Mechanizm uszkodzenia połączeń gwintowych kolektorów wytwornicy pary

Examination results and their interpretation is presented for the explanation of the mechanism of cracks occurring in the threaded holes and bolts of the cover - flange connections of the nuclear power plant steam generator collector. The factors that initiate the failures have been established, while considering the influence of both the components of water penetrating from the primary circulation to the secondary circulation, as well as the grease used in bolt - flange threaded connections during assembly.