General Concepts for the Dosimetry of Internally Deposited by National Council on Radiation Protection

By National Council on Radiation Protection

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Extra resources for General Concepts for the Dosimetry of Internally Deposited Radionuclides (N C R P Report) (Report No. 084)

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The NCRP considers that both of these bodies of data should be an important component of any scheme for limiting the risk from exposure to bone-seeking radioelements. 1 pg n6Ra, using traditional assumptions regarding distribution and quality factor, leads to a value of about 30 rem/year to a 10 pm-thick endosteal tissue layer lining the medullary cavities and to a value of about 50 rem/year when the Haversian canal endosteal surfaces are included. This calculated dose could be raised or lowered somewhat with other assumptions.

Inhaled. 3 Transfer of a Radionuclide from the Lungs Directly to Body Fluids or to the Gastrointestinal Tract From Fig. 2j) it can easily be seen that the rate of transfer of a radionuclide directly from the lungs to body fluids (BF(t)),is given by whether the radionuclide is inhaled or produced in the lungs.

10) Reexamination of biokinetic models for many important radio34 6. RESEARCH NEEDS / 35 nuclides, especially with regard to transfer factors between gut and blood, kidney and urine, etc. (11) Much more formal and detailed determination and statement of the uncertainties attending the processes and parameters involved in development and application of radiation protection systems for radionuclides in the body. 7. Summary Statement of NCRP Position on Control of Internal Dose (with special reference to ICRP Publications 26 and 30) The principal objective of an occupational radiation protection system must be the prospective regulation of the workplace.

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