Hydraulic Conductivity of Compact Bentonite With Penetrating Copper Pins

• 발행기관: 한국방사성폐기물학회
• 저자명: Min Soo Lee Min Seop Kim Seok Yoon Jin Seop Kim
• 간행물 정보: 『Journal of Nuclear Fuel Cycle and Waste Technology (JNFCWT)』Vol.23 No.3, 415~422쪽, 전체 8쪽
• 주제분류: 공학 > 공학일반
• 파일형태: PDF
• 발행일자: 2025.09.30

국문 초록

Copper plates are a proposed engineering solution to enhance thermal dissipation from nuclear waste canisters through the surrounding bentonite buffer. However, their long-term effect on the hydraulic integrity of this bentonite buffer is uncertain. This study experimentally investigates the impact of penetrating copper components on the hydraulic conductivity of compact bentonite. We measured the hydraulic conductivity of bentonite blocks penetrated by 0 (control), 5, and 10 copper pins, both at initial saturation and after a 293-day aging period. Initially, hydraulic conductivity decreased from 1.49 × 10⁻13 m·s−1 in the control as the number of pins increased. However, this monotonic trend did not persist; after 293 days, the relationship became non-linear, with the 5-pin block showing the lowest conductivity and the 10-pin block the highest. Crucially, our findings provide no evidence that copper penetration or subsequent corrosion systematically increases hydraulic conductivity. We conclude that the integration of copper plates for thermal management is unlikely to compromise the critical containment function of the bentonite barrier.

목차

1. Introduction

2. Materials and Methods

3. Result and Discussions

4. Conclusion

Conflict of Interest

Acknowledgements

REFERENCES

키워드

Engineered barrier system Hydraulic conductivity Heat dissipation Copper plate Bentonite buffer

참고문헌

• J. Korean Radioact. Waste Soc.
• Korea Atomic Energy Research Institute Technical Report
• Nucl. Eng. Technol.
• J. Nucl. Fuel Cycle Waste Technol.
• Water Resour. Res.
• J. Nucl. Fuel Cycle Waste Technol.
• Appl. Clay Sci.
• J. Rock Mech. Geotech. Eng.
• J. Appl. Phys.