標題: Modeling transient heat transfer in nuclear waste repositories
作者: Yang, Shaw-Yang
Yeh, Hund-Der
環境工程研究所
Institute of Environmental Engineering
關鍵字: Geological repository;High-level nuclear waste;Heat transfer;Analytical solution
公開日期: 30-Sep-2009
摘要: The heat of high-level nuclear waste maybe generated and released from a canister at final disposal sites. The waste heat may affect the engineering properties of waste canisters, buffers, and backfill material in the emplacement tunnel and the host rock. This study addresses the problem of the heat generated from the waste canister and analyzes the heat distribution between the buffer and the host rock, which is considered as a radial two-layer heat flux problem. A conceptual model is first constructed for the heat conduction in a nuclear waste repository and then mathematical equations are formulated for modeling heat flow distribution at repository sites. The Laplace transforms are employed to develop a solution for the temperature distributions in the buffer and the host rock in the Laplace domain, which is numerically inverted to the time-domain solution using the modified Crump method. The transient temperature distributions for both the single- and multi-borehole cases are simulated in the hypothetical geological repositories of nuclear waste. The results show that the temperature distributions in the thermal field are significantly affected by the decay heat of the waste canister, the thermal properties of the buffer and the host rock, the disposal spacing, and the thickness of the host rock at a nuclear waste repository. (C) 2009 Elsevier B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/j.jhazmat.2009.03.068
http://hdl.handle.net/11536/6650
ISSN: 0304-3894
DOI: 10.1016/j.jhazmat.2009.03.068
期刊: JOURNAL OF HAZARDOUS MATERIALS
Volume: 169
Issue: 1-3
起始頁: 108
結束頁: 112
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