第35卷第3期 2015年9月
核科学与工程
Nuclear Science and Engineering
驱动杆位置对控制棒驱动机构
轴向传热特性的影响
张升，顾汉洋（上海交通大学，上海200240）
Vol.35No.3
Sep.2015
摘要：核电站常采用对控制梯驱动机构(CRDM)外部强制通风冷却的方法来确保其正常运行。CRDM 外部的通风冷却会引起内部的热虹吸现象，从而导致CRDM轴向温度升高，研究表明，驱动杆插人 CRDM中的不同位置是影响热虹吸现象的重要因素之一。本文通过试验研究了多种风速下驱动杆在全高度棒位和半高度棒位时CRDM的轴向温度分布。结果表明，驱动杆在全高度棒位时CRDM内部
的热虹吸现象更剧烈，冷却空气带走的热量更多。关键调：控制棒驱动机构；驱动杆；热虹吸；试验研究
中图分类号：TL35
文献标志码：A
文章编号：0258-0918(2015)03-0439-06
The Effect of Drive Rod's Location on the Axial Heat Transfer of CRDM
ZHANG Sheng, GU Han-yang
(Shanghai Jiao Tong University, Shanghai 200240, China)
Abstract: The control rod drive mechanism (CRDM) in nuclear power plant is usually cooled by outside forced ventilation to make sure it works properly. The forced ventilation outside the CRDM will lead to thermosyphon phenomenon inside the CRDM which results in the temperature rising along the axial direction of the CRDM. It was reported that the location of the drive rod is one of the most important factors which affect the thermosyphon phenomenon. In this study, the effect of the drive rod's location on the axial heat transfer of CRDM is investigated experimentally through measuring the axial temperature distribution of the CRDM under various ventilation speeds when the drive rod locates at both full height and half height of the CRDM, The experimental results show that the thermosyphon phenomenon is intensified for the full height condition comparing with the half height condition and more cooling capacity is achieved under the same ventilation condition.
Key words: CRDM; drive rod; thermosyphon; experimental study 收稿日期：2013-12-27，修回日期：2014-09-25
（686
439