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  

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

作　　者：孙云[1] 肖艳 李富海 林根仙[1] 刘灿帅 宋利君[1] SUN Yun;XIAO Yan;LI Fuhai;LIN Genxian;LIU Canshuai;SONG Lijun(Suzhou Nuclear Power Research Institute Co.Ltd.,Jiangsu Suzhou 215004)

机构地区：[1]苏州热工研究院有限公司,江苏苏州215004

出　　处：《辐射防护》2024年第3期248-256,共9页Radiation Protection

摘　　要：在模拟压水堆一回路冷却剂条件下,以硼锂溶液为介质、联氨还原硝酸银来制备胶体纳米银,并探究了还原剂、硼酸、Ag+浓度、温度与辐照条件对胶体银性能的影响。结果表明,加入硼酸与还原剂联氨可有效稳定胶体颗粒,联氨与银的摩尔比为1.0~2.0时Ag^(+)的还原率最高,胶体最稳定。随着银离子浓度升高,胶体颗粒表面负电荷增多,颗粒不易团聚,胶体稳定性增强。高温高压的水环境下,更易形成更大粒径的胶粒。辐照剂量在0.9 kGy~7.2 kGy范围内,在有无联氨的条件下均可形成胶体银。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.

关 键 词：^(110m)Ag胶体 联氨 辐照 

分 类 号：TL75[核科学技术—辐射防护及环境保护]