Implementation of a graphical user interface for safety analysis of the ROSA/LSTF hot-leg break experiment

Today, most software applications, also in the nuclear field, come with a graphical user interface. Recently, the Symbolic Nuclear Analysis Package (SNAP) was designed to simplify the process of performing safety analysis. The purpose of the present study was to develop an SNAP animation model for RELAP5 calculations of a nuclear installation. The facility selected was the Rig of Safety Assessment/Large Scale Test Facility (ROSA/LSTF), which is a simulator of a four loop pressurized water reactor. The source data needed for animation were obtained by the RELAP5/MOD3.3 Patch 04 computer code. A scenario of the hypothetical smallbreak loss-of-coolant accident in the hot-leg of the reactor coolant system was simulated. The SNAP animation of the ROSA/LSTF facility was used for presentation of the physical phenomena and processes. It can be concluded that the developed animation model significantly helps in the safety analysis and the analysis results can be presented to a wider public in an easy and understandable way.