一回路水化学对燃料包壳表面CRUD(污垢)的影响  

Effects of Primary Water Chemistry on Fuel CRUD

作　　者：鲍一晨 陈志刚 石秀强 刘晓强 张乐福[2] BAO Yichen;CHEN Zhigang;SHI Xiuqiang;LIU Xiaoqiang;ZHANG Lefu(Shanghai Nuclear Engineering,Research and Design Institute,Shanghai 200233,China;School of Nuclear Science and Engineering,Shanghai JiaoTong University,Shanghai 200240,China)

机构地区：[1]上海核工程研究设计院有限公司,上海200233 [2]上海交通大学核科学与工程学院,上海200240

出　　处：《腐蚀与防护》2022年第10期1-6,32,共7页Corrosion & Protection

基　　金：大型先进压水堆及高温气冷堆核电站(2019ZX06004002)。

摘　　要：分析了一回路水化学对CRUD(污垢)沉积影响的国外研究现状。结果表明,锆合金包壳表面CRUD沉积量随着一回路冷却剂pH_(T)的升高而显著降低。部分研究表明CRUD沉积量随着溶解氢的提高而增加,亦有研究表明溶解氢对CRUD沉积量无任何影响。注锌可能减少CRUD的沉积,也可能增加CRUD的沉积。冷却剂中Ni、Fe腐蚀产物的浓度以及锆合金包壳材料表面初始性能同样对CRUD的沉积产生影响:腐蚀产物浓度越高,CRUD沉积量越多;锆合金表面氧化膜越厚,污垢(CRUD)沉积量越多。The current situation of foreign researches on the effects of primary water chemistry on fuel CRUD deposition are analyzed. The results show that the CRUD deposition on the surface of zirconium alloy cladding significantly decreases with the increase of primary coolant pH_(T). Some studies show that CRUD deposition increases with the increase of dissolved hydrogen, while others show that dissolved hydrogen has no influence on CRUD deposition. Zinc injection might reduce CRUD deposition, and might also increase CRUD deposition. The concentration of Ni and Fe corrosion products in the coolant and the initial surface properties of zirconium alloy cladding materials also affect the deposition of CRUD: the higher the concentration of corrosion products, the more the CRUD deposition;The thicker the surface oxide film of zirconium alloy, the more the CRUD deposition.

关 键 词：锆合金包壳 CRUD PHT 溶解氢 注锌 

分 类 号：TG174[金属学及工艺—金属表面处理]