氧化铝纳米流体增强球形下封头IVR能力边际研究  

Marginal Research on IVR Capability of Alumina Nanofluid Enhanced Spherical Lower Head

作　　者：宋建 余红星[1] 邓坚[1] 向清安 何晓强[1] Song Jian;Yu Hongxing;Deng Jian;Xiang Qing'an;He Xiaoqiang(Science and Technology on Reactor System Design Technology Laboratory,Nuclear Power Institute of China,Chengdu,610213,China)

机构地区：[1]中国核动力研究设计院核反应堆系统设计技术重点实验室,成都610213

出　　处：《核动力工程》2022年第1期156-162,共7页Nuclear Power Engineering

摘　　要：为评价氧化铝纳米流体相对于纯水工质对球形下封头熔融物滞留(IVR)能力边际的拓展程度,采用基于气泡力平衡的氧化铝纳米流体临界热流密度(CHF)机理模型和壁面热通量拆分CHF模型计算球形下封头外表面纳米流体CHF。利用熔融物堆内滞留分析软件CISER开展衰变热分布抽样计算,得到下封头壁面CHF随倾角变化的随机分布,并将其与纳米流体CHF模型的理论值相比,以CHF比值小于1作为IVR成功准则,研判纳米流体对IVR能力边际拓展的影响程度。研究结果表明,若不对下封头内外传热构成采取任何优化措施,仅采用纳米流体替代纯水工质,压水堆核电厂的IVR能力边际能够拓展至1300 MW额定电功率水平。In order to evaluate the extent to which alumina nanofluids can extend the IVR capability of the spherical lower head relative to pure water working medium, in this paper, the critical heat flux(CHF) mechanism model of alumina nanofluid based on bubble force balance and the wall heat flux partitioning CHF model are used to calculate the CHF of nanofluid on the outer surface of spherical lower head. The decay heat distribution sampling calculation is carried out by using the IVR analysis software CISER, and the random distribution of CHF on the wall of the lower head with the inclination angle is obtained. Compared with the theoretical value of the nanofluid CHF model, the influence of nanofluid on the marginal expansion of IVR capability is studied and judged by taking the CHF ratio less than 1 as the IVR success criterion. The results show that if no optimization measures are taken for the internal and external heat transfer composition of the lower head and only nanofluid is used to replace pure water working medium,the IVR capability margin of PWR nuclear power plant can be expanded to 1300 MW rated power level.

关 键 词：汽泡力平衡 热通量拆分 临界热流密度(CHF) 熔融物堆内滞留(IVR) 能力边际 

分 类 号：TL334[核科学技术—核技术及应用]