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外围熔盐层堵塞状态下熔盐堆内部温度分布分析
封面论文The temperature distribution of molten salt reactor under the outer salt layer blocked situation
- 核技术 2018年41卷第5期 文章编号：050601
- 作者机构：
1.中国科学院上海应用物理研究所 嘉定园区 上海 201800
2.中国科学院先进核能创新研究院 上海 201800
3.中国科学院大学 北京 100049
- 作者简介：
[ "何龙, 男, 1987年出生, 2012年于中国科学院近代物理研究所获硕士学位, 现为博士研究生, 研究领域为反应堆热工水力学", "HE Long, male, born in 1987, graduated from Institute of Modern Physics, Chinese Academy of Sciences with a master's degree in 2012, doctoral student, focusing on reactor thermal hydraulics" ]
郭威, E-mail:guowei@sinap.ac.cn GUO Wei, E-mail:guowei@sinap.ac.cn
蔡翔舟, E-mail:caixz@sinap.ac.cn CAI Xiangzhou, E-mail:caixz@sinap.ac.cn
- 基金信息：中国科学院战略性先导科技专项(XDA02010000);若干关键问题研究项目(QYZDY-SSW-JSC016);国家自然科学基金(91326201)
DOI：10.11889/j.0253-3219.2018.hjs.41.050601
中图分类号： TL333收稿日期：2017-12-27，
修回日期：2018-01-24，
纸质出版日期：2018-05-10
- 稿件说明：
移动端阅览
何龙, 余呈刚, 郭威, 等. 外围熔盐层堵塞状态下熔盐堆内部温度分布分析[J]. 核技术, 2018,41(5):050601
Long HE, Chenggang YU, Wei GUO, et al. The temperature distribution of molten salt reactor under the outer salt layer blocked situation[J]. Nuclear techniques, 2018, 41(5): 050601
何龙, 余呈刚, 郭威, 等. 外围熔盐层堵塞状态下熔盐堆内部温度分布分析[J]. 核技术, 2018,41(5):050601 DOI： 10.11889/j.0253-3219.2018.hjs.41.050601.
Long HE, Chenggang YU, Wei GUO, et al. The temperature distribution of molten salt reactor under the outer salt layer blocked situation[J]. Nuclear techniques, 2018, 41(5): 050601 DOI： 10.11889/j.0253-3219.2018.hjs.41.050601.
摘要
出于冷却结构材料上的考虑，石墨慢化通道型熔盐堆通常在石墨反射层与反应堆容器间设置了外围熔盐层。针对2 MW液态燃料熔盐堆的概念设计，利用三维稳态热工水力学模型分析了外围熔盐层在不同堵塞情况下对反射层和合金温升造成的影响。熔盐堆内石墨慢化材料等固体区域的温度计算采用三维热传导模型，各个通道内熔盐采用一维单相流体模型描述。外围熔盐层在不同堵塞情况下分别采用一维单相流体模型和三维层流模型。计算结果表明：在外围熔盐层内总流量降低的堵塞情况下，外围熔盐层对反射层的冷却效果受到显著影响，在外围熔盐层的流量降低至堆芯额定流量0.365%时，反应堆容器的最高温度接近730℃，临近合金材料温度上的安全限值；当外围熔盐层内存在直径为4 cm的圆形局部堵塞（接近下熔盐通道半径）区域时，堵塞没有显著改变堆内的温度分布，堵塞区域的最高温度为621.74℃，未超过合金材料的安全限值。
Abstract
Background
2
For the graphite-moderated channel type molten salt reactor
the outer salt layer is typically adopted to cool the graphite moderator and the reactor vessel. Since the outer salt layer is adjacent to the alloy
the safety of the structure material is directly influenced by the cooling effect of the outer salt layer.
Purpose
2
This study aims at researching the influence of the outer salt layer under blocked situation on the temperature distribution of reflector and alloy for a conceptual designed 2 MW experimental molten salt reactor.
Methods
2
First of all
a three-dimensional thermal-hydraulic model is built to analyze the temperature distribution of the solid region using the three-dimensional heat conduction model. The solid region includes the graphite moderator
fuel assemblies and reactor vessel. Then the fuel salt in the channel is simulated with the one-dimensional single-phase flow model. The outer salt layer is simulated with either one-dimensional single-phase flow model or three-dimensional laminar flow model
which depends on the blocked situation. Finally
the temperature field and mass flow distribution of the 2MW experimental molten salt reactor is calculated with the thermal-hydraulic model
when the total mass flow in the outer salt layer reduces and the outer salt layer contains local blocked region.
Results
2
The simulation results show that the cooling effect of the outer salt layer is seriously influenced by the total mass flow in the outer salt layer. The results also reveal that the local blocking
a solid region with a diameter of 4 cm (close to the radius of down salt channel) exists in the outer salt layer
in the outer salt layer does not change the temperature field of the reactor obviously.
Conclusion
2
Base on the results
when the total mass flow in the outer salt layer is reduced to 0.365% of the rated mass flow
the maximum temperature of reactor vessel is close to 730 degree celsius
which is near the safety limit of alloy. And if the local blocking situation happens
the maximum temperature of the blocked region reaches 621.74 degree celsius
which is below the safety limit of alloy.
关键词
Keywords
references
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