In this study, to replace the ‘J-slot joint’, a joint device between a disposal canister and an emplacement jig in Deep Borehole Disposal process, a novel joint device was designed and tested. The novel joint device was composed of a wedge on top of a disposal canister and a hook box at the end of a winch system. The designed joint device had merits in that it can recombine an emplaced canister freely without the replacement of the joint component. Moreover, it can be applied to various emplacement jigs such as drill pipes, wire-lines, and coiled tubing. To demonstrate the designed joint device, the joint device (Φ 110 mm, H 148 mm), a twin canister string (Φ 140 mm, H 1,105 mm), and a water tube (Φ 150 mm, H 1,500 mm) as a borehole model were manufactured at 1/3 scale. As deployment muds, Na-type bentonite (MX-80) and Ca-type (GJ II) bentonite muds were prepared at solid contents of 7wt% and 28wt%, respectively. The manufactured joint device showed good performance in pure water and viscous muds, with an operation speed of 10 m·min-1. It was concluded that the newly developed joint device can be used for the emplacement and retrieval of a deep disposal canister, below 3~5 km, in the future.

1. 서론
 2. 선행 연구
  2.1 정치 방안
  2.2 정치공정에서의 고려사항
  2.3 정치 중 사고
  2.4 J-slot joint와 자유낙하
  2.5 정치용 머드
 3. 설계와 제작
  3.1 설계
  3.2 제작
  3.3 머드 배합비
 4. 실험
  4.1 정치용 머드
  4.2 정치 시험
 5. 결론
 REFERENCES

• Minsoo LEE(한국원자력연구원) | 이민수 Corresponding Author
• Jongyoul LEE(한국원자력연구원) | 이종열
• Sung-Hoon JI(한국원자력연구원) | 지성훈