Derivation of an approximate analytical solution for understanding the response characteristics of the EBS

T. Ohi, T. Chiba, T. Nakagawa, T. Takase, T. Nakazawa, Y. Akagi, Kazuya Idemitsu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

To perform a safety assessment for the geological disposal of radioactive waste, it is important to understand the response characteristics of the disposal system. In this study, approximate analytical solutions for steady-state nuclide releases from the engineered barrier system (EBS) of a repository were derived for an orthogonal one-dimensional diffusion model. In these approximate analytical solutions, inventory depletion, decay during migration and the influence of groundwater flow in the excavation damaged zone (EDZ) were considered. These solutions were simplified by the Taylor theorem in order to clearly represent the response characteristics of the EBS. The validity of these solutions was shown by comparison with numerical solutions. The response characteristics of the EBS are useful for identifying target values for important parameters that would have the effect of improving the robustness of system safety. The robustness of the geological disposal system and the reliability of the safety assessment can thus potentially be improved using the approximate analytical solutions.

Original languageEnglish
Title of host publicationScientific Basis for Nuclear Waste Management XXXV
Pages341-348
Number of pages8
DOIs
Publication statusPublished - Dec 1 2012
Event2012 MRS Spring Meeting - San Francisco, CA, United States
Duration: Apr 9 2012Apr 13 2012

Publication series

NameMaterials Research Society Symposium Proceedings
Volume1475
ISSN (Print)0272-9172

Other

Other2012 MRS Spring Meeting
CountryUnited States
CitySan Francisco, CA
Period4/9/124/13/12

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Ohi, T., Chiba, T., Nakagawa, T., Takase, T., Nakazawa, T., Akagi, Y., & Idemitsu, K. (2012). Derivation of an approximate analytical solution for understanding the response characteristics of the EBS. In Scientific Basis for Nuclear Waste Management XXXV (pp. 341-348). (Materials Research Society Symposium Proceedings; Vol. 1475). https://doi.org/10.1557/opl.2012.597