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Title: Concrete decontamination by electro-hydraulic scabbling (EHS). Final report

Abstract

Contamination of concrete structures by radionuclides, hazardous metals and organic substances (including PCB`s) occurs at many DOE sites. The contamination of concrete structures (walls, floors, ceilings, etc.) varies in type, concentration, and especially depth of penetration into the concrete. In many instances, only the surface layer of concrete is contaminated, up to a depth of one inch, according to estimates provided in the R and D ID document. Then, removal of the concrete surface layer (scabbling) is considered to be the most effective decontamination method. Textron Systems Corp. (TSC) has developed a scabbling concept based on electro-mechanical phenomena accompanying strong electric pulses generated by applying high voltage at the concrete/water interface. Depending on the conditions, the electric discharge may occur either through a waste layer or through the concrete body itself. This report describes the development, testing, and results of this electro-mechanical process. Phase 1 demonstrated the feasibility of the process for the controlled removal of a thin layer of contaminated concrete. Phase 2 designed, fabricated, and tested an integrated subscale unit. This was tested at Fernald. In Phase 3, the scabbling unit was reconfigured to increase its power and processing rate. Technology transfer to an engineering contracting company ismore » continuing.« less

Publication Date:
Research Org.:
Textron Systems, Wilmington, MA (United States)
Sponsoring Org.:
USDOE Assistant Secretary for Fossil Energy, Washington, DC (United States)
OSTI Identifier:
665900
Report Number(s):
DOE/MC/30164-1
ON: DE98058025; BR: EW4035000;EW4035100; TRN: 99:000291
DOE Contract Number:  
AC21-93MC30164
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: Oct 1997
Country of Publication:
United States
Language:
English
Subject:
05 NUCLEAR FUELS; PROGRESS REPORT; CONCRETES; SURFACE CONTAMINATION; PULSE TECHNIQUES; ELECTROLYSIS; SURFACE CLEANING; DECONTAMINATION; SPECIFICATIONS; MATERIALS HANDLING EQUIPMENT; EXPERIMENTAL DATA

Citation Formats

NONE. Concrete decontamination by electro-hydraulic scabbling (EHS). Final report. United States: N. p., 1997. Web. doi:10.2172/665900.
NONE. Concrete decontamination by electro-hydraulic scabbling (EHS). Final report. United States. doi:10.2172/665900.
NONE. Wed . "Concrete decontamination by electro-hydraulic scabbling (EHS). Final report". United States. doi:10.2172/665900. https://www.osti.gov/servlets/purl/665900.
@article{osti_665900,
title = {Concrete decontamination by electro-hydraulic scabbling (EHS). Final report},
author = {NONE},
abstractNote = {Contamination of concrete structures by radionuclides, hazardous metals and organic substances (including PCB`s) occurs at many DOE sites. The contamination of concrete structures (walls, floors, ceilings, etc.) varies in type, concentration, and especially depth of penetration into the concrete. In many instances, only the surface layer of concrete is contaminated, up to a depth of one inch, according to estimates provided in the R and D ID document. Then, removal of the concrete surface layer (scabbling) is considered to be the most effective decontamination method. Textron Systems Corp. (TSC) has developed a scabbling concept based on electro-mechanical phenomena accompanying strong electric pulses generated by applying high voltage at the concrete/water interface. Depending on the conditions, the electric discharge may occur either through a waste layer or through the concrete body itself. This report describes the development, testing, and results of this electro-mechanical process. Phase 1 demonstrated the feasibility of the process for the controlled removal of a thin layer of contaminated concrete. Phase 2 designed, fabricated, and tested an integrated subscale unit. This was tested at Fernald. In Phase 3, the scabbling unit was reconfigured to increase its power and processing rate. Technology transfer to an engineering contracting company is continuing.},
doi = {10.2172/665900},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Oct 01 00:00:00 EDT 1997},
month = {Wed Oct 01 00:00:00 EDT 1997}
}

Technical Report:

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