b'Power Distribution | Engineer InnovationOverall the goal of the design is toseconds. The goal of this is to keep the ensure that, should a large leak eventpressure on the side of the steam occur, the sodium in the shell side andgenerator higher than the pressure on the feed water in the tube side canthe shell side preventing sodium flow both be evacuated separately as quicklyinto the generator. To aide this process, as possible. To analyze the system innitrogen is injected at a pressure of Simcenter Flomaster, the water andtwenty bar until all of the fluid on the sodium flow distribution systems weresteam generator side is vented. modeled in the software while the steam generator was modeledFrom the analysis, it was determined separately. As the simulation was run,that sodium in the shell side of the the water system model wassteam generator and in the responsible for calculating: intermediate heat transport system was completely vented within fifty secondsWater leak mass flow rate andand feed water in the tube side of the temperature, steam generator was completely ventedGas leak mass flow rate andwithin two and a half seconds. It was temperature, and also shown that the pressure on theConcentration of gases. tube side of the steam generator was always higher than the pressure on the Meanwhile the sodium system modelshell side of the steam generator. The Figure 2. Simcenter Flomaster model of thewas responsible for calculating theuse of Simcenter Flomaster to complete sodium region of the SWRPRS and IHTS pressure of the sodium side shell. Thesethese simulations mean KAERI can use values were then dynamically shared tothe result as the basis for additional spread through the IHTS. For thisbalance the systems performance.design considerations for their reason it is critical to incorporate a Prototype Generation IV sodium-cooled well-designed rupture disk and With the different system modelsfast reactor. nsodium-water pressure relief systemconstructed, it was possible to look at (SWRPRS) to mitigate any large size leaktwo different line sizes of four and events. For this reason KAERI has usedeight inches. Simcenter Flomaster software to run a performance analysis of theirTo look at the time required to SWRPRS design. They were able todischarge the system the same accurately carry out transientprocedure was followed for both line simulations to evaluate dynamicsizes. Once the event is trigger the behavior of the fluids inside the steamwater supply pump starts immediately. generator being vented into a sodiumIt is assumed that the time required to or water dump tank in the event ofstart and stop the pump along with the broken stream generator tubes.time to open and close the valve is five Mass of Feed Water in the Tubes of the Steam Generator Mass of Feed Water in the Tubes of the Water Dump Tank3000 200018002500 16002000 14001200Mass [kg] Mass [kg] Mass [kg]1500 10008001000 600Case 1 Case 1Case 2 400 Case 25002000 01020304050600 0102030405060 Time [s] Time [s]Figure 3. Feed water mass in the tubes of the steam generator and the water dump tank during shut-down51'