辐射防护2025，Vol.45Issue(z1)：18-25,8.
用于压水堆一回路去污的Ce(Ⅳ)+超声去污技术研究
Study on Ce(Ⅳ)plus ultrasonic decontamination technology for primary circuit decontamination of PWR
杨蕊 1曲啸虎 1郑开元 2田春平 2郭晋汉 2王钊 2刘婷婷 1周羽 1高杨1
作者信息
- 1. 哈尔滨工程大学,哈尔滨 150002
- 2. 武汉第二船舶设计研究所,武汉 430205
- 折叠
摘要
Abstract
Aiming at the corrosion products generated during the operation of the primary circuit of the pressur-ized water reactor,the synergistic decontamination technology of Ce(Ⅳ)and ultrasound was studied.The 304 stainless steel was selected as the sample,and the high-pressure reaction vessel was used to simulate the corro-sion environment of the primary circuit of the pressurized water reactor to produce a corrosion sample for decon-tamination.The effects of different Ce(Ⅳ)concentration,nitric acid concentration and ultrasonic factors on the decontamination efficiency were investigated,and the corrosion of metal matrix materials under different condi-tions was studied.The results show that the surface morphology of the corrosion layer produced by the high-pressure reaction vessel is dense and uniform,and there are no obvious voids and cracks.In the decontami-nation experiment,the concentration of Ce(Ⅳ)has a significant impact on the decontamination effect.When the concentration of cerium ammonium nitrate is 25 mmol/L,the decontamination solution has the highest decon-tamination efficiency on the oxide film;The effect of nitric acid concentration on the decontamination effect is not significant,and the decontamination efficiency is not much different under different nitric acid concentra-tions.However,with the increase of nitric acid concentration,the decontamination efficiency increases first and then decreases.When the concentration of nitric acid is 1.5 mol/L,the decontamination efficiency reaches the highest;The addition of ultrasonic factors will significantly improve the decontamination effect;The decontami-nation solution has good compatibility with the metal matrix material;The maximum corrosion amount of the metal matrix material is 6.25 g/m2,which is far lower than the upper limit of the corrosion amount of the matrix material and the upper limit of the corrosion amount of the precision parts specified in the industry standard.关键词
金属腐蚀/Ce(Ⅳ)去污/超声去污Key words
metal corrosion/Ce(Ⅳ)decontamination/ultrasonic decontamination分类
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杨蕊,曲啸虎,郑开元,田春平,郭晋汉,王钊,刘婷婷,周羽,高杨..用于压水堆一回路去污的Ce(Ⅳ)+超声去污技术研究[J].辐射防护,2025,45(z1):18-25,8.
