scholarly journals The Effects of Nitric Acid on Extraction Properties of TODGA During Fission Product Management

MRS Advances ◽  
2016 ◽  
Vol 2 (10) ◽  
pp. 563-568
Author(s):  
Michael A. Bromley ◽  
Colin Boxall
Keyword(s):  
Nitric Acid ◽  
Spent Nuclear Fuel ◽  
Fission Products ◽  
Product Management ◽  
Extraction Kinetics ◽  
Solvent Phase ◽  
Extraction Properties ◽  
Organic Extractant ◽  
Kinetics Of ◽  
Solvent Extraction Kinetics

ABSTRACTIn the context of management of the wastes arising from the reprocessing of spent nuclear fuel, studies have been conducted into the solvent extraction kinetics of lanthanide fission products by TODGA and the effects of solvent phase acidity on the effectiveness of this organic extractant molecule. In this study we observe an increase in organic phase viscosity increasing acidity and, potentially by consequence, that the rate of cerium extraction is summarily decreased.

scholarly journals The effect of SO3-Ph-BTBP on stainless steel corrosion in nitric acid

Nukleonika ◽  
2015 ◽  
Vol 60 (4) ◽  
pp. 865-869
Author(s):  
Richard J. Wilbraham ◽  
Colin Boxall
Keyword(s):  
Stainless Steel ◽  
Nitric Acid ◽  
Stainless Steels ◽  
Steel Corrosion ◽  
Reductive Dissolution ◽  
Extraction Kinetics ◽  
Weak Absorption ◽  
Solution Interface ◽  
Nuclear Reprocessing ◽  
Kinetics Of

Abstract SO3-Ph-BTBP is a hydrophilic tetra-N-dentate ligand proposed for An(III)/Ln(III) separation by solvent extraction, and a candidate for use in future advanced reprocessing schemes such as GANEX and SANEX. We present the first study of the effect of SO3-Ph-BTBP on the corrosion behavior of stainless steels. Specifically, studies have been performed using steels and conditions equivalent to those found in relevant nuclear reprocessing flow sheets. SO3-Ph-BTBP has been shown to have little effect on either steel passivation or reductive dissolution. However, if driven cathodically into a region of hydrogen evolution at the electrode surface or conversely anodically into a region of transpassive dissolution, observed currents are reduced in the presence of SO3-Ph-BTBP, suggesting corrosion inhibition of the steel potentially through weak absorption of a SO3-Ph-BTBP layer at the metal-solution interface. The lack of any observed corrosion acceleration via complexation of Fe3+ is surprising and has been suggested to be due to the slow extraction kinetics of SO3-Ph-BTBP as a result of a requirement for a trans- to cis-conformational change before binding.

Solvent extraction kinetics of rare earth elements

Talanta ◽  
1996 ◽  
Vol 43 (10) ◽  
pp. 1721-1725 ◽  
Author(s):  
J GAO ◽  
B PENG ◽  
H FAN ◽  
J KANG
Keyword(s):  
Rare Earth ◽  
Solvent Extraction ◽  
Rare Earth Elements ◽  
Extraction Kinetics ◽  
Kinetics Of ◽  
Solvent Extraction Kinetics

Extraction kinetics of Uranium(VI) and Thorium(IV) with Tri-iso-amyl phosphate from nitric acid using a Lewis Cell

2014 ◽  
Vol 302 (3) ◽  
pp. 1069-1076 ◽  
Author(s):  
Xiao-qing Liu ◽  
Fang Kong ◽  
Jia-li Liao ◽  
Song-dong Ding ◽  
Yuan-you Yang ◽  
...  
Keyword(s):  
Nitric Acid ◽  
Extraction Kinetics ◽  
Lewis Cell ◽  
Kinetics Of

Extraction kinetics of uranium(VI) and thorium(IV) with di(1-methyl-heptyl)methyl phosphonate from nitric acid medium using a Lewis cell

2019 ◽  
Vol 217 ◽  
pp. 258-264
Author(s):  
Lianjun Song ◽  
Ying Liu ◽  
Songdong Ding ◽  
Mengling Tan ◽  
Qingnuan Li ◽  
...  
Keyword(s):  
Nitric Acid ◽  
Acid Medium ◽  
Nitric Acid Medium ◽  
Extraction Kinetics ◽  
Lewis Cell ◽  
Kinetics Of

Irradiation behavior of pyrolytic silicon carbide

1983 ◽  
Vol 41 ◽  
pp. 72-73
Author(s):  
R. J. Lauf
Keyword(s):  
Silicon Carbide ◽  
Fission Products ◽  
Thermodynamics And Kinetics ◽  
Neutron Fluences ◽  
Fuel Particles ◽  
Sic Coatings ◽  
Irradiation Behavior ◽  
Kinetics Of ◽  
Htgr Fuel

Fuel particles for the High-Temperature Gas-Cooled Reactor (HTGR) contain a layer of pyrolytic silicon carbide to act as a miniature pressure vessel and primary fission product barrier. Optimization of the SiC with respect to fuel performance involves four areas of study: (a) characterization of as-deposited SiC coatings; (b) thermodynamics and kinetics of chemical reactions between SiC and fission products; (c) irradiation behavior of SiC in the absence of fission products; and (d) combined effects of irradiation and fission products. This paper reports the behavior of SiC deposited on inert microspheres and irradiated to fast neutron fluences typical of HTGR fuel at end-of-life.

Extraction of Am(III) by benzyldibutylamine from nitrate solutions of lanthanides

1981 ◽  
Vol 46 (1) ◽  
pp. 194-200 ◽  
Author(s):  
Marta Vojtíšková ◽  
Věra Jedináková ◽  
Libor Kuča
Keyword(s):  
Nitric Acid ◽  
Nuclear Fuel ◽  
Organic Phase ◽  
Spent Nuclear Fuel ◽  
Optimum Conditions ◽  
Separation Factors ◽  
Nitrate Solutions

Benzyldibutylamine is a suitable extractant for the separation of Am(III) and Ln(III) from the acidic nitrate solutions. The effect of lanthanides and yttrium on the extraction of Am(III) has been followed under the conditions modelling the content of these components in the spent nuclear fuel. The separation factors αAm/Ln were evaluated for the optimum conditions found for the separation of Am(III) from the lanthanides. The coextraction of nitric acid and water into the organic phase is discussed.

Sign in / Sign up

Export Citation Format

Share Document