首页|压水堆核电厂热态功能试验水化学与设备材料腐蚀关系的研究进展

压水堆核电厂热态功能试验水化学与设备材料腐蚀关系的研究进展

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热态功能试验(HFT)是新建核电厂装载燃料前的试运行阶段,目的是验证压水堆(PWR)核电厂在冷态、正常运行和停堆的整个温度和压力范围内相关设备和系统的功能响应,以确保其能按设计要求正常运行.HFT水化学可以在PWR一回路关键设备表面形成一层稳定、具有保护性的预氧化膜,有效降低设备材料在后续长期正常运行过程中的腐蚀速率、金属离子的释放速率及放射性核素在腐蚀产物膜中的掺杂,进而缓解核电厂的腐蚀,降低停堆辐射剂量率.本文综述了目前PWR核电厂应用的HFT水化学与优化HFT水化学参数的研究评价方法,分析了H3BO3、LiOH、pHT、溶解氢及注Zn等HFT水化学因素对关键设备材料腐蚀行为的影响,指出了目前HFT水化学研究中的不足和进一步的研究方向.
Review on Relationship Between Hot Functional Test Water Chemistry and Corrosion Behavior of Related Component Materials in Pressurized Water Reactor Nuclear Power Plants
Hot functional test(HFT)involves a number of pre-operational exercises without fuel per-formed to confirm the operability of newly constructed nuclear power plants in the conditions expected during both normal and off-normal operations of a pressurized water reactor(PWR).HFT water chemistry provides an opportunity to produce a stable and protective oxide scale on the key equipment in the prima-ry coolant of PWR which can greatly reduce the corrosion rate of the substrate,the release of the metal ions and the incorporation of activated corrosion products during the subsequently long-term normal oper-ations,and furthermore,relief the dose rate and decrease the corrosion rates of the related component materials for the nuclear power plants.HFT water chemistry adopted in PWR nuclear power plants and the evaluation methods for the HFT water chemistry optimization are reviewed in the present work.The effect of boric acid,lithium hydroxide,pHT,dissolved hydrogen and Zn injection on the corrosion behavior of key components materials are analyzed.Challenges and trends for HFT water chemistry optimization in the future are also addressed.

PWR nuclear power plantshot functional testwater chemistrydose ratecorrosion rate

彭立园、吴欣强、张兹瑜、谭季波

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中国科学院金属研究所 中国科学院核用材料与安全评价重点实验室 沈阳 110016

中国科学技术大学材料科学与工程学院 合肥 230026

PWR核电厂 热态功能试验 水化学 辐射剂量率 腐蚀速率

国家自然科学基金

52171085

2024

中国腐蚀与防护学报
中国腐蚀与防护学会 中国科学院金属研究所

中国腐蚀与防护学报

CSTPCD北大核心
影响因子:0.819
ISSN:1005-4537
年,卷(期):2024.44(3)