SENSseries LB 480 Level measurement
BERTHOLD TECHNOLOGIES GmbH & Co. KG
2 – 205
Volume 2 2 Installation
2
2.6.5 Flange Shieldings in the Dip Tube
Increased radiation dose due to open beam channel!
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 source
inside the vessel. Essentially, this does not change the function and
the basic arrangement, as shown in Fig. 2-30. 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 shielding is installed
on the vessel from above, then the source is lowered into the pro-
tective pipe via 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.
Fig. 2-29 Flange shieldings for rod source and point source
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