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...

Abstract In developing the PeLUIt 150 MW nuclear power plant based on High Temperature Gas-cooled Reactor (HTGR) technology, with helium-coolant and output thermal of MW, simulator is also developed for training operators educating other technical personnel. Referred to balance (BOP) design PeLUIt, utilized vPower simulation platform simulate secondary loop generation a water-steam Rankine cycl...