Candidate waste forms for immobilisation of waste chloride salt from pyroprocessing of spent nuclear fuel

Vance, E. R. and Davies, J. and Olufson, K and Chironi, I. and Karatchevtseva, I. and Farnan, I. (2012) Candidate waste forms for immobilisation of waste chloride salt from pyroprocessing of spent nuclear fuel. Journal of Nuclear Materials, 420 (1–3). pp. 396-404. ISSN 0022-3115 DOI doi; 10.1016/j.jnucmat.2011.09.020

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Abstract

Sodalite/glass bodies prepared by hot isostatic pressing (HIPing) at ∼850 °C/100 MPa are candidates for immobilising fission product-bearing waste KCl–LiCl pyroprocessing salts. To study the capacity of sodalite to structurally incorporate such pyroprocessing salts, K, Li, Cs, Sr, Ba and La were individually targeted for substitution in a Na site in sodalite (Na vacancies targeted as charge compensators for alkaline and rare earths) and studied by X-ray diffraction and scanning electron microscopy after sintering in the range of 800–1000 °C. K and Li appeared to enter the sodalite, but Cs, Sr and Ba formed aluminosilicate phases and La formed an oxyapatite phase. However these non-sodalite phases have reasonable resistance to water leaching.

Item Type: Article
Uncontrolled Keywords: 2011AREP; IA64;
Subjects: 99 - Other
03 - Mineral Sciences
Divisions: 99 - Other
Journal or Publication Title: Journal of Nuclear Materials
Volume: 420
Page Range: pp. 396-404
Identification Number: doi; 10.1016/j.jnucmat.2011.09.020
Depositing User: Sarah Humbert
Date Deposited: 02 Feb 2012 14:31
Last Modified: 23 Jul 2013 10:03
URI: http://eprints.esc.cam.ac.uk/id/eprint/2355

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