Actinoid radiation chemistry in solvent-extraction systems. 5. Pu(IV) + Zr(IV) in 30% TBP + n-dodecane on. gamma. radiolysis

Journal Article · Tue Sep 01 04:00:00 EDT 1987 · Sov. Radiochem. (Engl. Transl.); (United States)

OSTI ID:5431305

Vladimirova, M V; Fedoseev, D A; Milovanova, A S; Boikova, I A

Spectrophotometric studies have been made on the effects of traces of Zr(IV) (1 x 10/sup -5/, 1 x 10/sup -4/, and 1 x 10/sup -3/ mole/liter) on the radiation chemistry of Pu(IV) in ..gamma..-irradiated solutions of 30% TBP + n-dodecane with concentrations of Pu/sup (IV)/ (C/sub Pu//sup 0/ (IV) of 7.5 x 10/sup -3/ and 1.4 x 10/sup -2/ mole/liter at absorbed doses E/sub ..gamma../ from 2 x 10/sup 4/ to 4.5 x 10/sup 5/ Gy. The Zr(IV) in the Pu(IV) organic solutions prevents the formation of complexes of the latter with DBPA formed by the ..gamma.. radiolysis of TBP. The yields G/sub D/ of DBP complexes of Pu(IV) in the presence of Zr(IV) at concentrations C/sub Zr//sup 0/(IV) of 1 x 10/sup -5/, 1 x 10/sup -4/, and 1 x 10/sup -3/ mole/liter are 0.73 +/- 0.5, 0.5 +/- 0.5 and 0.35 +/- 0.5 molecule/100 eV correspondingly; in the absence of Zr(IV), the values of G for Pu(IV) concentrations from 7 x 10/sup -3/ to 1.4 x 10/sup -2/ mole/liter are 0.9 +/- 0.1 molecule/100 eV. Plutonium precipitates begin to form in the presence of Zr(IV) at higher E/sub ..gamma../ - E/sub ..gamma..//sup s/; at C/sub Pu//sup 0/(IV) of 7.5 x 10/sup -3/ mole/liter and c/sub Zr//sup 0/(IV) of 1 x 10/sup -5/, 1 x 10/sup -4/, and 1 x 10/sup -3/ mole/liter, the E/sub ..gamma../ are correspondingly 1.65 x 10/sup 5/, 1.7 x 10/sup 5/ Gy. At C/sub Pu//sup 0/(IV) = 1.1 x 10/sup -2/ mole/liter and C/sub Zr/(IV) = 3.3 x 10/sup -4/ mole/liter, E/sub ..gamma../ is 3.5 x 10/sup 5/ Gy, as against 2.5 x 10/sup 5/ Gy in the absence of Zr(IV). The results are discussed from the viewpoint of the interactions of Pu(IV) and Zr(IV) with DBPA and the solubility of the DBP complexes of these metals in the system composed of 30% TBP + n-dodecane.

• OSTI ID: 5431305
• Journal Information: Sov. Radiochem. (Engl. Transl.); (United States), Journal Name: Sov. Radiochem. (Engl. Transl.); (United States) Vol. 29:1; ISSN SVRDA
• Country of Publication: United States
• Language: English

Related Subjects

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38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600 -- Radiation Chemistry
ABSORPTION SPECTRA
ACTINIDE COMPLEXES
ACTINIDE COMPOUNDS
ACTIVATION ENERGY
ALKANES
BUTYL PHOSPHATES
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CHEMISTRY
COMPLEXES
COMPLEXOMETRY
DBP
DECOMPOSITION
DODECANE
ELECTROMAGNETIC RADIATION
ENERGY
ENERGY SOURCES
ESTERS
EXTRACTION
FUELS
GAMMA RADIATION
HYDROCARBONS
IONIZING RADIATIONS
MATERIALS
NUCLEAR FUELS
OPACITY
OPTICAL PROPERTIES
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
PHOSPHORIC ACID ESTERS
PHYSICAL PROPERTIES
PLUTONIUM COMPLEXES
PLUTONIUM COMPOUNDS
PRECIPITATION
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
RADIOLYSIS
REACTOR MATERIALS
REPROCESSING
SEPARATION PROCESSES
SOLVENT EXTRACTION
SPECTRA
SPECTROPHOTOMETRY
SPENT FUELS
TBP
TRACE AMOUNTS
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENT COMPOUNDS
TRANSURANIUM COMPLEXES
TRANSURANIUM COMPOUNDS
VALENCE
ZIRCONIUM COMPLEXES
ZIRCONIUM COMPOUNDS