Od 1 4
-Df¢-/7/
This Boenmen- ees Zo +
5 CE
es Peer eae
SOME POST EXPOSURE STUDIES *
This 33 cepy....7....... cnae "oe fR.
D
NARY URANIUM
We?
An evaluation of enriched uranium excretions of employees who
had been exposed to excessive air-borne concentration of the metal
and its compounds for periods of time ranging from two to eight years
necessitated the termination of subsequent exposure of 21 employees
who had been excreting hign concentrations of the product level material.
Exposures were terminated by re-assigning the 21 cases of over-exposure
to work completely devoid of the handling of uranium or its compounds.
Immediately following the re-assignment of the work complete
- physical examinations were conducted upon the grouv.
No significant
body damage was detected.
During: the post-exposure period, urine specimens were submitted
at a frequency of one per day for the first four weeks, thence after,
one per week.
Uranium concentrations found were plotted on semi-log
paper from which tremendous fluctuations were noted and hence, dictated
a Statistical analysis - the least squares curve fitting technique.
The
employees returned to their original work when the excretion level, as
1§ol1ods
determined by the best fitting curve, coincided with the average excretion
of the other employees.
At some 200 days post exposure, all of the
worklocations.
wo.
21 returned to their original
weSr ler bijoie
ye
.
- ay
Sects oe
ote te ee oe
icity
BY osi 4,
a
aa
GSR 3! A
a
lew b-LED
et
7 op
Coe
USA
et
0
CG