7 Maintenance and Repair
Shields for Flange Mounting
38
44192BA2, Rev.03, 07/2021
7.3
Leak Test
Depending on the supervisory authority responsible for the area where the source
is used, regular leak tests must be carried out. These tests are to be carried out at
the discretion of the competent supervisory authority either by an authorized
expert or by the manufacturer. For this test, the corresponding source
documentation must be made available.
Required Documents
•
Inventory list of the sources to be tested including indication of previous leak
tests.
•
Source certificate containing the following information: Nuclide, activity,
procurement date, physical/chemical form, description of the enclosure and
type of sealing, resistance against mechanical and thermal influences or
classification of the source design. The source certificate is provided together
with the source.
•
Information on the location, application as well as on the maximum customary
mechanical and thermal strains.
•
If the source is installed in a device, a drawing is to be provided. In the drawing,
the position of the source and of all parts intended to protect the source against
external influences must be clearly indicated. Recommendations regarding the
most appropriate test method should be given, e.g. by indicating alternative
test areas. If required, recommendations should be given on how the necessary
test can be conducted without affecting the functionality of the system or
device.
Alternative Test Areas:
Alternative test areas are areas of a shield which will most likely be contaminated
if a source is leaking.
Fig. 18
Alternative test area
The following alternative test area of the shield can be used:
•
the area marked in grey in Fig. 18.