A MIXED CORE FOR SUPERCRITICAL WATER-COOLED REACTORS
A MIXED CORE FOR SUPERCRITICAL WATER-COOLED REACTORS
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DOI：
10.5516/net.2008.40.2.117
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发表时间：
2008-03
影响因子：
2.7
通讯作者：
Xu Cheng;Xiaojing Liu;Yanhua Yang
中科院分区：
文献类型：
--
作者：
Xu Cheng;Xiaojing Liu;Yanhua Yang
在本文中，一个新的反应堆堆芯设计的基础上，一个混合的核心概念，包括一个热区和一个快速区。热区燃料组件的几何结构类似于常规热超临界水冷堆（SCWR）堆芯，在慢化剂通道之间具有两个燃料棒排。尽管是逆流流动模式，但并流流动模式用于简化反应堆堆芯和燃料组件的设计。热区出口处的水温远低于压力容器出口处的水温。该较低的温度降低了热区的最大包层温度。此外，由于快区的高速度，可以在燃料组件中使用更宽的网格，并且可以最小化局部热传递的不均匀性。这种混合堆芯结合了一些现有的热SCWR堆芯和快速SCWR堆芯的优点，提出了进一步的详细分析。
In this paper, a new reactor core design is proposed on the basis of a mixed core concept consisting of a thermal zone and a fast zone. The geometric structure of the fuel assembly of the thermal zone is similar to that of a conventional thermal supercritical water-cooled reactor (SCWR) core with two fuel pin rows between the moderator channels. In spite of the counter-current flow mode, the co-current flow mode is used to simplify the design of the reactor core and the fuel assembly. The water temperature at the exit of the thermal zone is much lower than the water temperature at the outlet of the pressure vessel. This lower temperature reduces the maximum cladding temperature of the thermal zone. Furthermore, due to the high velocity of the fast zone, a wider lattice can be used in the fuel assembly and the nonuniformity of the local heat transfer can be minimized. This mixed core, which combines the merits of some existing thermal SCWR cores and fast SCWR cores, is proposed for further detailed analysis.