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首页> 外文期刊>Journal of nuclear science and technology >Benchmarking Studies of Probabilistic Fracture Mechanics Analysis Code, PROFMAG-II, for Assessing Pressurized Thermal Shock Events of Reactor Pressure Vessel Integrity Issues
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Benchmarking Studies of Probabilistic Fracture Mechanics Analysis Code, PROFMAG-II, for Assessing Pressurized Thermal Shock Events of Reactor Pressure Vessel Integrity Issues

机译：概率断裂力学分析代码PROFMAG-II的基准研究，用于评估反应堆压力容器完整性问题的加压热冲击事件

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The probabilistic fracture mechanics analysis code, PROFMAC-II, was developed and benchmarked for postulated pressurized thermal shock (PTS) events of pressurized water reactor pressure vessel integrity issues by participating the PTS benchmarking activities organized and managed jointly by U.S. Nuclear Regulatory Commission (USNRC) and Electric Power Research Institute (EPRI). Three different sets of benchmarking problems were assigned to participants for the studies in sequence. The initial and second sets were preparatory to the third set. Results from the sequential benchmarking activities were that for axial flaw analyses probabilities of crack initiation were identical to those for vessel failure and the scatter of probabilities among four participating codes was small, while for circumferential flaw analyses probabilities varied widely. It was eventually verified that the same probabilities were achievable by unifying procedures for simulating material properties. Performance of the PROFMAC-II code was excellent in terms of consistency and adequacy among the four codes and the eight organizations which took part in the studies. Several issues relevant to analysis techniques and input variables were pointed out for further improvement of the codes.
机译：通过参与由美国核监管委员会（USNRC）共同组织和管理的PTS基准测试活动，开发了概率断裂力学分析代码PROFMAC-II并对其进行了基准化，以应对压水堆压力容器完整性问题的假定的加压热冲击（PTS）事件和电力研究所（EPRI）。依次向参与者分配了三组不同的基准测试问题。第一和第二套是第三套的准备。连续基准测试活动的结果是，轴向缺陷分析的裂纹萌生概率与血管破裂的概率相同，并且四个参与代码之间的概率散布很小，而周向缺陷分析的概率差异很大。最终通过统一模拟材料特性的程序验证了相同的概率是可以实现的。在参加研究的四个代码和八个组织之间，在一致性和充分性方面，PROFMAC-II代码的性能非常出色。指出了与分析技术和输入变量有关的几个问题，以进一步改进代码。

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