Zr-Sn-Nb包壳管腐蚀吸氢中氢浓度测算的截面金相法
A Novel Cross-sectional Metallography Method for Determining Hydrogen Absorption Concentration and Hydrogen Absorption Amount of Zr-Sn-Nb Alloy Cladding Caused by High Temperature Water Corrosion
马雁 1蓝宇宁 1陈嘉威1
作者信息
- 1. 华北电力大学核科学与工程学院 北京 102206
- 折叠
摘要
利用RH600/LECO定氢仪对Zr-Sn-Nb包壳管多个样品获取氢浓度的数据,结合样品横截面显微图像测量获取的氢化物面积分数的数据,推导出一种用于测算Zr-Sn-Nb包壳管中氢浓度的计算公式,即"截面金相法".通过用文献中大量已知数据对该测算方法进行验证,结果表明,运用"截面金相法"测算出的氢浓度值准确度较高,与标称氢浓度值之间的误差＜6％.
Abstract
Corrosion and hydrogen absorption of zirconium alloy cladding for PWRs is one of the main causes for cladding embrittlement and breakage failure.Therefore,rapid and accurate determina-tion of hydrogen concentrations in zirconium alloys is of great importance to assess the integrity of the cladding.In this paper,we used the RH600/LECO hydrogen analyzer to measure the hydrogen concen-tration data for several samples of Zr-Sn-Nb cladding,meanwhile the corresponding data of hydrogenat-ed area fraction were acquired by cross-sectional microscopic image measurements.On the bases of the two group of data,a formula was proposed to figure out the distribution of hydrogen concentrations in Zr-Sn-Nb cladding,namely the so called cross-sectional metallography method.This method was validated by using a large amount of known data from the existing literatures.The results showed that the hydro-gen concentration values measured by the cross-sectional metallography method were highly accurate,and the error between the hydrogen concentration value and the nominal value is less than 6％.
关键词
Zr-Sn-Nb/包壳管/腐蚀吸氢/截面金相法Key words
Zr-Sn-Nb/cladding/hydrogen corrosion/transverse metallographical method引用本文复制引用
基金项目
国家自然科学基金(12275083)
国家科技重大专项(2019ZX06004009)
出版年
2024
NETL
NSTL
维普
万方数据