Maintenance and replacement type heat insulation sleeve of control rod driving mechanism and installation method thereof

• Main Authors: LI ZHENGGUANG, NIE WENZHE, QI HONGCHANG, LIN QIN, LU SHAOWEI, ZHU CHANGRONG, ZHOU WEI, ZHOU RUIDONG, FAN WEIFENG, GE LIANWEI, MENG WEIMIN, HE JIAHUAN
• Format: Patent
• Language: Chinese; English
• Published: 30.01.2024
• Subjects: NUCLEAR ENGINEERING; NUCLEAR PHYSICS; NUCLEAR REACTORS; PHYSICS

The invention belongs to the technical field of nuclear power, and particularly relates to a control rod driving mechanism maintenance and replacement type heat insulation sleeve and an installation method thereof. According to the maintenance and replacement type heat insulation sleeve, the upper end of the heat insulation sleeve is structurally moved downwards to the end opening of the penetration piece, the contact form of line contact is reserved, and the structure form has a rod falling and water squeezing function; other structural forms are not changed, and the functional requirements of the heat insulation sleeve are met. The whole maintenance and replacement type heat insulation sleeve assembly is installed in a complete set mode and is fixedly installed at the lower end opening of the pipe base in a welding mode. Meanwhile, due to the fact that the supporting face descends, the flow-induced vibration impact force arm is reduced, the positioning block is additionally arranged, and the service life of