东南大学学报（自然科学版）2025，Vol.55Issue(3)：849-855,7.DOI:10.3969/j.issn.1001-0505.2025.03.027
椭球形熔融池稳态传热计算研究
Research on steady-state heat transfer calculation of ellipsoidal melt pool
摘要
Abstract
Based on the computational study of melt pool heat transfer in VVER-1000 under severe accidents,a steady-state heat transfer model of melt retention inside the ellipsoidal lower head pressure vessel was estab-lished.The wall heat flux at each place of the ellipsoidal lower headwall,the thickness of the oxide crust formed by the liquid-phase oxidic layer being cooled and solidified,the residual wall thickness of the pressure vessel,and the failure of the pressure vessel were computed and analyzed.The calculation results show that the heat flux at the bottom of the ellipsoidal pressure vessel lower head is the smallest,and an obvious heat-focusing effect is observed in the metal layer.The thickness of the oxidic crust decreases with the increase of the axial height of the ellipsoidal melt pool.The higher the volumetric heat release rate of the oxidic pool,the smaller the thickness of the oxidic crust.The wall of the pressure vessel starts to melt at a certain place of the lower head.The wall thickness decreases with the increase of heat flux.The ablation of the pressure vessel wall increases to the maximum value due to the drastic increase of heat flux in the metal layer area.The thinner the metal layer,the smaller the wall thickness of the pressure vessel in contact with the metal layer,and the greater the failure probability of the pressure vessel.Therefore,the wall surface of the pressure vessel in con-tact with the metal layer is the most dangerous position in the case of a serious accident.关键词
下封头/椭球形熔融池/热流密度/压力容器失效/堆内熔融物滞留Key words
lower head/ellipsoidal melt pool/heat flux/pressure vessel failure/in-vessel melt retention(IVR)分类
能源科技引用本文复制引用
周涛,刘鹏,顿世雷,白宗艳,付有缘..椭球形熔融池稳态传热计算研究[J].东南大学学报（自然科学版）,2025,55(3):849-855,7.基金项目
国防科技工业核动力技术创新中心资助项目(HDLCXZX-2022-HD-010-01) （HDLCXZX-2022-HD-010-01）
江苏省双创人才经费资助项目(JSSCRC2021500). （JSSCRC2021500）
