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Science and Technology of Nuclear Installations
Volume 2015, Article ID 620205, 11 pages
Research Article

Study of the Reactor Control System of MSHIM in AP1000

School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, China

Received 8 September 2015; Revised 4 November 2015; Accepted 12 November 2015

Academic Editor: Eugenijus Ušpuras

Copyright © 2015 Xinyu Wei and Fuyu Zhao. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


According to the mechanism analysis and simulation of power control system of MSHIM in AP1000, a modified MSHIM (Mechanical Shim) control strategy is presented, which employs the error between the reactor coolant average temperature and its reference value as the unique control signal with a P-controller added. The modified MSHIM control strategy is verified by simulations of three typical working conditions. The results show that the modified power control system satisfies the needs of reactor core power control and power distribution control. The conclusions have reference value for the engineering practice.