一种改进型源倍增法的模拟研究与验证

孙燕婷; 陈思泽; 杨琪; 刘超; 贾婧

doi:10.11884/HPLPB201830.170219

一种改进型源倍增法的模拟研究与验证

doi: 10.11884/HPLPB201830.170219

孙燕婷^{1, 2,},
陈思泽¹,
杨琪¹,
刘超¹,
贾婧^1, ,

1.
中国科学院核能安全技术研究所, 中子输运理论与辐射安全重点实验室, 合肥 230031
2.
中国科学技术大学, 合肥 230026

基金项目:

中国科学院国防科技创新基金项目 CXJJ-15M037

中国科学院国防科技创新基金项目 CXJJ-16Q231

中国科学院战略先导专项 XDA03040000

详细信息

作者简介:
孙燕婷(1989-), 女，博士，从事核能科学与工程方向研究；yanting.sun@fds.org.cn

通讯作者:
贾婧(1986-), 女，博士，从事核能科学与工程方向研究；jing.jia@fds.org.cn

中图分类号: TL375.1
计量
- 文章访问数: 1279
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- 被引次数: 0
出版历程
- 收稿日期: 2017-06-20
- 修回日期: 2017-09-11
- 刊出日期: 2018-01-15

Simulation study and validation of improved amplified source method

Sun Yanting^{1, 2
,},
Chen Size¹,
Yang Qi¹,
Liu Chao¹,
Jia Jing^{1
, ,}

1.
Key Laboratory of Neutronics and Radiation Safety, Institute of Nuclear Energy Safety Technology, Chinese Academy of Sciences, Hefei 230031, China
2.
University of Science and Technology of China, Hefei 230026, China

摘要

摘要: 针对源倍增法测量次临界度受到基波份额变化以及通量畸变影响的问题，有文献提出使用环形“集总”探测器布置和“刻度曲线”来改善其测量结果的方法。为了验证该方法的实用性，用超级蒙特卡罗核模拟软件系统SuperMC与混合评价数据库HENDL，以日本京都大学KUCA铅基实验装置为对象, 展开了模拟研究。研究结果表明：该改进方法在KUCA实验装置上是适用的，说明此改进方法具有较好的工程应用潜力。模拟结果表明，使用KUCA装置中现有的六个裂变室进行“集总”探测可以给出相对准确的“测量”次临界度，但为了使测量结果更加准确，在未来实验中，可以在堆芯外围布置更多对称的探测器进行“集总”探测。
- 源倍增法 /
- 次临界度 /
- KUCA
Abstract: Amplified Source Method(ASM) is based on point kinetics model. While used in Accelerator Driven System(ADS) with deep subcriticality and strong external source, its result is affected by the external source effect, the fundamental flux effect and the spatial effect seriously. In order to solve this problem, an annular detector positioning method with calibration has been given. In order to test the practicality of this method, further study is performed against the Kyoto University Critical Assembly by Super Monte Carlo Program for Nuclear and Radiation Simulation(SuperMC) with the HENDL database. Numerical results demonstrate that the proposed method works well for the problem and the six fission chambers in the assembly can give a good measurement result. And more detectors arranged on the fringes of the core are needed in the upcoming experiments to get more accurate measurement results.
- amplified source method /
- subcriticality /
- KUCA

HTML全文

图 1 KUCA堆芯布置横向剖视图

Figure 1. Transverse section view of KUCA

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图 2 探测器#1次临界度“刻度曲线”

Figure 2. Subcriticality measurement curve given by detector #1

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图 3 不同工况下f(r)的分布

Figure 3. Radial f(r) under different core conditions

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图 4 环形探测器(#4-#11)给出的测量曲线

Figure 4. Measurement curve given by annular detectors (#4-#11)

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图 5 环形探测器布置(六个裂变室)给出的测量曲线

Figure 5. Measurement curve given by fission chambers

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表 1 KUCA不同堆芯布置下的次临界度

Table 1. Subcriticalities of KUCA under different core conditions

case	number of fuel rods	rod insertion	k_eff
case	number of fuel rods	rod insertion	Ref.[10]	simulation results	\|relative deviations\|/%
1	46	C1, C2, C3, S4, S5, S6	0.977 50	0.978 41	0.09
2	32	all six rods withdrawn	0.954 40	0.955 05	0.07
3	26	all six rods withdrawn	0.910 42	0.910 62	0.02

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表 2 不同工况次临界度与探测器计数

Table 2. Subcriticalities and detector counts under different core conditions

conditions	control rods’ position/cm	raw subcriticality ρ_r/pcm	detector count rate(#1)/10^-2s^-1	measuring subcriticality ρ_m/pcm
Con.1	50	2 211.86	2.547 42	898.77
Con.2	60	1 902.52	2.995 04	764.45
Con.3	65	1 515.63	3.538 90	646.97
Con.4	70	1 120.41	4.438 02	515.90
Con.5	80	279.78	8.183 41	279.78
Con.6	C1 control rod inserted into the core	272.74	8.382 95	273.12
Con.7	C1, C2, C3, S5 control rod inserted into the core	1 479.57	4.339 80	527.57
Con.8	C1, C2, C3, S4, S5 control rod inserted into the core	2 008.55	3.535 54	647.58

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表 3 不同探测器布置给出的工况6-8的次临界度测量结果

Table 3. Subcriticality of Con.6-8 given by different detector arrangements

conditions	raw subcriticality ρ_r/ pcm	single detector(#1)		fission chamber detectors		#4~#11 detectors
conditions	raw subcriticality ρ_r/ pcm	measuring subcriticality ρ_{m, 1}/ pcm	$\left\|\frac{\rho_{\mathrm{m}, 1}-\rho_{\mathrm{r}}}{\rho_{\mathrm{r}}}\right\| / \%$	measuring subcriticality ρ_{m, 2}/ pcm	$\left\|\frac{\rho_{\mathrm{m}, 2}-\rho_{\mathrm{r}}}{\rho_{\mathrm{r}}}\right\| / \%$	measuring subcriticality ρ_{m, 3}/ pcm	$\left\|\frac{\rho_{\mathrm{m}, 3}-\rho_{\mathrm{r}}}{\rho_{\mathrm{r}}}\right\| / \%$
Con.6	272.74	257.56	5.57	269.85	1.06	271.10	0.60
Con.7	1 479.57	1 148.63	22.37	1 395.83	5.66	1 459.15	1.38
Con.8	2 008.55	1 540.64	23.30	1 959.25	2.45	1 993.29	0.76

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