TY - GEN
T1 - Application of Lower Head Thermal-mechanical Creep Failure Module in LHF Experiment
AU - Yang, Hao
AU - Zhang, Bin
AU - Gao, Pengcheng
AU - Shan, Jianqiang
N1 - Publisher Copyright:
© 2023 Proceedings of the 20th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, NURETH 2023. All rights reserved.
PY - 2023
Y1 - 2023
N2 - Under severe accident conditions, the core is melted due to insufficient cooling, and a large amount of molten material is relocated to the lower plenum of the Reactor Pressure Vessel (RPV), which may lead to the rupture of the lower head and radioactive release. As the second line of defense, the integrity of the lower head of the RPV plays an exceedingly significant role. Whether the lower head can ensure the retention of molten materials is of great significance to the safety analysis of the reactor. Therefore, in order to better evaluate the integrity of the lower head, it is necessary to mak e an in-depth analysis of the lower head. In this paper, the LHTCF (Lower Head Thermal-me chanical Creep Failure) module is developed based on the method of thermal-mechanical coup ling. Finally, the LHTCF module is integrated into the severe accident analysis program ISAA (Integrated Severe Accident Analysis) to simulate the LHF-1 (lower head failure, LHF) experiment. The numerical simulation results agree well with the experimental data. The findings reveal that the LHTCF model established in this paper can effectively predict the mechanical behavior of the lower head.
AB - Under severe accident conditions, the core is melted due to insufficient cooling, and a large amount of molten material is relocated to the lower plenum of the Reactor Pressure Vessel (RPV), which may lead to the rupture of the lower head and radioactive release. As the second line of defense, the integrity of the lower head of the RPV plays an exceedingly significant role. Whether the lower head can ensure the retention of molten materials is of great significance to the safety analysis of the reactor. Therefore, in order to better evaluate the integrity of the lower head, it is necessary to mak e an in-depth analysis of the lower head. In this paper, the LHTCF (Lower Head Thermal-me chanical Creep Failure) module is developed based on the method of thermal-mechanical coup ling. Finally, the LHTCF module is integrated into the severe accident analysis program ISAA (Integrated Severe Accident Analysis) to simulate the LHF-1 (lower head failure, LHF) experiment. The numerical simulation results agree well with the experimental data. The findings reveal that the LHTCF model established in this paper can effectively predict the mechanical behavior of the lower head.
KW - LHF-1 experiment
KW - Lower head
KW - Mechanical analysis
KW - Severe accident
UR - https://www.scopus.com/pages/publications/85202959268
U2 - 10.13182/NURETH20-40553
DO - 10.13182/NURETH20-40553
M3 - 会议稿件
AN - SCOPUS:85202959268
T3 - Proceedings of the 20th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, NURETH 2023
SP - 4364
EP - 4379
BT - Proceedings of the 20th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, NURETH 2023
PB - American Nuclear Society
T2 - 20th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, NURETH 2023
Y2 - 20 August 2023 through 25 August 2023
ER -