VVER 440 Reliability Data Used for PSA Studies

The paper presents the methods used for the reliability parameter calculations. The method includes full procedure of a plant specific data gathering and processing for the purposes for full and low power conditions and shutdown states for V1 WWER 440/V230 and V2 WWER 440/V213 located in Jaslovske Bohunice, Slovakia. Presented calculations include unavailability due to maintenance and test as well as some special cases. More detail description of sources plant specific data used for final elaboration as well as software used for reliability parameters calculation is given. Different software output files present data formats required not only by PSA models including calculation background for defined component groups. Based on the quality of the presented VVER 440 data VU´JE Trnava was contracted by U.S. DOE to support its PSA activities in Russia.