• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>ASME Power Conference 2005: Includes Papers from the 2005 International Conference on Power Engineering(ICOPE) pt.A >PERFORMANCE CONSIDERATIONS IN REPLACEMENT OF LOW-PRESSURE TURBINE ROTORS FOR NUCLEAR POWER PLANTS -A CASE STUDY
【24h】

PERFORMANCE CONSIDERATIONS IN REPLACEMENT OF LOW-PRESSURE TURBINE ROTORS FOR NUCLEAR POWER PLANTS -A CASE STUDY

机译：核动力厂低压涡轮转子的性能考量-案例研究

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In recent years, the nuclear power industry has witnessed profound changes in terms of renewal of operating licenses and power uprates. Renewal of operating licenses for an additional 20 years beyond the original licensed period of 40 years entails several considerations relating to aging management, performance, reliability, availability, and maintainability. Power uprates range from a low of up to 2% due to improved techniques in feedwater flow measurement to a high of up to 20% for extended power uprates. Since the limitations of power uprates are generally encountered in design of the turbine cycle, the impact upon the performance, reliability, availability and maintainability of the equipment and components in the turbine cycle may vary from low or moderate to significant. Several nuclear power plant owners have already replaced the low-pressure turbine rotors of their nuclear units with improved designs to mitigate blade failures and forced outages due to stress corrosion cracking, to reduce inspection intervals and maintenance, achieve higher output due to improved efficiency, etc. Others are either embarking upon or planning similar initiatives to confront aging, performance, availability, reliability and maintainability concerns stemming from renewal of operating licenses as well as the need to accommodate higher pressures and flows accompanying the proposed power uprates. Typically, the original low-pressure turbine designs utilizing built-up rotors with shrunk-on disks are being replaced with monoblock rotors with fully integral disks, couplings, blading and shrouds. The last stage blading is also longer resulting in a larger annulus area. Since these replacement programs involve significant expenditures, several factors need to be considered in order to ensure that the objectives of the rotor replacement programs are met. Using a case study, this paper examines the various considerations involved in replacing the low-pressure turbine rotors for a nuclear power plant. Design, performance and test considerations that need to be addressed before and after the low-pressure turbine rotors are replaced are discussed. The use of performance modeling tools in evaluating performance gains from low-pressure turbine rotor replacements is reviewed. Finally, the paper provides recommendations for ensuring that the objectives of a low-pressure turbine rotor replacement program are met.
机译：近年来，核电行业在续签营业执照和提高电费率方面发生了深刻的变化。在40年的原始许可期限之外，将经营许可续签20年需要进行一些与老化管理，性能，可靠性，可用性和可维护性有关的考虑。由于进水流量测量技术的改进，功率提升率的范围从低至2％，而扩展功率提升率的范围则高达20％。由于在涡轮机循环的设计中通常会遇到功率提升率的局限性，因此对涡轮机循环中的设备和组件的性能，可靠性，可用性和可维护性的影响可能从低或中等到显着变化。一些核电厂所有者已经用改进的设计替换了其核装置的低压涡轮机转子，以减轻由于应力腐蚀裂纹而导致的叶片故障和强迫停机，减少检查间隔和维护，由于效率提高而获得更高的输出等。其他公司则正在着手或计划采取类似的措施，以应对由于更新运营许可证以及适应提议的电源升级所需的更高压力和流量而引起的老化，性能，可用性，可靠性和可维护性问题。通常，原始的低压涡轮机设计是使用带有收缩盘的组合式转子的，而现在是由具有完整整体盘，联轴器，叶片和护罩的整体式转子代替。最后阶段的叶片也更长，导致更大的环面面积。由于这些更换计划涉及大量支出，因此需要考虑几个因素，以确保达到转子更换计划的目标。本文通过案例研究，考察了为核电站更换低压涡轮转子时涉及的各种考虑因素。讨论了在更换低压涡轮转子之前和之后需要解决的设计，性能和测试注意事项。评估了性能建模工具在评估低压涡轮机转子更换带来的性能提升中的使用。最后，本文提供了一些建议，以确保满足低压涡轮机转子更换程序的目标。

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