Analysis of Precooling Injection Transient of Steam Generator for High Temperature Gas Cooled Reactor
After a postulated design basis accident leads high temperature gas cooled reactor to emergency shutdown, steam generator still remains with high temperature level and needs to be cooled down by a precooling before reactor restarts with clearing of fault. For the large difference of coolant temperat...
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| Format: | Article |
| Language: | English |
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Wiley
2017-01-01
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| Series: | Science and Technology of Nuclear Installations |
| Online Access: | http://dx.doi.org/10.1155/2017/8521410 |
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| author | Yan Wang Lei Shi Yanhua Zheng |
| author_facet | Yan Wang Lei Shi Yanhua Zheng |
| author_sort | Yan Wang |
| collection | DOAJ |
| description | After a postulated design basis accident leads high temperature gas cooled reactor to emergency shutdown, steam generator still remains with high temperature level and needs to be cooled down by a precooling before reactor restarts with clearing of fault. For the large difference of coolant temperature between inlet and outlet of steam generator in normal operation, the temperature distribution on the components of steam generator is very complicated. Therefore, the temperature descending rate of the components in steam generator needs to be limited to avoid the potential damage during the precooling stage. In this paper, a pebble-bed high temperature gas cooled reactor is modeled by thermal-hydraulic system analysis code and several postulated precooling injection transients are simulated and compared to evaluate their effects, which will provide support for the precooling design. The analysis results show that enough precooling injection is necessary to satisfy the precooling requirements, and larger mass flow rate of precooling water injection will accelerate the precooling process. The temperature decrease of steam generator is related to the precooling injection scenarios, and the maximal mass flow rate of the precooling injection should be limited to avoid the excessively quick temperature change of the structures in steam generator. |
| format | Article |
| id | doaj-art-034f7edd125a4914a349ea2e7b728c6b |
| institution | Kabale University |
| issn | 1687-6075 1687-6083 |
| language | English |
| publishDate | 2017-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Science and Technology of Nuclear Installations |
| spelling | doaj-art-034f7edd125a4914a349ea2e7b728c6b2025-02-03T01:23:22ZengWileyScience and Technology of Nuclear Installations1687-60751687-60832017-01-01201710.1155/2017/85214108521410Analysis of Precooling Injection Transient of Steam Generator for High Temperature Gas Cooled ReactorYan Wang0Lei Shi1Yanhua Zheng2Institute of Nuclear and New Energy Technology, Tsinghua University, Collaborative Innovation Centre of Advanced Nuclear Energy Technology, Key Laboratory of Advanced Reactor Engineering and Safety, Ministry of Education, Beijing 100084, ChinaInstitute of Nuclear and New Energy Technology, Tsinghua University, Collaborative Innovation Centre of Advanced Nuclear Energy Technology, Key Laboratory of Advanced Reactor Engineering and Safety, Ministry of Education, Beijing 100084, ChinaInstitute of Nuclear and New Energy Technology, Tsinghua University, Collaborative Innovation Centre of Advanced Nuclear Energy Technology, Key Laboratory of Advanced Reactor Engineering and Safety, Ministry of Education, Beijing 100084, ChinaAfter a postulated design basis accident leads high temperature gas cooled reactor to emergency shutdown, steam generator still remains with high temperature level and needs to be cooled down by a precooling before reactor restarts with clearing of fault. For the large difference of coolant temperature between inlet and outlet of steam generator in normal operation, the temperature distribution on the components of steam generator is very complicated. Therefore, the temperature descending rate of the components in steam generator needs to be limited to avoid the potential damage during the precooling stage. In this paper, a pebble-bed high temperature gas cooled reactor is modeled by thermal-hydraulic system analysis code and several postulated precooling injection transients are simulated and compared to evaluate their effects, which will provide support for the precooling design. The analysis results show that enough precooling injection is necessary to satisfy the precooling requirements, and larger mass flow rate of precooling water injection will accelerate the precooling process. The temperature decrease of steam generator is related to the precooling injection scenarios, and the maximal mass flow rate of the precooling injection should be limited to avoid the excessively quick temperature change of the structures in steam generator.http://dx.doi.org/10.1155/2017/8521410 |
| spellingShingle | Yan Wang Lei Shi Yanhua Zheng Analysis of Precooling Injection Transient of Steam Generator for High Temperature Gas Cooled Reactor Science and Technology of Nuclear Installations |
| title | Analysis of Precooling Injection Transient of Steam Generator for High Temperature Gas Cooled Reactor |
| title_full | Analysis of Precooling Injection Transient of Steam Generator for High Temperature Gas Cooled Reactor |
| title_fullStr | Analysis of Precooling Injection Transient of Steam Generator for High Temperature Gas Cooled Reactor |
| title_full_unstemmed | Analysis of Precooling Injection Transient of Steam Generator for High Temperature Gas Cooled Reactor |
| title_short | Analysis of Precooling Injection Transient of Steam Generator for High Temperature Gas Cooled Reactor |
| title_sort | analysis of precooling injection transient of steam generator for high temperature gas cooled reactor |
| url | http://dx.doi.org/10.1155/2017/8521410 |
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