Chapter 9 Maintenance
Mini-Switch LB 471
9.5 Replacing the Source
A source has to be replaced if the statistical fluctuations reach an
unacceptable level in the course of time and compensation by in-
creasing the time constant is not permitted any more, e.g. for con-
trol engineering reasons.
If a source has to be replaced, the source number of the previous-
ly used source has to be stated on the re-order. The source num-
ber is stated on the type label of the shielding and on the seal cer-
tificate of the source.
Only competent and licensed persons, in compliance with the offi-
cial regulations, may replace radioactive sources. Coordination
with the radiological safety officer is required.
All work required has to be prepared such that it can be carried
out quickly, so that exposure to the unshielded source is kept to a
minimum. Since these persons have to work with an unshielded
source for a short time, they have to carry a pocket dosimeter
indicating the level of radiation in order to document the actual
radiation exposure during work.
The user has to be familiar with the radiation protection guidelines
in Chapter 11.
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