Effect of dissolved oxygen on deposition rules of corrosion products in orifice of steam generators

张贵泉; 王威; 姚建涛; 龙国军; 吴志军; 贾晶晶

doi:10.19666/j.rlfd.202412260

English

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Effect of dissolved oxygen on deposition rules of corrosion products in orifice of steam generators

Thermal Power Generation Vol. 54, Issue 10, Pages: 126-132(2025)

更新时间：2026-08-11

- Effect of dissolved oxygen on deposition rules of corrosion products in orifice of steam generators
- 作者机构：
  
  1. 西安热工研究院有限公司
  2. 华能核能技术研究院有限公司
  3. 华能山东石岛湾核电有限公司
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202412260
  CLC： TL353.13;TM623.94
- Published：2025
- 稿件说明：
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[1]张贵泉,王威,姚建涛,等.溶解氧对蒸汽发生器节流孔腐蚀产物沉积规律的影响[J],2025,54(10):126-132.
[1]张贵泉,王威,姚建涛,等.溶解氧对蒸汽发生器节流孔腐蚀产物沉积规律的影响[J],2025,54(10):126-132. DOI： 10.19666/j.rlfd.202412260.

DOI：10.19666/j.rlfd.202412260.

摘要

高温气冷堆核电机组蒸汽发生器节流孔腐蚀产物沉积严重会威胁机组安全运行，为此，在模拟高温气冷堆二回路水工况条件下，研究了水中溶解氧对节流孔沉积速率的影响，以及水中胶体铁ZETA电位随溶解氧的变化规律。实验结果表明：节流孔区域腐蚀产物的沉积速率对溶解氧非常敏感，其随水中溶解氧质量浓度的增加而降低；其次，过高的p H值不利于节流孔沉积现象的抑制，这主要归因于溶解氧和p H值对胶体铁ZETA电位的影响；壁电流电动效应在节流孔沉积中发挥重要作用，提高给水中溶解氧质量浓度是抑制高温气冷堆蒸汽发生器节流孔沉积和堵塞的有效方法。

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.

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