Recent R&D activities in nuclear fusion have identified the DEMO reactor as ITER successor, aiming at demonstrating technical feasibility of plants, along with their commercial exploitation. However, pulsed operation machine causes an “unconventional” system, posing unique challenges to functional steam generator, for which it is necessary define and qualify a reference configuration DEMO. ...

The safety performance of nuclear power plants (NPPs) is a very important factor in evaluating energy sustainability. Safety analysis passive and active systems have positive influence on reactor transient mitigation. One the common transients primary coolant leg rupture. This study focused guillotine large break loss (LB-LOCA) one vessels, which cold rupture occurred, after establishment stead...

The paper presents the RELAP5/mod3.3 analysis of natural circulation cooldown with one inactive loop for Nuclear Power Plant Krško (NEK). aim is to determine limiting rates during operator recovery actions minimize effect flow stagnation in loop. Since this typical asymmetrical transient, NEK model split reactor vessel was developed (models and core were axially divided two parts) used analysis...