Design Improvement of CRDM Nozzle for RPV

Wang Xiaobin; Li Yuguang; Luo Ying; Fang Caishun; Chen Haibo

doi:10.13832/j.jnpe.2015.04.0103

Volume 36 Issue 4

Feb. 2025

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Wang Xiaobin, Li Yuguang, Luo Ying, Fang Caishun, Chen Haibo. Design Improvement of CRDM Nozzle for RPV[J]. Nuclear Power Engineering, 2015, 36(4): 103-106. doi: 10.13832/j.jnpe.2015.04.0103

Citation:

Wang Xiaobin, Li Yuguang, Luo Ying, Fang Caishun, Chen Haibo. Design Improvement of CRDM Nozzle for RPV[J]. Nuclear Power Engineering, 2015, 36(4): 103-106. doi: 10.13832/j.jnpe.2015.04.0103

Wang Xiaobin, Li Yuguang, Luo Ying, Fang Caishun, Chen Haibo. Design Improvement of CRDM Nozzle for RPV[J]. Nuclear Power Engineering, 2015, 36(4): 103-106. doi: 10.13832/j.jnpe.2015.04.0103

Citation:

Wang Xiaobin, Li Yuguang, Luo Ying, Fang Caishun, Chen Haibo. Design Improvement of CRDM Nozzle for RPV[J]. Nuclear Power Engineering, 2015, 36(4): 103-106. doi: 10.13832/j.jnpe.2015.04.0103

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Design Improvement of CRDM Nozzle for RPV

doi: 10.13832/j.jnpe.2015.04.0103

Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu, 610041, China

Received Date: 2014-09-26
Rev Recd Date: 2015-01-02

Available Online: 2025-02-15

Abstract

Abstract

Based on the design structure and manufacture techniques of CRDM（Control Rod Drive Mechanism） nozzle, this paper analyzes and determines the root causes for the changes of inside diameter and perpendicularity for CRDM nozzle in terms of weld structure design, characteristics of stainless steel, design strength and implementation of pressure tests of the nozzle, and proposes the measures to control the key parameters.
- CRDM nozzle,
- Pressure test,
- Dimension increasing,
- Reason analysis,
- Control measures