本文關(guān)鍵詞：三代核電站數(shù)字化系統(tǒng)共因故障的縱深防御與多樣性分析　出處：《上海交通大學》2015年碩士論文　論文類型：學位論文

  更多相關(guān)文章： 核電站 數(shù)字化系統(tǒng) 共因故障 縱深防御與多樣性 故障樹分析方法

【摘要】：核電站最早的儀控(IC)系統(tǒng)使用模擬技術(shù),由分立式IC部件組成。隨著數(shù)字化技術(shù)的不斷發(fā)展和逐漸成熟,數(shù)字化IC技術(shù)已經(jīng)在核電站得到了廣泛的應用和推廣。通常,數(shù)字化IC系統(tǒng)由硬件和軟件組成,硬件設(shè)備與早期的模擬技術(shù)設(shè)備具有相似的特性和故障類型。然而,由于軟件的應用和多個冗余序列之間軟件的交互使用導致防共因故障(CCF)的能力弱,因此核電站IC系統(tǒng)針對CCF的防御問題也隨之從硬件擴展到軟件。所以在核電站數(shù)字化系統(tǒng)設(shè)計過程中要重點關(guān)注CCF的防御以及縱深防御與多樣性(D3)防御方法的應用,尤其是對可靠性等性能指標要求更高的三代核電站更應該高度關(guān)注。本文首先針對IC系統(tǒng)中CCF進行了研究與分析,總結(jié)出了CCF的類型和形成機理,并提出了CCF所使用的D3防御方法。然后,從D3的概念、技術(shù)要求和必要性等方面對D3技術(shù)進行了研究和分析,并將D3技術(shù)應用于三代核電站數(shù)字化IC系統(tǒng)中,分析了D3的應用技術(shù),總結(jié)出數(shù)字化系統(tǒng)中D3技術(shù)的特點。進而將D3與CCF進行結(jié)合分析了三代核電站數(shù)字化系統(tǒng)中D3對于CCF的應對方式以及技術(shù)難點。最后,基于故障樹分析方法,分別對非D3系統(tǒng)和D3系統(tǒng)進行故障樹建模和計算比較,對D3針對CCF的防御和阻斷能力進行了評價和分析,發(fā)現(xiàn)D3系統(tǒng)的失效概率明顯低于非D3系統(tǒng)。通過本論文對三代核電站數(shù)字化IC系統(tǒng)CCF的D3分析,認為在三代核電站數(shù)字化IC系統(tǒng)中D3的應用可以有效的防御和降低CCF在IC系統(tǒng)中的危害和影響,D3是一種CCF防御的有效的手段,并可以在一定程度上提高全數(shù)字化IC系統(tǒng)的可靠性和安全性等實際的應用指標,提高國內(nèi)DCS平臺的設(shè)計能力,為我國早日實現(xiàn)DCS平臺國產(chǎn)化提供參考和借鑒。
[Abstract]:The earliest nuclear power plant instrument control system uses analog technology, which is composed of discrete IC parts. With the development of digital technology, it is becoming more and more mature. Digital IC technology has been widely used and popularized in nuclear power plants. Usually, digital IC system is composed of hardware and software. Hardware devices have similar characteristics and fault types to early analog technology devices. However, due to the application of software and the interactive use of software between multiple redundant sequences, the ability of CCFs to prevent common cause faults is weak. Therefore, the defense of nuclear power plant IC system against CCF also extends from hardware to software. Therefore, in the design process of digital nuclear power plant system, we should pay attention to the defense of CCF, the defense in depth and diversity (. D3) the application of defense methods. Especially for the third generation nuclear power plants which require higher reliability and other performance indicators, we should pay more attention to the third generation nuclear power plants. Firstly, the CCF in IC system is studied and analyzed, and the type and formation mechanism of CCF are summarized. The D3 defense method used by CCF is put forward. Then, the D3 technology is studied and analyzed from the concept, technical requirements and necessity of D3. The D3 technology is applied to the digital IC system of the third generation nuclear power station, and the application technology of D3 is analyzed. This paper summarizes the characteristics of D3 technology in digital system, and then combines D3 with CCF to analyze how D3 can deal with CCF and its technical difficulties in the third generation digital system of nuclear power plant. Finally. Based on the fault tree analysis method, the fault tree modeling and calculation of non-D3 system and D3 system are carried out, and the defense and blocking ability of D3 against CCF is evaluated and analyzed. It is found that the failure probability of D3 system is obviously lower than that of non-D3 system. The D3 analysis of the digital IC system CCF of the third generation nuclear power plant is carried out in this paper. It is considered that the application of D3 in the digital IC system of the third generation nuclear power station can effectively defend and reduce the harm and influence of CCF in IC system. It is an effective means of CCF defense. To some extent, it can improve the reliability and security of digital IC system, and improve the design ability of domestic DCS platform. It provides reference and reference for our country to realize the localization of DCS platform at an early date.
【學位授予單位】：上海交通大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TM623

【共引文獻】

相關(guān)期刊論文 前1條

1 劉瑞;李艷麗;;數(shù)字化核測系統(tǒng)通信數(shù)據(jù)傳輸算法應用[J];核電子學與探測技術(shù);2014年02期

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本文編號：1417638