Laboratory Simulation of Crud Deposition on Zr-alloy Fuel Cladding in Simulated Pressurized Water Reactor Primary Coolant

doi:10.11902/1005.4537.2022.022

Journal of Chinese Society for Corrosion and protection

2023, Vol. 43

Issue (1): 197-201 DOI: 10.11902/1005.4537.2022.022

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Laboratory Simulation of Crud Deposition on Zr-alloy Fuel Cladding in Simulated Pressurized Water Reactor Primary Coolant

LIAO Jiapeng(

), MAO Yulong, JIN Desheng, LI Jinggang

China Nuclear Power Technology Research Institute, Shenzhen 518000, China

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Abstract

For pressurized water reactor (PWR) nuclear power plant, crud on fuel cladding is derived from primary corrosion products, which deposit on the surface of fuel assembly. Crud deposition is affected by the coupling effects between the primary coolant environment and the thermal-hydraulic condition. The crud on cladding surface can affect the operation safety and economic benefits of the reactor. In this paper, the main factors affecting the crud deposition behavior on the surface of fuel cladding were described. The crud deposition process on the domestic Zr-alloy cladding was assessed via a home-made experimental set. As a result, the porous and chimney-like crud was successfully reproduced, while which composed mainly of NiFe₂O₄, Fe₂O₃ and NiO, besides the precipitation of LiBO₂ was detected. The experiment results indicated that the crud deposition on PWR fuel cladding could be reliably reproduced through laboratory simulation.

Key words: pressurized water reactor zirconium alloy cladding crud deposition primary coolant

Received: 18 January 2022 32134.14.1005.4537.2022.022

ZTFLH:

TG172

Fund: China Postdoctoral Science Foundation(2021M703023)

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	Jiapeng LIAO
	Yulong MAO
	Desheng JIN
	Jinggang LI

Cite this article:

LIAO Jiapeng, MAO Yulong, JIN Desheng, LI Jinggang. Laboratory Simulation of Crud Deposition on Zr-alloy Fuel Cladding in Simulated Pressurized Water Reactor Primary Coolant. Journal of Chinese Society for Corrosion and protection, 2023, 43(1): 197-201.

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https://www.jcscp.org/EN/10.11902/1005.4537.2022.022 OR https://www.jcscp.org/EN/Y2023/V43/I1/197

Fig.1 Schematic diagram of crud deposition test device

Fig.2 Macro surface morphology of the sample after crud deposition test

Fig.3 Micro surface morphology (a) and high-magnifica-tion image (b) of the sample after crud deposition test

Fig.4 Macro cross-sectional morphologies of the sample after fuel crud test at 0° (a), 90° (b), 180° (c) and 270° (d) indicate the four circumferential regions

Fig.5 Micro cross-sectional morphology of the sample after fuel crud test

Fig.6 XPS fine spectra of B1s (a), O1s (b), Fe2p3/2 (c) and Ni2p3/2 (d) in fuel crud formed on the sample during crud deposition test

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