Qualitative Experimental Study About the Safety Injection in the Cold Leg of a Reactor Pressure Vessel

This paper presents the experimental results of a qualitative study concerning the physical phenomena present in a cold leg and the downcomer of a reactor pressure vessel during a safety injection scenario. This project contributes to the plant life time project. Single-phase and two-phase scenarios have been studied according to the thermal-hydraulic behavior obtained by system codes. This paper shows different physical phenomena visualisations concerning the behavior of the fluid flow at different location in downcomer and in cold leg and physical phenomena in a uncovered cold leg.