고준위폐기물 심부시추공 처분을 위한 처분용기 접속장치의 개발 = Development of Novel Joint Device for a Disposal Canister in Deep Borehole Disposal

다국어 초록 (Multilingual Abstract)

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 (${\Phi}110mm$, H 148 mm), a twin canister string (${\Phi}140mm$, H 1,105 mm), and a water tube (${\Phi}150mm$, 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 $10m{\cdot}min^{-1}$. 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.

참고문헌 (Reference)

1 T. Harrison, "Very deep borehole; Deutag's opinion on boring, canister emplacement and retrievability, Swedish Nuclear Fuel and Waste Management Company Report, R-00-35" 2000

2 K.S. Kim, "State-of-the-Art Report on the Very Deep Borehole Disposal Concept for High-level Radioactive Waste, Korea Atomic Energy Research Institute Report, KAERI/AR-929/2012" 2012

3 B.W. Arnold, "Reference Design and Operations for Deep Borehole Disposal of High-Level Radioactive Waste, Sandia National Laboratory Report, SAND2011-6749" 2011

4 P.V. Brady, "Geological Repository Systems for Safe Disposal of Spent Nuclear Fuels and Radioactive Waste" 2016

5 M.S. Lee, "Evaluation of Silicon Carbide (SiC) as for a Deep Borehole Disposal Canister, Korea Atomic Energy Research Institute Report, KAERI/TR-6907/2017" 2017

6 J.Y. Lee, "Establishment of a deep borehole disposal concept for the highly heat-generating radioactive wastes as an alternative concept, Korea Atomic Energy Research Institute Report, KAERI/TR-7015/ 2017" 2017

7 E. Hardin, "Deep Borehole Disposal Engineering, Sandia National Laboratory Presentation, SAND2015-2867C" 2015

8 H.I. Yoon, "An Analysis on the Application of Deep borehole Drilling Technology, Korea Atomic Energy Research Institute Report, KAERI/CM-2184/2015" 2015