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Attachment 1
T {ly Radionuclide Intake Associated With The Maximum Permissible
Body Rurden*
‘Tog
——a
Max. permissible burden, occupational exposure, 30 uCi (5 rad/yr)
"
"
"
"
individuals in pop., 3 pCi (.5 rad/yr)
suitable sample, 1 pCi (.17 rad/yr)
Effective half-life is 100 days (See FRC Report No. 7, page 25).
,
For conditions of continuous intake, the daily intake associated witha
gion equilibrium organ burden can be determined fram the following:
By = Ro Th I.
where B, = Equilibrium organ burden
Ry = Daily intake
Th = Mean time in reference organ
-I f ve Fraction of intake reaching reference organ through ingesti:n
"References are, (1) Report of ICRP Committee II as published in
Health Physics, June 1960, and (2) AEC 0524, June 1967.
QTC, USE SRY