strontium ispresent in, less than Tneoretical, amounts,vibnemaoors ranging
from one to ten percent,
This is thought to be true also of other fission
products having gaseous precursors.
The suggestion is thus raised that the
rate of dissolution of the particles in the soil is a factor which should
be taken into account.
It was pointed out by the Tracerlab investigators
that enough debris material is on hand to make experiments on the dissolution
and plant uptake using the actual material rather than the corresponding
soluble salts.
Detectable amounts of strontium in the bones of animals
picked up on the Alamagordo site have been reported .
The health physics problem, that is the toxicity of ingested
strontium requires a relatively smail revision.
It appears that the
toxicity of radium as estimated from Silberstein's data on radium poisoning
is slightly in error.
This error has resulted from the assumption that all of
the poisoning was due to radium, whereas it has since been discovered that
a large fraction of the poisoning was caused by meso-thorium.
According to
Marignelli radium is possibly only 1/4 the toxecity of meso-thorium so that
m
the radium mid-lethal doses should be increased by a factor of from two to 4yy
oe four.
Since the toxicity of strontium 90 was based on the experimental
Re yw
comparison of the toxicity of strontium 89 with radium in rats and on the
absolute toxécity of radium calculated from Silberstein's data the estimated
tox@city of strontium 90 must also be increased by a factor of from two to
four.
In spite of this kind of uncertainty the toxicity of strontium 90
is one of the most certain factors in the entire analysis.
Dispersion Density
The data of three groups
F9,o-is
presented in such a manner that
absolute estimates of dispersion density may be estimated.
are the BNL, KAPL and NRL.
OFsnt-c-4737,
These groups
The cloud from the Ranger Able shot fired at
"OBSERVATIONS ON FALL OUT FROM THE NEVADA TESTS, JANUARY 27
THRU FEBRUARY 6, 1951,"
Weiss and Kuper.
? KAPL-559, EVALUATION OF THE EFFECTS OF ATOMIC BOMB DETONATIONS IN THE STATE
OF NEVADA ON AIRBORN CONTAMINATION AT KAPL, KNOLLS SITE AND ENVIRONS",
Cherubum et al.,
7 May 1951.
T wWRL-3866RD-57, “REPORT ON COLLECTIONS OF RADIO-ACTIVITY FROM THE RANGER
A-BOMB TESTS", Keene et al., 1 August 1951.
+ UCLA-111, "SUMMARY OF THE RADIOLOGICAL FINDINGS IN ANIMALS FROM THE BIOLOGICAL SURVEYS OF 1947, 1948, 1949 and 1950; J. T. Leitch, 12 February 1951.
WE MoICIS OG Feroey ofte l, Kartuye Daahring Ln
the Trt,
aud Mehabrabie, f Rtrortah Kadunin "26 Yotay regs, SLbsrAe,
, DO® ARCHIVES