Technology:
Concrete Shaver
- Marcrist Industries Limited Model DTF25 concrete shaver
- Electric-powered, self-propelled, walk behind concrete and coating removal system
- 10-in. wide diamond impregnated shaving drum with 5-in. blades; vacuum port for dust extraction
- Weighs 330 lbs; requires 380-480 volt, 3-phase power; minimum 16 amps
- Variable cutting depth up to 0.5 in.; can reach to within 3 in. of wall/floor interface or obstruction
- Demonstrated on radioactive-contaminated concrete floor
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Cleanup Authority:
Not identified
Technical Contacts:
Stephen Pulsford
BHI
509-373-1769
Greg Gervais
USACE
206-764-6837 | DOE Contacts:
John Duda
FETC
304-285-4217
Glenn Richardson
DOE-RL
509-376-7121 |
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Contaminants:
Radionuclides
- Beta/gamma radiation |
Waste Source:
Operation of a nuclear research reactor |
Type/Quantity of Media Treated:
Debris (concrete) |
Purpose/Significance of Application:
Demonstration of a concrete shaver to decontaminate radioactive concrete surfaces |
Regulatory Requirements/Cleanup Goals:
The objectives of the demonstration were to evaluate the capability of the shaver in removing contaminated concrete surfaces |
Results:
- Removed concrete from 816 ft2 of floor space in the demonstration area to a depth of 1/8 in. at a rate of 128 ft2/hr
- Contamination levels following demonstration were below free-release levels: |
Cost Factors:
- The costs for the Marcrist Industries Limited Model DTF25 concrete shaver are - $10,700 equipment cost plus $7,161 for a set of replacement blades (100 blades)
- Unit cost of $1.32/ft2, assuming a rate of 128 ft2/hr
- The cost for the shaver is 50% less than the baseline technology (scabbler) |
Description:
The Marcrist Industries Limited Model DTF25 concrete shaver is an electric-powered, self-propelled, walk behind system used to remove concrete and coatings from concrete surfaces. The electric powered shaver is equipped with a diamond impregnated shaving drum and a vacuum port for dust extraction. The shaver was demonstrated on concrete flooring in two rooms at the C reactor that were contaminated with beta/gamma radiation.
During the demonstration, the shaver removed concrete to a depth of 1/8 in from a total area of 816ft2. At the end of the demonstration, radioactivity levels were reported to be below free-release levels. The shaver was compared to the baseline technology - scabbler - and was found to be as much as five times faster, produce less worker fatigue, and save 50% compared to the baseline technology. The shaver requires the use of a HEPA filtration system and is designed to work on floors, but not walls. No specific changes or modifications to the shaver are needed for full-scale deployment. |
