by the author(s) with the first publication right granted to the journal. The journal is licensed under the Creative Commons Attribution License 4.0 (CC BY 4.0).