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RADIATION STANDARDS, INCLUDING FALLOUT
rovides upper limiting estimates of the possible numberof cases of
eukemia and bone cancer and curtailment of average lifespan that
might result from chronic exposure to fallout radiation from weapons
STS.
The true values will probably lie below these.
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As FRC Report No.
Dose rate is important: within certain limits a protracted dose is much less
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effective than the same total dose given in a short time.
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New data on genetic effects have strengthened the view that continuous low-level radiation exposure of the gonads of a population is
one-fourth and maybe one-sixth as effective as higher dose rates in
producing gene mutations.
The production of thyroid cancers in persons who as infants received
therapeutic radiation of 150 rad and moreat relatively high dose rates
to the thyroid gland or to the head and neck region is an established
fact. Incidentally, these cancers have for the most part responded
remarkably well to treatment. The significance of these observations
with respect to possible thyroid cancer induction from much smaller
radiation doses due to I**! accumulations in infant thyroids as a result
of nuclear testing is uncertain.
A full and up-to-date discussion of the health implications of radiation including fallout radiation has been developed by the U.N. Scientific Committee on Effects of Atomic Radiation, and their report will
be published in the late summer.
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Father Francis X. Roser, 8.J., director, Institute of Physics, Catholic University of Rio de Janeiro.
Dr. Luiz Renato Caldas, Instituto de Bioffsica.
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Argentina:
Dr. Dan Benison, National Commission of Atomic Energy.
Dr. Juan G. Flegenheimer, National Commission of Atomic Energy.
Mr. Alejandro Placer, National Commission of Atomic Energy.
Australia:
Mr. D. J. Stevens, director, Commonwealth X-ray and Radium Laboratory.
Dr. A. M. Clark, professor of zoology, University of Tasmania.
Belgium :
Prof. J. A. Cohen, Medisch Biologisch Laboratorium RVO/TNO, Riiswijk,
Netherlands.
Dr. J. Biock.
Brazil:
Dr. Carlos Chagas, professor at the Institute of Biophysics, University of
Brazil, Rio de Janeiro.
Dr. C. Pavan, director, Department of Biology, University of Sac Paulo.
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DELEGATES OF STATES MEMBERS OF THE SCIENTIFIC COMMITTEE ON THE EFFECTS OF
ATOMIC RADIATION
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ote alli teammatete eA oh aca 81 an eehalon aes SNAa
Chairman Ho.trrmeip. Mr. Chairman, I would like to stop there and
have you give us what information you have on the composition of this
United Nations Scientific Committee. Do you happen to have the
names of those people, the countries they come from, and their standIng as scientists ?
Dr. Dunuam. I can give you an answerfor it now, but I would like
to provide a full statement for the record. It represents 15 nations.
The information requested follows :)