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http://dx.doi.org/10.7733/jnfcwt.2018.16.2.233

Evaluation of Silicon Carbide (SiC) for Deep Borehole Disposal Canister  

LEE, Minsoo (Korea Atomic Energy Research Institute)
LEE, Jongyoul (Korea Atomic Energy Research Institute)
CHOI, Heuijoo (Korea Atomic Energy Research Institute)
YOO, MalGoBalGaeBitNaLa (Korea Atomic Energy Research Institute)
JI, Sunghoon (Korea Atomic Energy Research Institute)
Publication Information
Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT) / v.16, no.2, 2018 , pp. 233-242 More about this Journal
Abstract
To overcome the low mechanical strength and corrosion behavior of a carbon steel canister at high temperature condition of a deep borehole, SiC ceramics were studied as an alternative material for the disposal canister. In this paper, a design concept for a SiC canister, along with an outer stainless steel container, was proposed, and its manufacturing feasibility was tested by fabricating several 1/3 scale canisters. The proposed canister can contain one PWR assembly. The outer container was also prepared for the string formation of SiC canisters. Thermal conductivity was measured for the SiC canister. The canister had a good thermal conductivity of above $70W{\cdot}m^{-1}{\cdot}K^{-1}$ at $100^{\circ}C$. The structural stability was checked under KURT environment, and it was found that the SiC ceramics did not exhibit any change for the 3 year corrosion test at $70^{\circ}C$. Therefore, it was concluded that SiC ceramics could be a good alternative to carbon steel in application to deep borehole disposal canisters.
Keywords
SiC ceramics; Deep borehole disposal (DBD) system; Disposal canister; Nuclear waste disposal; High level waste;
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Times Cited By KSCI : 1  (Citation Analysis)
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