Effect analysis of beryllium poison on the physics characteristics of reactor core

Fig. 5. Effect of beryllium poison accumulation on 4# irradiation channel (color online)(a) Poison-free, (b) N $_{{}^{3} H e}$ :N $_{{}^{3} H}$ =0:1，(c) N $_{{}^{3} H e}$ :N $_{{}^{3} H}$ =1:1，(d) N $_{{}^{3} H e}$ :N $_{{}^{3} H}$ =1:0

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Fig. 6. Effect of beryllium poison accumulation on active zone (color online)(a) Poison-free, (b) N $_{{}^{3} H e}$ :N $_{{}^{3} H}$ =0:1, (c) N $_{{}^{3} H e}$ :N $_{{}^{3} H}$ =1:1, (d) N $_{{}^{3} H e}$ :N $_{{}^{3} H}$ =1:0

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Fig. 7. Thermal neutron flux rate distribution in 2# (a) and 4# (b) irradiated channel

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Table 1. Calculation results of ⁶Li atomic density of poison in reflected beryllium

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Table 1. Calculation results of ⁶Li atomic density of poison in reflected beryllium

铍块 Beryllium	⁶Li含量 Content of ⁶Li / 10¹⁷ n∙cm^-3	铍块 Beryllium	⁶Li含量 Content of ⁶Li / 10¹⁷ n∙cm^-3	铍块 Beryllium	⁶Li含量 Content of ⁶Li / 10¹⁷ n∙cm^-3	铍块 Beryllium	⁶Li含量 Content of ⁶Li / 10¹⁷ n∙cm^-3
C03	4.79	I03	1.50	K16	2.21	P14	1.38
C04	3.57	I17	1.52	K17	1.11	P21	11.50
D07	2.86	J04	2.54	K18	0.91	Q12	13.00
D08	4.14	J05	8.19	K19	1.45	Q13	11.00
D11	4.25	J06	11.60	L05	2.51	Q15	7.33
D12	2.91	J15	3.31	L06	8.08	R14	2.62
D14	8.00	J16	1.56	L07	11.50	S14	3.15
E08	8.45	J17	0.98	L16	3.23	S15	3.72
F06	15.30	J18	1.34	L17	1.54	S18	3.52
F07	13.70	K04	1.59	L18	1.05	S19	3.34
F09	11.80	K05	3.79	L19	1.73	S21	6.33
F10	1.92	K06	14.40	M05	1.74	T11	5.60
G17	1.84	K07	7.65	M19	19.60	T12	4.97

Table 2. Calculation result of the sum of atomic density of ³He & ³H of the reflected beryllium poison

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Table 2. Calculation result of the sum of atomic density of ³He & ³H of the reflected beryllium poison

铍块 Beryllium	³He+³H含量 Content of ³He+³H / 10¹⁷ n∙cm^-3	铍块 Beryllium	³He+³H含量 Content of ³He+³H / 10¹⁷ n∙cm^-3	铍块 Beryllium	³He+³H含量 Content of ³He+³H / 10¹⁷ n∙cm^-3	铍块 Beryllium	³He+³H含量 Content of ³He+³H / 10¹⁷ n∙cm^-3
C03	0.60	I03	0.58	K16	2.43	P14	0.14
C04	3.66	I17	1.10	K17	0.69	P21	16.70
D07	2.94	J04	3.40	K18	0.22	Q12	18.70
D08	1.10	J05	13.20	K19	1.04	Q13	15.50
D11	0.63	J06	16.60	L05	3.30	Q15	8.71
D12	0.15	J15	4.10	L06	13.00	R14	2.46
D14	10.40	J16	1.21	L07	16.20	S14	2.87
E08	12.30	J17	0.34	L16	3.92	S15	0.98
F06	21.70	J18	0.58	L17	1.16	S18	0.55
F07	21.20	K04	1.81	L18	0.36	S19	0.14
F09	17.80	K05	6.43	L19	0.58	S21	0.40
F10	0.16	K06	25.40	M05	0.61	T11	0.53
G17	0.65	K07	11.10	M19	33.30	T12	0.40

Table 3. The k_eff with different beryllium poison content

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Table 3. The k_eff with different beryllium poison content

序号 Number	⁶Li含量 Content of ⁶Li	³He与³H占比 Ratio of ³He to³H	有效增殖因子 k_eff
1	Free	Free	1.020 12
2	Saturation	0:1	1.017 91
3	Saturation	1:9	1.013 53
4	Saturation	1:4	1.009 71
5	Saturation	3:7	1.006 09
6	Saturation	2:3	1.002 84
7	Saturation	1:1	0.999 94
8	Saturation	3:2	0.997 02
9	Saturation	7:3	0.994 43
10	Saturation	4:1	0.992 01
11	Saturation	9:1	0.989 77
12	Saturation	1:0	0.987 67

Table 4. The calculated and experimental values of cold subcriticality of beryllium poison are considered

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Table 4. The calculated and experimental values of cold subcriticality of beryllium poison are considered

炉段 Section	实验值 Expeiment / β_eff	计算值1 Calculation 1 / β_eff	计算值2 Calculation 2 / β_eff	偏差1 Deviation 1 / β_eff	偏差2 Deviation 2 / β_eff
28-1	7.37	4.84	5.86	2.53	1.51
28-2	7.59	5.49	6.02	2.10	1.57
28-3	6.88	4.79	6.10	2.09	0.78
28-4	7.92	6.08	6.28	1.84	1.64

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Wenqi ZHANG, Shuiqing LIU, Liyong MA, Runqi LIU, Changhu KANG, Peng LIU. Effect analysis of beryllium poison on the physics characteristics of reactor core[J]. NUCLEAR TECHNIQUES, 2025, 48(7): 070011

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Paper Information

Category: Special Issue on The First Academic Annual Conference of the Research Reactor and Innovative Reactor Association of Chinese Nuclear Society and Advanced Nuclear Power System Reactor Engineering

Received: Dec. 29, 2024

Accepted: --

Published Online: Sep. 15, 2025

The Author Email: Wenqi ZHANG (597860705@qq.com)

DOI:10.11889/j.0253-3219.2025.hjs.48.240544

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Calculation results of 6Li atomic density of poison in reflected beryllium

Table 1. Calculation results of 6Li atomic density of poison in reflected beryllium

Table 2. Calculation result of the sum of atomic density of 3He & 3H of the reflected beryllium poison

Table 2. Calculation result of the sum of atomic density of 3He & 3H of the reflected beryllium poison

Table 3. The keff with different beryllium poison content

Table 3. The keff with different beryllium poison content

Table 4. The calculated and experimental values of cold subcriticality of beryllium poison are considered

Table 4. The calculated and experimental values of cold subcriticality of beryllium poison are considered

Table 1. Calculation results of ⁶Li atomic density of poison in reflected beryllium

Table 1. Calculation results of ⁶Li atomic density of poison in reflected beryllium

Table 2. Calculation result of the sum of atomic density of ³He & ³H of the reflected beryllium poison

Table 2. Calculation result of the sum of atomic density of ³He & ³H of the reflected beryllium poison

Table 3. The k_eff with different beryllium poison content

Table 3. The k_eff with different beryllium poison content