Radon progeny inhalation study as applicable to uranium mining operations. Fifth annual progress report covering the calendar year 1969

摘要

The main efforts of the past year have been directed towards investigation of the behavior of the radioactive aerosols in actual in mining operations. Activities can be categorized as: Preparation of equipment for taking data in uranium mines; development of background of personnel to carry out intended experiments; research data from United Nuclear Homestake Partners Section 25 mine in the Ambrosia Lake area near Grants, New Mexico; updating of computer programs for data analysis in order to extract more information; and the development of a thermal precipitator for partical size analysis in the submicron range.