Assessment of environmental fatigue in nuclear power plants: A comparative analysis of the effects of plasticity correction

被引：1

作者：

Han, Tae-Song ^{[1
]}

Kim, Hee-Jin ^{[1
]}

Huh, Nam-Su ^{[1
]}

Lee, Hyeong-Yeon ^{[2
]}

Jang, Changheui ^{[3
]}

机构：

[1] Seoul Natl Univ Sci & Technol, Dept Mech Syst Design Engn, Seoul, South Korea

[2] Korea Atom Energy Res Inst, Daejeon, South Korea

[3] Korea Adv Inst Sci & Technol, Dept Nucl & Quantum Engn, Daejeon, South Korea

来源：

NUCLEAR ENGINEERING AND TECHNOLOGY | 2024年 / 56卷 / 09期

基金：

新加坡国家研究基金会;

关键词：

Environmental fatigue; Simplified elastic-plastic correction factor; Neuber method; Glinka method; STRESS;

D O I：

10.1016/j.net.2024.04.025

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

In accordance with Regulatory Guide 1.207, Rev.1, fatigue assessments must be conducted considering the influence of primary coolant environment in nuclear reactors. Environmental fatigue, resulting from corrosion in the primary coolant, is evaluated in air fatigue life assessments through the application of an environmental fatigue correction factor. This environmental fatigue correction factor depends on sulfur content, operating temperature, dissolved oxygen, and strain rate. It remains constant for sulfur content, operating temperature, and dissolved oxygen, while strain rate introduces potential errors based on the analysis method. The current fatigue evaluation procedure for air, following ASME B&PV Code Sec.III, NB-3200, employs elastic analysis with a simplified elastic-plastic correction factor(Ke). However, Ke factor is considered excessively conservative, prompting less conservative alternatives proposed by JSME, RCC-M, ASME Code Case N-779. This study applied both ASME Ke and JSME Ke for fatigue evaluations considering environmental effects. Additionally, fatigue assessments accounting for elastic-plastic effects were conducted using Neuber and Glinka methods, compared with actual experiments. The analysis systematically examined changes in fatigue life and the environmental fatigue correction factor due to plastic effects in environmental fatigue evaluations.

引用

页码：3764 / 3774

页数：11

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