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Technology Factsheet

Low-Density Cellular Concrete Void Filling Technology

Category: Dismantlement > Non-Cutting Methods > Void Filling
Reference # : OST No 1846 , DOE/EM - 0458 Model No :

Low-Density Cellular Concrete (LDCC) has a lower density and a lower thermal conductivity than regular concrete. LDCC can be used as an alternative to component segmentation. This void filling process has the potential to reduce significantly the time taken to prepare D&D debris for placement on on-site disposal Facilities (OSDF) and accelerate overall D&D schedules. LDCC is also used for coating vessels and components before dismantlement to suppress release of high levels of surface contamination. Another application would be the use of LDCC for radiation shielding on the outside of contaminated process vessels and components to reduce the levels of radiation outside the components. LDCC is produced by integrating cement with an expanded foam instead of sand/gravel aggregate. Air bubbles entrained in the foam create small air pockets in the concrete and lower its density. Dimensions of Tech Model (LxWxH): Not Available Weight of Tech Model (lb): Not Available

Benefits

Potential to reduce significantly the time taken to prepare the D&D debris for disposal Reduce airborne contamination, worker health and safety risks, and personal protective equipment requirements The compressive strength of the LDCC exceeded 400 psi Can be readily used on cast iron components which some torches are unable to segment Helps contain interior contamination

Limitations

Additional space is required for storing or disposing of intact components No waste volume reduction was noted for the LDCC technology LDCC must be added in layers (4ft. deep maximum) and each layer must be allowed to set and cure (72 hours) The LDCC used in the demonstration had a density of about 45 lbs/ft3, which is denser than the target 25 lbs/ft3. However, the forklift was still able to transport the vessels

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