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In virtually all situations, therefore (except those involving hot particles — see para. 5), no further consideration of skin monitoring is necessary. 3. For weakly penetrating radiation, an additional limit is needed for skin exposure in order to prevent deterministic effects. The ICRP has recommended an annual equivalent dose limit of 500 mSv averaged over 1 cm2, regardless of the area exposed. 07 mm (7 mg/cm2). A principal contribution to irradiation of the skin in this context is that from skin contamination.

Workplace monitors should be appropriate for the intended use. Care should be taken to verify that the instrument is appropriate for the type of radiation to be measured and that its results are not seriously affected by other radiation types that might be encountered. Provision should be made for the continuous monitoring of radiological hazard levels in areas where sudden unexpected increases might result in a significant dose to an individual. These provisions will include permanently installed monitoring devices.

47, ICRU, Bethesda, MD (1992). [10] INTERNATIONAL COMMISSION ON RADIATION UNITS AND MEASUREMENTS, Quantities and Units in Radiation Protection Dosimetry, Report No. 51, ICRU, Bethesda, MD (1993). [11] INTERNATIONAL COMMISSION ON RADIOLOGICAL PROTECTION, INTERNATIONAL COMMISSION ON RADIATION UNITS AND MEASUREMENTS, Conversion Coefficients for Use in Radiological Protection Against External Radiation, Report of the Joint Task Group, ICRP Publication No. 74, ICRU Report No. 57, Pergamon Press, Oxford and New York (1997).

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Assessmnt of Occupational Exposure to Extl Srcs of Radiation (IAEA RS-G-1.3)


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