Experimental study on deposition law of corrosion products in throttle orifice of steam generator in high temperature gas cooled reactor

王威; 张贵泉; 吴志军; 贾晶晶; 龙国军; 姚建涛

doi:10.19666/j.rlfd.202502037

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Experimental study on deposition law of corrosion products in throttle orifice of steam generator in high temperature gas cooled reactor

Thermal Power Generation Vol. 54, Issue 11, Pages: 91-97(2025)

更新时间：2026-08-11

- Experimental study on deposition law of corrosion products in throttle orifice of steam generator in high temperature gas cooled reactor
- 作者机构：
  
  1. 华能核能技术研究院有限公司
  2. 西安热工研究院有限公司
  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.202502037
  CLC： TL424;TL353.13
- Published：2025
- 稿件说明：
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[1]王威,张贵泉,吴志军,等.高温气冷堆蒸汽发生器节流孔腐蚀产物沉积规律实验研究[J],2025,54(11):91-97.
[1]王威,张贵泉,吴志军,等.高温气冷堆蒸汽发生器节流孔腐蚀产物沉积规律实验研究[J],2025,54(11):91-97. DOI： 10.19666/j.rlfd.202502037.

DOI：10.19666/j.rlfd.202502037.

摘要

介绍了高温气冷堆示范工程中直流蒸汽发生器和节流组件的结构特点，分析了沉积物堵塞节流孔的原因和影响因素，并通过高温高压动态循环实验装置模拟研究了高温气冷堆蒸汽发生器节流孔处腐蚀产物的沉积规律，包括不同铁源、铁质量分数、流速和pH值对节流孔沉积的影响。结果表明：游离态铁是节流孔沉积物的主要前驱体；节流孔沉积现象随水质中铁质量分数增加而加剧；节流孔沉积速率随局部流速的增加先升高后降低，存在最大沉积流速区间；水质pH值由9.1升至9.7过程中，节流孔沉积现象加剧。研究发现，适当降低给水pH值和优化节流孔结构尺寸（调整流速）是抑制蒸汽发生器节流组件沉积堵塞的有效方法。

Abstract

The structural characteristics of once-through steam generators and throttling assembly in the demonstration project of high-temperature gas cooled reactors were introduced

and the reasons and influencing factors of sediment blocking the throttling holes were analyzed. Moreover

the deposition law of corrosion products on the throttling holes of steam generators in high-temperature gas cooled reactors was studied by dynamic cyclic tests at high temperatures and high pressures

including the effects of different iron sources

iron mass fractions

flow rates

and pH values on throttling hole deposition. The results show that

free iron is the main precursor of throttling pore sediments. The phenomenon of throttling hole sediment increases with the iron mass fraction in water. With the increase of local flow velocity

the sedimentation rate of throttling hole increases at first and then decreases

and there exists a maximum deposition velocity range. As the pH value of the water increases from 9.1 to 9.7

the phenomenon of throttle hole deposition intensifies. It is found that appropriately reducing the pH value of feed water and optimizing throttle hole structure size(adjusting flow rate) are effective methods to inhibit the deposition and blockage of steam generator throttling components.

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references

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