RESEARCH ON DOSE MONITORING IN BACKSCATTERING NEUTRON HALL IN CHINA SPALLATION NEUTRON SOURCE

RESEARCH ON DOSE MONITORING IN BACKSCATTERING NEUTRON HALL IN CHINA SPALLATION NEUTRON SOURCE

The back-n project in China Spallation Neutron Source (CSNS) was launched primarily for nuclear data measurements. In the backscattering neutron hall, the neutron and gamma monitors were used for dose monitoring. Because of the dead time problem of monitors, performance of the monitors in such pulse...

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Veröffentlicht in:Radiation protection dosimetry 2020-07, Vol.189 (2), p.253-269
Hauptverfasser: Wu, Qingbiao, Zhuang, Sixuan, Liu, Qiongyao, Jing, Hantao, Ye, Rong, Li, Lun, Wang, Yufei, Wang, Qingbin
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container_end_page 269
container_issue 2
container_start_page 253
container_title Radiation protection dosimetry
container_volume 189
creator Wu, Qingbiao
Zhuang, Sixuan
Liu, Qiongyao
Jing, Hantao
Ye, Rong
Li, Lun
Wang, Yufei
Wang, Qingbin
description The back-n project in China Spallation Neutron Source (CSNS) was launched primarily for nuclear data measurements. In the backscattering neutron hall, the neutron and gamma monitors were used for dose monitoring. Because of the dead time problem of monitors, performance of the monitors in such pulsed radiation field needs to be analyzed. In this research, experiments with dose monitors and personal dosemeters were conducted, and simulation by Monte Carlo code FLUKA was performed. Results showed that the values by monitors are smaller, and the larger the dose, the larger the difference. The reasons in term of energy response and dead time have been analyzed, and corrections were discussed. After corrections, the measured value can agree with the simulation results in the range of about a factor 3. Totally speaking, the values recorded by neutron and gamma monitors can be a reference for radiation safety management in CSNS.
doi_str_mv 10.1093/rpd/ncaa038
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