CAJ | 학술논문

采用计算流体力学（C FD ）方法对行波堆燃料组件7棒束、19棒束及37棒束模型进行计算分析，发现行波堆燃料组件内冷却剂温度随轴向高度增加逐渐升高的同时具有逐渐向中心区域聚集的效应，组件出口区域垂直于流动方向的截面冷却剂温度分布差别很大，对边距约为26 cm的组件中心区域与外围区域最大温差超过100℃。组件内较大的冷却剂温度梯度主要出现在组件最外两圈燃料棒及组件盒之间的区域，而其他区域温度梯度较小，该结论可初步推广到有217根燃料棒的行波堆燃料组件。现有行波堆燃料组件结构需进一步优化。
채용계산류체역학（C FD ）방법대행파퇴연료조건7봉속、19봉속급37봉속모형진행계산분석，발현행파퇴연료조건내냉각제온도수축향고도증가축점승고적동시구유축점향중심구역취집적효응，조건출구구역수직우류동방향적절면냉각제온도분포차별흔대，대변거약위26 cm적조건중심구역여외위구역최대온차초과100℃。조건내교대적냉각제온도제도주요출현재조건최외량권연료봉급조건합지간적구역，이기타구역온도제도교소，해결론가초보추엄도유217근연료봉적행파퇴연료조건。현유행파퇴연료조건결구수진일보우화。
Thermal-hydraulic characteristics of reacting zone for TWR (travelling wave reactor) bundles were analysed by CFD method .The calculation results of 7 ,19 and 37 fuel pin bundles show the similar characteristics .The hot coolant seems to congregate into the centre as flowing to the downstream area .The high temperature coolant always distributes in the inner area w hile the temperature show s distinct gradation in the outer area .T he temperature difference is more than 100 ℃ for the bundle w hose diameter is about 26 cm .The major temperature gradations mainly locate in the outermost fuel rods of two circles while other circles show much smaller temperature gradients . This conclusion is estimated to be true for more fuel pin bundles such as 217 fuel pin bundles . The fuel assembly structure of the existing TWR design should be optimized in future .