加速器驱动次临界系统始发事件的选取研究

Selection of Initial Events of Accelerator Driven Subcritical System

概率安全评价(PSA)是一种重要的反应堆安全分析方法,对反应堆的设计、运行具有指导作用。始发事件的选取是对反应堆实施概率安全评价的起点和基础。加速器驱动次临界系统(ADS)由于先进的设计特征、复杂的系统构成及缺乏工程和运行经验,其始发事件的确定具有一定的难度。本文基于目前设计方案,分析该ADS系统具有的安全特性及特殊问题,采用主逻辑图(MLD)推导其始发事件,并参考其他先进研究堆相关经验,最终得到一组始发事件清单,为下一步安全评价工作的展开提供了依据。

The Probabilistic Safety Assessment （PSA） is an important tool in reactor safety analysis and a significant reference to the design and operation of reactor. It is the origin and foundation of the PSA for a reactor to select the initial events. Accelerator Driven Suberitieal System （ADS） has advanced design characteristics, complicated subsystems and little engineering and operating experience, which makes it much more difficult to identify the initial events of ADS. Based on the current design project of ADS, the system＇s safety characteristics and special issues were analyzed in this article. After a series of deductions with Master Logic Diagram （MLD） and considering the relating experience of other advanced research reactors, a preliminary initial events was listed finally, which provided the foundation for the next safety assessment.