Neutronic analysis and measurement performance assessment of ITER neutron flux monitor system

被引：0
|
作者：
Wen, Zuowei [1 ]
Yuan, Guoliang [1 ]
Li, Yong [1 ]
Yang, Qingwei [1 ]
Li, Jun [1 ]
Zhao, Li [1 ]
Wei, Lingfeng [1 ]
Zhang, Jinwen [1 ]
机构：
[1] Southwestern Inst Phys, Chengdu 610041, Sichuan, Peoples R China
来源：
FUSION ENGINEERING AND DESIGN | 2023年 / 187卷
关键词：
ITER; Neutron flux monitor; Fission chamber; MCNP; CALIBRATION; DETECTORS;
D O I：
10.1016/j.fusengdes.2022.113364
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
The ITER Neutron Flux Monitor (NFM) system consists of four subsystems located at ITER Equatorial Ports 1#, 7#, 8#, and 17#. NFM system carries out the measurement of total neutron yield and fusion power by employing 235U fission chambers. The total neutron yield to be measured spans a range of 7 orders of magnitude - from 1014 to 3.2 x 1020 n/s. Suitable moderator and detectors were selected to cover such a wide range of neutron yield and meet the requirements of time resolution and accuracy. Moderators and detectors' sensitivities of NFM system are reasonably designed. The detectors' sensitivities of the NFM#01 system under different moderators have been calculated with MCNP code, and graphite serves as the optimal moderator. The detectors' sensitivities of the other three NFM subsystems have also been simulated simultaneously. Based on the required sensitivities of detector, the appropriate mass of 235U was selected for each fission chamber. According to the analysis of the measurement range of each NFM subsystem, it is finally confirmed that the measurement performance of the NFM system can meet the requirements well.
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页数：5
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