Optimal initial condition of a bentonite buffer with regard to thermal behavior in a high-level radioactive waste repository. (December 2018)

• Record Type: Journal Article
• Authors: Kim, Min-Jun; Lee, Seung-Rae; Yoon, Seok; Jeon, Jun-Seo; Kim, Min-Seop
• Is Part Of: Computers and geotechnics. Volume 104(2018)
• Page Start: 109
• Page End: 117
• Publication Date: 2018-12
• Subjects: Deep geological repository -- Compacted bentonite buffer -- Optimization -- Firefly algorithm; Engineering geology -- Data processing -- Periodicals; Soil mechanics -- Data processing -- Periodicals; Rock mechanics -- Data processing -- Periodicals; 624.1510285
• DOI: 10.1016/j.compgeo.2018.08.011
• Languages: English
• ISSNs: 0266-352X

Abstract

Abstract: In this study, a numerical model was established using the coupled relationship between the initial conditions of dry density and thermal–hydraulic properties of the compacted bentonite buffer in high-level waste repositories. In addition, we applied the firefly algorithm to identify the optimal initial condition of the buffer, based on the numerical model. Results showed the minimum peak temperature was 77.89 °C at the optimal initial condition where the dry density was 1683 kg/m 3 . The results were verified using the convergence test and parametric study. This finding gives a guideline for producing a bentonite buffer condition in the design of a repository.