Model 3440
D-19
NOTES:
1.
Radiation measurements were of a gauge containing a
nominal 8 millicuries Cesium-137 gamma source and a
nominal 40 millicuries Americium-241: Beryllium neutron
source.
2.
Gamma measurements were taken with a Bicron Micro Rem
survey meter, Serial Number B464Y calibrated in January
2011.
3.
Neutron measurements were taken with a Ludlum Model
12-4 survey meter, Serial Number 140077 calibrated in
September 2011.
4.
The symbol § denotes a radiation measurement of less than
0.2 millirem per hour.
5.
Measurement position nomenclature for the gauge and
transport case is shown in Figures 1 and 2.
6.
Orientation of the gauge in the transport case is as follows:
a.
Back of the gauge to the front of the case
b.
Bottom of the gauge to the right side of the case, and
c.
Top of the gauge to the left side of the case.
Summary of Contents for RoadReader 3430
Page 14: ...1 6 Figure 1 Model 3440 Gauge and Accessories...
Page 19: ...Model 3440 2 3 Figure 2 Direct Transmission Geometry Figure 3 Backscatter Geometry...
Page 20: ...2 4 Figure 4 Backscatter Surface Density Effects Top Layer Effect Curves...
Page 22: ...2 6 Figure 5 Effect of Moisture on Depth of Measurement...
Page 164: ...F 2 STANDARD COUNT LOG Gauge Serial Number _____________ Date MS DS Date MS DS...
