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  • Analysis of SGTR with PMS software failure accident

    分类: 物理学 >> 核物理学 提交时间: 2025-02-06

    摘要: Digital instrument and control technology has gradually applied in nuclear power plant (NPP), the common cause failure (CCF) due to improper design and/or use may affect the safety of NPP. The purpose of this paper is to analyze the steam generator tube rupture (SGTR) combined with PMS software common cause failure in third-generation passive nuclear power plants. The III generation passive nuclear power plants provide automatic protection measures for SGTR accidents, including reactor shutdown, core makeup tank initiated, passive residual heat removal system heat exchanger action, isolation startup feedwater and chemical volume control system. To further demonstrate the safety of the plant, it is assumed that all of the above protective measures have failed due to a PMS failure, and verify only DAS signals and operator actions can mitigate the accident and bring the plant to a safe steady-state state. The analysis results show that the ruptured SG will not overfill in the whole accident process, the accident consequences are not limited, and the radioactive consequences meet the limit requirements.