73
3.2 Verification of the device
The devices should be verified during use (periodic verification
at least annually), as well as after repair.
3.2.1 Verification operations
During verification the operations presented in Table 3.2 should
be performed.
Table 3.2 - Verification operations
Operation
Verification
technique No.
1 External examination
3.2.4.1
2 Testing
3.2.4.2
3 Calculation of the main relative
permissible error limit during gamma
radiation DER measurement
3.2.4.3
4 Checking the ability to identify the
radionuclides and their categories
3.2.4.4
5 Determination of the main relative
permissible error limit during gamma
radiation DE measurement
3.2.4.5
3.2.2 Verification instruments
The following instruments that should be used for verification are
given in Table 3.3: