快堆DAS系统设置分析

The Analysis of DAS Setting in Fast Reactor

反应堆中,多样性驱动系统DAS(Diverse Actuation System)的设计目的是减小设计中的"未能紧急停堆的预期瞬态"和共模故障可能引起的严重事故的概率。为了确定快堆DAS系统设置的必要性,对若干压水堆的典型DAS系统的结构和设计进行了调研,并对其功能和技术特点进行了归纳和对比。根据调研结果,同时分析了相关安全法规的要求,结合快堆自身的特点,得出的结论是:从应对软件共模故障的角度,快堆应设置DAS系统。对此,结合DAS系统的目的、范围和功能要求,得出快堆DAS系统的设计方案,包括DAS系统原理结构框图和建议的DAS系统保护参数,进而为示范快堆DAS系统设计提供参考。

Reactors, diversity drive system DAS （Diverse Actuation System） is designed to reduce the probability of severe accidents in the design of ＂anticipated transients without scram＂ and common mode failure may result. In order to determine the necessity of fast reactor DAS system settings, the structure and design of PWR several typical DAS system conducted an investigation, and carried out summary and comparison of their features and technical characteristics. According to research results, and analyzes the relevant safety regulations, combined with the characteristics of fast reactor itself, the conclusion is： the failure to deal with from the perspective of the common-mode software, fast reactors should be set DAS system. This, combined with the DAS system purpose, scope and functional requirements, obtain fast reactor DAS system design, including the DAS system block diagram of the principle and the suggested DAS system protection parameters, and then for the demonstration fast reactor DAS system designed to provide a reference.