热力发电2025，Vol.54Issue(10)：126-132,7.DOI:10.19666/j.rlfd.202412260
溶解氧对蒸汽发生器节流孔腐蚀产物沉积规律的影响
Effect of dissolved oxygen on deposition rules of corrosion products in orifice of steam generators
摘要
Abstract
The deposition of corrosion products in orifice of the steam generator of high temperature gas cooled reactor(HTGR)in nuclear power units threats to safe operation of the unit seriously.To effectively inhibit the deposition of corrosion products in the orifice,the influence of dissolved oxygen in water on the orifice deposition rate was studied under the simulated water condition in the secondary loop of the HTGR.Moreover,the variation law of ZETA potential with dissolved oxygen in iron solution was also studied.It is found that the deposition rate of corrosion products in the orifice area is extremely sensitive to the dissolved oxygen,it decreases with the increase of dissolved oxygen concentration in water.Secondly,over high pH value is not conducive to the inhibition of orifice deposition,which is mainly due to the effect of dissolved oxygen and pH value on the ZETA potential.The wall current electrokinetic effect plays an important role in the orifice deposition,and increasing the concentration of dissolved oxygen in feed water is an effective method to restrain the orifice deposition and clogging in the steam generator of HTGR.关键词
高温气冷堆/节流孔/沉积速率/溶解氧/电动效应Key words
HTGR/orifice/deposition rate/dissolved oxygen/electrokinetic effect引用本文复制引用
张贵泉,王威,姚建涛,龙国军,吴志军,贾晶晶..溶解氧对蒸汽发生器节流孔腐蚀产物沉积规律的影响[J].热力发电,2025,54(10):126-132,7.基金项目
中国华能集团有限公司总部科技项目(HNKJ22-H09)Science and Technology Project of China Huaneng Group Co.,Ltd.(HNKJ22-H09) （HNKJ22-H09）
