Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT) (방사성폐기물학회지)

Korean Radioactive Waste Society (한국방사성폐기물학회)
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Experimental Data Analysis During Initial In-DEBS Operation

  • Choi, Young-Chul (Korea Atomic Energy Research Institute) ;
  • Cho, Won-Jin (Korea Atomic Energy Research Institute) ;
  • Lee, Jae Owan (Korea Atomic Energy Research Institute) ;
  • Kim, Geon Young (Korea Atomic Energy Research Institute)
  • 최영철 (한국원자력연구원) ;
  • 조원진 (한국원자력연구원) ;
  • 이재완 (한국원자력연구원) ;
  • 김건영 (한국원자력연구원)
  • Published : 2019.04.30
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Abstract

This paper is intended to describe the field experimental data obtained from the initial operation of In-DEBS (Engineering scale in-situ demonstration of engineered barrier system), which is installed to analyze the THM (thermal, hydro, and mechanical) coupled behavior of engineered barrier system. On the top, which is plugged with concrete, heat is generated during the curing process of concrete. The heat affects the buffer and the near-field rock. The temperature of the buffer and the near field rock becomes less and less farther away from the plugging. Sensors and measurement system were verified using these phenomena. To protect the measurement system, the heater temperature was gradually increased to 100°C over one week, and the temperature of the heater surface was maintained at the target temperature. After heater operation, the temperature of the buffer reached the steady state in about four days, and the relative humidity increased and gradually decreased after a certain period of time. Also, the total pressure of the buffer was increased by swelling due to groundwater saturation. After the heater was started, it was observed that the temperature and displacement of the near-field rock continued to increase.

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Acknowledgement

이 논문은 과학기술정보통신부의 재원으로 시행하는 한국연 구재단의 원자력기술개발사업의 지원으로 수행되었습니다 (과제번호: NRF-2017M2A8A5014857).