核电厂安全级数字化仪控系统故障缺省值的验证与确认

Verification and Validation of Fault Default Values for Digital Instrument and Control System in Nuclear Power Plant

安全级数字化仪控系统中故障缺省值的设置对核电厂安全具有至关重要的作用,但其验证与确认的难点在于具体实施时缺乏明确的细则指导。基于IEEE Std 1012,结合对法规标准、缺省值设计原则及以往项目实施经验的分析,同时考虑到漳州核电一期项目数字化仪控系统平台及设计开发流程的特点,提出了一套针对安全级数字化仪控系统故障缺省值的验证与确认策略和方法。经过漳州核电一期的实践验证,这套策略和方法能够充分、高效地验证缺省值设计的正确性和完整性,有效缓解了验证与确认过程中缺乏详尽标准、理论及相关成熟经验可借鉴的困境。对于后续核电安全级数字化仪控系统故障缺省值的验证与确认工作,该策略和方法具有一定的参考价值。

The setting of default values for faults in safety level digital instrument and control system is crucial for the safety of nuclear power plants,but the difficulty in its verification and confirmation lies in the lack of clear guidelines for implementation.Based on IEEE Std 1012,combined with the analysis of regulatory standards,default value design principles,and past project implementation experience,and taking into account the characteristics of the digital instru-ment and control system platform and design development process of the Zhangzhou Nuclear Power Phase I project,a set of verification and confirmation strategies and methods for safety level digital instrument and control system fault default values is proposed.After the practical verification of the first phase of Zhangzhou Nuclear Power Plant,this strategy and method can fully and efficiently verify the correctness and completeness of the default value design,effectively alleviating the dilemma of lacking detailed standards,theories,and relevant mature experiences to refer to in the verification and confirmation process.This strategy and method have certain reference value for the verification and confirmation of default values of digital instrument and control system for nuclear power safety in the future.