NSUF 10-216: Investigation of the Thermodynamics of Plutonium/Iron Solubility in Brines Using X-Ray Absorption Spectroscopy

We seek to determine the thermodynamic solubility coefficients of the Pitzer model as they relate to the solutions containing plutonium and iron and characterize the resulting precipitates using synchrotron radiation. Presently information is limited to estimates and information based on oxidation invariant analogs. Performing these experiments using plutonium and doing so at pH and ionic strengths relevant to real world disposal or environmental contamination situations we can improve the models for actinide transport in the environment. This work is well suited for synchrotron radiation studies. XAFS is a proven technique for actinide studies and allows for element specific oxidation state and coordination chemistry information to be determined from low concentration samples with no long range order, something no other technique can accomplish. The collaborators combine extensive experience in actinide chemistry research and XAFS data analysis and experimentation at the MRCAT beamline. Although solubility studies can in principle be extended indefinitely, precipitates suitable for study are expected to be available after approximately 100 days after the start of solubility experiments (early calendar year 2010).

معلومات إضافية

حقل	القيمة
Awarded Institution	Los Alamos National Laboratory
CINR Number	216
Embargo End Date	2026-02-27
Facility Tech Lead	Jeff Terry
NSUF Call	FY 2010 APS
PI	Donald Reed
Project Member	Dr. Daniel Olive, staff - Los Alamos National Laboratory
Project Member	Donald Reed - Los Alamos National Laboratory
Project Type	APS
Publication	Using a spherical crystallite model with vacancies to relate local atomic structure to irradiation defects in ZrC and ZrN Todd Allen, Hasitha Ganegoda, Daniel Olive, Jeff Terry, Yong Yang Journal of Nuclear Materials 475 2016-07-01 https://www.sciencedirect.com/science/article/pii/S0022311516301180
RTE Number	216