二氧化硅纳米气凝胶保温材料与高温钠相容性试验研究

doi:10.11896/cldb.24060077

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Abstract It is important to ensure the equipment of sodium-cooled fast reactor operates efficiently and safely, as well as the reactor operates stably. The application of new silica nanoporous aerogel thermal insulation material in sodium-cooled fast reactor system was explored, and the high-temperature performance and sodium fire resistance of the materials were studied. This paper presents the experimental study on the compatibility behavior of a new type of nanoporous aerogel thermal insulation material in high-temperature sodium for sodium-cooled fast reactor. The temperature of the whole combustion process of the insulation material with sodium was recorded and observed, and the composition change of the material before and after combustion was analyzed. The test results show that the nanoporous aerogels insulation materials will release CO, CO₂ and other gases after baking at high temperature in air, but the composition remains unchanged. When sodium leakage occurs, if the sodium is not burning, the insulation material is completely filled with sodium, and its properties are changed. However, after the sodium leakage combustion happens, it will directly cause the combustion of thermal insulation materials, and the combustion temperature of sodium increases, the consequences of the accident were aggravated. After the combustion, the thermal insulation materials become black and brittle, and the interior is full of sodium particles, so the properties of thermal insulation materials are completely changed, and the potential hazards were easily caused. There are great safety risks while the silica nanoporous aerogel thermal insulation material is used in sodium-cooled fast reactor system under the condition of sodium leakage.

Key words： sodium-cooled fast reactor nanoporous aerogel silica aerogel thermal insulation material sodium leak sodium fire accident sodium aerosol

Published: Online: 2025-10-27

CLC number:

TL43+3

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	Articles by authors
	ZHANG Jinquan
	RUAN Zhangshun
	QIN Bo
	FU Xiaogang
	LONG Bin
	ZHOU Zhangjian
	YUN Di

Cite this article:

ZHANG Jinquan,RUAN Zhangshun,QIN Bo, et al. Investigation on the Compatibility of Nanoporous Aerogel Thermal Insulation Materials in High-temperature Sodium[J]. Materials Reports, 2025, 39(20): 24060077-6.

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https://www.mater-rep.com/EN/10.11896/cldb.24060077 OR https://www.mater-rep.com/EN/Y2025/V39/I20/24060077

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