首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 46 毫秒
1.
根据HAF102-2004的要求,核电站设计中应考虑对于严重事故的预防及缓解设置,而严重事故用仪表的可用性是实现严重事故管理策略要求的先决条件。为满足国内三代核电站华龙一号堆型提出的针对严重事故鉴定的新要求,结合福清5、6号项目严重事故用压力、差压变送器的选型设计,梳理了变送器选型流程,并就严重事故温度、压力鉴定曲线的包络性分析进行了重点探讨。经分析,福清5、6号项目所用严重事故用压力、差压变送器能够满足该项目严重事故环境条件和技术要求。  相似文献   

2.
从影响AP1000核电厂厂用电供电可靠性的诸多因素出发,阐述了AP1000核电厂厂用电的构成及电气系统的主要特点。就如何提高AP1000核电厂厂用电供电可靠性进行了较全面的分析,对AP1000核电厂厂用电设计应对严重事故工况的措施进行了探索。  相似文献   

3.
反应堆保护系统是核电厂应对预期运行事件或设计基准事故而设置的重要安全级仪控系统。为满足“华龙一号”三代核电高安全性目标的设计要求,需要对反应堆保护系统的功能性能进行提升。以“华龙一号”示范工程福清核电厂5#、6#机组为研究对象,通过充分考虑保护系统设计准则要求并基于事故分析结论,提出了更具高可靠性和全面保护功能特征的反应堆保护系统设计方案。详细介绍了系统自动保护功能的设计、系统结构设计以及系统健康管理等内容,并对系统拒动率进行了定量分析。分析结果表明,系统总体拒动率不高于5.0×10-7/指令,达到了国际主流三代核电的可靠性水平。该研究成果可为后续核电厂的反应堆保护系统设计或优化提供借鉴。  相似文献   

4.
福岛核事故后,人们逐渐意识到当严重事故发生时,事故后的缓解措施以及电厂的应急响应都非常重要,也更显现出核应急演习的必要性。核应急演习的目的就是要验证和评价应急组织的综合应急响应能力,进而检验和提高应急计划的有效性和应急准备的完善性。将严重事故演习序列与全范围模拟机自身特点相结合,通过理论分析和计算,对全厂失电叠加一回路破口事故工况堆芯的行为以及事故演习序列执行的合理性进行分析,最终得出能够满足严重事故工况应急演习需求的限制条件,给出严重事故演习序列的改进建议。  相似文献   

5.
晁侃  王鹏  蹇开任 《自动化仪表》2023,(S1):220-223
为了实现核电阀门限位开关的可靠鉴定,研究了一种针对核电厂阀门限位开关的鉴定试验方法。分析了基准试验、极限工况下试验、评价设备性能随时间变化的试验、抗震试验和严重事故试验阶段的鉴定实施方法。该方法包括不同阶段和不同工况下的试验要求,能够确保核电阀门限位开关在各种工况和时间变化下的稳定性和可靠性。该研究可为核电行业提供更安全可靠的设备,也为核电厂K1级相关仪控设备的鉴定试验提供指导和参考。同时,该研究对核电领域的安全运行和设备可靠性研究具有重要推进作用。  相似文献   

6.
福岛事故后,核电厂在地震条件下的安全性引起了广泛关注。为提升核电厂抗震防护能力,在CAP1400国核示范工程中增设了地震自动停堆系统。采用系统工程理论,从核电厂地震自动停堆系统的需求分析、要求分析、系统设计和设计验证等方面进行了详细介绍。该系统具有高可靠性,能够最大限度降低误触发和拒触发的可能性,无论对新建核电厂,还是在役核电厂,均具有较强的推广价值和应用前景。该设计方法对核电厂仪控系统的设计也具有一定的借鉴意义。  相似文献   

7.
陈松  郑明光 《计算机工程》2003,29(Z1):183-184
该文介绍了核电站严重事故仿真机MELSIM系统.它是基于服务器/客户机的仿真软件系统,可以系统性地仿真核电站严重事故现象和系统设备的响应,实现动态显示、操纵员干预、再演示等功能.并以SGTR和SBO两个事故为例,阐述了MELSIM描述事故特征、模拟操纵员干预的的能力,说明其在培训操纵员、研究和验证事故响应规程、提供事故决策工具中的作用.  相似文献   

8.
介绍基于人因工程学的核电厂主控室人机界面设计方法,以预防和减少操作中的人为失误.  相似文献   

9.
为有效跟踪核电厂瞬态事件和事故,以及监视事故后的过程状态,核电厂需在主控室房间设置专用的事故后监视系统(PAMS)。通过PAMS人机接口显示核电厂事故后参数和设备,为操作员提供监视与记录界面,尤其涉及三道安全屏障的反应性控制、反应堆堆芯冷却和一回路系统的热导出、放射性物质的相关参数和设备信息。依据核电厂安全参数显示的相关标准,结合华龙一号防城港3~#、4~#机组安全级仪控系统总体架构设计,阐述了PAMS设计和实现的过程。相较于以往硬显示的实现方案,提出了一种基于F-SC1等级的FirmSys数字化平台实现事故后监视功能的设计方案。目前,该方案已在防城港3~#机组完成现场热态调试投入实际应用,可为后续核电厂事故后监视功能提供方案借鉴与参考。  相似文献   

10.
工业控制系统是核电厂的重要基础设施。随着数字化控制系统在核电厂中应用,核电厂信息安全面临着越来越多的威胁与挑战。基于典型压水堆核电厂工业控制系统总体架构和发展现状,对核电厂控制系统的信息安全风险进行分析,介绍了防范思路与防护方法,并给出了应对的建议措施,为核电厂控制系统的设计、应用提供了参考。该研究将有效促进中国核电行业工业控制系统的健康运行和发展。  相似文献   

11.
Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained.  相似文献   

12.
European Community policy and the market   总被引:1,自引:0,他引:1  
Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.  相似文献   

13.
融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。  相似文献   

14.
Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them.  相似文献   

15.
This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives.  相似文献   

16.
Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest. This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January 31–February 2, 2008  相似文献   

17.
《计算机科学》2007,34(4):148-148
Recent years have seen rapid advances in various grid-related technologies, middleware, and applications. The GCC conference has become one of the largest scientific events worldwide in grid and cooperative computing. The 6th international conference on grid and cooperative computing (GCC2007) Sponsored by China Computer Federation (CCF),Institute of Computing Technology, Chinese Academy of Sciences (ICT) and Xinjiang University ,and in Cooperation with IEEE Computer Soceity ,is to be held from August 16 to 18, 2007 in Urumchi, Xinjiang, China.  相似文献   

18.
Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given.  相似文献   

19.
为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.  相似文献   

20.
This paper provides the author's personal views and perspectives on software process improvement. Starting with his first work on technology assessment in IBM over 20 years ago, Watts Humphrey describes the process improvement work he has been directly involved in. This includes the development of the early process assessment methods, the original design of the CMM, and the introduction of the Personal Software Process (PSP)SM and Team Software Process (TSP){SM}. In addition to describing the original motivation for this work, the author also reviews many of the problems he and his associates encountered and why they solved them the way they did. He also comments on the outstanding issues and likely directions for future work. Finally, this work has built on the experiences and contributions of many people. Mr. Humphrey only describes work that he was personally involved in and he names many of the key contributors. However, so many people have been involved in this work that a full list of the important participants would be impractical.  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号