Reliability numerical simulation for startup time and startup failure of cold redundancy system in nuclear power plant
BackgroundThe startup time and startup-failure are widespread in most cold redundancy equipment of nuclear power plants (NPPs). The traditional static and dynamic fault tree cannot accurately model the startup time and startup-failure.PurposeThis study aims to model the startup time and startup-fail...
Main Authors: | , , , , |
---|---|
Format: | Article |
Language: | zho |
Published: |
Science Press
2022-12-01
|
Series: | He jishu |
Subjects: | |
Online Access: | https://www.hjs.sinap.ac.cn/thesisDetails#10.11889/j.0253-3219.2022.hjs.45.120604&lang=zh |
_version_ | 1811169637523521536 |
---|---|
author | WANG Shaoxuan LIN Zhixian GE Daochuan WU Jie YU Jie |
author_facet | WANG Shaoxuan LIN Zhixian GE Daochuan WU Jie YU Jie |
author_sort | WANG Shaoxuan |
collection | DOAJ |
description | BackgroundThe startup time and startup-failure are widespread in most cold redundancy equipment of nuclear power plants (NPPs). The traditional static and dynamic fault tree cannot accurately model the startup time and startup-failure.PurposeThis study aims to model the startup time and startup-failure behaviors in cold redundancy systems, and provide suggestions for the improvement of reliability assessment methods.MethodsFirst, a DFT Monte Carlo simulation method was proposed for modeling and analyzing equipment's startup time and startup-failure behaviors in a cold redundancy system. Then, the emergency diesel generator set of the nuclear power plant was taken as an example, the distribution curve of system failure probability and the sensitivity of each component were obtained. Finally, the results were compared with the static fault tree method and traditional DFT method.Results1) The proposed method can model and analyze the start-up time and start-up failure behaviors of cold redundant equipment, reflecting the real failure scenarios and actual operation status of cold redundant systems. 2) The proposed method can accurately evaluate the system failure probability, identify highly sensitive equipment parameters in different time periods, and analyze the influence of start-up time on the system failure probability.ConclusionsThe proposed method has certain theoretical significance for the optimal design of NPP's cold redundancy systems. |
first_indexed | 2024-04-10T16:45:35Z |
format | Article |
id | doaj.art-8d38e48eecac4330b86dba1ffce9e179 |
institution | Directory Open Access Journal |
issn | 0253-3219 |
language | zho |
last_indexed | 2024-04-10T16:45:35Z |
publishDate | 2022-12-01 |
publisher | Science Press |
record_format | Article |
series | He jishu |
spelling | doaj.art-8d38e48eecac4330b86dba1ffce9e1792023-02-08T01:05:18ZzhoScience PressHe jishu0253-32192022-12-01451212060412060410.11889/j.0253-3219.2022.hjs.45.1206040253-3219(2022)12-0083-10Reliability numerical simulation for startup time and startup failure of cold redundancy system in nuclear power plantWANG Shaoxuan0LIN Zhixian1GE Daochuan2WU Jie3YU Jie4Institute of Nuclear Energy Safety Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, ChinaInstitute of Nuclear Energy Safety Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, ChinaInstitute of Nuclear Energy Safety Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, ChinaInstitute of Nuclear Energy Safety Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, ChinaInstitute of Nuclear Energy Safety Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, ChinaBackgroundThe startup time and startup-failure are widespread in most cold redundancy equipment of nuclear power plants (NPPs). The traditional static and dynamic fault tree cannot accurately model the startup time and startup-failure.PurposeThis study aims to model the startup time and startup-failure behaviors in cold redundancy systems, and provide suggestions for the improvement of reliability assessment methods.MethodsFirst, a DFT Monte Carlo simulation method was proposed for modeling and analyzing equipment's startup time and startup-failure behaviors in a cold redundancy system. Then, the emergency diesel generator set of the nuclear power plant was taken as an example, the distribution curve of system failure probability and the sensitivity of each component were obtained. Finally, the results were compared with the static fault tree method and traditional DFT method.Results1) The proposed method can model and analyze the start-up time and start-up failure behaviors of cold redundant equipment, reflecting the real failure scenarios and actual operation status of cold redundant systems. 2) The proposed method can accurately evaluate the system failure probability, identify highly sensitive equipment parameters in different time periods, and analyze the influence of start-up time on the system failure probability.ConclusionsThe proposed method has certain theoretical significance for the optimal design of NPP's cold redundancy systems.https://www.hjs.sinap.ac.cn/thesisDetails#10.11889/j.0253-3219.2022.hjs.45.120604&lang=zhstartup failuredynamic fault treenuclear power plantcold redundancyreliability |
spellingShingle | WANG Shaoxuan LIN Zhixian GE Daochuan WU Jie YU Jie Reliability numerical simulation for startup time and startup failure of cold redundancy system in nuclear power plant He jishu startup failure dynamic fault tree nuclear power plant cold redundancy reliability |
title | Reliability numerical simulation for startup time and startup failure of cold redundancy system in nuclear power plant |
title_full | Reliability numerical simulation for startup time and startup failure of cold redundancy system in nuclear power plant |
title_fullStr | Reliability numerical simulation for startup time and startup failure of cold redundancy system in nuclear power plant |
title_full_unstemmed | Reliability numerical simulation for startup time and startup failure of cold redundancy system in nuclear power plant |
title_short | Reliability numerical simulation for startup time and startup failure of cold redundancy system in nuclear power plant |
title_sort | reliability numerical simulation for startup time and startup failure of cold redundancy system in nuclear power plant |
topic | startup failure dynamic fault tree nuclear power plant cold redundancy reliability |
url | https://www.hjs.sinap.ac.cn/thesisDetails#10.11889/j.0253-3219.2022.hjs.45.120604&lang=zh |
work_keys_str_mv | AT wangshaoxuan reliabilitynumericalsimulationforstartuptimeandstartupfailureofcoldredundancysysteminnuclearpowerplant AT linzhixian reliabilitynumericalsimulationforstartuptimeandstartupfailureofcoldredundancysysteminnuclearpowerplant AT gedaochuan reliabilitynumericalsimulationforstartuptimeandstartupfailureofcoldredundancysysteminnuclearpowerplant AT wujie reliabilitynumericalsimulationforstartuptimeandstartupfailureofcoldredundancysysteminnuclearpowerplant AT yujie reliabilitynumericalsimulationforstartuptimeandstartupfailureofcoldredundancysysteminnuclearpowerplant |