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Received:March 23, 2015
Received:March 23, 2015
中文摘要: 以AP1000核电机组反应堆偏离泡核沸腾比(DNBR)特性为研究对象.针对该反应堆堆芯功率与原型反应堆相比增加较为明显的状况,利用Matlab软件进行了DNBR的计算,并与原型反应堆进行了对比分析.计算结果表明:DNBR与临界热流密度(CHF)不是单纯的线性关系,而是随着轴向距离的增大,先减小后增大;各工况负荷情况的DNBR值均大于原型反应堆的对应值,AP1000反应堆运行安全特性明显高于常规核电机组反应堆;反应堆运行在高功率下的DNBR值明显大于运行在低功率下的DNBR值,反应性引入事故下,堆芯核功率的突然增加容易造成偏离泡核沸腾(DNB);质量流密度、含汽率、压力及进口欠热度等因素均对CHF产生影响,进而影响到DNBR值.
Abstract:The characteristics of AP1000 nuclear power reactor departure from nucleate boiling ratio(DNBR) are studied. The reactor core nuclear power increases obviously compared with the prototype reactor, the DNBR is calculated using MATLAB software, and the result is compared with the prototype reactor. The calculation results show that the DNBR and critical heat flux(CHF) density is not of a simple linear relationship, with the increase of the axial distance decreasing first and then increasing. AP1000 DNBR is greater than the prototype reactor under every load conditions, and the security characteristics of AP1000 reactor is significantly higher. The high power DNBR is significantly higher than that of low power. Under the reactor insertion accidents, nuclear power sudden increase is likely to cause departure from nucleate boiling(DNB). The mass flow density, void fraction, pressure and inlet subcooling can affect the CHF which affects the value of DNBR.
文章编号：20150601 中图分类号： 文献标志码：
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