[en] The paper presents the results of the implementation of SFAT for verification of spent fuel at various types of nuclear reactors. The device has been used in those cases where the improved Cherenkov Viewing Device (ICVD) could not provide conclusive results. The paper summarises the experience gained in using SFAT for verification of spent fuel at facilities in Europe. The measurements were performed at Boiling and Pressurised Light Water Reactors of Western design, at WWER-440 and WWER-1000 reactors, and at Research Reactors of MTR type. The experience proved that SFAT can be successfully used for verification of spent fuel. In order to achieve best verification results, the SFAT must be carefully optimised taking into account the fuel assemblies' design features, storing arrangements and irradiation history. (author)