Processing of irradiated, enriched uranium fuels at the Savannah River Plant

Hyder, M L; Perkins, W C; Thompson, M.C.; Burney, G A; Russell, E R; Holcomb, H P; Landon, L F

doi:10.2172/5819865

Cited by 23 publications

(46 citation statements)

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“…The solubility of boric acid (H 3 BO 3 ) in 10 M HNO 3 (at 25 C) is approximately 2.75 g/L; therefore, exceeding the H 3 BO 3 solubility limit is not an issue. [12] Higher KF concentrations can be considered for the dissolution, although corrosion control issues and the precipitation of B as KBF 4 must also be taken into account. The precipitation of B as KBF 4 [5] The study also showed that dissolution rate decreased with increasing temperature in 0.13 M HF but increased with increasing temperature at 0.01 M and 0.07 M HF.…”

Section: Dissolution Rate Measurementsmentioning

confidence: 99%

Dissolution of Plutonium Metal in 8-10 M Nitric Acid

Rudisill¹,

Pierce²

2012

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Section: Dissolution Rate Measurementsmentioning

confidence: 99%

Dissolution of Plutonium Metal in 8-10 M Nitric Acid

Rudisill¹,

Pierce²

2012

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“…The Actinide Technology Section has proposed the use of an nitric acid (HNO 3 ) and potassium fluoride (KF) flowsheet for stripping palladium (Pd) from palladium-coated kieselguhr (Pd/K) and removing aluminum (Al) metal foam from the TCAP coils. The basis for the HNO 3 -KF flowsheet is drawn from many sources.…”

Section: Overviewmentioning

confidence: 99%

“…In the first step, Pd metal is stripped from the Pd/K substrate in the coils using 8M HNO 3 . The acid is continually circulated through the coil at or near ambient temperature.…”

Section: Overviewmentioning

confidence: 99%

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TCAP Aluminium Dissolution Flowsheet Basis

Pierce¹

2004

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“…However, the small amounts of Np, Am, and Cm (minor actinides) produced during fuel irradiation are not recovered and are currently discarded with the fission products as high level waste. If desired, Np produced in used reactor fuels can be recovered by making slight modifications to the PUREX process to control the Np valence and extraction into the solvent [4,5] as was performed at the US DOE's Savannah River Site for the production of 238 Pu for heat source applications [6].…”

Section: Introductionmentioning

confidence: 99%

Distribution of lanthanide and actinide elements between bis-(2-ethylhexyl)phosphoric acid and buffered lactate solutions containing selected complexants

Rudisill

DiPrete

Thompson

2012

J Radioanal Nucl Chem

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With the renewed interest in the closure of the nuclear fuel cycle, the TALSPEAK process is being considered for the separation of Am and Cm from the lanthanide fission products in a next generation reprocessing plant. However, an efficient separation requires tight control of the pH which likely will be difficult to achieve on a large scale. To address this issue, we measured the distribution of lanthanide and actinide elements between aqueous and organic phases in the presence of complexants which were potentially less sensitive to pH control than the diethylenetriaminepentaacetic (DTPA) used in the process. To perform the extractions, a rapid and accurate method was developed for measuring distribution coefficients based on the preparation of lanthanide tracers in the Savannah River National Laboratory neutron activation analysis facility. The complexants tested included aceto-, benzo-, and salicylhydroxamic acids, N,N,N,N-tetrakis(2-pyridylmethyl)ethylenediamine (TPEN), and ammonium thiocyanate (NH 4 SCN). The hydroxamic acids were the least effective of the complexants tested. The separation factors for TPEN and NH 4 SCN were higher, especially for the heaviest lanthanides in the series; however, no conditions were identified which resulted in separations factors which consistently approached those measured for the use of DTPA.

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Processing of irradiated, enriched uranium fuels at the Savannah River Plant

Cited by 23 publications

References 0 publications

Dissolution of Plutonium Metal in 8-10 M Nitric Acid

Dissolution of Plutonium Metal in 8-10 M Nitric Acid

TCAP Aluminium Dissolution Flowsheet Basis

Distribution of lanthanide and actinide elements between bis-(2-ethylhexyl)phosphoric acid and buffered lactate solutions containing selected complexants

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