-transparent.png){kind=logo}
The size distribution of radon daughters was measured in several uranium mines using four compact diffusion batteries and a round jet cascade impactor. Simultaneously, measurements were made of uncombined fractions of radon daughters, radon concentration, working level and particle concentration. The size distributions found for radon daughters were log normal. The activity median diameters ranged from 0.09 mum to 0.3 mum with a mean value of 0.17 mum. Geometric standard deviations were in the range from 1.3 to 4 with a mean value of 2.7. Uncombined fractions expressed in accordance with the ICRP definition ranged from 0.004 to 0.16 with a mean value of 0.04. The radon daughter sizes in these mines are greater than the sizes assumed by various authors in calculating respiratory tract dose. The disparity may reflect the widening use of diesel-powered equipment in large uranium mines.
A C George, and
L Hinchliffe, and
R Sladowski
July 1969,
Nature,
A C George, and
L Hinchliffe, and
R Sladowski
November 1980,
Health physics,
A C George, and
L Hinchliffe, and
R Sladowski
April 1982,
Health physics,
A C George, and
L Hinchliffe, and
R Sladowski
December 1956,
American Industrial Hygiene Association quarterly,
A C George, and
L Hinchliffe, and
R Sladowski
July 1969,
Health physics,
A C George, and
L Hinchliffe, and
R Sladowski
December 1964,
Health physics,
A C George, and
L Hinchliffe, and
R Sladowski
August 1964,
Science (New York, N.Y.),
A C George, and
L Hinchliffe, and
R Sladowski
August 1969,
Health physics,
A C George, and
L Hinchliffe, and
R Sladowski
November 1973,
Radiation data and reports,
A C George, and
L Hinchliffe, and
R Sladowski
April 1982,
Health physics,
