[en] In this paper, generic data used in performing reliability analysis is presented as well as the attempts to collect plant specific data at NPP Krsko. The categories of generic data are given and the different contributions for failures. The attempt to standardize literature data base is discussed in more detail. The list of the sources of generic data available at our Institute is given. At the end the deterministic analysis used for the selection of special success or failure criteria for the development of event trees are presented. (author)