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The kinetic and radiolytic aspects of control of the redox speciation of neptunium in solutions of nitric acid

Creator:

Precek, Martin

Abstract:

Neptunium, with its rich redox chemistry, has a special position in the chemistry of actinides. With a decades-long history of development of aqueous separation methods for used nuclear fuel (UNF), management of neptunium remains an unresolved issue because of its not clearly defined redox speciation. Neptunium is present in two,...

Resource Type:

Dissertation

Full Text:

Martin Precek for the degree of Doctor of Philosophy in Chemistry presented on August 29, 2012
The redox chemistry of neptunium in γ-irradiated aqueous nitric acid in the presence of an organic phase

Creator:

Mincher, Bruce J., Precek, Martin, and Paulenova, Alena

Abstract:

The radiolytic changes in oxidation state for solutions of initially Np(V) and/or Np(VI) were investigated by gamma-irradiation in conjunction with UV/Vis spectroscopy of the aqueous phase. Samples were irradiated in varying concentrations of nitric acid, and with or without the presence of 30 % TBP in dodecane. At short irradiation...

Resource Type:

Article

Full Text:

. Mincher BJ, Precek M, Mezyk SP, Elias G, Martin LR, Paulen- ova A (2013) The redox chemistry of neptunium