Probabilistic fracture mechanics analysis of reactor pressure vessel with underclad and through-clad cracks under pressurised thermal shock transient

Q4 Energy

International Journal of Nuclear Energy Science and Technology Pub Date : 2018-06-26 DOI:10.1504/IJNEST.2018.10013862

K. Chen, K. Ting, A. Nguyen, Li Wang, Y. Li, T. Kuo

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引用次数: 1

Abstract

Semi-elliptical underclad cracks resulting from the fabrication process of a reactor pressure vessel (RPV) were able to be detected by non-destructive testing method. Meanwhile, after long-term operation under severe conditions, such as high temperature, high pressure, and irradiation, the RPV becomes brittle and susceptible to damage, especially when subjected to pressurised thermal shocks (PTS). Therefore, the probabilistic fracture mechanics (PFM) analysis of RPV with the crack should be applied to evaluate the operation safety. To the best of the authors' knowledge, few studies or computer codes have applied PFM analysis for such cracks. Therefore, this study conducts PFM analysis for cracks by modifying the calculation procedure of FAVOR 12.1 computer code. The results show that during the lifetime of a nuclear power plant, such cracks will not threaten the RPV's safety. Additionally, three methods were proposed to improve FAVOR 12.1's ability to perform PFM analysis for axial through-clad cracking.

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带下包层和贯穿包层裂纹的反应堆压力容器在压力热冲击瞬态下的概率断裂力学分析

采用无损检测方法对反应堆压力容器制造过程中产生的半椭圆包层裂纹进行了检测。同时，在高温、高压和辐照等恶劣条件下长期运行后，RPV会变脆，容易损坏，尤其是在高压热冲击(PTS)下。因此，应采用含裂纹RPV的概率断裂力学(PFM)分析来评价其运行安全性。据作者所知，很少有研究或计算机代码应用PFM分析这种裂缝。因此，本研究通过修改FAVOR 12.1计算机代码的计算程序，对裂缝进行PFM分析。结果表明，在核电站的全寿期内，这种裂缝不会对反应堆的安全造成威胁。此外，提出了三种方法来提高FAVOR 12.1对轴向贯通包层裂纹进行PFM分析的能力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Nuclear Energy Science and Technology Energy-Nuclear Energy and Engineering

CiteScore

0.80

自引率

0.00%

发文量

期刊介绍： Today, nuclear reactors generate nearly one quarter of the electricity in nations representing two thirds of humanity, and other nuclear applications are integral to many aspects of the world economy. Nuclear fission remains an important option for meeting energy requirements and maintaining a balanced worldwide energy policy; with major countries expanding nuclear energy"s role and new countries poised to introduce it, the key issue is not whether the use of nuclear technology will grow worldwide, even if public opinion concerning safety, the economics of nuclear power, and waste disposal issues adversely affect the general acceptance of nuclear power, but whether it will grow fast enough to make a decisive contribution to the global imperative of sustainable development.