Evaluation of availability of nuclear power plant dynamic systems using extended dynamic reliability graph with general gates (DRGGG)
To assess the availability of a nuclear power plant’s dynamic systems, it is necessary to consider the impact of dynamic interactions, such as components, software, and operating processes. However, there is currently no simple, easy-to-use tool for assessing the availability of these dynamic system...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2019-04-01
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| Series: | Nuclear Engineering and Technology |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1738573318303425 |
| _version_ | 1818538874180206592 |
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| author | Eun Chan Lee Seung Ki Shin Poong Hyun Seong |
| author_facet | Eun Chan Lee Seung Ki Shin Poong Hyun Seong |
| author_sort | Eun Chan Lee |
| collection | DOAJ |
| description | To assess the availability of a nuclear power plant’s dynamic systems, it is necessary to consider the impact of dynamic interactions, such as components, software, and operating processes. However, there is currently no simple, easy-to-use tool for assessing the availability of these dynamic systems. The existing method, such as Markov chains, derives an accurate solution but has difficulty in modeling the system. When using conventional fault trees, the reliability of a system with dynamic characteristics cannot be evaluated accurately because the fault trees consider reliability of a specific operating configuration of the system. The dynamic reliability graph with general gates (DRGGG) allows an intuitive modeling similar to the actual system configuration, which can reduce the human errors that can occur during modeling of the target system. However, because the current DRGGG is able to evaluate the dynamic system in terms of only reliability without repair, a new evaluation method that can calculate the availability of the dynamic system with repair is proposed through this study. The proposed method extends the DRGGG by adding the repair condition to the dynamic gates. As a result of comparing the proposed method with Markov chains regarding a simple verification model, it is confirmed that the quantified value converges to the solution. Keywords: Dynamic system availability, Reliability graph with general gates, Extended dynamic gates |
| first_indexed | 2024-12-11T21:34:37Z |
| format | Article |
| id | doaj.art-07ce9acf30754a93a1800d9a842c0e40 |
| institution | Directory Open Access Journal |
| issn | 1738-5733 |
| language | English |
| last_indexed | 2024-12-11T21:34:37Z |
| publishDate | 2019-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Engineering and Technology |
| spelling | doaj.art-07ce9acf30754a93a1800d9a842c0e402022-12-22T00:50:02ZengElsevierNuclear Engineering and Technology1738-57332019-04-01512444452Evaluation of availability of nuclear power plant dynamic systems using extended dynamic reliability graph with general gates (DRGGG)Eun Chan Lee0Seung Ki Shin1Poong Hyun Seong2Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology, 373-1, Guseong-dong, Yuseong-gu, Daejeon, 305-701, Republic of Korea; Corresponding author.Research Reactor System Design Div, Korea Atomic Energy Research Institute, 150-1, Dukjin-dong, Yuseong-gu, Daejeon, 305-353, Republic of KoreaDepartment of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology, 373-1, Guseong-dong, Yuseong-gu, Daejeon, 305-701, Republic of KoreaTo assess the availability of a nuclear power plant’s dynamic systems, it is necessary to consider the impact of dynamic interactions, such as components, software, and operating processes. However, there is currently no simple, easy-to-use tool for assessing the availability of these dynamic systems. The existing method, such as Markov chains, derives an accurate solution but has difficulty in modeling the system. When using conventional fault trees, the reliability of a system with dynamic characteristics cannot be evaluated accurately because the fault trees consider reliability of a specific operating configuration of the system. The dynamic reliability graph with general gates (DRGGG) allows an intuitive modeling similar to the actual system configuration, which can reduce the human errors that can occur during modeling of the target system. However, because the current DRGGG is able to evaluate the dynamic system in terms of only reliability without repair, a new evaluation method that can calculate the availability of the dynamic system with repair is proposed through this study. The proposed method extends the DRGGG by adding the repair condition to the dynamic gates. As a result of comparing the proposed method with Markov chains regarding a simple verification model, it is confirmed that the quantified value converges to the solution. Keywords: Dynamic system availability, Reliability graph with general gates, Extended dynamic gateshttp://www.sciencedirect.com/science/article/pii/S1738573318303425 |
| spellingShingle | Eun Chan Lee Seung Ki Shin Poong Hyun Seong Evaluation of availability of nuclear power plant dynamic systems using extended dynamic reliability graph with general gates (DRGGG) Nuclear Engineering and Technology |
| title | Evaluation of availability of nuclear power plant dynamic systems using extended dynamic reliability graph with general gates (DRGGG) |
| title_full | Evaluation of availability of nuclear power plant dynamic systems using extended dynamic reliability graph with general gates (DRGGG) |
| title_fullStr | Evaluation of availability of nuclear power plant dynamic systems using extended dynamic reliability graph with general gates (DRGGG) |
| title_full_unstemmed | Evaluation of availability of nuclear power plant dynamic systems using extended dynamic reliability graph with general gates (DRGGG) |
| title_short | Evaluation of availability of nuclear power plant dynamic systems using extended dynamic reliability graph with general gates (DRGGG) |
| title_sort | evaluation of availability of nuclear power plant dynamic systems using extended dynamic reliability graph with general gates drggg |
| url | http://www.sciencedirect.com/science/article/pii/S1738573318303425 |
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