‘
WT-1340
-
EVALUATION OF SELF-RECORDING THERMAL RADIATION INSTRUMENTS.
Cperation REDWING.
L. K. Goodwin, et al; Final Report, March 1959.
oe BEST AV
AILABLE COP
Ss
(Surersedes ITR-1340).
Y3 .ervat
Three types of self-reco
_ Indicators were tested for response to maximum (40-cal/em@), optimum
'(20-cal/em@), and minimm (3-cal/em@) values of radiant exposure from a
“ miclear detozation.
These were the Chemical Corps self-recording calori-
"meters, Type 1 and Type 2, and the Kidde pulse recorder.
The Chemical Corps
thermistor célorimeter was used as a relative standard. The tests of the Type}
and Type 2 Chemical Corps self-recording calorimeters on Burst Cherokee resulteg
S
in the conclusion that the Type 1 instruments were unsatisfactory and that the
Type ¢ instrm=oments successfully integrated radiant exposures of long duration.
Because of station contamination resulting from a burst prior to Blackfoot,
instrument fimctioning for short-duration pulses was not determined; there-
instruments.
The data obtained with these instruments were compared with
that obtaine= by NRDL at essentially the same locations.
This comparison of
the results es measured by the thermistor instrument, Type 2 self-recording
calorimeter, and NRDL disk calorimeters*shows good agreement (within + 12%)
cannedsiaeniin
fore, the Kicde pulse recorder did not receive @ valid test. The actual
air zero for Burst Cherokee deviated considerably from the planned air zero,
resulting in a significant angle of incidence of the thermal energy on the
of the mean values,
WI-1410
-
{
SOIL ACTIVATION BY NEUTRONS.
cperation PLUMBBOB,
Philip W. Krey, Edward F. Wilsey, John H, McNeilly, Doris D.
Peterson, and Ernest W. Bloore, May 1960.
S=CRET-RESTRICTED DATA
of
(Supersedes ITR-1410).. An investigation was made of the induction
gamma-enitting radioisotopes in homogeneous soils by nuclear detonations
and the subsequent generation of hazardous radiation levels inthe vicinity
of these detcnations, so that the radiological hazard to personnel in these
areas coula eventually be predicted.
Three test soils were used:
Dade fine
sandy loar w~nich has a high silicon content and low mineral content; Chester
loam whick rss a strong aluminum concentration and a fairly high manganese
content;
Nevada Test Site soil which has a large sodium composition,
Significant alumimum and manganese content. and is the natural terrain over
which the deconations at Plumbbob took place. The test soils were exposed
during Burst Owens at distances of 200 to 500 yards from ground zero, and
core samples of each soil were recovered.
Induced field surveys were made
during Burszs Franklin, Lassen, Wilson, Priscilla and Owens. On the basis
- of the soils tested and the data obtained, the induced dose rates generated
"
by a nuclear detonation over the soils tested can be predicted by the method
of Kaufman +ithin a factor of two-to-three from either copper or thermalpou
yl
-
REoT
RGY =
54
wan
|