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Title: Thermodynamic Studies to Support Actinide/Lanthanide Separations

This milestone report summarizes the data obtained in FY15 on the complexation of HEDTA with Np(V) and U(VI) in a temperature range from 25 to 70°C. The results show the effect of temperature on the chemical speciation of Np(V) and U(VI) in the modified TALSPEAK Process, and help to evaluate the effectiveness of the process when the operation envelope (e.g., temperature) varies. Eventually, the results from this study will help to achieve a better control of the separation process based on the HEDTA/HEH[EHP] combination.
Authors:
 [1]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Publication Date:
OSTI Identifier:
1229561
Report Number(s):
LBNL--189581
ir:189581; TRN: US1600174
Resource Type:
Technical Report
Research Org:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; TALSPEAK PROCESS; HEDTA; RARE EARTHS; ACTINIDES; TEMPERATURE RANGE 0273-0400 K; TEMPERATURE DEPENDENCE; CONTROL; NEPTUNIUM COMPLEXES; URANIUM COMPLEXES; PHOSPHONIC ACID ESTERS; THERMODYNAMIC PROPERTIES