Hostname: page-component-5c6d5d7d68-7tdvq Total loading time: 0 Render date: 2024-08-16T01:47:42.676Z Has data issue: false hasContentIssue false
  • English
  • Français

Modelling Studies of the Sorption of Uranium and Plutonium in the far Field of A Nuclear Waste Repository

Published online by Cambridge University Press:  28 February 2011

K.A. Bond ,
A. Haworth ,
S.M. Sharland ,
A.C. Smith  and
C.J. Tweed
K.A. Bond
Affiliation:
Radwaste Disposal R&D Division, AEA Decommissioning and Radwaste, Harwell Laboratory, Oxon, OX11 ORA, U.K.
A. Haworth
Affiliation:
Radwaste Disposal R&D Division, AEA Decommissioning and Radwaste, Harwell Laboratory, Oxon, OX11 ORA, U.K.
S.M. Sharland
Affiliation:
Radwaste Disposal R&D Division, AEA Decommissioning and Radwaste, Harwell Laboratory, Oxon, OX11 ORA, U.K.
A.C. Smith
Affiliation:
Radwaste Disposal R&D Division, AEA Decommissioning and Radwaste, Harwell Laboratory, Oxon, OX11 ORA, U.K.
C.J. Tweed
Affiliation:
Radwaste Disposal R&D Division, AEA Decommissioning and Radwaste, Harwell Laboratory, Oxon, OX11 ORA, U.K.
Get access

Abstract

Models of the transport of sorbing radioelements through geological materials have been developed. These models couple a surface-complexation model of sorption processes with transport simulations in the CHEQMATE code. The chemical model has been shown to reproduce trends observed in batch sorption experiments. This approach may ultimately be used to investigate possible limitations to the use of models using simple Kds in repository safety-assessments. The main aim of the study reported in this paper is to increase confidence in the use of the coupled models. Simulations of through-diffusion experiments of uranium with London clay and plutonium with sandstone are presented. In both cases gluconate is present, as a simulant of organic degradation products of cellulose likely to be present in a low- or intermediate-level waste repository.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 212: Symposium P – Scientific Basis for Nuclear Waste Management XIV , 1990 , 585
Copyright
Copyright © Materials Research Society 1991

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Berry, J.A., Baston, G.M.N., Bond, K.A., Ferguson, D.R., Littleboy, A.K. and Pilkington, N.J., ‘Experimental Studies of the Effects of Organic Materials on Radionuclide Sorption’, Presented at ‘Migration ‘89’, Monterey CA. (1989) to be published in Radiochimica Acta.Google Scholar
2. Haworth, A., Sharland, S.M., and Tweed, C.J., ‘A Guide to the Coupled Chemical Equilibria/Migration Code CHEQMATE’, U.K.Nirex Report NSS-R113, 1988.Google Scholar
3. Brown, P.L., Haworth, A., Sharland, S.M. and Tweed, C.J., ‘Modelling Studies of the Sorption of Radionuclides in the Far Field of a Nuclear Waste Repository’ presented at Migration ’89, Monterey CA, to be published in Radiochimica Acta.Google Scholar
4. Bond, K A, Cross, J E and Ewart, F T, ‘Thermodynamic Modelling of Uranium (VI) Sorption onto London Clay’, U.K.Nirex Report NSS/R207, 1990.Google Scholar
5. Brown, P.L., Haworth, A., Sharland, S.M. and Tweed, C.J., ‘HARPHRQ: AN Extended Version of the Geochemical Code PHREEQE’, U.K. Nirex Report NSS-R188, to be published.Google Scholar
6. Parkhurst, D.L., Thorstenson, D.C., Plummer, L.N., Report U.S. Geological Survey, Water Resources Investigations 80-96, National Technical Information Services Technical Report PB81-167801,1980, Revised 1985.Google Scholar
7. Cross, J.E. and Ewart, F.T., ‘HATCHES - A Thermodynamic Database Management System’, presented at Migration ’89, Monterey CA.,(1989) To be published Radiochimica Acta 1990.Google Scholar
8 Berry, J A., Personal CommunicationGoogle Scholar
9. Brown, P.L., Cross, J.E., Linklater, C.M. and Moreton, A., ‘The simulation of radio-element sorption onto ferric floe’, Harwell Laboratory Report AERE R13772, to be published 1990.Google Scholar
10. Sanchez, A., Murray, J. and Sibley, T., ‘The adsorption of plutonium (IV) and (VI) on goethite’ Geochimica et Cosmochimica Acta 49, 2297-2307, 1985 Google Scholar
11. Kim, J.I., ‘Geochemistry of Actinides and Fission Products in Natural Aquifer Systems’, in CEC Mirage Progress report to be published as EUR 12858 EN, 1990.Google Scholar