Effects of NaCl addition on magnetite deposition on the outer surfaces of steam generator tubes

被引：2

作者：

Lee, Ji-Min ^{[1
]}

Jeon, Soon-Hyeok ^{[1
]}

Han, Jeoh ^{[1
,2
]}

Hur, Do Haeng ^{[1
]}

机构：

[1] Korea Atom Energy Res Inst, Mat Safety Technol Dev Div, 989-111 Daedeok Daero, Daejeon 34057, South Korea

[2] Yonsei Univ, Dept Mat Sci & Engn, 50 Yonsei Ro, Seoul 03722, South Korea

来源：

ANNALS OF NUCLEAR ENERGY | 2021年 / 151卷

基金：

新加坡国家研究基金会;

关键词：

Steam generator tube; Water chemistry; Magnetite deposit; Sodium chloride; Concentration factor;

D O I：

10.1016/j.anucene.2020.107886

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

During the operation of a steam generator (SG), NaCl can be introduced into the secondary system of a pressurized water reactor owing to the condenser inleakage. In this study, the effects of NaCl addition on magnetite deposition on SG tubes were investigated using a magnetite deposition test loop that can simulate the secondary side condition of SGs. The results showed that the deposited magnetite particles were polyhedral in shape regardless of NaCl, but the particles became smaller and more round with the addition of NaCl. The two-dimensional porosity of magnetite deposits decreased from 30.0% to 18.9% with the addition of NaCl. Furthermore, the amount of deposits was reduced by 46% with the addition of NaCl, which is discussed in terms of particle size, magnetite solubility, and zeta potential. The concentration factor of Na and Cl within the deposits were evaluated to be 6.2 x 10(5) and 1 x 10(4), respectively. (C) 2020 Elsevier Ltd. All rights reserved.

引用

页数：9

共 33 条

[1] Experimental simulation of Na and Cl hideout in steam generator crevices [J].