Immobilization of high level waste in Synroc
Synroc, a polyphase titanate ceramic, is being developed in Australia as a second generation waste from for the immobilization of high-level waste (HLW) from nuclear plants. The waste form, produced by reactive hot-pressing, has excellent resistance to leaching and there is good evidence that the long-term release rate of elements from Synroc will be of the order of 10/sup /minus/4/ - 10/sup /minus/5/ g/m/sup 2/ per day at 90/degrees/C. The durability of Synroc is not affected significantly by impurities normally present in liquid waste from reprocessing operations and is not sensitive to fluctuations in the composition of waste-stream. Reducing conditions prevalent during Synroc fabrication ensure that the losses of volatiles such as Cs and Ru are restricted to levels of around 0.1% or better. The important physical properties of Synroc are also superior to those of current generation waste forms, allowing greater flexibility of options in managing storage and eventual disposal of high-level waste.
- Research Organization:
- Australian Atomic Energy Commission, Menai
- OSTI ID:
- 6176344
- Report Number(s):
- CONF-870905-
- Journal Information:
- Trans. Am. Nucl. Soc.; (United States), Journal Name: Trans. Am. Nucl. Soc.; (United States) Vol. 56:1; ISSN TANSA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
ALKALI METALS
CESIUM
DISSOLUTION
ELEMENTS
FABRICATION
HIGH-LEVEL RADIOACTIVE WASTES
LEACHING
LIQUID WASTES
MANAGEMENT
MATERIALS
METALS
PERFORMANCE
PHASE TRANSFORMATIONS
PLATINUM METALS
PROCESSING
RADIOACTIVE MATERIALS
RADIOACTIVE WASTE PROCESSING
RADIOACTIVE WASTES
REPROCESSING
ROCKS
RUTHENIUM
SEPARATION PROCESSES
SOLIDIFICATION
SYNTHETIC MATERIALS
SYNTHETIC ROCKS
TRANSITION ELEMENTS
WASTE MANAGEMENT
WASTE PROCESSING
WASTES