Author: United States. Bureau of Mines
Publisher:
ISBN:
Category : Aerosols
Languages : en
Pages : 15

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Author: Los Alamos Scientific Laboratory
Publisher:
ISBN:
Category : Aerosols
Languages : en
Pages :

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Author: R. C. Scripsick
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Book Description
A draft Manual of Recommended Practice for Aerosol Sampling and Evaluation was completed and sent to the Energy Research and Development Administration (ERDA) Division of Safety, Standards, and Compliance (DSSC) for review. The results of the Survey of Sampling Techniques for Defining Respirable Concentration and/or Particle Size Characteristics of Aerosols were published as LA-6087. The need for greater standardization of ERDA aerosol sampling techniques was indicated. The Aerosol Training Course was presented in 11 sessions to 85 persons. General elements of good practice were emphasized, and recommendation of specific sampling devices or procedures was avoided. A system for estimating dissolution rates of plutonium aerosols was developed. Studies indicate that plutonium aerosols found in the field have a rapid initial dissolution phase followed by a slower secondary phase. Three methods of particle sizing air samples collected on membrane filters were investigated. The most promising was a scanning electron microscope electron microprobe (SEM-EMp) method. An operating plutonium handling facility was a model for development of techniques to evaluate aerosol surveillance systems performance. Airborne contamination records were studied. The physicochemical properties of a plutonium aerosol existing in the facility were investigated in relation to plutonium handling operations. The techniques developed have indicated some areas of the aerosol surveillance system that need improvement.

Author: Ronald C. Scripsick
Publisher:
ISBN:
Category :
Languages : en
Pages : 12

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Measurements of the dilution of air contaminants between worker breathing zone and area air samplers were made by releasing a test fluorescent aerosol in workrooms equipped with aerosol surveillance systems. These data were used to evaluate performance and suggest improvements in design of alarming air monitor systems. In one workroom studied, average half-hour breathing zone air concentration needed to trigger alarm was found to be 960 times the maximum permissible air concentration for occupational exposure to soluble 239Pu (MPC/sub a/). It was shown that alternative monitor placement in this room could result in decreasing average triggering concentration to 354 times the MPC/sub a/. Analysis of data from impaction-autoradiographic sizing comparison studies showed average disintegration to track ratio called track efficiency factor, to be 2.7 +- 0.4

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Book Description
Measurements of the dilution of air contaminants between worker breathing zone and area air samplers were made by releasing a test fluorescent aerosol in workrooms equipped with aerosol surveillance systems. These data were used to evaluate performance and suggest improvements in design of alarming air monitor systems. In one workroom studied, average half-hour breathing zone air concentration needed to trigger alarm was found to be 960 times the maximum permissible air concentration for occupational exposure to soluble 239Pu (MPC/sub a/). It was shown that alternative monitor placement in this room could result in decreasing average triggering concentration to 354 times the MPC/sub a/. Analysis of data from impaction-autoradiographic sizing comparison studies showed average disintegration to track ratio called track efficiency factor, to be 2.7 +- 0.4.

Author: Harry J. Ettinger
Publisher:
ISBN:
Category : Aerosols
Languages : en
Pages : 34

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Book Description

Author: Thomas Mercer
Publisher: Elsevier
ISBN: 0323141293
Category : Technology & Engineering
Languages : en
Pages : 407

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Book Description
Aerosol Technology in Hazard Evaluation is the fifth in the series of books on the subject of aerosol technology. This series is organized into nine chapters that cover the properties, sampling, and respirable activity of aerosol. After briefly describing the nature of an inhalation hazard, the book examines the properties, measurement, and significance of geometric diameters of aerosols, as well as the shape factors relating them to various particulate properties. The mathematical description of size distributions and the statistics of sampling from a lognormal distribution of particle sizes are provided. Considerable chapters deal with the methods of aerosol concentration measurement and geometric and aerodynamic size sampling. Operating characteristics of respirable aerosol activity samplers and their limitations are also examined. The concluding chapter discusses problems in the production, flow measurement, apparatus calibration, and isokinetic sampling of aerosols. This series will provide a convenient source of information to those concerned in industrial hygiene and will stimulate the interest of those involved in all phases of environmental health.

Author: Lawrence W. Ortiz
Publisher:
ISBN:
Category : Aerosols
Languages : en
Pages : 18

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Author: Benjamin Y.H. Liu
Publisher: Elsevier
ISBN: 0323142214
Category : Technology & Engineering
Languages : en
Pages : 852

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Book Description
Fine Particles: Aerosol Generation, Measurement, Sampling, and Analysis is a collection of technical papers presented at the Symposium on Fine Particles held in Minneapolis, Minnesota, on May 28-30, 1975. The symposium aims to explore the developments in instrumentation and experimental techniques for aerosol studies. This book is organized into four parts encompassing 34 chapters that focus on fine particles below about 3.5 μm in diameter. Part I presents the research and development in Europe and Japan on fine particles and aerosols, as well as the aerosol standards development work at the Particle Technology Laboratory, University of Minnesota. This part also includes calibration studies on condensation nuclei counters and the diffusion battery. Significant chapters in Part II are devoted to the common techniques for generation of aerosols of various sizes, from fine particles to monodisperse aerosols. This part further looks into the equipment limitations and problems in producing fine particle aerosols for life testing air cleaning systems and for weather modification experimentation. Part III describes the techniques and equipment used for size-selective aerosol sampling in terms of the design principles applied, the correspondence between design and performance of specific samplers, their applicability to field conditions, and their ability to satisfy sampler acceptance criteria. Part IV deals first with the methods for determination of aerosol properties, including their optical, electrical, and spectral properties. Other chapters examine the principles, mode of operation, and application of processes and instruments for aerosol studies.