BERTHOLD TECHNOLOGIES Uni-Probe LB 490, Руководство пользователя

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2 Installation Volume 2
2.5.6 Flange Shieldings in the Dip Tube
Increased radiation dose due to open beam path!
A too high dose of radiation may be harmful to your health.
A source may be transported only in its shielding. The shielding
must be closed during transportation and installation.
Special vessel constructions may require installation of the rod
source inside the vessel. Essentially, this does not change the func-
tion and the basic arrangement, as shown in Figure 2-35. Due to
the shorter distance between source and detector and due to the
fact that only one vessel wall has to be irradiated, the required
source activity can be reduced significantly. For this arrangement,
the source is often delivered in a so-called flange shielding which
can be placed onto the flange of the protective tube. If the shield-
ing is installed on the vessel from above, then the source is lowered
into the protective pipe using a steel rope. For installation of the
shielding in a vessel from below or from the side, a shaft core is
used to insert the source into the protective pipe.
Figure 2-34 Flange shieldings for rod source and point source