Mechanical strength analysis on heating tank section in the FASSIP-03 NT loop based on computer-aided simulation

Design of the Nanobubble Transparent Passive-03 System Simulation Facility (FASSIP-03 NT) loop has been going into production in 2021. The use of Nanobubbles as a fluid in the FASSIP-03 NT loop aims to increase the heat transfer capability of the working fluid. This is achieved from the natural circulation which can occur more easily. The components in the FASSIP-03 NT loop consist of a Heating Tank Section (HTS), Cooling Tank Section (CTS) equipped with a Helical Heat Exchanger, Pyrex Glass Tube and a piping system. The Heating Tank Section is one of the components in the FASSIP-03 NT loop, which functions to stimulate heat generation in the nuclear reactor core. The Heating Tank Section component has a higher risk of accidents compared to other components of the FASSIP-03 NT loop. Therefore, an analysis is required to determine the mechanical strength of the Heating Tank Section component design before to manufacturing and operation. Analyzes were performed using a computer-aided three-dimensional interactive application, known as drawing analytical software. The stages taken in analyzing the mechanical strength of the Heating Tank Section include; making a 3-dimensional model of the Heating Tank Section according to the design that has been obtained, giving a restraint to the model, applying loads in the form of pressure and temperature on the 3-dimensional model, and calculating mechanical strength distribution all over the model. These will yield the mechanical stress and translational displacement in the 3-dimensional model. The results of the analysis show that the mechanical stress that occurs in the body of the Heating Tank Section is 1.10 × 103 N/m2, which is much smaller than the yield strength of the SS 304 material, which is 1.73 × 108 N/m2. The translational displacement of 3.28 mm is very small when compared to the dimensions of the Heating Tank Section. s This is not significant deformation of the FASSIP-03 NT loop. Thus the Heating Tank Section is safe to be manufactured and operated to support research natural circulation at FASSIP-03 NT.