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APPENDIX III 6 7
TABLE XIV. MICROCURIE-DOSE FACTORS FOR CALCULATING
ENVIRONMENTAL DOSES
Isotope
U nits o f m rem /fiC i intake
Units o f
% M PRI/(JCi in take
GI tra ct a T o ta l b o d ya Thyroid a
B o n e'3
M axim um in divid ual
z4Na 6 . 2
1 .7
. .
32 p
21 7 . 4 6 . 2
51Cr 1 .2 - - -
64Cu 4 . 6 - - -
65Zn 9 .6 6 . 5 0 .1 2
16As 77 - - -
131j - - 1700 Adult -
17 000 C hild
239Np 19 -
-
R E +Y C 50 - - -
24Na 6 . 2
T y p ic a l R ichland Resident
1.7 - -
32 p
21 7 . 4 - 19
51C r 1.2 - - -
64Cu 4 . 6 - - -
65Zn 9 .6 65 - 0 .3 7
76As 77 - - -
131 j - - 1700 Adult -
17 000 Child
239Np 19 -
-
R E +Y C 50 - - -
a M icro cu rie-d o se fa cto r: T h e dose in m rem th at 1 juCi o f an ingested rad ionuclide w ill d eliv er
to a given organ e ith er over an in fin ite period o f tim e from an acu te in ta k e , or over a o n e-
y e a r period when equ ilib riu m con d itions are m ain tain ed by a constan t d aily in ta k e . A ll
rad ionuclides w ere considered to be in soluble form for com p u tation o f dose fa cto rs. It is
reco g n ized that the dose lim it for the to ta l body is based on exposure to the gonads and red
bone m arrow . T h e dose facto rs used here for the to ta l body assume a uniform d istrib u tion,
k In the case o f bone the fa cto r is'exp ressed in per c e n t o f m axim u m perm issible rate o f in ta k e ,
i . e . 100°/o is equ iv a len t to the M PRI.
c Rare earths plus y ttriu m .