DEPARTMENT OF HEALTH, EDUCATION, AND WELFARE
PUBLIC HEALTH SERVICE
R
L003 7-7
FOOD AND DRUG ADMINISTRATION
ROCKVILLE, MARYLAND 20852
January 24, 1973
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Dr. Nathaniel F. Barr
Asst. Dir. for Measurement & Evaluation
Div. of Biomedical & Environmental Research
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U. S. Atomic Energy Commission
Washington, D. C. 20545
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Dear Nat:
As I promised I'm jotting down several comments that came to mind
at the recent Kniwetok Radiological Assessment Review Group. These
comments may or may not prove to be important, but I think that they
deserve some further attention and evaluation at this time.
I urge you to cbtain some information on the particle size distribution
of plutonium in surface soil, particularly in the so called "hot" areas.
This information is essential for evaluation of the potential for particle redistribution by wind, and hence in determination of the
potential for human inhalation.
I would particularly sample those
sites at which plutonium deposition originated by processes other
than ordinary testing.
Attention should also be directed toward evaluation of radionuclides
which although they are not thought to be significant contributors to
radiation dose under usual conditions may, because of the magnitude of
the test program at Eniwetok have accumulated to a greater extent than
in global fallout.
Specifically I refer to 1291, 3H ana l4c.
Sampling
‘and evaluation of these radionuclides need not be extensive unless a
real problem is indicated by the initial results.
Best personal regards.
Sincerely yours,
Nit Awbibe rf oroad wy
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