Characterization of crud deposited on fuel rods under HWC environment in Kuosheng Nuclear Power Plant

Under normal water chemistry conditions, the oxygen and hydrogen peroxide produced by water radiol- ysis in the coolant of boiling water reactors （BWRs） can lead to intergranular stress corrosion cracking in the con- stituent materials of plant components. This fact has led to the wide-scale adoptio...

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Bibliographic Details
Published in:Nuclear science and techniques 2016-02, Vol.27 (1), p.141-148, Article 1
Main Authors: Tsai, Tsuey-Lin, Su, Te-Yen, Wang, Tsung-Yuan, Yang, Tsen-Yu
Format: Article
Language:English
Subjects:
Energy
Hadrons
Heavy Ions
Nuclear Energy
Nuclear Physics
X射线衍射分析
反应堆冷却剂系统
扫描电子显微镜
核电站
沉积
燃料棒
电感耦合等离子体原子发射光谱法
表征
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Summary:Under normal water chemistry conditions, the oxygen and hydrogen peroxide produced by water radiol- ysis in the coolant of boiling water reactors （BWRs） can lead to intergranular stress corrosion cracking in the con- stituent materials of plant components. This fact has led to the wide-scale adoption of hydrogen water chemistry （HWC） in the nuclear industry to counteract these effects. This study seeks to characterize the metallic composition and the surface properties of the constituent materials of plant components in order to determine their effects on the accumulation of chalk river unidentified deposits （cmd） on fuel rods in the BWR Unit-1 of the Kuosheng Nuclear Power Plant in Taiwan, Inductively coupled plasma-atomic emission spectroscopy was used to calculate the concen- trations of surface crud and gamma spectrometry was used to determine the radioactivity of the corrosion products, as well as their axial distribution across the surface of the fuel rods. X-ray diffraction analysis and scanning electron microscopy/energy-dispersive X-ray spectroscopy were used to identify the crystalline phase and morphology of the crud as irregular shapes and flakes. The amount of crud deposited during the fourth fuel cycle exceeded that of the third fuel cycle due to extended bum-up time. Our ana- lytical results indicate that the implementation of HWC had no significant effect on the characteristics of subsequent crud.
ISSN:1001-8042
2210-3147
DOI:10.1007/s41365-016-0013-x