Concrete Shaver at the Hanford Site, Richland, Washington

Site Name:

Hanford Site


Richland, WA

Period of

November 1997


Field demonstration


Ian Bannister
Marcrist Industries Limited
+44 (0) 1302 890888

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

Cleanup Authority:
Not identified

Technical Contacts:
Stephen Pulsford

Greg Gervais
DOE Contacts:
John Duda

Glenn Richardson

- 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

- 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)

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.