Uni-Probe LB 490
BERTHOLD TECHNOLOGIES GmbH & Co. KG
1 – 53
Volume 1 7 Source Replacement
1
Cordon off an area consistent with the activity of the source. Pre-
vent persons from approaching.
Prepare a suitable clean space, if possible with an auxiliary shield-
ing (shielding container, lead bricks, concrete blocks etc.) where
you can later place the source holder and the source temporarily on
a piece of paper to protect it from dirt.
Turn the shieldings to the CLOSED position and secure them. We
recommend placing the individual shielding upright. In particular,
the rotating cylinder has to be secured against tipping over, before
releasing the head flange. Bring the transport shielding containing
the new source close to the measuring site and open it such that
the new source can be taken out and the old source put into the
transport shielding as quickly as possible.
When working with several sources, make sure that the sources
cannot be mixed up.
7.3.1 Procedure for Source Replacement
Figure 7-5 Dismantling the rotary cylinder point source shielding
Dismantling the shielding Unscrew the head flange (1) using a suitable Allan key.
Open the locking cover (2).
Hazards due to nuclear radiation!
Do not remove the source from the shielding!
Do not touch the source to prevent a high partial body dose. Only
touch the source with tools that allow you to grab the source easily
and safely, e.g. a pipe wrench. Do not push the pipe wrench tight
too much to prevent damage to the source. Hold the source far
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