Incorporating technetium in minerals and other solids: A review

JOURNAL OF NUCLEAR MATERIALS

卷:466

Review

Luksic, Steven A.¹  Riley, Brian J.¹  Schweiger, Michael¹  Hrma, Pavel¹ 

[1] Pacific NW Natl Lab, Richland, WA 99352 USA

关键词: Technetium;    Immobilization;    Waste form;    Vitrification;    Spinel;    Sodalite;    Rutile;    Perovskite;    Pyrochlore;   

DOI  :  10.1016/j.jnucmat.2015.08.052

来源: Elsevier

【 摘 要 】

Technetium (Tc) can be incorporated into a number of different solids including spinel, sodalite, rutile, tin dioxide, pyrochlore, perovskite, goethite, layered double hydroxides, cements, and alloys. Synthetic routes are possible for each of these phases, ranging from high-temperature ceramic sintering to ball-milling of constituent oxides. However, in practice, Tc has only been incorporated into solid materials by a limited number of the possible syntheses. A review of the diverse ways in which Tc-immobilizing. materials can be made shows the wide range of options available. Special consideration is given to hypothetical application to the Hanford Tank Waste and Vitrification Plant, such as adding a Tc-bearing mineral to waste glass melter feed. A full survey of solid Tc waste forms, the common synthesis routes to those waste forms, and their potential for application to vitrification processes are presented. The use of tin dioxide or ferrite spinet precursors to reduce Tc(VII) out of solution and into a durable form are shown to be of especially high potential. (C) 2015 Elsevier B.V. All rights reserved.

【 授权许可】

Free