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02.2017
10 Source Replacement Volume 1
Preparation
All necessary work has to be prepared well so that it can be carried
out quickly to keep exposure to the unshielded source to a mini-
mum. Using a drawing of the shielding, you should plan the best
procedure and have the following tools handy:
• Allen keys sizes 4, 5, 6, 8 and 10
• 2 pairs of pliers (e.g. a pair of combination pliers or multigrip
pliers)
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 vessel, lead bricks, concrete stones, etc.) and place
the source holder and the source there on a piece of paper to pro-
tect it against dirt.
Turn the shieldings to the “CLOSED” position and secure them. We
recommend placing the individual shielding upright. In particular,
secure the rotating cylinder against tipping over before you release
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 rod source put into the trans-
port shielding as quickly as possible.
If you are working with several sources, make sure that the
sources cannot be mixed up.