Research on non-uniform control rod system of PWR. (January 2022)

• Record Type: Journal Article
• Authors: Liu, Cheng; Zhao, Fuyu; Liu, Du; Yang, Bo; Li, Jiangbo; Zhang, Xiulu; Pan, Yingchun; Chen, Zhong
• Is Part Of: Annals of nuclear energy. Volume 165(2022)
• Publication Date: 2022-01
• Subjects: PWR -- Non-uniform power control rod system -- Mode D -- MCNP5; Nuclear energy -- Periodicals; Nuclear engineering -- Periodicals; 621.4805
• DOI: 10.1016/j.anucene.2021.108693
• Languages: English
• ISSNs: 0306-4549

Abstract

Highlights: The concept of non-uniform control rod system is proposed. The control strategy Mode D is proposed for of non-uniform control rod system. Mode D simplifies the control strategy and improves the load following ability and security. Abstract: In order to improve the axial power distribution control performance of PWR power control system and simplify the control strategy, three non-uniform power control rod systems based on the novel non-uniform power control rod and their decoupling mode control strategy (mode D) are proposed. The types A, B, and AB non-uniform control rod systems of Qinshan nuclear power plant in China are established by MCNP5. These three non-uniform power control rod systems adopt mode D to control the core power. The radial and axial neutron flux densities of three non-uniform control rod systems at four rod positions are separately calculated. The simulation results show that types A, B, and AB non-uniform control systems adopting the mode D have good power level control performance, and type AB non-uniform control system has the best axial distribution performance. Compared with the other four control strategies, the mode D is simpler.