A Prototype Performance Assessment Model for Generic Deep Borehole Repository for High-Level Nuclear Waste 2018-07-30T21:56:01+00:00

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Filename SAND2012-1453C.pdf
filesize 3.22 MB
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Date added October 31, 2014
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Category Advanced Nuclear Energy, Defense Waste Management, ECIS, Energy Security, Nuclear Energy, Nuclear Energy Safety, Posters
report-id SAND2012-1453C
year 2012
author Joon H. Lee, Bill W. Arnold, Peter N. Swift, Teklu Hadgu, Geoff Freeze, Yifeng Wang

A deep borehole repository is one of the four geologic media currently under study by the U.S. DOE to support the development of a
long-term strategy for geologic disposal of high-level nuclear waste. The immediate goal of the generic deep borehole repository study
is to develop the necessary modeling tools to evaluate and improve the understanding of the repository system response and processes
relevant to long-term disposal of the waste in a deep borehole. A prototype performance assessment (PA) model for disposal in a
generic deep borehole has been developed using the approach for a mined geological repository. The preliminary PA results indicate
that soluble, non-sorbing (or weakly sorbing) fission product radionuclides, such as I-129 and Cl-36, are the likely major dose
contributors, and the annual radiation doses to hypothetical future humans may be extremely small. While much work needs to be done
to validate the model assumptions and parameters, the preliminary results highlight the importance of a robust seal design in assuring
long-term isolation, and suggest that deep boreholes may be a viable alternative to mined repositories for disposal of high-level nuclear
waste.