重水堆核电厂应急行动水平的改进

Improvement of Emergency Action Levels of Heavy Water Reactor NPP

本文介绍的改进是针对秦山第三核电厂于2010年发布的应急初始条件(IC)及应急行动水平(EAL)第三版进行的修订,修订考虑了IAEA有关标准和文件的新变化、美国NRC有关导则的改变以及我国正在开展的核安全导则制定。修订采用了秦山第三核电厂现有IC&EAL的应用实践,并考虑了电厂技术文件升版中有关变化。本次修订的重点包括:适用运行模式;安全壳γ辐射水平对应的EAL;辐射水平异常和放射性流出物异常的EAL;核电基地统一考虑自然灾害IC&EAL;扩展了有毒或可燃气体、保安事件的IC&EAL。

This paper describes the revision of the initial conditions( IC) and emergency action levels( EALs) of the Qinshan-III 2010 version. The ongoing revision was made considering the changes made in the relevant IAEA standards and documents,in the US NRC guides and in the nuclear safety guides of Chinese version. Both current practice of the Qishan-III NPP IC and EALs and the changes in the QNPP updated technical documents are reflected in the revision. The main revisions focus applicable operation modes,EALs for gamma radiation levels in containment,EALs for abnormal radiation level or radioactive effluents,and IC /EALs for natural disasters covered at the QNPP Base and for chemical hazards and security events.