NUCLEAR TECHNIQUES, Volume. 46, Issue 3, 030402(2023)
Development and nuclear characteristic testing of a mobile miniature fission ionization chamber neutron detector
Figures & Tables(9)
Fig. 1. Structural design of the miniature-fission ionization chamber
Fig. 2. Snapshot of prototype for the mobile miniature-fission ionization chamber
Fig. 4. In-core test site for the miniature-fission ionization chamber
Fig. 6. Experimental results of linearity test for the prototype detectors
Table 1. Test results of the gamma sensitivity
View tableView in ArticleTable 1. Test results of the gamma sensitivity
探测器Detector 本底电流值Background current value I0 / 10-9 A γ电流实测值Measured gamma current I1 / 10-8 A γ感应度实测值Measured gamma sensitivity Snw / 10-12 A∙Gy-1∙h-1 国外产品Foreign products 2.83 1.92 1.49 自研样机
Self-developed prototype
#1 2.30 2.42 1.99 #2 1.30 2.24 1.92 #3 0.193 2.19 1.97
Table 2. Calibration results for the reactor power step
View tableView in ArticleTable 2. Calibration results for the reactor power step
序号
Index
注量率台阶Neutron flux steps / n∙cm-2∙s-1 预计热功率Estimated thermal power / kW 运行核功率Operation nuclear power / kW 标定注量率台阶Calibration steps of neutron flux / n∙cm-2∙s-1 1 1×109 4.87 5 1.08×109 2 1×1010 49.3 5 9.73×109 3 1×1011 49.3 50 1.11×1011 4 5×1011 246 250 5.65×1011 5 1×1012 493 500 1.13×1012 6 5×1012 2 460 2 500 5.67×1012 7 1×1013 4 930 5 000 1.13×1013 8 2×1013 9 860 10 000 2.15×1013 9 3.5×1013 19 000 20 000 3.74×1013
Table 3. Slope test for the prototype detector under a reactor neutron source
View tableView in ArticleTable 3. Slope test for the prototype detector under a reactor neutron source
探测器样机Detector prototype
探测器参数Detector characteristic
中子注量率Neutron flux 1×109 n∙cm-2∙s-1 中子注量率Neutron flux 1×1012 n∙cm-2∙s-1 #2 #3 #2 #3 U1.1 / V 175 175 175 175 U0.9 / V 125 125 125 125 UL坪长 Plateau length 50 50 50 50 U / V 142 142 142 142 Ps坪斜实测值Measured plateau slope / (%/100 V) 8%/100 V 7%/100 V 6%/100 V 6%/100 V Ps坪斜要求值Required plateau slope / (%/100 V) ＜20%/100 V ＜20%/100 V ＜20%/100 V ＜20%/100 V
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Jie YAN, Zhongwei WEN, Yao HE, Baili LIU, Yonghong HU, Mei WANG, Zijie HAN, Dazhi QIAN. Development and nuclear characteristic testing of a mobile miniature fission ionization chamber neutron detector[J]. NUCLEAR TECHNIQUES, 2023, 46(3): 030402
Paper Information
Category: Research Articles
Received: Nov. 2, 2022
Accepted: --
Published Online: Apr. 17, 2023
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