核级仪控平台软件失效验证研究与实践

随着数字化的兴起,核电厂的数字化产品承担越来越多的功能,软件故障的频繁发生,对系统的安全运行产生危害增大,从而使人们逐渐认识到软件可靠性的重要性。由于软件具有抽象、无形等特点,软件可靠性验证成为软件验证难点。采用软件失效模式和影响分析(FMEA)方法,在核安全级产品的全生命周期验证中,系统性识别核安全级产品的安全薄弱环节,分析和测试处理措施合理性。同时,提出了从硬件故障、功能异常、工作约束等维度创建失效模式库,化解软件FMEA工作量大的问题。通过对核安全级产品执行软件FMEA分析和测试,促使安全设计以消除薄弱环节或使其影响减小,从而达到提高产品可靠性的目的。同时,该研究为软件可靠性验证提供有效验证手段。

软件FMEA在核级仪控系统平台(和睦系统)中的研究与实践

软件失效模式和影响分析(软件FMEA)是一种系统化的自下而上可靠性分析方法,本文阐述软件FMEA在和睦系统作用、策略、方法、实施过程、总结,通过对和睦系统软件功能单元潜在的各种失效模式及其对系统功能的影响分析,提出存在的风险或异常,以提高和睦系统软件的可靠性。

汽车零部件供应商过程审核方法创新

本文介绍了汽车零部件供应商过程审核的一些创新方法，该方法从整车厂角度对零部件供应商过程审核经验总结而出；审核方法主要从审核准备、审核执行及审核问题改进三方面进行阐述。

Probability of Failure Assessment in District Heating Network

The aim of this paper is to present works performed in HTC （Heat-Tech Center）, Research ＆ Development Centre of Veolia Group located in Warsaw regarding assessment of probability of failure in DHN （district heating network）. This work is a part of a project dedicated to develop a software which objective is to increase reliability of DHN. The research methods consisted of three approaches. First, using database of failures which happened in Warsaw DHN and repairing protocols from past 10 years, a statistics approach was applied to perform first analysis. The result was that pipelines with nominal diameter DN （nominal diameter） ≤ 150 had higher failure rate per km, than pipelines with DN 〉 150. The next step of research was to study influence of internal （corrosion caused by heat carrier, quality of materials） and external （stray currents） factor in order to assess its individual influence on failure rate of pipe and explain reasons of differences in failure rate. To end a FMEA （failure mode and＇effects analysis） will aim to identify the main failures modes appearing on DHN, to estimate the main causes of these failures and to propose the best solutions regarding the causes, the costs and the means available.