Incinerator ash dissolution model for the system: Plutonium, nitric acid and hydrofluoric acid

Technical Report · Wed Jun 01 04:00:00 EDT 1988

DOI:https://doi.org/10.2172/5209305· OSTI ID:5209305

Brown, E V

This research accomplished two goals. The first was to develop a computer program to simulate a cascade dissolver system. This program would be used to predict the bulk rate of dissolution in incinerator ash. The other goal was to verify the model in a single-stage dissolver system using Dy/sub 2/O/sub 3/. PuO/sub 2/ (and all of the species in the incinerator ash) was assumed to exist as spherical particles. A model was used to calculate the bulk rate of plutonium oxide dissolution using fluoride as a catalyst. Once the bulk rate of PuO/sub 2/ dissolution and the dissolution rate of all soluble species were calculated, mass and energy balances were written. A computer program simulating the cascade dissolver system was then developed. Tests were conducted on a single-stage dissolver. A simulated incinerator ash mixture was made and added to the dissolver. CaF/sub 2/ was added to the mixture as a catalyst. A 9M HNO/sub 3/ solution was pumped into the dissolver system. Samples of the dissolver effluent were analyzed for dissolved and F concentrations. The computer program proved satisfactory in predicting the F concentrations in the dissolver effluent. The experimental sparge air flow rate was predicted to within 5.5%. The experimental percentage of solids dissolved (51.34%) compared favorably to the percentage of incinerator ash dissolved (47%) in previous work. No general conclusions on model verification could be reached. 56 refs., 11 figs., 24 tabs.

• Research Organization: Savannah River Lab., Aiken, SC (USA)
• OSTI ID: 5209305
• Report Number(s): DP-MS-88-57; ON: DE88008830
• Country of Publication: United States
• Language: English

Related Subjects

052001* -- Nuclear Fuels-- Waste Processing
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
ACTINIDE COMPOUNDS
ACTINIDES
ASHES
CHALCOGENIDES
COMPUTER CODES
COMPUTERIZED SIMULATION
DISSOLUTION
DISSOLVERS
DYSPROSIUM COMPOUNDS
DYSPROSIUM OXIDES
ELEMENTS
EQUATIONS
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
INCINERATORS
MASS TRANSFER
METALS
OXIDES
OXYGEN COMPOUNDS
PLUTONIUM
PLUTONIUM COMPOUNDS
PLUTONIUM DIOXIDE
PLUTONIUM OXIDES
RARE EARTH COMPOUNDS
RECOVERY
RESIDUES
SIMULATION
TRANSURANIUM COMPOUNDS
TRANSURANIUM ELEMENTS