Study on the calibration method of newly connected seismic water radon monitor

Fig. 2. Calibration of FD125 scintillation chamber with standard radon chamber(a) Series cycle sampling, (b) Vacuum negative pressure gas extraction, (c) Flow gas extraction

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Fig. 3. Results comparison of three calibration methods for FD-125 radon meter

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Table 1. Response coefficient R of scintillation chamber at each measuring point of cyclic method

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Table 1. Response coefficient R of scintillation chamber at each measuring point of cyclic method

闪烁室序号 Scintillation chamber number	理论氡参考浓度 Theoretical radon concentration / Bq·m^-3	本底计数 Background count N₀	测量点计数 Measuring points count N_i	响应系数 Response coefficientR_i	$\bar{R}$	各次校准相对误差 Relative error of each calibration / %
1 802#	782.29	17	593, 657, 588	12.86	12.30	4.60
	1 570.29	20	1 286, 1 296, 1 262	12.19		0.84
	3 028.57	23	2 358, 2 263, 2 326	12.94		5.21
	5 828.57	60	4 446, 4 616, 4 362	12.93		5.16
	8 818.28	28	8 210, 8 294, 8 157	10.54		14.28
	17 024.00	16	13 558, 13 566, 13 546	12.31		0.14
1 803#	753.71	23	509, 516, 530	14.90	14.03	6.19
	1 609.14	19	1 085, 1 090, 1 090	14.74		5.01
	3 069.71	30	2 109, 2 102, 2 131	14.43		2.79
	5 883.43	63	3 971, 4 081, 4 034	14.53		3.53
	8 754.29	25	7 540, 7 375, 7 405	11.56		17.61
	17 280.00	26	12 071, 12 085, 12 065	14.05		0.09
1 804#	773.14	19	580, 545, 549	14.05	13.79	1.87
	1 644.57	30	1 174, 1 138, 1 097	14.56		5.57
	3 033.14	54	1 943, 2 107,1 945	15.28		10.79
	5 938.29	142	4 172, 4 316, 4 171	14.26		3.42
	8 859.43	35	7 565, 7 664, 7 658	11.43		17.15
	17 289.14	24	12 633, 12 876, 13 134	13.17		4.50
1 805#	785.71	23	672, 657, 660	12.02	11.74	2.44
	1 624.00	111	1 246, 1 308, 1 263	13.70		16.68
	2 946.29	93	2 489, 2 428, 2 614	11.94		1.70
	5 604.57	53	4 815, 4 809, 4 807	11.54		1.70
	8 722.29	39	9 142, 8 978, 9 084	9.46		19.40
	17 161.14	24	14 335, 14 144, 14 438	11.77		0.27

Table 2. Response coefficient R of scintillation chamber at each measuring point by vacuum method

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Table 2. Response coefficient R of scintillation chamber at each measuring point by vacuum method

闪烁室序号 Scintillation chamber number	理论氡参考浓度 Theoretical radon concentration / Bq·m^-3	本底计数 Background count N₀	测量点计数 Measuring points count N_i	响应系数 Response coefficientR_i	$\bar{R}$	各次校准相对误差 Relative error of each calibration / %
1 802#	883.43	20	525, 508, 588	16.63	17.40	7.08
	1 604.57	47	934, 940, 996	17.28		3.47
	3 177.14	55	1 756, 1 833, 1 890	17.57		1.84
	6 569.14	69	3 369, 3 640, 3 909	18.02		0.69
	11 702.86	58	6 072, 6 358, 6 376	18.46		3.12
	18 020.57	46	10 470, 10 594, 10 833	16.44		8.13
1 803#	945.71	14	432, 505, 508	19.81	18.99	4.27
	1 614.86	60	777, 892, 923	19.67		3.57
	3 136.00	29	1 652, 1 752, 1 811	17.969		5.40
	6 971.43	28	3 356, 3 397, 3 538	20.07		5.65
	11 702.86	33	5 778, 6 210, 6 190	19.02		0.13
	17 280.00	26	12 071, 12 085, 12 065	17.43		8.23
1 804#	948.00	12	458, 516, 441	20.20	19.03	6.23
	1 638.86	36	894, 866, 879	19.03		0.06
	3 117.71	33	1 572, 1 685, 1 799	18.48		2.80
	6 848.00	35	3 430, 3 524, 3 585	19.28		1.42
	11 629.71	25	5 660, 6 000, 6 210	19.20		0.99
	17 974.86	84	9 779, 9 753, 10 041	18.01		5.27
1 805#	958.29	26	581, 609, 591	16.54	16.75	1.32
	1 690.29	51	928, 986, 1 005	17.96		7.17
	3 028.57	27	1 882, 1 875, 1 910	15.93		4.92
	6 491.43	52	3 891, 4 002, 4 247	15.92		5.00
	11 849.14	28	6 768, 6 850, 7 413	16.62		0.80
	18 194.29	90	9 933, 10 135, 10 629	17.57		4.87

