Flow distribution plate design of molten salt reactor based on pebble bed dense experiment facility

Mudan MEI; Dafu LIN; Xingwei CHEN; Rui YAN; Minghai LI; Yang ZOU

doi:10.11889/j.0253-3219.2017.hjs.40.040605

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Flow distribution plate design of molten salt reactor based on pebble bed dense experiment facility

NUCLEAR ENERGY SCIENCE AND ENGINEERING | 更新时间：2021-05-19

- Flow distribution plate design of molten salt reactor based on pebble bed dense experiment facility
- NUCLEAR TECHNIQUES Vol. 40, Issue 4, Article number: 040605(2017)
- 作者机构：
  
  中国科学院上海应用物理研究所嘉定园区上海 201800
- 作者简介：
- 基金信息：
  
  Strategic Priority Program of Chinese Academy of Sciences
- DOI：10.11889/j.0253-3219.2017.hjs.40.040605
  CLC： TL334
- Received：03 November 2016，
  
  Revised：26 December 2016，
  
  Published：10 April 2017
- 稿件说明：
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Mudan MEI, Dafu LIN, Xingwei CHEN, et al. Flow distribution plate design of molten salt reactor based on pebble bed dense experiment facility[J]. Nuclear techniques, 2017, 40(4): 040605
DOI：

Mudan MEI, Dafu LIN, Xingwei CHEN, et al. Flow distribution plate design of molten salt reactor based on pebble bed dense experiment facility[J]. Nuclear techniques, 2017, 40(4): 040605 DOI： 10.11889/j.0253-3219.2017.hjs.40.040605.

摘要

在熔盐球床堆设计中，为实现堆芯内部燃料球堆积结构的稳定性，需保证堆芯内部的流场均匀分布。研究基于模拟熔盐球床堆堆芯水力特性的球床密实实验装置（Pebble bed dense experiment facility，PBDE），通过设计不同形状和不同孔道分布的分流板，运用计算流体力学（Computational fluid dynamics，CFD）方法使用FLUENT软件对其堆芯内部的流场分布进行数值模拟，目的是保证实验中堆芯的流场分布均匀稳定。模拟结果表明，平板形分流板较锥形分流板能更好地使堆芯内流场均匀分布；且增加分流板的孔道数目或减小孔径能使堆芯内部的流场更加均匀稳定；比较设计的6种分流板模拟结果，最终给出满足PBDE堆芯流场均匀分布的分流板，为PBDE实验提供了基础，也为熔盐球床堆的堆芯流量分配设计提供技术方案与选型参考。

Abstract

Background

Molten salt pebble-bed reactor is one of the six generation Ⅳ reactor types

and is a new reactor

in the thermal-hydraulic design of pebble bed dense experiment facility (PBDE) of molten salt reactor

the uniform flow field distribution of the core is the prerequisites of the experiment

and the distribution plate plays a decisive role in the flow filed distribution of the core.

Purpose

This study aims to design a reasonable distribution plate to get steady flow field in the core of PBDE

so that the fuel spheres can keep stable floating in the core.

Methods

To realize uniform flow field distribution of the core

the distribution plates which have different shapes and channel arrangements are designed based on PBDE. The flow field of the core is simulated using the FLUENT software.

Results

The simulation results showed that the conical distribution plate will produce some non-uniform flow field in the center area of the core

and the flat distribution plate can get the uniform flow field distribution better in the core compared with the conical distribution plate

in addition

the increase of channels or the decrease of apertures of the distribution plates can also make the flow field of the core more uniform.

Conclusions

The design of the reasonable distribution plate is significant to get the uniform flow field of the core

this study shows the basis for the experiment of PBDE

and provides the technical support and reference for the later design of the core distribution plate to the molten salt reactor.

关键词

Keywords

references

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