Sampling based uncertainty analysis of station blackout in PSB VVER integral test facility

► SBO analysis in PSB VVER ITF has been carried out using RELAP5/MOD3.2. ► Uncertainty and sensitivity analysis is carried out with sampling based approach (LHS). ► Experimental/code calculated values are within the uncertainty band. ► Linear regression analysis is carried out to get order of importance of input parameters. ► This methodology can be used for transients of NPP with any best estimate system code.