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Improved Radionuclide Transport Models for a Nuclear Waste Repository

Published online by Cambridge University Press:  15 February 2011

Richard B. Codell
Richard B. Codell*
Affiliation:
U.S. Nuclear Regulatory Commission, Washington D.C. 20555
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Abstract

NRC is developing improved models for transport of chain decay radionuclides in porous and fractured/porous media using finite-difference for spatial discretization, and numerical inversion of Laplace transforms for time. This hybrid technique allows great flexibility for spatial variability, flow rate changes and boundary conditions that are difficult with analytical solutions, and are much faster than solutions fully in the time domain. This paper presents the status of NRC's development of a method for transport through fractured porous media at the proposed Yucca Mountain repository, building on the work of a number of authors.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 412: Symposium V – Scientific Basis for Nuclear Waste Management XIX , 1995 , 731
Copyright
Copyright © Materials Research Society 1996

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References

[1] Wescott, R.G., Lee, M.P., McCartin, T.J., Eisenberg, N.A., Baca, R.B., (editors) “NRC Iterative Performance Assessment Phase 2: Development of Capabilities for Review of a Performance Assessment for a High-Level Waste Repository,”, U.S. Nuclear Regulatory Commission, Washington DC, NUREG-1464, 1995.Google Scholar
[2] Olague, N.E., Longsine, D.E., Campbell, J.E., and Leigh, C.D., ”User's Manual for the NEFTRAN II Computer Code”, NUREG/CR-5618, Sandia National Laboratories, 1991.Google Scholar
[3] Hodgkinson, D.P. and Maul, P.R., ”I-D Modelling of Radionuclide Migration through Permeable and Fractured Rock for Arbitrary Length Decay Chains using Numerical Inversion of Laplace Transforms”, Ann. Nuclear Energy, Vol.15, no 4, pp 179–189, 1988.Google Scholar
[4] Gureghian, A.B., “FRAC-SSI: Far-Field Transport of Radionuclide Decay Chains in a Fractured Rock”, Center for Nuclear Waste Regulatory Analyses, San Antonio TX, 1994.Google Scholar
[5] Sudicky, E.A., “The Laplace Transform Galerkin Technique: A Time Continuous Finite Element Theory and Application to Mass Transport in Groundwater”, Water Resources Research, Vol.25, no. 8, pp 1833–1846, 1989.Google Scholar
[6] Li, S.G., Ruan, F., and McLaughlin, D., “A Space-Time Accurate Method for Solving Solute Transport Problems”, Water Resources Research, Vol.28, no 9, pp 2297–2306, 1992.Google Scholar
[7] Sinclair, J.E., Robinson, P.C., Cooper, N.S., Worgan, K.J. and Cliffe, K.A., “MASCOT and MOP Programs for Probabilistic Safety Assessment, Part B: MASCOT (Version 3C) Technical Details”, NIREX Safety Studies Report NSS/336, Part B, Version 3C, 1994.Google Scholar
[8] Talbot, A., “The Accurate Numerical Inversion of Laplace Transforms”, J. Inst. Math. Applications, Vol.23, pp 97–120, 1979.Google Scholar
[9] Dehoog, F.R., Knight, J.H. and Stokes, A.N. “An Improved Method for Numerical Inversion of Laplace Transforms”, SIAM J. Stat. Comput., Vol.3, no. 3, 1982.Google Scholar