Evaluation of indoor aerosol control devices and their effects on radon progeny concentrations. Revision
Eleven portable air cleaning devices have been evaluated for control of indoor concentrations of respirable particles, and their concomitant effects on radon progeny concentrations have been investigated. The experiments were conducted in a room-size chamber using cigarette smoke and radon injection from an external source. Of the devices examined the electrostatic precipitators and extended surface filters had significant particle removal rates, while the particle removal rates for several small panel-filters, an ion-generator, and a pair of mixing fans were found to be essentially negligible. The evaluation of radon progeny control produced similar results; the air cleaners which were effective in removing particles were also effective in reducing radon progeny concentrations. At the low particle concentrations, deposition of the unattached radon progeny on room surfaces was found to be a significant removal mechanism. Deposition rates of attached and unattached progeny have been estimated from these data, and were used to calculate the equilibrium factors for total and unattached progeny concentrations as a function of particle concentration. While particle removal reduces total airborne radon progeny concentrations, the relative alpha decay dose to the lungs appears to change very little as the particle concentration decreases due to the greater radiological importance of unattached progeny.
- Research Organization:
- Lawrence Berkeley Lab., CA (USA)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 5878987
- Report Number(s):
- LBL-17598-Rev.; EEB-Vent-84-13; CONF-840803-8-Rev.; ON: DE86009367
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
560161 -- Radionuclide Effects
Kinetics
& Toxicology-- Man
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
AEROSOLS
AIR POLLUTION
BODY
COLLOIDS
DISPERSIONS
DOSES
ECOLOGICAL CONCENTRATION
ELEMENTS
FLUIDS
GASES
INDOOR AIR POLLUTION
INHALATION
INTAKE
LUNGS
NONMETALS
ORGANS
PARTICLES
PARTICULATES
POLLUTION
RADIATION DOSES
RADIOECOLOGICAL CONCENTRATION
RADIONUCLIDE KINETICS
RADON
RARE GASES
RESIDUES
RESPIRATORY SYSTEM
SMOKES
SOLS
TOBACCO SMOKES