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 ⁰C for temperature and 0.2 for damage number.