Accession Number : AD0431760

Title :   INTERCALIBRATION OF THE MAJOR NORTH AMERICAN NETWORKS EMPLOYED IN MONITORING AIRBORNE FISSION PRODUCTS,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

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

Report Date : 27 DEC 1963

Pagination or Media Count : 17

Abstract : Simultaneous collections of airborne fission products on filters identical to those used by the major air monitoring networks presently operating in North America were made by NRL at Washington, D.C. during June 1963. The filters were returned to each of the cooperating agencies for evaluation of their gross radioactivity content. The results were returned to the U.S. Naval Research Laboratory for tabulation and evaluation. The relative interconversion factors which are derived from the experimentally determined radioactivity concentrations are as follows: U.S. Public Health Service Radiation Surveillance Network, 1.00; Canadian Radiation Protection Division Network, 1.28; U.S. A.E.C. Health and Safety Laboratory 80th Meridian Network, 1.29; Mexican Radiation Protection Program Network, 1.58; and U.S. Public Health Service National Air Sampling Network, 1.77. The variable associated with the volume of air sampled has been eliminated in this study; the above factors relate solely to the evaluation of the combined effect of filter performance and counting techniques employed by the various networks. Recommendations toward improving the reliability of the radioactivity data from air-monitoring networks have been made and a simple procedure suggested for future intercalibrations. (Author)

Descriptors :   (*FISSION PRODUCT ACTIVITY, RADIATION MONITORS), (*RADIATION MONITORS, FISSION PRODUCT ACTIVITY), INSTRUMENTATION, ATMOSPHERES, BETA PARTICLES, COLLECTING METHODS, SAMPLING, RADIATION MEASURING INSTRUMENTS, RADIOACTIVITY

Distribution Statement : APPROVED FOR PUBLIC RELEASE