Chapter 3
RESULTS
Because of a bombing error, the estimated slant range from Shot Cherokee burst point
to the nearest station on Site Charlie was 3.5 miles. There was no detectable activity
in any of the samples when measured at H+7 hours. Gamma dose rates at Site Charlie
were background only.
Chemical analysis of two Site Charlie soil samples indicated their sodium content to
be 0.11 and 0.16 percent by weight, while one sample from Site Sally indicated 0.15percent sodium by weight. In Table 3.1, these values are compared to several values
determined for NTS soils.
The two samples of coral soil exposed to Shot Yuma showed only Na*4 activity when
first measured at H+5 hours. In Table 3.2, a summary of data on activity induced in
the six samples is given. Activities are given in dis/min-gm of sample, extrapolated
to zero time. The kinds of activity present were identified by the energies and half
lives of gamma radiation emitted. The probable error in these activation data is + 5
percent. Figures 3.1 through 3.3 show sample records for coral soil, NaC] and MnO).
Dose rates measured after Shot Yuma near Station 253.08 are shown in Table 3.3.
Gold neutron measurements made on Shot Yuma are summarized in Figure 3.4 (Reference 35).
TABLE 3.1
SODIUM AND MANGANESE CONTENTS OF
VARIOUS TEST SITE SOILS
Location
Sodium
Manganese
pet by weight
pet by weight
0.16
0.11
0.15
1.25
0.43
_
—_—
—_
0.158
0.027
Area 3, NTS
1.60
0.024
Area 4, NTS
0.95
0.032
Area 7, NTS
1.84
0.045
Area 7, NTS
1.81
0.047
Area 7, NTS
Area F, NTS
1.33
0.62
0.030
0.023
Center, Site Charlie
Shore, Site Charlie
Station 253.09, Site Sally
Area 1, NTS
- Area 2, NTS
16