The objective of COSINE (COre and System INtegrated Engine for design and analysis) project is to develop a software platform which is used for nuclear power plant design and safety analysis. The system code (SYST) is a part of COSINE code. In this paper, the mathematic model of accumulator is established. The model is based on following assumptions: nitrogen above liquid level in accumulator is represented in idea gas equation, water is modeled as an isothermal system. The model for liquid flow include inertia, wall friction, form loss, and gravity effects. Several cases were calculated under different conditions, and the results were compared with RELAP5. It shows that COSINE results agree well with RELAP5.

Volume Subject Area:
Thermal Hydraulics
Topics:
Secondary cells, Computer software, Cores (Molding materials), Design, Engines, Flow (Dynamics), Friction, Gravity (Force), Inertia (Mechanics), Nitrogen, Nuclear design, Safety, Water
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