Table 3. Response coefficient R of scintillation chamber at each measuring point of flow-gas method

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Table 3. Response coefficient R of scintillation chamber at each measuring point of flow-gas method

闪烁室序号 Scintillation chamber number	理论氡参考浓度 Theoretical radon concentration / Bq·m^-3	本底计数 Background count N₀	测量点计数 Measuring points count N_i	响应系数 Response coefficientR_i	$\bar{R}$	各次校准相对误差 Relative error of each calibration / %
1 802#	796.67	—	571, 544, 623	13.47	12.77	5.46
	1 589.33	—	1 243, 1 222, 1 258	12.54		1.79
	2 781.33	—	1 951, 2 020, 1 997	13.69		7.22
	5 445.33	—	3 990, 3 848, 3 911	13.62		6.63
	9 642.67	—	7 781, 7 777, 7 613	12.23		4.26
	13 770.67	—	12 256, 12 183, 12 087	11.08		13.26
1 803#	788.00	—	347, 368, 345	21.84	18.23	19.85
	1 480.00	—	858, 838, 850	17.08		6.29
	2 749.33	—	1 621, 1 584, 1 508	17.14		5.95
	5 674.67	—	2 662, 2 589, 2 611	21.21		16.36
	9 642.67	—	5 837, 5 656, 5 679	16.50		9.47
	13 184.00	—	8 304, 8 137, 8 420	15.58		14.50
1 804#	776.67	—	509, 527, 509	14.77	15.47	4.52
	1 494. 67	—	929, 933, 981	15.45		0.14
	2 840.00	—	1 902, 1 869, 1 732	15.16		1.98
	5 632.00	—	3 149, 3 247, 3 087	17.45		12.80
	9 760.00	—	6 126, 6 172, 6 103	15.58		0.74
	14 122.67	—	9 617, 9 531, 9 678	14.40		6.91
1 805#	753.33	—	557, 608, 593	12.59	11.54	9.13
	1 542.67	—	1 383, 1 446, 1 394	10.73		6.97
	2 808.00	—	2 513, 2 493, 2 449	11.07		4.08
	5 813.33	—	4 176, 4 223, 4 269	13.66		18.35
	9 482.67	—	8 843, 8 506, 8 547	10.76		6.75
	13 461.33	—	12 843, 12 595, 12 513	10.42		9.67

Table 4. Evaluation of uncertainty of three calibration methods (%)

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Table 4. Evaluation of uncertainty of three calibration methods (%)

校准方式 Calibration mode	不确定度分量 Uncertainty component u_i			合成标准不确定度 Synthetic standard uncertainty u_c	相对扩展不确定度 Relative extended uncertainty U_rel
校准方式 Calibration mode	标准氡体积活度测量结果 Standard radon volume activity measurements u₁	校准结果响应重复性 Calibration result response repeatability u₂	装置的年稳定性 Annual stability of the device u₃	合成标准不确定度 Synthetic standard uncertainty u_c	相对扩展不确定度 Relative extended uncertainty U_rel
循环法 Circulation method	6.0	1.6	1.15	6.3	12.6
真空法 Vacuum method	6.2	1.3		6.4	12.8
流气法 Flow gas method	5.5	3.2		6.5	13.0

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Rengui HUANG, Ying ZHAO, Yuze LI, Hongtao NING, Hongyan ZHOU, Hua MAO, Jian XIAO, Mengren XIAO, Pei HUANG. Study on the calibration method of newly connected seismic water radon monitor[J]. NUCLEAR TECHNIQUES, 2023, 46(11): 110402

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Paper Information

Category: Research Articles

Received: Mar. 10, 2023

Accepted: --

Published Online: Dec. 23, 2023

The Author Email:

DOI:10.11889/j.0253-3219.2023.hjs.46.110402

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology