No amount of regulation or registration will prevent someone from incorrectly calibrating a device to allow an excessive dose (radiation or otherwise). The only incident I can remember was many years ago when a physicist at a radiotherapy centre incorrectly calibrated a machine with 10 times the dose (as he had his decimal point in the wrong place). He was at the top of his scale and fully registered but still made a mistake with serious consequences.
As previously stated qualifications and regulations are meaningless in improving safety. These can only be properly tackled by proper supervision, processes and practical (hands on) training backed up by proper management.
Maybe the VRCT needs to re-think the whole idea and switch to compulsory management regulation and registration rather than going after technicians and engineers?
