核安全级数字化仪控系统软件可靠性评估  

Evaluation of Nuclear Safety-Critical Software Reliability of DCS

作　　者：刘盈 杨明 

机构地区：[1]中国核动力研究设计院核反应堆系统设计技术重点实验室,成都610213 [2]哈尔滨工程大学核安全与仿真技术国防重点学科实验室,哈尔滨150001

出　　处：《核动力工程》2016年第1期143-147,共5页Nuclear Power Engineering

摘　　要：采用核电厂安全审查大纲技术的分支NUREG-0800 BTP7-14分别建立基于贝叶斯(Bayes)网络的阶段评估模型以及综合评估模型。在阶段评估模型中,确立8个阶段,通过13个一级指标、74个二级指标、326个三级指标来完成对软件阶段性的实时评估。选用Hugin贝叶斯网络分析工具,针对测试对象展开预测推理及敏感性分析。经过测试后得到该软件在生命周期不同阶段对标准的符合程度,经综合评估模型推理,可得该软件在标准层面的可靠性指标是98.84%。经敏感性分析,可以定性地发现软件在生存周期中存在的薄弱环节,为评估核安全级数字化仪控系统的可靠性和安全性奠定基础。This paper tries to choose Bayesian Belief Networks （BBN） method to build the evaluation models. The stage evaluation models are constructed based on NUREG-0800 BTP7-14. It finished the software real-time evaluation in stages using 13 first-level indexes, 74 second-level indexes, 326 third-level indexes.HUGIN software is chosen as the Bayesian Networks Analysis tool. Predictive inference and sensitivity analysis are given to the testing object. After testing, the degree of compliance with standards at different stages of the life cycle can be obtained. The software reliability is 98.84% by using the evaluation model, thus, the reliability of the failure-free software operation can be calculated from the quantitative aspect. After predictive inference, sensitivity analysis, the weaknesses in software development process can be found from the qualitative aspect. It can be a base for evaluatinK the reliability and safety of the DCS.

关 键 词：核安全级 数字化仪控系统 软件可靠性 标准 贝叶斯网络 

分 类 号：TL333[核科学技术—核技术及应用]