An SBLOCA test on the SIS line break with the VISTA-ITL facility and its simulation with the MARS-KS code

A thermal-hydraulic integral effect test facility, VISTA-ITL, for the SMART design has been constructed by the Korea Atomic Energy Research Institute (KAERI). Three SBLOCA tests were successfully performed using the VISTA-ITL facility. The breaks are guillotine breaks and their locations are on the SIS line (nozzle part of the RCP discharge), on the suction line of the SCS (nozzle part of the RCP suction), and the pressurizer safety valve (safety valve line connected to the pressurizer top). In this study, the SIS line-break SBLOCA test of SB-SIS-07 using VISTA-ITL has been discussed in detail. Also, a post-test simulation on the SBLOCA test (SB-SIS-07) has been performed with the MARS-KS code to assess its simulation capability for the SBLOCA scenario of the SMART design. The SBLOCA scenario in the SMART design was well reproduced using the VISTA-ITL facility, and the measured thermal-hydraulic data were properly simulated with the MARS-KS code. The present analysis results on SBLOCA can provide a good understanding on the thermal-hydraulic characteristics of the SBLOCA behavior of the SMART design. (author)