蒸汽发生器二次侧下部流场与排污试验  

Flow Field and Blowdown Test of Secondary Side Lower Part of Steam Generator

作　　者：黄俊[1] 应秉斌[1] 郑明光[1] Huang Jun;Ying Bingbin;Zheng Mingguang(Shanghai Nuclear Engineering Research and Design Institute Co.,Ltd.,Shanghai,200233,China)

机构地区：[1]上海核工程研究设计院股份有限公司,上海200233

出　　处：《核动力工程》2024年第2期193-198,共6页Nuclear Power Engineering

基　　金：国家科技重大专项CAP1400工程设计验证与相关试验项目(2014ZX06002005)。

摘　　要：位于核电厂蒸汽发生器(SG)管板内的下部排污结构能吸出管板二次侧表面的泥渣并将其排出。为了能合理设计该排污结构并提升排污效率,本文基于非能动大型先进压水堆(CAP1400)的SG设计原型结构,按照1∶4比例设计了排污试验体,以模拟SG下部的管板、传热管等部件。通过对下部流场进行计算流体动力学(CFD)计算并与排污试验的结果进行对比,进一步掌握近管板表面区域的流体流动特征。本试验通过研究SG近管板区域流体流动特征及泥渣分布规律、测量试验体各部件压降、对比SG单边和双边排污结构的设计,为减少淤泥集结、改进设计提供依据。研究发现,单/双边排污结构排污性能基本相同,单边排污结构即可将试验体内泥渣颗粒有效排出。The lower blowdown structure located in the tubesheet of steam generator(SG)in nuclear power plant can suck out the sludge on the tubesheet secondary side surface and discharge it.In order to reasonably design this structure and improve the blowdown efficiency,based on the SG prototype structure of passive large-scale advanced pressurized water reactor(CAP1400),a blowdown test piece was designed according to the ratio of 1:4 to simulate the tubesheet,heat transfer tube and other components at the lower part of SG.Computational fluid dynamics(CFD)calculation was carried out for the lower flow field,and the results were compared with those of the blowdown test.The fluid flow characteristics near the tube sheet surface were obtained.This test provides a basis for reducing sludge accumulation and improving the design by studying the fluid flow characteristics and sludge distribution law near SG tube plate,measuring the pressure drop of each part of the test piece and comparing the design of SG single-side and double-side blowdown structures.It is found that the performance of single/double-side blowdown structure is basically the same,and the single-side blowdown structure can effectively discharge the sludge particles in the test piece.

关 键 词：蒸汽发生器(SG) 下部流场 排污试验 

分 类 号：TL353.13[核科学技术—核技术及应用]