Radiation chemistry in solvent etxraction: FY2011 research

Mincher, Bruce J. ; Mezyk, Stephen P. ; Martin, Leigh R.

Idaho National Laboratory

关键词: Radiolysis;    Free Radicals;    Irradiation;    Dose Rates;    Dtpa;   

DOI  :  10.2172/1042355
RP-ID  :  INL/EXT-11-23414
RP-ID  :  DE-AC07-05ID14517
RP-ID  :  1042355

美国|英语

来源: UNT Digital Library

【 摘 要 】

This report summarizes work accomplished under the Fuel Cycle Research and Development (FCR&D) program in the area of radiation chemistry during FY 2011. The tasks assigned during FY 2011 included: (1) Continue measurements free radical reaction kinetics in the organic phase; (2) Continue development of an alpha-radiolysis program and compare alpha and gamma radiolysis for CMPO; (3) Initiate an effort to understand dose rate effects in radiation chemistry; and (4) Continued work to characterize TALSPEAK radiation chemistry, including the examination of metal complexed ligand kinetics. Progress made on each of these tasks is reported here. Briefly, the method developed to measure the kinetics of the reactions of the NO3 radical with solvent extraction ligands in organic solution during FY10 was extended here to a number of compounds to better understand the differences between radical reactions in the organic versus aqueous phases. The alpha-radiolysis program in FY11 included irradiations of CMPO solutions with 244Cm, 211At and the He ion beam, for comparison to gamma irradiations, and a comparison of the gamma irradiation results for CMPO at three different gamma dose rates. Finally, recent results for TALSPEAK radiolysis are reported, summarizing the latest in an effort to understand how metal complexation to ligands affects their reaction kinetics with free radicals.