[en] The paper describes the practical implementation of the idea of 3S: safety, security and safeguards synergy, which was widely discussed at the relevant forums, in particular at the Seoul summit. The idea was aimed at improving the efficiency of the cooperation between these elements, which have relatively large number of common points, but at the same time have their proper features. Careful consideration has showed that the sphere of non-destructive testing is the most appropriate one to start 3S synergy implementation. Non-destructive testing methods and devices are widely applied in each S-element and could quite often be retargeted. The prototype of closure weld seam was inspected by the means of standard ultrasonic echo-pulse method. However, the collected data was processed with developed mathematical algorithm, that allows to use this information for security and safeguard purposes as tagging instrument. The main challenges for industrial application were defined.