Calculating LOCA system effects

摘要

A system-level demonstration of the recently developed FSLOCA™ methodology has been provided over the full range of postulated break sizes. For small breaks, the important phenomena of two-phase critical flow, horizontal stratification, loop seal clearance, and core mixture level have been illustrated.rnFor intermediate breaks, the phenomena related to break flow and accumulator injection have been shown. And for large breaks, the phenomena related to blowdown flow reversal/stagnation, ECC bypass, and steam binding (entrained droplets that vaporise in steam generator tubes, impeding core reflooding) have been illustrated.