New Silicotitanate Waste Forms; Development and Characterization

Balmer, Mari Lou ; Nenoff, Tina ; Navrotsky, Alexandra ; Su, Yali

Pacific Northwest National Laboratory (U.S.)

关键词: 12 Management Of Radioactive Wastes, And Non-Radioactive Wastes From Nuclear Facilities;    Waste Forms;    37 Inorganic, Organic, Physical And Analytical Chemistry;    Kinetics;    Melting;   

DOI  :  10.2172/829961
RP-ID  :  EMSP-60345--2000
RP-ID  :  FG07-97ER45674
RP-ID  :  829961

美国|英语

来源: UNT Digital Library

【 摘 要 】

The objective of this program is to identify new waste forms and disposal strategies specific to crystalline silicotitanate (CST) secondary waste that is generated from cesium and strontium ion exchange processes. Waste forms that are developed in this work will offer an alternative to current disposal plans. The goals of the program are to reduce the costs associated with CST waste disposal, minimize the risk of contamination to the environment during CST processing, and provide DOE with technical alternatives for CST disposal. The technical objectives of the proposed work are to (1) fully characterize the phase relationships, structures, and thermodynamic and kinetic stabilities of crystalline silicotitanate waste forms and (2) establish a sound technical basis for understanding key waste form properties, such as melting temperatures and aqueous durability, based on an in-depth understanding of waste form structures and thermochemistry.