Jie HE, Xiaobin XIA, Jun CAI, et al. Temperature field analysis for the main shielding of the 2-MW thorium-based molten salt experimental reactor[J]. Nuclear techniques, 2016, 39(4): 040601
DOI:
Jie HE, Xiaobin XIA, Jun CAI, et al. Temperature field analysis for the main shielding of the 2-MW thorium-based molten salt experimental reactor[J]. Nuclear techniques, 2016, 39(4): 040601 DOI: 10.11889/j.0253-3219.2016.hjs.39.040601.
Temperature field analysis for the main shielding of the 2-MW thorium-based molten salt experimental reactor
以满足反应堆部件材料对辐射限制的要求。温度是影响反应堆主屏蔽性能的重要因素。针对2MWth液态熔盐堆(2-MW liquid-fueled molten salt experimental reactor
TMSR-LF1)
采用MCNP软件获得功率分布后
利用Fluent软件对主屏蔽进行温度场计算。计算过程中利用Python语言编写了程序(MCNP to Fluent
MTF)来实现将MCNP(Monte Carlo N Particle Transport Code)计算结果转换为功率密度的空间分布
以用户自定义函数(User-Defined Function
UDF)形式导入到Fluent
解决了MCNP计算结果不能直接导入到Fluent的问题
并分别计算了TMSR-LF1熔盐堆不同环境温度下的主屏蔽温度场分布情况。结果表明
在环境温度为5℃、18℃、25℃、30℃、35℃、40℃情况下
TMSR-LF1熔盐堆主屏蔽普通混凝土墙温度均低于要求限值
达到设计要求。
Abstract
Background:
2
Molten salt reactor is a fourth generation advanced reactor. The concrete wall is the key part of this high-temperature reactor shielding
so temperature field analysis is important.
Purpose:
2
This study attempts to calculate the temperature field of the TMSR-LF1(2-MW liquid-fueled molten salt experimental reactor) shielding
and judge if it meets the design requirements.
Methods:
2
In accordance with the problem that MCNP(Monte Carlo N Particle Tran
sport Code) results cannot be directly imported into Fluent
a program which converts MCNP results to the spatial distribution of power density
and imports the spatial distribution of power density into the Fluent in the form of User-Defined Function(UDF) was developed by using Python programming language to realize the coupling of the two. According to TMSR-LF1 design parameters
a one-eight physical and thermal model of the whole reactor is established
using code MCNP and Fluent. Reactor radiation shielding thermal analysis adopts the assumptions that the different environment temperatures are 5℃
18℃
25℃
30℃
35℃ and 40℃
respectively.
Results:
2
The maximal values of temperature and temperature gradient in the radiation shielding concrete wall are 67.42℃ and 78.40℃·m
-1
which are lower than limit values.
Conclusion:
2
The radiation shielding concrete wall can meet the design requirements.
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Keywords
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