• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>ASME Pressure Vessels and Piping conference >NUMERICAL EVALUATION OF ENVIRONMENTALLY ASSISTED FATIGUE (EAF) IN CONSIDERATION OF RECENT UPDATES OF THE FORMULAS AND HOLD TIME EFFECTS
【24h】

NUMERICAL EVALUATION OF ENVIRONMENTALLY ASSISTED FATIGUE (EAF) IN CONSIDERATION OF RECENT UPDATES OF THE FORMULAS AND HOLD TIME EFFECTS

机译：考虑配方的最新更新和保持时间影响的环境辅助疲劳（EAF）的数值评估

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Environmentally Assisted Fatigue (EAF) has been focus of various research activities and has been addressed in nuclear Codes and Standards like German safety standard KTA 3201.2 , 3211.2 or ASME CC N-792 for example. Based on experimental investigation under laboratory conditions a numerical correction factor F_(en), was proposed in NUREG CR-6909 in 2007 after precursors in the Japanese JSME code . In 2012 the EPRI Technical Report "Guidelines for Addressing Environmental Effects in Fatigue Usage Calculations" introduced some practical guidelines for the application of the EAF to real plant components based on the set of formulas from 2007. Since this report the set of formulas have been adapted several times (e.g. in ANL-LWRS 47-2011 ) while the current revision of NUREG/CR-6909 in 2014 describes the current state of the art. At E.ON Kernkraft GmbH a goal-oriented and engineering based research program called NuMEA (Numerical Methods to take Environmentally Assisted Fatigue into Account) has been established, focusing on recommendations of the EPRI guideline in the context of application to real plant components and available temperature measurement data. First main focus of the R&D activity is to calculate the EPRI sample for verifying developed procedures and taking different procedures for determining the sign to be assigned to the relevant stress intensity into account. The documentation of the procedures applied within the EPRI guideline is not comprehensive enough for real-plant evaluation application. Thus, additional definitions and procedures have been developed to ensure practical application of the procedures being developed. Additionally, updated formulas being recently introduced in the context of the NUREG/CR-6909 Rev. 1 have been implemented. Second topic of the activities is to develop a procedure to take hold-time effects into account numerically based on existing experimental data. Motivated by the fact that the introduction of a potentially beneficial effect of hold times is foreseen in the framework of piping design of the German KTA safety standards, the existing engineering approach (PVP2014-2819 ) is appended to fatigue calculation of NPP components. This paper presents the results and the highlights of the E.ON R&D project NuMEA.
机译：环境辅助疲劳（EAF）一直是各种研究活动的重点，并且已经在核规范和标准（例如德国安全标准KTA 3201.2，3211.2或ASME CC N-792）中得到了解决。基于实验室条件下的实验研究，在日本JSME规范的前身之后，于2007年在NUREG CR-6909中提出了数值校正因子F_（en）。 2012年，EPRI技术报告“解决疲劳使用率计算中的环境影响的准则”基于2007年的一组公式引入了一些将EAF应用于实际植物成分的实用准则。自该报告以来，该公式已被修改数次（例如，在ANL-LWRS 47-2011中），而2014年的NUREG / CR-6909的当前版本描述了当前的技术水平。在E.ON Kernkraft GmbH，已建立了一个名为NuMEA（考虑环境辅助疲劳的数值方法）的面向目标且基于工程的研究计划，重点是将EPRI指南的建议应用于实际的工厂组件并提供参考。温度测量数据。研发活动的首要重点是计算EPRI样本，以验证已开发的程序并考虑用于确定要分配给相关应力强度的符号的不同程序。 EPRI指南中所应用程序的文档对于实际工厂评估应用而言还不够全面。因此，已经开发了附加的定义和程序以确保所开发程序的实际应用。另外，已经实现了最近在NUREG / CR-6909 Rev. 1上下文中引入的更新公式。活动的第二个主题是根据现有实验数据开发一种程序，以数字方式考虑保持时间效应。出于在德国KTA安全标准的管道设计框架中预见到可能引入保持时间的潜在有益效果这一事实的推动，将现有的工程方法（PVP2014-2819）附加到了NPP组件的疲劳计算中。本文介绍了E.ON研发项目NuMEA的结果和重点。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号