Chapter 4—Monutoring Accidental Radiation Releases *
Figure 4-6—Typical RAMs Array for Tunnel Shot (“Mission Cyber,” Dec. 2, 1988)
Surface Locations
Subsurface Locations
Ye
“oo
Tazssssss
@ RAM Locations
Scale
hK— = 200
A total of 41 RAMs (15 above the surface, 26 belowground) are used to monitor the containmentof radioactive material from a horizo
tunnel test.
SOURCE: Modified from Department of Energy.
Thermoluminescent Dosimeter (TLD): When
heated (thermo-), the TLD releases absorbed energy
in the form oflight (-luminescent). The intensity of
the light is proportional to the gammaradiation
absorbed, allowing calculation of the total gamma
radiation exposure.
GammaRadiation Exposure Rate Recorder: A
pressurized ion chamber detector for gammaradia-
tion is connected to a recorder so that a continuous
record of gammaradiation is obtained and chan;
in the normal gammaradiation levelare easily se
Microbarograph: This instrument measures ¢
records barometric pressure. The data are useful
interpreting gammaradiation exposure rate recor
At lower atmospheric pressure, naturally occurr
radioactive gases (like radon) are released in gre:
amounts from the Earth’s surface and their radio
tive decay contributes to total radiation exposure