原子能科学技术2012，Vol.46Issue(z1)：283-289,7.
福岛核电厂3号机组严重事故模拟分析
Severe Accident Simulation and Analysis for Fukushima NPS Unit 3
陈耀东 1周拥辉 2石俊英 3柴国旱3
作者信息
- 1. 国核科学技术研究院,北京100029
- 2. 苏州热工研究院有限公司,江苏苏州 215004
- 3. 环境保护部核与辐射安全中心,北京 100082
- 折叠
摘要
Abstract
In the paper the simulation of severe accident progression within first 3 days for Fukushima Daiichi NPP unit 3 was performed with application of MELCOR code. The detailed modeling of the whole plant system was made to achieve it. The resulted parameters were compared with those monitored. The major physical phenomena from the accident initiation to reactor core degradation until hydrogen explosion were reproduced in simulation. The simulation results based on assumption as defined agree well with those measured. The results indicate that the reactor water level drops down to top of core active part at 36 h since the earthquake. Operators fail to depressurize the containment and reactor at an earlier time, by the time water injection into reactor through fire pump, the core claddings are already severely oxidized, and ruptures of claddings bring up release of volatile fission product at 40. 7 h. Suspended supply of fire pump water (55. 5-63. 2 h) leads to further degradation and relocation of core materials. Upon slumping of debris into lower plenum, more H2 from Zr-water (or metal-water) reaction releases and accumulates over upper space of reactor building, finally results in H2 detonation; up to 72 h,around 50% of zircalloy is oxidized, and the lower head of RPV is intact from rupture.关键词
福岛/锆水反应/堆芯失效/氢爆Key words
Fukushima NPS/ Zr-water reaction/ core degradation/ H2 detonation分类
能源科技引用本文复制引用
陈耀东,周拥辉,石俊英,柴国旱..福岛核电厂3号机组严重事故模拟分析[J].原子能科学技术,2012,46(z1):283-289,7.
