IJS Animation Model for Krsko NPP. International Agreement Report

摘要

The Krsko nuclear power plant (NPP), which is a two-loop pressurized water reactor, Westinghouse type, before modernization in 2000 obtained plant specific full scope simulator. With the RELAP5/MOD2 computer code reference calculations of some design basis accidents were performed for the verification of Krsko Full Scope Simulator in 2000. In 2004 annual ANSI/ANS validation was performed using RELAP5/MOD3.3 computer code. In spring 2007 Slovenian Nuclear Safety Administration (SNSA) expressed interest to upgrade the Nuclear Plant Analyzer (NPA) of Krsko nuclear power plant (NPP), developed for SNSA in 1997. The advantage of using NPA were developed masks, however the animation tool was rather obsolete. In addition, the RELAP5 input model including nodalization was changed after plant modernization in 2000 requiring modification of old masks. On the other hand, Symbolic Nuclear Analysis Package (SNAP) was modern tool still developing, but it use requires to start from scratch (no masks available). Therefore capabilities of SNAP version 0.27.3 were investigated first. SNAP besides animation offered also plotting through AptPlot. Due to these facts it was decided to make support to the analytical tools based on SNAP.