Graphic display system for ROSA-V Large Scale Test Facility

A loss-of-coolant accident (LOCA) is a postulated accident in a light water reactor (LWR) in which the reactor coolant is lost through a pipe break. Experimental simulation of LOCA situations has been conducted using the ROSA-V Large Scale Test Facility (LSTF). This facility is equipped with detailed measurements, over 2400 channels in total, of thermal-hydraulic variables. Because the simulated phenomena involved complicated thermal-hydraulic interactions among many components, the interpretation of data has been requiring considerable time of experienced engineers. A graphic display system was therefore built recently to visualize the water distribution, temperature distribution, flow, etc. in the facility real time with the aid of a workstation. The graphic images can be produced also from recorded data. This system has greatly helped engineers make timely decisions during experiments, understand complicated transient phenomena, and communicate with foreign partners. (author)