• 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 >NUCLEAR POWER PLANT FIRES AND EXPLOSIONS: PART IV - WATER HAMMER EXPLOSION MECHANISMS
【24h】

NUCLEAR POWER PLANT FIRES AND EXPLOSIONS: PART IV - WATER HAMMER EXPLOSION MECHANISMS

机译：核电站的火和爆炸：第四部分-水锤爆炸机理

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

摘要

Water hammers, or fluid transients, compress flammable gasses to their autognition temperatures in piping systems to cause fires or explosions. While this statement may be true for many industrial systems, the focus of this research are reactor coolant water systems (RCW) in nuclear power plants, which generate flammable gasses during normal operations and during accident conditions, such as loss of coolant accidents (LOCA's) or reactor meltdowns. When combustion occurs, the gas will either burn (deflagrate) or explode, depending on the system geometry and the quantity of the flammable gas and oxygen. If there is sufficient oxygen inside the pipe during the compression process, an explosion can ignite immediately. If there is insufficient oxygen to initiate combustion inside the pipe, the flammable gas can only ignite if released to air, an oxygen rich environment. This presentation considers the fundamentals of gas compression and causes of ignition in nuclear reactor systems. In addition to these ignition mechanisms, specific applications are briefly considered. Those applications include a hydrogen fire following the Three Mile Island meltdown, hydrogen explosions following Fukushima Daiichi explosions, and on-going fires and explosions in U.S nuclear power plants. Novel conclusions are presented here as follows. 1. A hydrogen fire was ignited by water hammer at Three Mile Island. 2. Hydrogen explosions were ignited by water hammer at Fukushima Daiichi. 3. Piping damages in U.S. commercial nuclear reactor systems have occurred since reactors were first built. These damages were not caused by water hammer alone, but were caused by water hammer compression of flammable hydrogen and resultant deflagration or detonation inside of the piping.
机译：水锤或流体瞬变将可燃气体压缩到管道系统中的自燃温度，从而引起火灾或爆炸。尽管此声明对于许多工业系统可能是正确的，但本研究的重点是核电站中的反应堆冷却剂水系统（RCW），该系统在正常运行期间和事故条件下（例如，冷却剂事故（LOCA）损失）会产生可燃气体。或反应堆崩溃。发生燃烧时，气体会燃烧（爆燃）或爆炸，这取决于系统的几何形状以及可燃气体和氧气的量。如果在压缩过程中管道内有足够的氧气，则爆炸会立即点燃。如果没有足够的氧气来引发管道内部的燃烧，则易燃气体只有释放到空气中即富氧环境中才能点燃。本演示文稿考虑了核反应堆系统中气体压缩的基本原理和着火的原因。除了这些点火机制之外，还简要考虑了特定的应用。这些应用包括三英里岛（Triple Mile Island）崩溃后的氢火焰，福岛第一核电站爆炸后的氢爆炸以及美国核电厂的持续大火和爆炸。新颖的结论在这里提出如下。 1.三英里岛上的水锤点燃了氢气。 2.福岛第一核电站的水锤引发了氢气爆炸。 3.自从首次建造反应堆以来，美国商业核反应堆系统就发生了管道损坏。这些损坏不是仅由水锤引起的，而是由水锤压缩易燃氢气并导致管道内部爆燃或爆炸引起的。

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