Incinerator ash dissolution model for the system: Plutonium, nitric acid and hydrofluoric acid
Abstract
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%. Themore »
- Authors:
- Publication Date:
- Research Org.:
- Savannah River Lab., Aiken, SC (USA)
- OSTI Identifier:
- 5209305
- Report Number(s):
- DP-MS-88-57
ON: DE88008830
- Resource Type:
- Technical Report
- Resource Relation:
- Other Information: Thesis (M.S.)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; ASHES; DISSOLUTION; COMPUTER CODES; DISSOLVERS; PLUTONIUM; RECOVERY; PLUTONIUM DIOXIDE; COMPUTERIZED SIMULATION; DYSPROSIUM OXIDES; EQUATIONS; FLUORIDES; INCINERATORS; MASS TRANSFER; ACTINIDE COMPOUNDS; ACTINIDES; CHALCOGENIDES; DYSPROSIUM COMPOUNDS; ELEMENTS; FLUORINE COMPOUNDS; HALIDES; HALOGEN COMPOUNDS; METALS; OXIDES; OXYGEN COMPOUNDS; PLUTONIUM COMPOUNDS; PLUTONIUM OXIDES; RARE EARTH COMPOUNDS; RESIDUES; SIMULATION; TRANSURANIUM COMPOUNDS; TRANSURANIUM ELEMENTS; 052001* - Nuclear Fuels- Waste Processing
Citation Formats
Brown, E V. Incinerator ash dissolution model for the system: Plutonium, nitric acid and hydrofluoric acid. United States: N. p., 1988.
Web. doi:10.2172/5209305.
Brown, E V. Incinerator ash dissolution model for the system: Plutonium, nitric acid and hydrofluoric acid. United States. doi:10.2172/5209305.
Brown, E V. Wed .
"Incinerator ash dissolution model for the system: Plutonium, nitric acid and hydrofluoric acid". United States.
doi:10.2172/5209305. https://www.osti.gov/servlets/purl/5209305.
@article{osti_5209305,
title = {Incinerator ash dissolution model for the system: Plutonium, nitric acid and hydrofluoric acid},
author = {Brown, E V},
abstractNote = {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.},
doi = {10.2172/5209305},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Jun 01 00:00:00 EDT 1988},
month = {Wed Jun 01 00:00:00 EDT 1988}
}