Process for treating radioactive waste
N-beta-(Aminoethyl)-gamma-aminopropyltrimethoxysilane (NH2(CH2)2NH(CH2)3SI(OCH3)3) as a silane coupling agent and SiO(2 -x)(ONa)x/2(OH)x/2 as colloidal silica are mixed into a radioactive liquid waste containing sodium sulfate as a main component, coming from a boiling water-type, nuclear power plant as an effluent. The resulting mixed radioactive liquid waste is supplied into a vessel provided with a rotating shaft with blades. The rotating shaft is revolved while heating the radioactive liquid waste in the vessel, thereby making the radioactive liquid waste into powder. The resulting powder containing the silane coupling agent and the colloidal silica is shaped into pellets by a pelletizer. The pellets having a low hygroscopicity and a high strength are obtained.
- Assignee:
- Hitachi Ltd (Japan)
- Patent Number(s):
- US 4361505
- OSTI ID:
- 6615281
- Resource Relation:
- Patent Priority Date: Priority date 2 Feb 1979, Japan; Other Information: PAT-APPL-117089
- Country of Publication:
- United States
- Language:
- English
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Process for treating radioactive wastes
Related Subjects
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
RADIOACTIVE WASTE PROCESSING
LIQUID WASTES
SOLIDIFICATION
BINDERS
BWR TYPE REACTORS
HEATING
PELLETIZING
POWDERS
RADIOACTIVE WASTES
ROTATION
SHAFTS
SILANES
SILICA
CHALCOGENIDES
FABRICATION
HYDRIDES
HYDROGEN COMPOUNDS
MACHINE PARTS
MANAGEMENT
MATERIALS
MINERALS
MOLDING
MOTION
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PROCESSING
RADIOACTIVE MATERIALS
REACTORS
SILICON COMPOUNDS
SILICON OXIDES
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
WATER COOLED REACTORS
WATER MODERATED REACTORS
052001* - Nuclear Fuels- Waste Processing
210100 - Power Reactors
Nonbreeding
Light-Water Moderated
Boiling Water Cooled