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首页> 外文会议>ASME(American Society of Mechanical Engineers) Pressure Vessels and Piping Conference vol.3: Design and Analysis; 20050717-21; Denver,CO(US) >ASSESSMENT OF LIMIT LOADS FOR CIRCUMFERENTIAL CRACKS IN STEAM GENERATOR TUBE CONSIDERING CONSTRAINING EFFECT OF TUBE SUPPORT
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ASSESSMENT OF LIMIT LOADS FOR CIRCUMFERENTIAL CRACKS IN STEAM GENERATOR TUBE CONSIDERING CONSTRAINING EFFECT OF TUBE SUPPORT

机译：考虑管约束作用的蒸汽发生器管环裂纹极限载荷的评估

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摘要

The steam generator in a nuclear power plant is a large heat exchanger that uses heat from reactor to generate steam to drive the turbine generators. Rupture of a steam generator tube can result in release of fission products to environment. Therefore, an accurate integrity assessment of the steam generator tubes with cracks is of great importance for maintaining safety of a nuclear power plant. The steam generator tubes are supported at periodic intervals by support plates and rotations of the tubes are constrained. Although it was reported that the limit load for a circumferential crack was significantly affected by boundary condition of the tube, existing limit load solutions do not include the constraining effect of tube supports. This paper provides detailed limit load solutions for circumferential cracks in steam generator tubes considering the actual boundary conditions to simulate the constraining effect of the tube supports. Such solutions are developed based on three dimensional (3D) finite element analyses. The resulting limit load solutions are given in a polynomial form, and thus can be simply used in practical integrity assessment of the steam generator tubes.
机译：核电站中的蒸汽发生器是一个大型热交换器，利用来自反应堆的热量产生蒸汽来驱动涡轮发电机。蒸汽发生器管破裂会导致裂变产物释放到环境中。因此，对具有裂纹的蒸汽发生器管的准确完整性评估对于维持核电站的安全非常重要。蒸汽发生器管由支撑板以周期性间隔支撑，并且限制了管的旋转。尽管据报道，圆周裂纹的极限载荷受管边界条件的影响很大，但现有的极限载荷解决方案并不包括管支架的约束作用。本文提供了考虑实际边界条件以模拟管支架约束效果的蒸汽发生器管子圆周裂纹的详细极限载荷解决方案。此类解决方案是基于三维（3D）有限元分析开发的。最终的极限载荷解以多项式形式给出，因此可以简单地用于蒸汽发生器管的实际完整性评估中。

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