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Thermal-Structural Coupling Analysis and Safety Assessment Design of i-SMR Spiral Heat Transfer Tubes based on Finite Element Method
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DOI：10.3795/KSME-A.2026.50.3.179.png)
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Abstract
En 中文
This study develops a thermal-structural coupled safety evaluation system for a novel innovative small modular reactor (i-SMR) based on finite element analysis. The proposed system integrates parametric modeling with an automated analysis workflow, effectively addressing the issues of repetitive modeling and low computational efficiency during the early design stage. A three-dimensional parametric finite element model of the helical heat-transfer tube in a once-through steam generator (OTSG) is established, and multiphysics thermal-structural coupling analyses are conducted over a temperature range of 210 similar to 321 degrees C. The results demonstrate that the heat-transfer tube exhibits satisfactory structural integrity, with the maximum thermal stress remaining below the allowable limit of Inconel 690, and the deformation satisfying design criteria. Stress linearization analysis further confirms that the structural safety margins exceed code-specified limits. The proposed system enables efficient evaluation of the effects of geometric and material parameters on structural performance, providing reliable technical support for multi-objective optimization of heat-transfer tube design and significantly improving the development efficiency of i-SMR engineering applications.
Keywords:
Finite Element Analysis
Innovative Small Modular Reactor
Once-Through Steam Generator
Heat Transfer Tube
Journal
T
IF:
0.2
Papers:
87
Citations:
308
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Cited Papers