...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of nuclear engineering and radiation science >Confluent Modeling of Heterogeneous Safety and Operational Instrumentation and Control Systems
【24h】

Confluent Modeling of Heterogeneous Safety and Operational Instrumentation and Control Systems

机译：异构安全与运营仪表和控制系统的汇合建模

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Individual systems or groups of systems related to the safety and operational instrumentation & control (I&C), and electrical systems are gradually replaced in existing nuclear power plants (NPPs) as part of modernization projects. Modernizations are usually scheduled over multiple years. Different automation platform generations and safety-related product families are deployed to progressively replace legacy systems. Typically, each of the new I&C platforms and products have their own set of engineering tools. One challenge for the modernization of installed systems is the safety and security approval of these heterogeneous systems by regulatory bodies. An NPP consists of systems manufactured by different vendors, which target different application domains, like category A according to IEC 61226 for a reactor protection system, category C for some control room data processing systems or nonclassified for auxiliary systems. Thus, replacing a legacy system by introducing a new one might bring in unknown risks, especially when the new system has more complex interfaces, e.g., when replacing an analog system by a digital system. Moreover, considering the time and budget limitations, commercial-off-the-shelf (COTS) hardware and software are also involved in modernization projects. In contrast to specialized equipment, vulnerabilities for COTS are widespread. On the other hand, existing security measures/mitigations are also required to reflect the system's changes, e.g., mitigations for known vulnerabilities of COTS systems. In order to make an overall and integrated safety analysis after a system change in the frame of a modernization project, it is necessary to jointly consider these I&C systems targeting different application domains, in addition to the physical aggregates, like sensors, pumps, and valves that interact with the physical processes. The restrictive deployment of wireless technologies may also be modeled and analyzed. While wireless is not deployed by legacy systems, it is being covered by new nuclear IEC standards, as some utilities intend to simplify selected I&C maintenance procedures that involve temporary data collection. The key modeling concepts consider new developments in the critical infrastructure and industrial automation domain. With the integrated modeling approach, different disciplines can be addressed, like probabilistic and deterministic safety analyses, security assessments, need for testing and specialized trainings.
机译：作为现代化项目的一部分，现有核电站（NPP）中与安全和运行仪表与控制（I&C）以及电气系统相关的单个系统或系统组逐渐被取代。现代化建设通常需要几年的时间。部署了不同代自动化平台和安全相关产品系列，以逐步取代传统系统。通常，每个新仪控平台和产品都有自己的一套工程工具。已安装系统现代化的一个挑战是监管机构对这些异构系统的安全和安保批准。核电站由不同供应商制造的系统组成，这些系统针对不同的应用领域，例如，根据IEC 61226，反应堆保护系统属于A类，一些控制室数据处理系统属于C类，或者辅助系统属于非类别。因此，通过引入新系统来替换旧系统可能会带来未知风险，尤其是当新系统具有更复杂的接口时，例如，当用数字系统替换模拟系统时。此外，考虑到时间和预算限制，商用现货（COTS）硬件和软件也参与了现代化项目。与专用设备相比，COTS的漏洞非常普遍。另一方面，还需要现有的安全措施/缓解措施来反映系统的变化，例如，COTS系统已知漏洞的缓解措施。为了在一个现代化项目的框架内进行系统变更之后进行全面和完整的安全性分析，除了物理聚集体，如与物理过程交互的传感器、泵和阀门之外，有必要联合考虑这些针对不同应用领域的I＆C系统。还可以对无线技术的限制性部署进行建模和分析。虽然传统系统没有部署无线，但新的核IEC标准涵盖了无线，因为一些公用事业公司打算简化涉及临时数据收集的选定仪控维护程序。关键建模概念考虑关键基础设施和工业自动化领域的新发展。通过集成建模方法，可以解决不同学科的问题，如概率和确定性安全分析、安全评估、测试需求和专业培训。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号