3D Numerical Analysis of Hydraulic Deceleration Device Flow Channel of Control Rod Hydraulic Drive System

被引：0
|
作者：
Li L.-S. [1 ]
Qin B.-K. [1 ]
Bo H.-L. [1 ]
机构：
[1] Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing
来源：
Yuanzineng Kexue Jishu/Atomic Energy Science and Technology | 2017年 / 51卷 / 10期
关键词：
Computational fluid dynamics; Control rod hydraulic deceleration device; Control rod hydraulic drive system; Flow coefficient; Scram;
D O I：
10.7538/yzk.2017.51.10.1791
中图分类号：
学科分类号：
摘要：
Control rod hydraulic drive system (CRHDS), which is invented by Institute of Nuclear and New Energy Technology, Tsinghua University, is a new type of internal control rod drive technology for the nuclear heating reactor (NHR). Control rod hydraulic deceleration device (CRHDD) is one of the main components of the CRHDS. The CRHDD performs the rod dropping deceleration function to reduce the peak impact force acting upon the control rod and prevent the cruciform blade from being deformed or damaged. The working mechanism of the CRHDD was presented and analyzed. The three dimensional flow field analysis of the CRHDD flow channels was carried out using the computational fluid dynamics (CFD) program FLUENT. The relationship between the flow coefficients of the hydraulic deceleration cylinder side wall flow channel and the cushion chamber flow channel and the control rod scram displacement was obtained on the basis of the flow field analysis results, which was substituted into the theoretical rod drop model to obtain the control rod scram displacements. The theoretical results agree well with the CRHDS scram test results under room temperature which verifies the validity of the flow field analysis results. Then the model was applied to study the transient pressure inside the hydraulic deceleration cylinder and the scram speed versus the flow coefficients of the flow channels. The research results can give guidance for the design and optimization of the CRHDD. © 2017, Editorial Board of Atomic Energy Science and Technology. All right reserved.
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页码：1791 / 1799
页数：8
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