History of Radiation Protection Guidelines for Cerium Radionuclides

NCRP Scientific Committee 2 adopted the policy of expressing [Pg.69]

From the biological data obtained by using cerium radionuclides and a comparative study with other members of the lanthanide family, the following biological parameters were selected and used in calculating q, (MPC)a, and (MPC)W values for cerium (ICRP, 1959) fi = (the fraction of ingested radionuclide reaching the blood) 0.0001 [Pg.70]

The dose to bone included a relative damage factor, n, in addition to the quality factor, QF (then termed RBE). The n factor represented the relative effectiveness of the dose from the radionuclide as compared with the dose equivalent from 226Ra. The assumptions used by both NCRP and ICRP in making this comparison of bone seeking radio- [Pg.70]

The (MPC) a values were calculated by using the assumption that the radioactive material is taken into the body at a constant rate each day and that biological elimination from the lung follows a simple exponential law. In a 24-hour day, the ICRP standard man, now called [Pg.71]

Distribution Readily soluble compounds Other compounds [Pg.72]

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