Study of thermo-hydro-mechanical processes at a potential site of an Indian nuclear waste repository

Journal of Earth system science

T N Singh2²  A K Verma1¹  R K Bajpai3³  Sachin Maheshwar1¹ 

[1] Department of Mining Engineering, Indian School of Mines Dhanbad, Dhanbad 826 004, India.$$;Department of Earth Sciences, Indian Institute of Technology Bombay, Powai, Mumbai 400 076, India.$$;Technology Development Division, Nuclear Recycle Group, Bhabha Atomic Research Centre, Mumbai 400 076, India.$$

关键词: THM;    FLAC;    nuclear waste;    underground research laboratory;    HLW.;   

DOI  :  

学科分类：天文学(综合)

来源: Indian Academy of Sciences

【 摘 要 】

A detailed scientific study is required for the disposal of high-level radioactive wastes because they generate extremely high heat during their half-life period. Although, several methods have been proposed for the disposal of nuclear wastes, deep underground repository is considered to be a suitable option.In this paper, field investigation has been done near to Bhima basin of peninsular India. Detailed fracture analysis near the borehole shows very prominent maxima of fractures striking N55°E coinciding with the trace of master basement cover metasediment fault. Physico-mechanical properties of rocks have been determined in the laboratory.The host rock chosen is granite and engineered barrier near the canister is proposed to be clay. A thermo-hydro-mechanical (THM) analysis has been done to study the effect of heat on deformations, stresses and pore-pressure variation in granite and clay barriers. For this purpose, finite difference method has been used. Suitable rheological models have been used to model elastic canister and elasto-plastic engineered barrier and host rock. It has been found that both temperature and stresses at any point in the rockmass is below the design criteria which are 100°C for temperature and 0.2 for damage number.

【 授权许可】

Unknown