Radiological Safety Information vii
Document 40272-0700
Radiation Measurement Testing Data
1. All measurements were taken with Technical Associates Model Pug-1
survey meter. The meter was cross calibrated against an air ionization
chamber survey meter whose response was corrected against an
Americium-241 test source.
2. Source Shutter closed - The radiation levels are less than 0.05
MR/HR at distances greater than 5 cm from any surface of the gauge
(including inside the tunnel).
3. Source Shutter open - The extent of the main gamma beam is
completely contained within the tunnel formed by the inspection head
and shielding bar. All radiation levels outside the main beam are less
than 0.05 MR/HR.
4. The exposure rate in the main beam is measured to be approximately
60 MR/HR at 5 cm from source enclosure containing 300 millicuries.
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