Mutual Separation of Uranium, Plutonium and Fission Products by Gradient Multistage Extraction

SummaryUranium, plutonium and fission products are separated by means of a simple multistage extraction of 20% TBP-carbontetrachloride vs. nitric acid series. In order to enhance the mutual separation, the acidity of the aqueous portions is lowered stepwise. All fission products, plutonium and uranium are obtained in aqueous solutions in the sequence mentioned, leaving no active material in the organic solutions of the extractor. The plutonium fractions contain some fission products and a small amount of uranium. However, uranium is obtained with a fairly high purity. The same organic solutions can be used several times giving more or less the same separated products.

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Effect of the electron decay of metallic fission products on the chemical and phase compositions of an uranium-plutonium fuel irradiated by fast neutrons

Russian Metallurgy (Metally) ◽

10.1134/s0036029511110036 ◽

2011 ◽

Vol 2011 (11) ◽

pp. 1074-1078 ◽

Cited By ~ 4

Author(s):

G. G. Bondarenko ◽

G. S. Bulatov ◽

K. N. Gedgovd ◽

D. Yu. Lyubimov ◽

M. M. Yakushkin

Keyword(s):

Fission Products ◽

Fast Neutrons ◽

Uranium Plutonium ◽

Chemical And Phase Compositions ◽

Plutonium Fuel

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Neptunium extraction by N,N-dialkylamides

Radiochimica Acta ◽

10.1515/ract-2020-0002 ◽

2020 ◽

Vol 108 (9) ◽

pp. 707-716

Author(s):

Jarrod M. Gogolski ◽

Peter R. Zalupski ◽

Travis S. Grimes ◽

Mark P. Jensen

Keyword(s):

Nitric Acid ◽

Solvent Extraction ◽

Radioactive Waste ◽

Partial Oxidation ◽

Acid Solutions ◽

Nitric Acid Solutions ◽

Organic Solutions

AbstractSeparation of neptunium by solvent extraction has been based on tributylphosphate (TBP) for decades, but TBP is not fully incinerable, which adds to the burden of long-lived radioactive waste. Alternatives to TBP for uranium and plutonium extraction, such as the N,N-diakylamides, previously have been explored in the hopes of transitioning to an extractant that is incinerable. Four N,N-diakylamides, N,N-dihexylhexanamide (DHHA), N,N-dihexyloctanamide (DHOA), N,N-di(2-ethylhexyl)butanamide (DEHBA), and N,N-di(2-ethylhexyl)-iso-butanamide (DEHiBA) were considered in this work for their potential to extract millimolar concentrations of Np(IV), Np(V), and Np(VI) from nitric acid solutions into organic solutions containing 1 M extractant in Exxsol D60. Under these conditions the branching of the alkyl substituents affects the extractability of Np(VI) and Np(IV), causing three of the dialkylamides, DHHA, DHOA and DEHBA, to extract neptunium in the expected order Np(VI) > Np(IV) > > Np(V). In contrast, branched DEHiBA is so poor an extractant for Np(IV) that the extraction order becomes Np(VI) > > Np(V) > Np(IV) between 0.1 and 5.6 M HNO3 due to partial oxidation of the Np(V) in nitric acid.

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Purification of Uranium-Plutonium Extract of VVER-1000 Spent Nuclear Fuel from Fission Products by Liquid Chromatography

Atomic Energy ◽

10.1007/s10512-021-00725-8 ◽

2021 ◽

Author(s):

V. I. Volk ◽

L. N. Podrezova ◽

V. N. Alekseenko ◽

A. S. D’yachenko

Keyword(s):

Liquid Chromatography ◽

Nuclear Fuel ◽

Spent Nuclear Fuel ◽

Fission Products ◽

Uranium Plutonium

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Corrosion Behavior of High Purity Vanadium

CORROSION ◽

10.5006/0010-9312-16.2.114 ◽

1960 ◽

Vol 16 (2) ◽

pp. 70t-72t ◽

Cited By ~ 4

Author(s):

DAVID SCHLAIN ◽

CHARLES B. KENAHAN ◽

WALTER L. ACHERMAN

Keyword(s):

Stainless Steel ◽

Nitric Acid ◽

Corrosion Behavior ◽

High Purity ◽

Galvanic Corrosion ◽

Acid Solutions ◽

Ocean Water ◽

Nitric Acid Solutions

Abstract Chemical and galvanic corrosion experiments at 35 C show that ductile vanadium is resistant to corrosion in substitute ocean water. It is also resistant in 60 percent sulfuric and 20 percent hydrochloric acids but corrodes rapidly in nitric acid solutions. Vanadium is less noble than stainless steel and copper and more noble than aluminum, magnesium and steel (SAE 4130) in substitute ocean water. 6.3.18

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Capacitive deionization in organic solutions: case study using propylene carbonate

RSC Advances ◽

10.1039/c5ra20786j ◽

2016 ◽

Vol 6 (7) ◽

pp. 5865-5870 ◽

Cited By ~ 23

Author(s):

S. Porada ◽

G. Feng ◽

M. E. Suss ◽

V. Presser

Keyword(s):

Organic Solvent ◽

Aqueous Solutions ◽

Propylene Carbonate ◽

Capacitive Deionization ◽

Organic Solutions

We present a study of the performance of capacitive deionization (CDI) when applied to electrosorption in an organic solvent, finding enhanced cell charging voltages and improved salt sorption over electrosoprtion in aqueous solutions.

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