Accession Number : AD0421841

Title :   FILTER PACK TECHNIQUE FOR CLASSIFYING RADIOACTIVE AEROSOLS BY PARTICLE SIZE. PART 1 PRELIMINARY EVALUATION.

Descriptive Note : Interim rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : Lockhart,L. B. ,Jr. ; Patterson,R. L. ,Jr.

Report Date : 16 AUG 1963

Pagination or Media Count : 10

Abstract : Study of the efficiency of filters for the retention of natural airborne radioactive aerosols has shown that the paricles with which the radioactivity of the short-lived radon daughters is associated have greater ability to penetrate the variousfilter media than has the fission product debris in the atmosphere; therefore the former is associated with aerosols of smaller size. A preliminary evaluation of the techniques of employing packs of filters of different retentivity characteristics to determine the particle size and/or particle size distribution of radioactive aerosols has been made which indicates the feasibility of the method. It is recommended that a series of measurements be undertaken to determine the relative particle size distribution of RaB+C as a function of time, season and weather, and the size ditribution of fission products as a function of the above parameters and the source of the debris. (Author)

Descriptors :   (*GAS FILTERS, RADIOACTIVITY), AEROSOLS, PARTICLES, FISSION PRODUCTS, RADIOACTIVE ISOTOPES, NATURAL RADIOACTIVITY, RADON

Distribution Statement : APPROVED FOR PUBLIC RELEASE