
第36卷
第2期
2016年
4月
核科学与工程
Nuclear Science and Engineering
Vol.36No.2
Apr.2016
全厂断电时安全壳直接加热的概率研究
陈阳丽,彭常宏,郭赞
(中国科学技术大学核科学技术学院,安徽合肥230027)
摘要:安全壳直接加热(DCH)是导致安全壳早期失效的潜在因索,本文应用基于风险导向的事故分析方法(ROAAM),对堆芯碎片中UO的质量和Zr的氧化份额的概率密度分布抽样,对安全壳直接加热模型TCE(Two-cellEquilibrium)编程,将抽样结果带人TCE模型中计算,得到安全壳压力峰值的累积概率分布和安全壳失效概率,研究压水堆全厂断电始发事故下轴封破口面积不同的情况对下封头失效
后安全壳压力峰值的影响。其中TCE模型的输人数据由严重事故分析程序计算给出。关键词:安全壳直接加热;安全壳失效概率;ROAAM;TCE模型
中图分类号:TL364十.4
文章标志码:A
文章编号:0258-0918(2016)02-0172-06
Study oncontainment directheatingprobability in stationblackout
CHENYang-li,PENG Chang-hong,GUOYun
(School of Nuclear Science and Technology, University of Science and Technology of China,
Hefei of Anhui Prov, 230027, China)
Abstract: Containment direct heating (DCH) is a potential factor which may cause early failure of containment.In this paper,containment peak pressure and containment failure probability in DCH process are assessed by Risk-Oriented Accident Analysis Methodology (ROAAM) using Two-Cell Equilibrium (TCE) model. The influence of the diameter length of seal-LOCA in Station Blackout (SBO) in reference plant is also analyzed. In ROAAM, probability distribution for Zirconium oxidation fraction and UO mass in core debris are sampled to calculate as part of the input data of TCE model. The other part of the input data of the TCE model is given by severe accident analysis program.
Key words:Containment direct heating;Containment failure probability;ROAAM; TCE model
安全壳直接加热是导致安全壳早期失效的潜在因素,也是严重事故的重要过程。在压水堆修回日期:2014-02-17
严重事故中,压力容器下封头失效时,若一回路已处于持续高压状态,堆芯碎片和一回路的气体
作者简介:陈阳丽(1992-),女,满族,宁人,中国科学技术大学核科学技术学院硕士生,现主要从事反应堆热工与安全研究 172