Effect of high-energy neutron source on predicting the proton beam current in the ADS design
The accelerator-driven subcritical system (ADS) is driven by a neutron source from spallation reactions introduced by the injected proton beam. Part of the neutron source has energy as high as a few hundred MeV to a few GeV. The effects of high-energy source neutrons (En > 20 MeV) are usually app...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2017-12-01
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| Series: | Nuclear Engineering and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1738573317303303 |
| _version_ | 1819292939947343872 |
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| author | Youqi Zheng Xunzhao Li Hongchun Wu |
| author_facet | Youqi Zheng Xunzhao Li Hongchun Wu |
| author_sort | Youqi Zheng |
| collection | DOAJ |
| description | The accelerator-driven subcritical system (ADS) is driven by a neutron source from spallation reactions introduced by the injected proton beam. Part of the neutron source has energy as high as a few hundred MeV to a few GeV. The effects of high-energy source neutrons (En > 20 MeV) are usually approximated by energy cut-off treatment in practical core calculations, which can overestimate the predicted proton beam current in the ADS design. This article intends to quantize this effect and propose a way to solve this problem. To evaluate the effects of high-energy neutrons in the subcritical core, two models are established aiming to cover the features of current experimental facilities and industrial-scale ADS in the future. The results show that high-energy neutrons with En > 20 MeV are of small fraction (2.6%) in the neutron source, but their contribution to the source efficiency is about 23% for the large scale ADS. Based on this, a neutron source efficiency correction factor is proposed. Tests show that the new correction method works well in the ADS calculation. This method can effectively improve the accuracy of the prediction of the proton beam current. |
| first_indexed | 2024-12-24T04:02:30Z |
| format | Article |
| id | doaj.art-c9a6917fff864ae2ae7c8860fdeba611 |
| institution | Directory Open Access Journal |
| issn | 1738-5733 |
| language | English |
| last_indexed | 2024-12-24T04:02:30Z |
| publishDate | 2017-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Engineering and Technology |
| spelling | doaj.art-c9a6917fff864ae2ae7c8860fdeba6112022-12-21T17:16:17ZengElsevierNuclear Engineering and Technology1738-57332017-12-014981600160910.1016/j.net.2017.08.019Effect of high-energy neutron source on predicting the proton beam current in the ADS designYouqi ZhengXunzhao LiHongchun WuThe accelerator-driven subcritical system (ADS) is driven by a neutron source from spallation reactions introduced by the injected proton beam. Part of the neutron source has energy as high as a few hundred MeV to a few GeV. The effects of high-energy source neutrons (En > 20 MeV) are usually approximated by energy cut-off treatment in practical core calculations, which can overestimate the predicted proton beam current in the ADS design. This article intends to quantize this effect and propose a way to solve this problem. To evaluate the effects of high-energy neutrons in the subcritical core, two models are established aiming to cover the features of current experimental facilities and industrial-scale ADS in the future. The results show that high-energy neutrons with En > 20 MeV are of small fraction (2.6%) in the neutron source, but their contribution to the source efficiency is about 23% for the large scale ADS. Based on this, a neutron source efficiency correction factor is proposed. Tests show that the new correction method works well in the ADS calculation. This method can effectively improve the accuracy of the prediction of the proton beam current.http://www.sciencedirect.com/science/article/pii/S1738573317303303Accelerator-driven SystemCorrection MethodHigh-energy Neutron SourceNeutron Source EfficiencyProton Beam Current |
| spellingShingle | Youqi Zheng Xunzhao Li Hongchun Wu Effect of high-energy neutron source on predicting the proton beam current in the ADS design Nuclear Engineering and Technology Accelerator-driven System Correction Method High-energy Neutron Source Neutron Source Efficiency Proton Beam Current |
| title | Effect of high-energy neutron source on predicting the proton beam current in the ADS design |
| title_full | Effect of high-energy neutron source on predicting the proton beam current in the ADS design |
| title_fullStr | Effect of high-energy neutron source on predicting the proton beam current in the ADS design |
| title_full_unstemmed | Effect of high-energy neutron source on predicting the proton beam current in the ADS design |
| title_short | Effect of high-energy neutron source on predicting the proton beam current in the ADS design |
| title_sort | effect of high energy neutron source on predicting the proton beam current in the ads design |
| topic | Accelerator-driven System Correction Method High-energy Neutron Source Neutron Source Efficiency Proton Beam Current |
| url | http://www.sciencedirect.com/science/article/pii/S1738573317303303 |
| work_keys_str_mv | AT youqizheng effectofhighenergyneutronsourceonpredictingtheprotonbeamcurrentintheadsdesign AT xunzhaoli effectofhighenergyneutronsourceonpredictingtheprotonbeamcurrentintheadsdesign AT hongchunwu effectofhighenergyneutronsourceonpredictingtheprotonbeamcurrentintheadsdesign |