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首页> 外文会议>12th International Conference on Environmental Degradation of Materials in Nuclear Power Systems: Water Reactors 2005 vol.2 >BWR SCC Mitigation Experiences with Hydrogen Water Chemistry
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BWR SCC Mitigation Experiences with Hydrogen Water Chemistry

机译：氢水化学对BWR SCC的缓解经验

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It is well accepted that once the electrochemical corrosion potential (ECP) of structural materials used in BWRs such as sensitized stainless steel, Alloy 182 and Alloy 600 are lowered to values <-230 mV(SHE) with hydrogen water chemistry (HWC) or NobleChem~TM/low HWC, intergranular stress corrosion cracking of materials can potentially be mitigated. This fact has been confirmed by numerous laboratory tests conducted by many investigators worldwide. However, the actual BWR fleet operational data confirming the benefits of hydrogen water chemistry (HWC) are limited primarily due to the limited number of ultrasonic tests (UT) performed in operating plants, infrequent UT data available before and after HWC, uncertainties associated with UT examinations, and the time and cost involved in UT examinations of plant internal components such as the recirculation piping and the core shroud. This paper is intended to summarize some of the available crack growth rate data from operating plants that used crack growth monitors in a variety of in-vessel locations exposed to real plant water chemistry conditions, and some of the actual plant UT data collected before and after employing HWC. The paper will also summarize a few post-HWC and post-NobleChem~TM/low HWC UT data, and address the attempts that are currently in progress to collect more UT data from operating BWRs.
机译：公认的是，一旦用氢水化学法（HWC）或NobleChem将BWR中使用的结构材料（如敏化不锈钢，182和600合金）的电化学腐蚀电位（ECP）降低至<-230 mV（SHE）值〜TM /低HWC，材料的晶间应力腐蚀开裂可能会得到缓解。全球许多研究人员进行的大量实验室测试已证实了这一事实。但是，确认氢水化学（HWC）好处的实际BWR船队运营数据主要受到限制，这是因为在运营工厂中执行的超声波测试（UT）数量有限，HWC之前和之后可用的UT数据很少，与UT相关的不确定性检查，以及UT检查工厂内部组件（例如再循环管道和核心导流罩）的时间和成本。本文旨在总结一些运营工厂的可用裂缝生长速率数据，这些工厂在暴露于实际植物水化学条件的各种容器位置使用了裂缝生长监控器，以及在此之前和之后收集的一些实际工厂UT数据雇用HWC。本文还将总结一些HWC后和NobleChemTM /低HWC后的UT数据，并讨论当前正在进行的从运行中的BWR收集更多UT数据的尝试。

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