BERTHOLD TECHNOLOGIES LB 8300, Руководство по эксплуатации

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Rod source shields LB 8300 6 Maintenance and Repair
64217BA2 Rev. 00, 10/2017
39
6.6 Source replacement
When to replace the source
Generally, the radioactive source used enables a service life between 5 and 10
years. A replacement of the source is only required if the statistical fluctuations of
the output signal are inadmissibly large and compensation by increasing the time
constant is no longer possible, e.g. for control-technical reasons.
Manufacturer’s number for reordering
When reordering, always indicate the manufacturer’s number of the source used
since the new source must correspond to the original version.
The manufacturer’s number can be found on the type plate of the shield as well
as on the individual seal test certificate of each source.
6.6.1 Replacing the source
Replacing the source does require the direct handling of the unshielded source.
You must clarify with the responsible supervisory authority in advance whether
your license for handling radioactive substances comprises handling unshielded
sources.
In any case, the source may only be installed/removed by authorised persons. The
competent radiation safety officer is responsible for planning and monitoring the
work.
NOTICE
In order to keep the exposure to radiation during the removal / installation of
the source as low as possible, all persons involved should familiarise
themselves with the exact procedure in advance.
NOTICE
Only remove / install the source in areas with closed floors. Any apertures
which are larger than the external diameter of the source (14 mm) are to be
covered before commencing any work.
To replace the source, the following tools are required:
•
pliers to securely grip the source
•
12 mm hexagon wrench to unscrew the screwed sealing plug of the source
holder
•
M3 threaded rod (approx. 50 mm)