Measurement of man's exposure to external radiation
After outlining briefly the rationale for personnel radiation monitoring with integrating detectors, a review is presented of some developments which have taken place in personnel and environmental dosimetry during the past 3.5 years. The results of a pilot field experiment concerning the stability of film and thermoluminescent dosimeters (TLDs) in four Latin-American countries are summarized. It shows that film dosimeters should be used only with caution, and in locations with a moderate climate. A survey is being conducted on the current status and trends in personnel monitoring, involving detailed questioning of over 150 laboratories in about forty countries to obtain information on the type of service and detectors, evaluation and recordkeeping, additional applications, problem and development areas, intercomparisons, practical experiences with different systems, administrative and legal aspects, etc. According to the preliminary results, the trend is away from photographic film and towards mostly automatic TLD systems, not only in the industrialized countries but also in several of the larger and more advanced developing countries. The need for higher quality standards and frequent performance tests under realistic conditions is emphasized. Differences in the requirements for personnel and stationary environmental dosimeters are outlined. As evidenced by the results of a recent international intercomparison of such dosimeters under laboratory and field conditions, involving 56 dosimeter sets from eleven countries, reasonably accurate results can be obtained with several TLD systems including LiF, CaSO$sub 4$:Dy, and CaF$sub 2$:Mn; however CaF$sub 2$:Dy is less reliable than the others and film is not adequate at all. Transit doses were found to be erratic and frequently high. Limitations in the assessment of population doses from stationary detector readings are discussed. (auth)
- Research Organization:
- Oak Ridge National Lab., Tenn. (USA)
- NSA Number:
- NSA-33-000894
- OSTI ID:
- 4173618
- Report Number(s):
- CONF-750738-1
- Resource Relation:
- Conference: 2. Latin-American conference on medical physics and radiation protection, Belo Horizonte, Brazil, Jul 1975; Other Information: Orig. Receipt Date: 30-JUN-76
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
N46120 -Instrumentation-Radiation Detection Instruments-Radiation Dosimeters
560151* -Biomedical Sciences
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*PERSONNEL DOSIMETRY- COMPARATIVE EVALUATIONS
*PHOTOGRAPHIC FILM DOSEMETERS- COMPARATIVE EVALUATIONS
*THERMOLUMINESCENT DOSEMETERS- COMPARATIVE EVALUATIONS
RADIATION DOSES