Some Movement Mechanisms and Characteristics in Pebble Bed Reactor

The pebblebed-type high temperature gas-cooled reactor is considered to be one of the promising solutions for generation IV advanced reactors, and the two-region arranged reactor core can enhance its advantages by flattening neutron flux. However, this application is held back by the existence of mi...

Full description

Bibliographic Details
Main Authors: Xingtuan Yang, Yu Li, Nan Gui, Xinlong Jia, Jiyuan Tu, Shengyao Jiang
Format: Article
Language:English
Published: Hindawi Limited 2014-01-01
Series:Science and Technology of Nuclear Installations
Online Access:http://dx.doi.org/10.1155/2014/820481
id doaj-f36b98c781ea4c6c862c481068d10162
record_format Article
spelling doaj-f36b98c781ea4c6c862c481068d101622020-11-24T23:14:46ZengHindawi LimitedScience and Technology of Nuclear Installations1687-60751687-60832014-01-01201410.1155/2014/820481820481Some Movement Mechanisms and Characteristics in Pebble Bed ReactorXingtuan Yang0Yu Li1Nan Gui2Xinlong Jia3Jiyuan Tu4Shengyao Jiang5Institute of Nuclear and New Energy Technology of Tsinghua University and the Key Laboratory of Advanced Reactor Engineering and Safety, Ministry of Education, Beijing 100084, ChinaInstitute of Nuclear and New Energy Technology of Tsinghua University and the Key Laboratory of Advanced Reactor Engineering and Safety, Ministry of Education, Beijing 100084, ChinaInstitute of Nuclear and New Energy Technology of Tsinghua University and the Key Laboratory of Advanced Reactor Engineering and Safety, Ministry of Education, Beijing 100084, ChinaInstitute of Nuclear and New Energy Technology of Tsinghua University and the Key Laboratory of Advanced Reactor Engineering and Safety, Ministry of Education, Beijing 100084, ChinaInstitute of Nuclear and New Energy Technology of Tsinghua University and the Key Laboratory of Advanced Reactor Engineering and Safety, Ministry of Education, Beijing 100084, ChinaInstitute of Nuclear and New Energy Technology of Tsinghua University and the Key Laboratory of Advanced Reactor Engineering and Safety, Ministry of Education, Beijing 100084, ChinaThe pebblebed-type high temperature gas-cooled reactor is considered to be one of the promising solutions for generation IV advanced reactors, and the two-region arranged reactor core can enhance its advantages by flattening neutron flux. However, this application is held back by the existence of mixing zone between central and peripheral regions, which results from pebbles’ dispersion motions. In this study, experiments have been carried out to study the dispersion phenomenon, and the variation of dispersion region and radial distribution of pebbles in the specifically shaped flow field are shown. Most importantly, the standard deviation of pebbles’ radial positions in dispersion region, as a quantitative index to describe the size of dispersion region, is gotten through statistical analysis. Besides, discrete element method has been utilized to analyze the parameter influence on dispersion region, and this practice offers some strategies to eliminate or reduce mixing zone in practical reactors.http://dx.doi.org/10.1155/2014/820481
collection DOAJ
language English
format Article
sources DOAJ
author Xingtuan Yang
Yu Li
Nan Gui
Xinlong Jia
Jiyuan Tu
Shengyao Jiang
spellingShingle Xingtuan Yang
Yu Li
Nan Gui
Xinlong Jia
Jiyuan Tu
Shengyao Jiang
Some Movement Mechanisms and Characteristics in Pebble Bed Reactor
Science and Technology of Nuclear Installations
author_facet Xingtuan Yang
Yu Li
Nan Gui
Xinlong Jia
Jiyuan Tu
Shengyao Jiang
author_sort Xingtuan Yang
title Some Movement Mechanisms and Characteristics in Pebble Bed Reactor
title_short Some Movement Mechanisms and Characteristics in Pebble Bed Reactor
title_full Some Movement Mechanisms and Characteristics in Pebble Bed Reactor
title_fullStr Some Movement Mechanisms and Characteristics in Pebble Bed Reactor
title_full_unstemmed Some Movement Mechanisms and Characteristics in Pebble Bed Reactor
title_sort some movement mechanisms and characteristics in pebble bed reactor
publisher Hindawi Limited
series Science and Technology of Nuclear Installations
issn 1687-6075
1687-6083
publishDate 2014-01-01
description The pebblebed-type high temperature gas-cooled reactor is considered to be one of the promising solutions for generation IV advanced reactors, and the two-region arranged reactor core can enhance its advantages by flattening neutron flux. However, this application is held back by the existence of mixing zone between central and peripheral regions, which results from pebbles’ dispersion motions. In this study, experiments have been carried out to study the dispersion phenomenon, and the variation of dispersion region and radial distribution of pebbles in the specifically shaped flow field are shown. Most importantly, the standard deviation of pebbles’ radial positions in dispersion region, as a quantitative index to describe the size of dispersion region, is gotten through statistical analysis. Besides, discrete element method has been utilized to analyze the parameter influence on dispersion region, and this practice offers some strategies to eliminate or reduce mixing zone in practical reactors.
url http://dx.doi.org/10.1155/2014/820481
work_keys_str_mv AT xingtuanyang somemovementmechanismsandcharacteristicsinpebblebedreactor
AT yuli somemovementmechanismsandcharacteristicsinpebblebedreactor
AT nangui somemovementmechanismsandcharacteristicsinpebblebedreactor
AT xinlongjia somemovementmechanismsandcharacteristicsinpebblebedreactor
AT jiyuantu somemovementmechanismsandcharacteristicsinpebblebedreactor
AT shengyaojiang somemovementmechanismsandcharacteristicsinpebblebedreactor
_version_ 1725593575444447232