DEVELOPMENT OF AN IMPROVED TITANATE-BASED SORBENT FOR STRONTIUM AND ACTINIDE SEPARATIONS UNDER STRONGLY ALKALINE CONDITIONS
High-level nuclear waste produced from fuel reprocessing operations at the Savannah River Site (SRS) requires pretreatment to remove {sup 134,137}Cs, {sup 90}Sr, and alpha-emitting radionuclides (i.e., actinides) prior to disposal onsite as low level waste. Separation processes at SRS include the sorption of {sup 90}Sr and alpha-emitting radionuclides onto monosodium titanate (MST) and caustic side solvent extraction of {sup 137}Cs. The MST and separated {sup 137}Cs is encapsulated along with the sludge fraction of high-level waste (HLW) into a borosilicate glass waste form for eventual entombment at a federal repository. The predominant alpha-emitting radionuclides in the highly alkaline waste solutions include plutonium isotopes {sup 238}Pu, {sup 239}Pu, and {sup 240}Pu; {sup 237}Np; and uranium isotopes, {sup 235}U and {sup 238}U. This paper describes recent results evaluating the performance of an improved sodium titanate material that exhibits increased removal kinetics and capacity for {sup 90}Sr and alpha-emitting radionuclides compared to the current baseline material, MST.
- Research Organization:
- Savannah River Site (SRS), Aiken, SC (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- DE-AC09-08SR22470
- OSTI ID:
- 973187
- Report Number(s):
- SRNL-STI-2010-00112; SSTEDS; TRN: US1001708
- Journal Information:
- Separation Science and Technology, Journal Name: Separation Science and Technology; ISSN 0149-6395
- Country of Publication:
- United States
- Language:
- English
Similar Records
Development of an improved sodium titanate for the pretreatment of nuclear waste at the Savannah River Site
FURTHER DEVELOPMENT OF MODIFIED MONOSODIUM TITANATE, AN IMPROVED SORBENT FOR PRETREATMENT OF HIGH LEVEL NUCLEAR WASTE AT THE SAVANNAH RIVER SITE
Related Subjects
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
ACTINIDES
BOROSILICATE GLASS
KINETICS
LIQUID WASTES
PLUTONIUM ISOTOPES
RADIOACTIVE WASTES
RADIOISOTOPES
REMOVAL
REPROCESSING
SAVANNAH RIVER PLANT
SEPARATION PROCESSES
SLUDGES
SODIUM
SOLVENT EXTRACTION
SORPTION
STRONTIUM
TITANATES
URANIUM ISOTOPES
WASTE FORMS
WASTES