Creep fatigue test of thermal stress mitigation structure model (2) under thermal transient loadings; Vo1.1 Design and fabrication of the model

not registered; not registered; not registered; Kasahara, Naoto; not registered; not registered; Imazu, Akira

Thermal transient strength tests of structure models are carried out to develop the design method of the fast breeder reactor components under thermal loadings. The fifth testing model for Thermal Transient, Test Facility for Structures (TTS), "Thermal stress mitigation structure model (2)", have been designed and fabricated. The purpose of this model is to get the thermal transient strength data for the typical shape of FBR components and to confirm the function of specific structures under thermal loading. This testing model is a vertical type cylindrical vessel supported by a skirt. It has seven testing portion for failure test, such as two types of nozzle, a Y-junction, two types of skirt and a plate to shell junction. And it has three testing portion for confirmation of function, such as a thermal insulator, a flow straightener and tube to perforated plate weldments. In designing the model, thermo-hydraulic analysis, heat transfer analysis, thermal Stress analysis were performed. Testing portions were evaluated using the design guide for TTS exclusive use. Material and welding method are basically comparable to the prototype reactor internals.