Process and apparatus for treating radioactive waste
This patent describes a process for treating radioactive waste. This process consists of: 1.) providing radioactive waste comprising at least one of radioactive liquid waste and radioactive waste slurry each of solid matter and water; 2.) conducting the radioactive waste to a first waste feed tank; 3.) Evaporating a portion of the water in an evaporator; 4.) withdrawing the evaporated water; 5.) conducting the waste from the evaporator to a second waste feed tank; 6.) conducting the waste from the second waste feed tank to the upper part of a centrifugal film dryer. The vaporized water is withdrawn and condensed. The remaining solid matter forms a dry film on the wall and rotating blades scrap the dry solid matter from the wall to form a dry powder which accumulates at the lower part of the dryer. 7.) withdrawing the accumulated powder; 8.) forming the withdrawn powder into pellets in a pelletizer, 9.) withdrawing the pellets to storage; washing the interior of the centrifugal film dryer and the pelletizer with hot water to remove the deposited powder, and conducting this water to a storage tank. 10.) conducting the material from the storage tank to the first waste feed tank to be treated as radioactive waste.
- Assignee:
- Hitachi, Ltd., Tokyo
- Patent Number(s):
- US 4569787
- OSTI ID:
- 6129022
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
CLEANING
DISPERSIONS
DRYERS
EVAPORATION
EVAPORATORS
FILMS
HIGH-LEVEL RADIOACTIVE WASTES
HOT WATER
HYDROGEN COMPOUNDS
LIQUID WASTES
MANAGEMENT
MATERIALS
MIXTURES
OXYGEN COMPOUNDS
PELLETS
PHASE TRANSFORMATIONS
POWDERS
PROCESSING
RADIOACTIVE MATERIALS
RADIOACTIVE WASTE PROCESSING
RADIOACTIVE WASTE STORAGE
RADIOACTIVE WASTES
SLURRIES
SOLIDIFICATION
STORAGE
STORAGE FACILITIES
SUSPENSIONS
WASHING
WASTE MANAGEMENT
WASTE PELLETS
WASTE PROCESSING
WASTE STORAGE
WASTES
WATER