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Document ID (ISN)23895
CIS number 75-1610
Year 1974
Convention or series no.
Author(s) Rodgers J.C.
Title Radon progeny exposure measurement using lead-210.
Bibliographic information HEW Publication No.(NIOSH)75-116, National Institute for Occupational Safety and Health, Post Office Building, Cincinnati, Ohio 45202, USA, Oct. 1974. 66p. Illus. 18 ref.
Abstract This technical information report describes investigations leading to a technique for monitoring the average alpha-exposure due to airborne decay products of radon-222 in a uranium mine atmosphere, laying stress on theoretical considerations. The basis of the method is to collect a long-term, high-volume sample, let the short-lived radon daughters decay to lead-210, and count the lead-210 using liquid scintillation techniques. Only a fraction of the lead-210 activity counted was attributed to the direct collection of short-lived daughters, however, the remainder being due to a variety of indeterminate background sources. Thus any continuous monitoring technique based on measuring accumulated lead-210 levels on an air filter or in a miner's blood comes up against serious problems. Appendices give details of Fairman's ion exchange procedure and (in summary) the dithizone separation technique.
Descriptors (primary) radon daughters; uranium mining; radiation monitoring; exposure evaluation
Descriptors (secondary) scintillation counters; radon; air sampling; alpha radiation; continuous monitoring; description of technique; mathematical analysis
Document type E - Books, reports, proceedings
Subject(s) Radiation
Broad subject area(s)
Browse category(ies) Exposure evaluation
Mining and quarrying
Inorganic substances