压水堆核电厂一回路冷却剂条件110mAg胶体形成机理与制备研究

Abstract

Abstract: Under the condition of the simulating water quality of the primary circuit of PWR, colloidal silver nanoparticles were prepared by using lithium borate solution as the medium and hydrazine to reduce silver nitrate. The effects of reducing agent, boric acid, concentration of Ag⁺, temperature and irradiation conditions on the properties of colloidal silver were investigated. The results showed that boric acid and reducing agent hydrazine can effectively stabilize the colloidal particles. When the molar ratio of hydrazine to silver is 1.0-2.0, the reduction rate of Ag⁺ is the highest and the colloid is the most stable. The higher the concentration of silver ions, the more negative charges on the surface of colloidal particles, therefore there will be less particle aggregation, and the colloidal stability will be enhanced. Under high temperature and high pressure water environment, it is easier to form colloidal particles with larger particle size. While the irradiation dose ranges from 0.9 kGy to 7.2 kGy, colloidal silver can be formed with or without hydrazine.

Key words: ^110mAg colloid, hydrazine, irradiation

CLC Number:

TL75

SUN Yun, XIAO Yan, LI Fuhai, LIN Genxian, LIU Canshuai, SONG Lijun. Study on the formation mechanism and preparation of ^110mAg colloid in the primary circuit of PWR nuclear power plant[J].RADIATION PROTECTION, 2024, 44(3): 248-256.

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Study on the formation mechanism and preparation of ^110mAg colloid in the primary circuit of PWR nuclear power plant

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Study on the formation mechanism and preparation of ^110mAg colloid in the primary circuit of PWR nuclear power plant