Division of Waste Management, Production, and Reprocessing programs progress report for January--December 1976
- comp.
Development of the acid digestion process for treating combustible nuclear wastes has progressed to design and construction of the Radioactive Acid Digestion Test Unit (RADTU). Tests were continued in the nonradioactive Acid Digestion Test Unit (ADTU) in an effort to improve the performance of the system. Nitric acid consumption has been decreased from 8.8 to 4.5 kg HNO/sub 3//kg digested waste by adding the nitric acid deep below the liquid surface in the annular heating vessel instead of at the surface of the tray digester. A highly successful 70-hr continuous processing run was completed in the ADTU to confirm the operating experience in shorter runs and to test the use of air (instead of nitrogen) in the airlift pump. Initial studies were completed on fixation of acid digestion residue following recovery and drying. A variety of solidification and testing equipment was assembled to prepare and test immobilized waste products. Studies were continued on immobilization of salts and wet wastes. Salt residue-cement systems characterized include calcium sulfate, ferric sulfate, sodium sulfate, sodium nitrate, calcium chloride, and sodium chloride. Anion and cation exchange resin immobilization in cement has also been studied, as well as immobilization of sodium silicate in cement. A new program on Intermediate Level Liquid Waste (ILLW) Solidification was started with the purpose of developing and demonstrating immobilization technologies for liquid and particulate solid ILW within the fuel cycle. The four primary fuel cycle operations (reactors, spent fuel storage basins, fuel reprocessing plants, and MOX fuel fabrication plants) were reviewed and a list of sources and quantities of waste was formulated. The annual accumulation of radioactive waste materials at the six commercial waste burial sites was updated through 1976. The total accumulated volume at the end of 1976 was about 434,000 m/sup 3/. (LK)
- Research Organization:
- Hanford Engineering Development Lab., Richland, WA (United States)
- DOE Contract Number:
- EY-76-C-14-2170
- OSTI ID:
- 7293414
- Report Number(s):
- HEDL-TME-77-40; TRN: 78-000035
- Country of Publication:
- United States
- Language:
- English
Similar Records
Division of waste management programs. Progress report, July--December 1977. [Intermediate level waste solidification; acid digestion]
Division of Waste Management Programs progress report, January--June 1978. [ILW solidification; chemical processing of combustible solid waste (RADTU); acid digestion of commercial solid waste]
Related Subjects
RADIOACTIVE WASTE PROCESSING
DIGESTION
LIQUID WASTES
RESEARCH PROGRAMS
SOLID WASTES
SOLIDIFICATION
BITUMENS
CALCIUM CHLORIDES
CALCIUM SULFATES
CEMENTS
ION EXCHANGE MATERIALS
IRON SULFATES
NITRIC ACID
RESINS
SALTS
SODIUM CHLORIDES
SODIUM NITRATES
SODIUM SULFATES
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
BUILDING MATERIALS
CALCIUM COMPOUNDS
CALCIUM HALIDES
CHLORIDES
CHLORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
IRON COMPOUNDS
MANAGEMENT
MATERIALS
NITRATES
NITROGEN COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OTHER ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PETROCHEMICALS
PETROLEUM PRODUCTS
PHASE TRANSFORMATIONS
POLYMERS
PROCESSING
SODIUM COMPOUNDS
SULFATES
SULFUR COMPOUNDS
TAR
TRANSITION ELEMENT COMPOUNDS
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
052001* - Nuclear Fuels- Waste Processing