CSTR:11738.11.NCDC.NIEER.DB2790.2023
10.12072/ncdc.nieer.db2790.2023
<pre><code> <p>&emsp;&emsp; The continuous heat release from spent fuel in high-level radioactive waste repository has an important impact on the stress field, seepage field and long-term stability of surrounding rock. The thermal parameters of the surrounding rock depend on the mineral composition, porosity and pore fluid of the rock, and accurate values are the prerequisite for the multi field coupling analysis of the geological repository of high-level radioactive waste.
Based on the meso mechanical analysis, the method for determining the equivalent thermal parameters (heat capacity, thermal conductivity, thermal expansion coefficient) of surrounding rock is established. Based on Biot's porous media theory, a three field coupling model of stress temperature seepage is established. Then, a numerical simulation method for the stress seepage temperature coupling of surrounding rock of high-level radioactive waste repository is proposed. Finally, the numerical simulation method is verified by COMSOL Multiphysics multi field coupling software and the field test data of temperature seepage stress multi field coupling of surrounding rock in the underground laboratory of Mont Terri high-level radioactive waste in Switzerland.
<pre><code> <p>&emsp;&emsp; The data comes from the calculation of Comsol numerical simulation software.
<pre><code> <p>&emsp;&emsp; Through COMSOL Multiphysics multi field coupling software, the simulation verification is carried out by using the temperature seepage stress multi field coupling field test data of the surrounding rock of the Swiss Mont Terri high-level radioactive waste underground laboratory.
<pre><code> <p>&emsp;&emsp; The data quality is good.
| # | number | name | type |
| 1 | 2018YFC0809600 | National key R & D plan |
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