Uni-Probe LB 490
BERTHOLD TECHNOLOGIES GmbH & Co. KG
1 – 45
Volume 1 7 Source Replacement
1
7 Source Replacement
7.1 Point Source Replacement
This section describes how to replace point sources in the following
shieldings:
– LB 7440
– LB 7442
– LB 7444
–LB7445
–LB7446
The replacement of radioactive sources must be carried out taking
into account the applicable regulations under the supervision of the
Radiation Safety Officer.
Hazards due to nuclear radiation!
When replacing a source, you have to work with the unshielded
source for a short time. An increased radiation dose is harmful to
health.
You have to carry a pocket dosimeter during work to measure the
actual radiation exposure. Work has to be coordinated with the
competent Radiation Protection Manager.
For Germany you have to keep in mind:
Source replacement by the customers is possible only when:
1) the respective expertise is available
2) the work required to replace the source has been approved
explicitly by the authorities in charge. Your “License to Handle
Radioactive Substances” states whether you are in possession of
such a license.
Point sources have to be fixed on source holders which are then
screwed into the shielding, positioning the source in the center of
the shielding.
Prerequisite for this work is that the personnel is familiar with the
exact shielding construction; therefore, drawings must be avail-
able.
Preparation All necessary work has to be prepared such that it can be carried
out quickly, so that exposure to the unshielded source is kept to a
minimum. Using a drawing of the shielding, you should plan the
best procedure and have the following tools handy:
• Allan keys in the required sizes.
• 2 pairs of pliers to take hold of source and source holder.
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