Development of axisymmetric shell model for creep deformation analysis of reactor pressure vessel lower head
Under severe accident conditions of nuclear power plants, the lower head of a reactor pressure vessel can be at risk of creep deformation and potential failure. This study presents a computational model that can represent the creep deformation of the lower head through the application of shell theor...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-02-01
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| Series: | Nuclear Engineering and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1738573324004698 |
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| author | Jang Min Park Kukhee Lim |
| author_facet | Jang Min Park Kukhee Lim |
| author_sort | Jang Min Park |
| collection | DOAJ |
| description | Under severe accident conditions of nuclear power plants, the lower head of a reactor pressure vessel can be at risk of creep deformation and potential failure. This study presents a computational model that can represent the creep deformation of the lower head through the application of shell theory. To account for the large deformation due to creep, kinematic equations are derived and implemented. Particularly, this study provides details of the mathematical formulation, which were lacking in previous studies. The analysis results using the developed model are compared with those of finite element analysis, considering deformation history, stress distribution, and deformed shape. A dimensionless time for the creep deformation is proposed based on the results, which can characterize the effective strain at failure. Finally, the developed model is applied to OECD lower head failure test for validation. |
| format | Article |
| id | doaj-art-9a6ad9fa5336442382e84e191d539004 |
| institution | Kabale University |
| issn | 1738-5733 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Engineering and Technology |
| spelling | doaj-art-9a6ad9fa5336442382e84e191d5390042025-01-31T05:11:09ZengElsevierNuclear Engineering and Technology1738-57332025-02-01572103220Development of axisymmetric shell model for creep deformation analysis of reactor pressure vessel lower headJang Min Park0Kukhee Lim1School of Mechanical Engineering, Yeungnam University, Daehak-ro 280, Gyeongsan, 38541, Republic of Korea; Corresponding author.Korea Institute of Nuclear Safety, Daejeon, 34142, Republic of KoreaUnder severe accident conditions of nuclear power plants, the lower head of a reactor pressure vessel can be at risk of creep deformation and potential failure. This study presents a computational model that can represent the creep deformation of the lower head through the application of shell theory. To account for the large deformation due to creep, kinematic equations are derived and implemented. Particularly, this study provides details of the mathematical formulation, which were lacking in previous studies. The analysis results using the developed model are compared with those of finite element analysis, considering deformation history, stress distribution, and deformed shape. A dimensionless time for the creep deformation is proposed based on the results, which can characterize the effective strain at failure. Finally, the developed model is applied to OECD lower head failure test for validation.http://www.sciencedirect.com/science/article/pii/S1738573324004698Severe accidentReactor pressure vesselLower head failureShell theory |
| spellingShingle | Jang Min Park Kukhee Lim Development of axisymmetric shell model for creep deformation analysis of reactor pressure vessel lower head Nuclear Engineering and Technology Severe accident Reactor pressure vessel Lower head failure Shell theory |
| title | Development of axisymmetric shell model for creep deformation analysis of reactor pressure vessel lower head |
| title_full | Development of axisymmetric shell model for creep deformation analysis of reactor pressure vessel lower head |
| title_fullStr | Development of axisymmetric shell model for creep deformation analysis of reactor pressure vessel lower head |
| title_full_unstemmed | Development of axisymmetric shell model for creep deformation analysis of reactor pressure vessel lower head |
| title_short | Development of axisymmetric shell model for creep deformation analysis of reactor pressure vessel lower head |
| title_sort | development of axisymmetric shell model for creep deformation analysis of reactor pressure vessel lower head |
| topic | Severe accident Reactor pressure vessel Lower head failure Shell theory |
| url | http://www.sciencedirect.com/science/article/pii/S1738573324004698 |
| work_keys_str_mv | AT jangminpark developmentofaxisymmetricshellmodelforcreepdeformationanalysisofreactorpressurevessellowerhead AT kukheelim developmentofaxisymmetricshellmodelforcreepdeformationanalysisofreactorpressurevessellowerhead |