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Volume 49
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Proceeding Paper

Analysis of the Fallback Values of Digital Control Systems in Nuclear Power Plants †

by
Zhenying Wang
*,
Liu Liu
*,
Zhiyun Liu
,
Yu Huang
,
Mingxin Hu
and
Tingwei Ma
China Nuclear Power Engineering Company, Ltd., Shenzhen 518000, China
*
Authors to whom correspondence should be addressed.
†
Presented at the 8th International Symposium on Sensor Science—China, Nanjing, China, 29–31 March 2023.
Eng. Proc. 2023, 49(1), 2; https://doi.org/10.3390/engproc2023049002
Published: 14 March 2024
(This article belongs to the Proceedings of The 8th International Symposium on Sensor Science - China)
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Abstract

A digital control system (DCS), based on the Mitsubishi MELTAC + HOLLIAS platform, has been developed in ACPR1000 nuclear power plants. To fully utilize the superiority of digitalized technology, an analysis of fallback value setting in a DCS was conducted. Fallback values, as the substitution of invalid signals when they are detected in a DCS, are in a uniquely dominant position to determine the system behavior and consequences of a nuclear power plant’s operation, as they participate in the control logic in place of invalid signals. After briefly introducing both the architecture of the ACPR1000 DCS and the invalidity management mechanism of signals, the failure mode of signals from sensors to DCS cabinets, the analysis range for fallback values, analysis principles a nd method, the implementation of modes for various signals, and engineering applications are summarized in this paper. This study is significant for enhancing the reliability of the instrument and control system itself and guaranteeing the safety level of nuclear power plants.
Keywords: nuclear power plant; digital control system; fallback value; reliability; safety nuclear power plant; digital control system; fallback value; reliability; safety

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MDPI and ACS Style

Wang, Z.; Liu, L.; Liu, Z.; Huang, Y.; Hu, M.; Ma, T. Analysis of the Fallback Values of Digital Control Systems in Nuclear Power Plants. Eng. Proc. 2023, 49, 2. https://doi.org/10.3390/engproc2023049002

AMA Style

Wang Z, Liu L, Liu Z, Huang Y, Hu M, Ma T. Analysis of the Fallback Values of Digital Control Systems in Nuclear Power Plants. Engineering Proceedings. 2023; 49(1):2. https://doi.org/10.3390/engproc2023049002

Chicago/Turabian Style

Wang, Zhenying, Liu Liu, Zhiyun Liu, Yu Huang, Mingxin Hu, and Tingwei Ma. 2023. "Analysis of the Fallback Values of Digital Control Systems in Nuclear Power Plants" Engineering Proceedings 49, no. 1: 2. https://doi.org/10.3390/engproc2023049002

APA Style

Wang, Z., Liu, L., Liu, Z., Huang, Y., Hu, M., & Ma, T. (2023). Analysis of the Fallback Values of Digital Control Systems in Nuclear Power Plants. Engineering Proceedings, 49(1), 2. https://doi.org/10.3390/engproc2023049002

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