Development of cementitious grouts for the incorporation of radioactive wastes. Part 2. Continuation of cesium and strontium leach studies. [Hydrofracture]
Additional leach studies were completed on the leachability of cesium and strontium from simulated hydrofracture grout. These studies followed the test method proposed by IAEA or a modification which exposed smaller specimens with a higher surface-to-volume ratio to a larger volume of leachant. Results showed that the amount of cesium or strontium leached from the grout varied directly with the degree of drying during curing and inversely with the time of curing. The leachability also depends on the composition of the leachant and varies in the order: distilled water greater than tap water greater than grout water. The total waste concentration had little effect on the leachability of either cesium or strontium. The credibility of the laboratory results was substantiated by a short-term continuous leach test made on a fragment of a core sample of actual hydrofracture grout. The modified effective diffusivities (10/sup -11/ to 10/sup -10/ cm/sup 2//s) calculated from these limited data were comparable to those obtained from laboratory studies containing Grundite clay. These tests also confirmed the effect of various clays on the leachability of cesium and the importance of leachant renewal frequency on the leach rate.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 7150093
- Report Number(s):
- ORNL-5142; TRN: 76-021775
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CEMENTS
LEACHING
CESIUM
RADIOACTIVE WASTE DISPOSAL
UNDERGROUND DISPOSAL
RADIOACTIVE WASTES
STRONTIUM
CLAYS
DATA
DRYING
TABLES
WATER
ALKALI METALS
ALKALINE EARTH METALS
BUILDING MATERIALS
DISSOLUTION
ELEMENTS
HYDROGEN COMPOUNDS
INFORMATION
MANAGEMENT
MATERIALS
METALS
MINERALS
OXYGEN COMPOUNDS
RADIOACTIVE MATERIALS
SEPARATION PROCESSES
WASTE DISPOSAL
WASTE MANAGEMENT
WASTES
052002* - Nuclear Fuels- Waste Disposal & Storage