VEGA VEGASOURCE 31 - Manual (Page 41)

41
7 Maintenance and fault rectification
VEGASOURCE 31 •
38131-EN-130415
2. Let the samples analyze by an authorized organisation. A radia-
tion source is judged untight when more than 185 Bq (5 nCi) are
detected in the sample of the tightness test.
Note:
The specified values is valid for the USA. national regulations can
prescribe other limit values.
If the source is probably untight, carry out the following steps:
•
Inform the radiation safety officer
•
Take suitable measured to avoid contamination of the environment
by the source. Secure the source.
•
Inform the responsible authority that an untight source was
detected.
Tip:
If you are operating a version with increased protection against dust
and moisture (version D, M, N), the source is protected with two
additional seals. The condition of the seal can be judged more easily
using the following methods.
Hang an identical seal onto the source container with a wire or small
cable strap so that it is subjected to the ambient conditions. From the
condition of this seal you can draw conclusions about the condition of
the installed seal.
If the seal on the outside become porous or defective, you probably
also have to exchange the seals of the source holder.
7.5 Rectify faults
The operator of the system is responsible for taking suitable meas-
ures to rectify faults.
The radiation safety officer is responsible for all matters having to do
with radiation protection, especially ensuring that the radiation protec-
tion ordinance is observed, and can prescribe appropriate measures
if problems or malfunctions occur.
In case of troubles, call in urgent cases the VEGA service hotline
under the number +49 1805 858550.
The hotline is available to you 7 days a week round-the-clock. Since
we offer this service world-wide, the support is only available in the
English language. The service is free of charge, only the standard
telephone costs will be charged.
7.6 Reaction in an emergency case
The action in an emergency case described here, must be applied
immediately in the interest of the safety of the staff to secure an area
in which there is an unshielded source or is assumed.
An emergency situation exists if a radioactive isotope is no longer in-
side the source container, if the source container cannot be switched
to position OFF or if an increased local dose rate was detected in the
proximity of the source container.
Reaction when malfunc-
tions occur
24 hour service hotline
Immediate measures