Experimental verification for the long-term SWR model of the SELPSTA code

The sodium-water reaction (SWR) event occurring in a steam generator (SG) of a liquid metal reactor (LMR) is one of the key issues for the system design. In the long-term period of the SWR phenomena, an initial wave propagation effect is subsided and the system responses depend only on the characteristics of the bulk motion with the quasi-steady pressurization of the system due to a continuous chemical reaction. From previous studies, a long-term SWR model reflecting the mass and energy transfer effect was developed and the SELPSTA code was also formulated. This work describes the experiment for the verification of the long-term SWR analysis model, and it also provides the model verification results to investigate the feasibility of the physical model and the numerical method implemented in the SELPSTA code