Abstract
Survey results are of little value if the data is not effectively communicated and understood by radiation workers. The radiological status of plant areas must be communicated to individuals by means of a zoning and posting convention. To be effective a standardized nomenclature for the various radiological zones should be established and utilized to demarcate radiological areas. Licensing authorities throughout the world have established standardized posting terms and designations for use in their areas of jurisdiction. Various conventions may use a color code or number designation to classify the magnitude of radiation levels or contamination levels present within a given area. The radiological sign posting convention promulgated by the US Nuclear Regulatory Commission in Part 10, Chapter 20 of the Code of Federal Regulations (10CFR20) is presented here.
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Notes
- 1.
This value is based on the previous units of dpm per unit area and is approximately equivalent to 1,000 dpm/100 cm2 or 4.5 × 10 −6 µCi/cm2. Based on practical considerations this value may be rounded up to 20 Bq/100 cm2.
- 2.
The CEGB is no longer in existence.
Bibliography
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International Atomic Energy Agency, Safety Guide No. NS-G-2.7, Radiation Protection and Radioactive Waste Management in the Operation of Nuclear Power Plants, Vienna, 2002
United States Nuclear Regulatory Commission, Consolidated Guidance: 10CFR20 – Standards for Protection Against Radiation, NUREG-1736, Washington, D.C., 2001
United States Nuclear Regulatory Commission, Control of Access to High and Very High Radiation Areas in Nuclear Power Plants, Regulatory Guide 8.38, Washington, D.C., 1993
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Prince, R. (2012). Demarcation of Radiological Zones. In: Radiation Protection at Light Water Reactors. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-28388-8_5
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DOI: https://doi.org/10.1007/978-3-642-28388-8_5
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