Some content of this application is unavailable at the moment.
If this situation persists, please contact us atFeedback&Contact
1. (WO1998053463) METHOD FOR ACID OXIDATION OF RADIOACTIVE, HAZARDOUS, AND MIXED ORGANIC WASTE MATERIALS
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1998/053463 International Application No.: PCT/US1998/009823
Publication Date: 26.11.1998 International Filing Date: 14.05.1998
Chapter 2 Demand Filed: 11.12.1998
IPC:
A62D 3/00 (2007.01) ,G21F 9/06 (2006.01) ,G21F 9/30 (2006.01)
A HUMAN NECESSITIES
62
LIFE-SAVING; FIRE-FIGHTING
D
CHEMICAL MEANS FOR EXTINGUISHING FIRES; PROCESSES FOR MAKING HARMFUL CHEMICAL SUBSTANCES HARMLESS, OR LESS HARMFUL, BY EFFECTING A CHEMICAL CHANGE; COMPOSITION OF MATERIALS FOR COVERINGS OR CLOTHING FOR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; COMPOSITION OF MATERIALS FOR TRANSPARENT PARTS OF GAS-MASKS, RESPIRATORS, BREATHING BAGS OR HELMETS; COMPOSITION OF CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
3
Processes for making harmful chemical substances harmless, or less harmful, by effecting a chemical change in the substances
G PHYSICS
21
NUCLEAR PHYSICS; NUCLEAR ENGINEERING
F
PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
9
Treating radioactively contaminated material; Decontamination arrangements therefor
04
Treating liquids
06
Processing
G PHYSICS
21
NUCLEAR PHYSICS; NUCLEAR ENGINEERING
F
PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
9
Treating radioactively contaminated material; Decontamination arrangements therefor
28
Treating solids
30
Processing
Applicants:
WESTINGHOUSE SAVANNAH RIVER COMPANY [US/US]; P.O. Box 616 Aiken, SC 29808, US
Inventors:
PIERCE, Robert, A.; US
SMITH, James, R.; US
BICKFORD, Dennis, F.; US
RAMSEY, William, G.; US
CICERO-HERMAN, Connie, A.; US
Agent:
PRATT, John, S. ; Kilpatrick Stockton LLP Suite 2800 1100 Peachtree Street Atlanta, GA 30309-4530, US
Priority Data:
08/861,48322.05.1997US
Title (EN) METHOD FOR ACID OXIDATION OF RADIOACTIVE, HAZARDOUS, AND MIXED ORGANIC WASTE MATERIALS
(FR) PROCEDE D'OXYDATION ACIDE DE DECHETS ORGANIQUES RADIOACTIFS, DANGEREUX ET MIXTES
Abstract:
(EN) The present invention is directed to a process for reducing the volume of low level radioactive and mixed waste to enable the waste to be more economically stored in a suitable repository, and for placing the waste into a form suitable for permanent disposal. The invention involves a process for preparing radioactive, hazardous, or mixed waste for storage by contacting the waste starting material containing at least one organic carbon-containing compound and at least one radioactive or hazardous waste component with nitric acid and phosphoric acid simultaenously at a contacting temperature in the range of about 140 °C to about 210 °C for a period of time sufficient to oxidize at least a portion of the organic carbon-containing compound to gaseous products, thereby producing a residual concentrated waste product containing substantially all of said radioactive or inorganic hazardous waste component; and immobilizing the residual concentrated waste product in a solid phosphate-based ceramic or glass form.
(FR) La présente invention concerne un procédé de réduction du volume de déchets à faible niveau de radioactivité et de déchets mixtes pour permettre un stockage plus économique de ces déchets dans un dépôt approprié, et pour les rendre plus aptes à une évacuation permanente. L'invention décrit un procédé de préparation de stockage de déchets radioactifs, dangereux ou mixtes par mise en contact des déchets de départ contenant au moins un composé contenant du carbone organique et au moins un composant de déchet radioactif ou dangereux, avec de l'acide nitrique et de l'acide phosphorique simultanément, à une température de contact comprise entre 140 °C et 210 °C environ et pendant une période suffisante pour oxyder au moins une partie du composé contenant du carbone organique en produits gazeux, ce qui permet de produire des déchets résiduels concentrés contenant sensiblement tous les composants de déchets radioactifs ou inorganiques dangereux; les déchets résiduels concentrés sont ensuite immobilisés dans une forme solide en verre ou en céramique à base de phosphate.
Designated States: CA, CN, JP, RU
European Patent Office (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
Publication Language: English (EN)
Filing Language: English (EN)