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Effect of dissolved oxygen on deposition rules of corrosion products in orifice of steam generators
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Guiquan ZHANG1, Wei WANG2, Jiantao YAO1, Guojun LONG1, Zhijun WU2, Jingjing JIA3
Thermal Power Generation | 2025, 54(10) : 126 - 132
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Thermal Power Generation | 2025, 54(10): 126-132
• Power generation technology forum •
Effect of dissolved oxygen on deposition rules of corrosion products in orifice of steam generators
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Guiquan ZHANG1, Wei WANG2, Jiantao YAO1, Guojun LONG1, Zhijun WU2, Jingjing JIA3
Affiliations
  • 1.Xi’an Thermal Power Research Institute Co., Ltd., Xi’an 710054, China
  • 2.Huaneng Nuclear Energy Technology Research Institute Co., Ltd., Shanghai 200126, China
  • 3.Huaneng Shandong Shidao Bay Nuclear Power Co., Ltd., Rongcheng 264312, China
Published: 2025-10-25 doi: 10.19666/j.rlfd.202412260
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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.

HTGR  /  orifice  /  deposition rate  /  dissolved oxygen  /  electrokinetic effect
Guiquan ZHANG, Wei WANG, Jiantao YAO, Guojun LONG, Zhijun WU, Jingjing JIA. Effect of dissolved oxygen on deposition rules of corrosion products in orifice of steam generators[J]. Thermal Power Generation, 2025 , 54 (10) : 126 -132 . DOI: 10.19666/j.rlfd.202412260
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  • Science and Technology Project of China Huaneng Group Co., Ltd.(HNKJ22-H09)
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Year 2025 volume 54 Issue 10
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Article Info
doi: 10.19666/j.rlfd.202412260
  • Receive Date：2024-12-05
  • Online Date：2026-03-05
  • Published：2025-10-25
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  • Received：2024-12-05
Funding
Science and Technology Project of China Huaneng Group Co., Ltd.(HNKJ22-H09)
Affiliations
    1.Xi’an Thermal Power Research Institute Co., Ltd., Xi’an 710054, China
    2.Huaneng Nuclear Energy Technology Research Institute Co., Ltd., Shanghai 200126, China
    3.Huaneng Shandong Shidao Bay Nuclear Power Co., Ltd., Rongcheng 264312, China
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表12种不同金属材料的力学参数
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小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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