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Crystalline rocks may be used to host high-level radioactive waste (HLW) repositories. In India, Jalore granite has been potentially chosen as the host rock for the construction of the HLW repository. Many researchers have experimentally conducted the thermomechanical properties of various kinds of granitic rocks at elevated temperatures up to 1000 °C at a constant heating rate. However, its thermomechanical performance at 300 °C temperatures at different heating rates remains unknown. The main objective of this research is to investigate thermomechanical characteristics when determining a potential host rock based on grain size heterogeneity. Since, a very little work has been done in the domain of rock mechanics, particularly in the context of nuclear waste disposal. The rock specimens were heated to 300 °C for 12 h with different heating rates (3, 5, 10, and 15 °C/min) and constant slow cooling inside the tube-type high temperature furnace. The constant slow cooling rate was 0.57 °C /min. To evaluate the feasibility of using two different kinds of Jalore granitoid rocks in this investigation (coarse and fine- grain granites).

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Examining the Thermal Expansion and Thermal Strain of Jalore Granites at Varying Heating Rate for a High-Level Radioactive Waste Disposal Site in India

  • 会议论文

  • 发表日期：

    2025年

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  • Rishabh Dwivedi,
  • Pradeep Kumar Gautam,
  • K. H. Singh,
  • N. N. Sirdesai,
  • T. N. Singh

摘要

Crystalline rocks may be used to host high-level radioactive waste (HLW) repositories. In India, Jalore granite has been potentially chosen as the host rock for the construction of the HLW repository. Many researchers have experimentally conducted the thermomechanical properties of various kinds of granitic rocks at elevated temperatures up to 1000 °C at a constant heating rate. However, its thermomechanical performance at 300 °C temperatures at different heating rates remains unknown. The main objective of this research is to investigate thermomechanical characteristics when determining a potential host rock based on grain size heterogeneity. Since, a very little work has been done in the domain of rock mechanics, particularly in the context of nuclear waste disposal. The rock specimens were heated to 300 °C for 12 h with different heating rates (3, 5, 10, and 15 °C/min) and constant slow cooling inside the tube-type high temperature furnace. The constant slow cooling rate was 0.57 °C /min. To evaluate the feasibility of using two different kinds of Jalore granitoid rocks in this investigation (coarse and fine- grain granites).