BROOK HAVEN NATIONAL t ABORATORY
ASSOCIATED UNIVERSITIES, INC
Upton
Pert POnM etal Frotechon wavision
Piesw
roth
(514) 345- 4250
April 23, 1981
Mr.
T.
F.
McCraw
Division af Health and
Environmental Research
U.S. Department of Energy (DOE)
Washington,
DC
20545
Dear Tommy:
Enclosed are the figures you requested for the Bikinians and other
aopularions.
Dratted figures are included for Sr~-90 and Cs-137 for
Rongelap, Bikini and Utirik residents.
Bikini mean adult body burdens
which equal the minimum detection limit for the procedure are estimated
ror Pu-239.
Figures illustrating Co-60, Fe-55 and Zn-65 are being drafted
presently.
Hand drawn copies are included with this letter.
The figure with Pu-239 results
illustrates our upper limit estimate
of the body burden.
These estimates are different for the ingestion or
inhalation pathways.
The two curves illustrate the resuits obtained when
one assumes that the urine activity corresponds to (a)
an inhaied uptake
or (b) an ingested uptake. The minimum detectable inhalation burden
corresponds to an average derived air concentration of 309 fCi m-3, much
greater than that observed by Robison (UCRL-52176).
The minimum detectable
ingestion burden corresponds to 4 uCi yr=l,
This is much greater than
that predicted by Robison. Our opinion is that our minimum cetectable
results can be many times larger than the actual body burden of Pu-239 in
this population.
If you need further illustration of our data or require additional
information, please do not hesitate to ask.
Best regards,
booV dewwl
Edward T.
ETL/slg
Enclosure
ce:
B.
Wachholz
Lessard
5
11.7%