An incinerator ash dissolution model for the system: plutonium oxide, nitric and hydrofluoric acids

Journal Article · Thu Mar 01 04:00:00 EST 1990 · Nuclear Technology; (USA)

OSTI ID:6826626

Brown, E V; Tedder, D W ^[1]; Gray, L W ^[2]

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1. Georgia Inst. of Tech., Atlanta, GA (USA). School of Chemical Engineering
2. Du Pont de Nemours (E.I.) and Co., Aiken, SC (USA). Savannah River Lab.

A computer model of an air-lift dissolver was developed to predict the dissolution rates for plutonium oxide (PuO{sub 2}), dysprosium oxide (Dy{sub 2}O{sub 3}), and incinerator ash. This model combines surface kinetics with mass transfer effects to obtain overall rate expressions. The mass transfer coefficients are related to several major process variables. These predictions were compared with experimental tests at Savannah River Laboratory using simulated ash and Dy{sub 2}O{sub 3} as a surrogate for refractory PuO{sub 2}. The present version of the model over estimates the residual fluoride concentrations in dissolver effluents by {approx}50% for several reasons, which are discussed. The minimum air sparge rates to achieve liquid circulation in the dissolver are predicted quite well, within {plus minus}6%. The nonvolatile dissolved solids are estimated to within {plus minus}5 to 20%.

• DOE Contract Number: AC09-76SR00001
• OSTI ID: 6826626
• Journal Information: Nuclear Technology; (USA), Journal Name: Nuclear Technology; (USA) Vol. 89:3; ISSN NUTYB; ISSN 0029-5450
• Country of Publication: United States
• Language: English

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11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400202 -- Isotope Effects
Isotope Exchange
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99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
ACTINIDE COMPOUNDS
CHALCOGENIDES
COMPUTERIZED SIMULATION
DISSOLUTION
DYSPROSIUM COMPOUNDS
DYSPROSIUM OXIDES
HYDROFLUORIC ACID
HYDROGEN COMPOUNDS
INORGANIC ACIDS
MASS TRANSFER
NATIONAL ORGANIZATIONS
NITRIC ACID
OXIDES
OXYGEN COMPOUNDS
PLUTONIUM COMPOUNDS
PLUTONIUM OXIDES
RARE EARTH COMPOUNDS
SAVANNAH RIVER PLANT
SIMULATION
TRANSURANIUM COMPOUNDS
US AEC
US DOE
US ERDA
US ORGANIZATIONS