Primary water stress corrosion cracking(PWSCC) is an important issue for dissimilar metal welds(DMWs) in pressurized water reactors(PWRs) due to mainly high weld residual stress(WRS). With regard to the PWSCC evaluation, while the well-known grown crack analyses have been widely adopted in general, they are repeatative and may not realistic. In the present study growing crack analyses based on boundary element method(BEM) were carried out for a typical pressurizer surge nozzle and their results were compared with those obtained from the conventional grown crack analyses. As anticipated, the final crack shapes were different so that the maximum difference of stress intensity factors(SIFs) for a circumferential crack was 21.69 % and 5.12 % for an axial crack, respectively.