Aerosol Dispersion Measurements in Enclosed Atmospheres
Aerosol transport in confined spaces is of interest to many nuclear facilities, DOE and NRC licensees. In particular, consequence assessment, environmental monitoring and cleanup activities, and radiation worker protection benefit if detailed knowledge on aerosol behavior is available. The transport and fate of particulates in closed systems are governed by not only the airflow in the building but by many characteristics of the aerosol, and their interactions with the surroundings. This includes coagulation, thermophoresis, and surface deposition as the most important processes. Planned layout of air monitors and risk assessment of individuals relies on predictive models of indoor aerosol dispersion. Current models available in the public domain do not address many of the important governing phenomena of aerosol behavior in sufficient rigor. With the lack of adequate models, site-specific features of aerosol dispersion may be obtained via direct measurements. Two series of experiments were performed in the Louisiana State University Nuclear Science Center to measure the characteristics of spatial and temporal transport of aerosol concentration, deposition, and particle size distribution following a simulated accidental release.
This abstract was presented at the 33rd Annual Midyear Meeting, "Instrumentation, Measurements, and Electronic Dosimetry", Laboratory Use Session, 1/30/2000 - 2/2/2000, held in Virginia Beach, VA.