NUCLEAR TECHNIQUES, Volume. 47, Issue 9, 090403(2024)
Research on numerical method and experimental verification of the vanadium SPND gamma effect based on current component separation model
Figures & Tables(10)
Fig. 1. Diagram of vanadium SPND and the imaging schematic of the active region
Fig. 4. Calculation flowchart of SPND current in the research pulsed reactor
Fig. 5. Fitting curve of the shutdown attenuation current of vanadium SPND
Fig. 6. Time characteristics of different components of unit impulse response of vanadium SPND(a) (n, β-) process, (b) (n, γ, e-) process
Fig. 7. Dynamic response curve of vanadium SPND during load rejection test (a) Type-A assembly, (b) Type-D assembly
Table 1. Main dimensional parameters and material information of vanadium SPND
View tableView in ArticleTable 1. Main dimensional parameters and material information of vanadium SPND
结构
Structure
材料
Material
外径Outer diameter / mm 发射体Emitter 钒Vanadium 0.98 绝缘体Insulator 氧化铝Al2O3 1.57 收集体Collector 不锈钢SS 316L 2.04 信号线Signal wire 铬镍铁合金Inconel 690 1.58
Table 2. Calibration and current components calculation results in the 60Co gamma-rays experiment
View tableView in ArticleTable 2. Calibration and current components calculation results in the 60Co gamma-rays experiment
类别Category 数值Value 标定Calibration γ灵敏度Gamma sensitivity / A∙h∙cm∙Gy-1 -5.815×10-16 计算Calculation 正向灵敏度组分-光电效应
Forward sensitivity component-photoelectric effect / A∙h∙cm∙Gy-1
2.582×10-17 (+3.97%) 正向灵敏度组分-康普顿散射
Forward sensitivity component-Compton scattering / A∙h∙cm∙Gy-1
2.313×10-15 (+356.00%) 反向灵敏度组分-光电效应
Backward sensitivity component-photoelectric effect / A∙h∙cm∙Gy-1
-5.554×10-17 (-8.55%) 反向灵敏度组分-康普顿散射
Backward sensitivity component-Compton scattering / A∙h∙cm∙Gy-1
-2.933×10-15 (-451.43%) γ灵敏度Gamma sensitivity / A∙h∙cm∙Gy-1 -6.497×10-16
Table 3. Calculation and verification results of vanadium SPND current components at the 200 kW irradiation chamber
View tableView in ArticleTable 3. Calculation and verification results of vanadium SPND current components at the 200 kW irradiation chamber
类别Category 数值Value 份额Contribution / % 实验Experiment 稳态电流测量值Measured value of the steady-state current / A 5.421×10-10 ― 稳态电流缓发成分的测量值
Measured value of the delayed component of the steady-state current / A
5.31×10-10 97.95 稳态电流瞬发成分的测量值
Measured value of the prompt component of the steady-state current / A
1.11×10-11 2.05 计算Calculation 稳态电流计算值Calculated value of the steady-state current / A 5.298×10-10 ― (n, β-) / A 5.248×10-10 99.048 (n, γ, e-) / A 6.800×10-11 12.835 (γP, e-) / A -6.286×10-11 -11.864 (γD, e-) / A -2.004×10-14 -0.004 稳态电流缓发成分的计算值
Calculated value of the delayed component of the steady-state current / A
5.247×10-10 99.045 稳态电流瞬发成分的计算值
Calculated value of the prompt component of the steady-state current / A
5.144×10-12 0.971
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Yao ZHOU, Liangzhi CAO, Zhouyu LIU, Lipeng WANG, Ruizhi SHAO, Qingming HE, Hongchun WU. Research on numerical method and experimental verification of the vanadium SPND gamma effect based on current component separation model[J]. NUCLEAR TECHNIQUES, 2024, 47(9): 090403
Paper Information
Category: NUCLEAR ELECTRONICS AND INSTRUMENTATION
Received: Jan. 22, 2024
Accepted: --
Published Online: Nov. 13, 2024
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