Radiological Characterization and Assessment Study of a Coal Slag Used for Abrasive Blasting.
Cox C; Telofski JS; Goode PR
USEPA-NAREL, Montgomery, Alabama, 1995 Jul:52 pages
A bag of coal slag, identified as Sure-Shot was subjected to radiological characterization by gamma and alpha spectrometry analysis. An exposure rate of 30 to 50 microroentgen/hour was measured at about 1 inch from the surface of the 100 pound bag of the slag. Major radionuclides detected by gamma and alpha spectrometry were those in the naturally occurring uranium decay series and potassium-40. Gamma spectrometric analysis indicated a total activity of about 195 picocuries per gram of coal slag which could present a risk for gamma exposure. The radionuclide concentrations found in the coal slag were greater by a factor of about eight than those normally found in soil. Inhalation and external exposure were pathways which presented commercial and residential risks in excess of the Superfund upper limit of 1x10(- 4). The authors recommend that users of coal slag abrasive blasting material survey areas where slag material is present, including a physical survey and radiation measurements for areas and personnel. The users should also provide required training and monitoring for workers that are in areas required to be labeled as restricted areas. All appropriate measures should be taken to minimize occupational radiation exposures and emissions of radioactive abrasive blasting material off site.
NIOSH-Contract; Radioactive-dusts; Radiation-exposure; Radioactive-contaminants; Abrasive-blasting; Abrasives; Risk-analysis;
Final Contract Report;
NTIS Accession No.
USEPA-NAREL, Montgomery, Alabama, 52 pages, 15 references