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首页> 外文会议>2002 ASME Pressure Vessels and Piping Conference, Aug 5-9, 2002, Vancouver, British Columbia, Canada >HIGH-CYCLE ANALYTICAL THERMAL FATIGUE TESTS ON PIPE STRUCTURES
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HIGH-CYCLE ANALYTICAL THERMAL FATIGUE TESTS ON PIPE STRUCTURES

机译：管道结构的高周波分析热疲劳试验

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摘要

In 1998, a leak occurred in the main mixing zone of the residual heat removal systems (RHR) of the EDF CIVAUX nuclear plant unit 1. The crack is attributed to high-cycle thermal fatigue due to the fluid thermal turbulences. An research and development (R&D) program is now being conducted at EDF to understand the incident and to assess the risks of cracks in other mixing zones. This program includes thermal-hydraulic tests on mock-ups and their numerical interpretation, material testing in high-cycle fatigue, structure tests on mock-ups submitted to high-cycle thermal stresses and their interpretations, and developments in non destructive evaluations in the presence of crazing zones (thermal striping). After a brief presentation of the R&D program, the paper presents a new high-cycle thermal fatigue bench test, named INTHERPOL, for pipe structures. The thermal cycles consist of periodic controlled cold shocks by water sprays and hot shocks by infrared radiations on the inner surface of part of the structure. The structure under test, the water spray devices and infrared modules are inserted into a tank to allow constant control of the environment. The types of pipe structures tested include plain or welded structures and various industrial surface finishes. The first tests results and their numerical interpretations are presented.
机译：1998年，EDF CIVAUX核电厂1号机组的余热排除系统（RHR）的主要混合区发生泄漏。该裂纹归因于流体热湍流引起的高循环热疲劳。目前，法国电力公司（EDF）正在执行一项研发（R＆D）计划，以了解该事件并评估其他混合区出现裂缝的风险。该程序包括对模型的热工液压测试及其数值解释，在高周疲劳中的材料测试，经受高周热应力的模型的结构测试及其解释，以及在无损评估中的发展裂纹区域（热剥离）。在简短介绍了R＆D程序之后，本文提出了一种新的用于管道结构的高周期热疲劳试验台，名为INTHERPOL。热循环包括周期性喷水控制的冷冲击和结构部分内表面的红外辐射的热冲击。将被测结构，喷水装置和红外模块插入水箱中，以实现对环境的持续控制。所测试的管道结构类型包括普通或焊接结构以及各种工业表面处理。介绍了第一个测试结果及其数值解释。

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