Monitoring method for neutron flux for a spallation target in an accelerator driven sub-critical system

Get Citation
Qiang Zhao, Zhi-Yong He, Lei Yang, Xue-Ying Zhang, Wen-Juan Cui, Zhi-Qiang Chen and Hu-Shan Xu. Monitoring method for neutron flux for a spallation target in an accelerator driven sub-critical system[J]. Chinese Physics C, 2016, 40(7): 076203. doi: 10.1088/1674-1137/40/7/076203
Qiang Zhao, Zhi-Yong He, Lei Yang, Xue-Ying Zhang, Wen-Juan Cui, Zhi-Qiang Chen and Hu-Shan Xu. Monitoring method for neutron flux for a spallation target in an accelerator driven sub-critical system[J]. Chinese Physics C, 2016, 40(7): 076203.  doi: 10.1088/1674-1137/40/7/076203 shu
Milestone
Received: 2015-08-10
Fund

    Supported by Strategic Priority Research Program of Chinese Academy of Sciences (XDA03010000 and XDA03030000) and the National Natural Science Foundation of China(91426301)

Article Metric

Article Views(1425)
PDF Downloads(122)
Cited by(0)
Policy on re-use
To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.
通讯作者: 陈斌, bchen63@163.com
  • 1. 

    沈阳化工大学材料科学与工程学院 沈阳 110142

  1. 本站搜索
  2. 百度学术搜索
  3. 万方数据库搜索
  4. CNKI搜索

Email This Article

Title:
Email:

Monitoring method for neutron flux for a spallation target in an accelerator driven sub-critical system

    Corresponding author: Zhi-Yong He,
Fund Project:  Supported by Strategic Priority Research Program of Chinese Academy of Sciences (XDA03010000 and XDA03030000) and the National Natural Science Foundation of China(91426301)

Abstract: In this paper, we study a monitoring method for neutron flux for the spallation target used in an accelerator driven sub-critical (ADS) system, where a spallation target located vertically at the centre of a sub-critical core is bombarded vertically by high-energy protons from an accelerator. First, by considering the characteristics in the spatial variation of neutron flux from the spallation target, we propose a multi-point measurement technique, i.e. the spallation neutron flux should be measured at multiple vertical locations. To explain why the flux should be measured at multiple locations, we have studied neutron production from a tungsten target bombarded by a 250 MeV-proton beam with Geant4-based Monte Carlo simulations. The simulation results indicate that the neutron flux at the central location is up to three orders of magnitude higher than the flux at lower locations. Secondly, we have developed an effective technique in order to measure the spallation neutron flux with a fission chamber (FC), by establishing the relation between the fission rate measured by FC and the spallation neutron flux. Since this relation is linear for a FC, a constant calibration factor is used to derive the neutron flux from the measured fission rate. This calibration factor can be extracted from the energy spectra of spallation neutrons. Finally, we have evaluated the proposed calibration method for a FC in the environment of an ADS system. The results indicate that the proposed method functions very well.

    HTML

Reference (9)

目录

/

DownLoad:  Full-Size Img  PowerPoint
Return
Return