Crud formation by palladium particles as insoluble residues

Journal Article · Fri May 01 00:00:00 EDT 1992 · Nuclear Technology; (United States)

OSTI ID:5218336

Munakata, K; Sugai, H ^[1]; Miyachi, S; Yasu, S ^[2]

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1. Sumitomo Metal Mining Co., Ltd., Tokai Research Center, 2600, Ishigamitojuku, Takai-Mura, Ibaraki-ken 319-11 (JP)
2. Power Reactor and Nuclear Fuel Development Corp., Tokai Works Reprocessing Plant, Analysis Section 4-33, Muramatu, Tokai-mura, Ibaraki-ken 319-11 (JP)

This paper reports on crud which is a problem in the solvent extraction process for nuclear fuel reprocessing. Crud is an emulsion stabilized by dispersed fine solids. Insoluble residues and precipitates play an important role in crud formation. The effect of insoluble residues on crud formation is studied using submicron particles of palladium, which is one of the elements contained in insoluble residues. Experiments are conducted on factors such as palladium concentration, particle size, and acidity. The experimental results indicate that the smallest palladium concentration in the aqueous phase that can stabilize an emulsion is {approximately}g/l and that such an emulsion is of the oil-in-water type. Moreover, the palladium layer on globules is discussed, and a numerical estimation is performed to predict the time when stable emulsions start to form in a mixer-settler.

• OSTI ID: 5218336
• Journal Information: Nuclear Technology; (United States), Journal Name: Nuclear Technology; (United States) Vol. 98:2; ISSN NUTYB; ISSN 0029-5450
• Country of Publication: United States
• Language: English

Related Subjects

050800* -- Nuclear Fuels-- Spent Fuels Reprocessing
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
AQUEOUS SOLUTIONS
COLLOIDS
CONCENTRATION RATIO
DATA
DISPERSIONS
ELEMENTS
EMULSIONS
ENERGY SOURCES
EXTRACTION
FUELS
INFORMATION
LAYERS
MATERIALS
METALS
MIXTURES
NUCLEAR FUELS
NUMERICAL DATA
PALLADIUM
PARTICLE SIZE
PARTICLES
PLATINUM METALS
PRECIPITATION
REACTOR MATERIALS
REPROCESSING
SEPARATION PROCESSES
SIZE
SOLUBILITY
SOLUTIONS
SOLVENT EXTRACTION
STABILIZATION
TRANSITION ELEMENTS