UNCLASSIFIED
IX.
(U)
CHEMICAL RESEARCH AND DEVELOPMENT LABORATORIES.
(CRDLR)
CRDLR - 3005
-
-
SEVERAL AMERICAN SOILS (U).
5S.
(u)
ESTIMATION OF GAMMA DOSE RATES FROM INDUCED ACTIVITY IN
B.
Kaufman,
July 1960.
Pp.
We
Krey,
de
H.
McNeilly
and
CONFIDENTIAL
R.
.
de
Smith,
.
A theoretical equation for predicting the dose rates from neutron-
induced activities in soil is derived.
Dose rates calculated with the data
from a nuclear device detonated at 524 feet above Nevada soil are compared
to the empirically determined dose rates for the same detonation.
The dose rates generated over three other soils are calculated by
the equations derived in this report and compared with the dose rates
calculated by three other prediction methods.
The theoretical equation derived in this report to predict the
dose rate produced by induced activity in soils agrees with empirical dose
rates within 50%.
The predicted dose rates are lower than the empirical
values at small slant ranges and higher af slant ranges greater than 1,200
yards.
CRDLR - 3008
(v)
-
MULTIPLE COLLISION THEORY NEUTRON DOSE VERSUS SINGLE
COLLISION THEORY NEUTRON DOSE (U).
J. H. McNeilly, J. W. Kinch and D. L. Rigotti, July 1960.
SECRET-RESTRICTED DATA
A corparison of neutron dose calculations based on the miltiple
collision theory is made with neutron dose calculations based on the
single collision theory.
The comparison consists of experimental measurements made at
nuclear weapons tests where 99 sets of data were obtained.
The results of this investigation show that the multiple collision
theory dose is significantly greater than the single collision.theory dose.
The average ratio of the multiple collision dose to the single
collision dose is 1.49+0.08.
WNRC
0"
as
a
.
The above ratio holds for all the measurements made by this
_laboratory for the devices studied.
UNCLASSIFIED
™
15