Abstract
AbstractThe Instituto de Pesquisas Energeticas e Nucleares (IPEN) manufactures192Ir and 60Co sealed sources used in industrial gamma radiography projectors. Most of these gamma projectors are also certified as Type B(U) packages. Before each source exchange, or in case of any irregularity verified by the user, these projectors are inspected at IPEN. The inspection of the projectors consists of verifying the general condition of the projector, monitoring the maximum radiation levels (MRL) on contact, monitoring the external non-fixed radioactive contamination of the projector, remote control and source guide tube, testing the exposure and retract movement to evaluate the projector–remote control–source guide tube assembly, and testing the source lock. Projectors that show problems regarding their general condition or in the remote control, or if they fail any of the 'GO–NO-GO' gauge tests, are not reloaded. After source reloading the MRL on contact and at 1 m are measured in order to comply with dangerous ...
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