skip to main content

SciTech ConnectSciTech Connect

Title: ZIRCONIUM AND FISSION PRODUCT MANAGEMENT IN THE ALSEP PROCESS

Solvent extraction systems that combine neutral donor extractants and acidic extractants are being investigated to provide a single process solvent for separating Am and Cm from acidic high-level liquid waste, including their separation from the trivalent lanthanides. This approach of combining extractants is collectively referred to as the Actinide-Lanthanide SEParation (ALSEP) process. Managing Zr and other fission products is one of the critical factors in developing the ALSEP process. In this work, a strategy has been developed in which Zr(IV) is extracted into the process solvent, then it is stripped from the solvent after the actinides have been selectively stripped. Molybdenum is strongly extracted into ALSEP solvents. Scrubbing the solvent with a citrate buffer before the actinide stripping step effectively removes Mo. Distribution ratios for Ru and Fe are low for extraction from HNO3, so these components can easily be routed to the high-level waste raffinate.
Authors:
; ; ;
Publication Date:
OSTI Identifier:
1178904
Report Number(s):
PNNL-SA-94499
AF5805010
DOE Contract Number:
AC05-76RL01830
Resource Type:
Conference
Resource Relation:
Conference: Global 2013: International Nuclear Fuel Cycle Conference - Nuclear Energy at a Crossroads, September 29- October 3, 2013 Salt Lake City, Utah
Publisher:
American Nuclear Society, La Grange Park, IL, United States(US).
Research Org:
Pacific Northwest National Laboratory (PNNL), Richland, WA (US)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
ALSEP; HEH[EHP]; actinide separation; lanthanide separation; zirconium