IEC 62523:2010 pdf – Radiation protection instrumentation – Cargolvehicle radiographic inspection system.
C) Measure and record the ambient dose equivalent rate at 1 m ± 0,1 m above the ground level along the system boundary stated by the manufacturer.
d) If the radiation source in the inspection system moves during the scan, the ambient dose equivalent rate at each specific location on the system boundary shall be the maximum reading during this scan.
e) Additional measurements in other positions can be made based upon agreement between the user and the manufacturer, If the beam stop does not cover the full height of the radiation beam, additional measurements shall be made at occupied positions not shielded by the beam stop where the ambient dose equivalent rate may be higher than 2.5 giSv’h.
f) The ambient dose equivalent rates on the system boundary can also be measured with another reference scanned object in the scanned position based upon agreement between the user and the manufacturer.
8.4 Ambl.nt dose .qulval.nt rate at the operating positions
8.4.1 Requirements
The maximum ambient dose equivalent rate at the operating positions during the scan shall be not higher than 1,0 pSv’h1 above natural background, however, different national regulatory limits may apply.
8.4.2 T•st method
a) Measure and record the ambient dose equivalent rate in the primary forward direction at 1 m away from the radiation source as Its radiation output level.
b) Place the reference scanned object in the scanned position.
C) Measure and record the ambient dose equivalent rate at the operating positions for the crew during the scan. e.g.. the control panel and the image inspection station
d) If the radiation source in the Inspection system moves during the scan, the ambient dose equivalent rate at the operating positions shall be the maximum reading during this scan.
e) The ambient dose equivalent rates at the operating positions can be measured also with other reference scanned object in the scanned position based upon agreement between the user and the manufacturer.
8.5 Ambient dose equivalent to the driver
8.5.1 Requirements
If the dnver stays in the scanned vehicle during the scan, the ambient dose equivalent to the driver shall not be higher than 5 Sv per scan, however, different national regulatory limits may apply.
8.5.2 Test method
a) Measure and record the ambient dose equivalent rate in the primary forward direction at 1 m away from the radiation source as its radiation output level.
b) Place passive dosimeters or other cumulative dose meters as appropriate at the driver position
c) Measure and record the cumulative ambient dose equivalent from a minimum of 10 scans at the normal inspection speed,
d) The result of the cumulative dose above the natural background divided by the number of scans represents the ambient dose equivalent to the driver per scan.
8.6 Ambient dose equivalent to the object being inspected
The ambient dose equivalent to the object being inspected shall not be higher than I mSv per scan, however, different national regulatory limits may apPly.
8.6.2 Test method
a) Measure and record the ambient dose equivalent rate in the primary forward direction at 1 m away from the radiation source as its radiation output leveL
b) Place passive dosimeters or other cumulative dose meters as appropliate at the centre of the inspection dimension.
C) Measure and record the cumulative ambient dose equivalent from a minimum of 10 scans at the normal scanning speed.
d) The result of the cumulative dose above the natural background divided by the number of scans represents the ambient dose equivalent to the object being inspected per scan.
a) Additional measurements in other positions can be made based upon agreement between the user and the manufacturer.
9 Electrical safety tests
9.1 Equipment ground protection
9.1.1 Requirements
Inspection systems shall have protective circuit and the resistance between the system case
and protective earthing terminal shall not exceed 0.1 ti ( see IEC 61010-1:2001. 6.5.1.3).
9.1.2 Test method
Use a ground meter to measure the resistance between the system case and PE terminal with a test current of 25 A.
9.2 InsulatIon resistance
9.2.1 Requirements
Under the test condition shown in Table 1. the insulation resistance between the piotective circuit and each phase of the power of electric equipment with independent power supply in the inspection system shall not be less than I MtJ (see IEC 60204-1:2005, 18.3).