研究性重水堆改建后,燃料元件最大热流密度由原来的1×10~6千卡/米~2·时提高到1.7×10~6千卡/米~2·时,而且设计采用的是裸套管的计算公式。星形定位架对临界热流密度有无影响?考虑了该影响后安全系数还有多大?文献中还找不到合适的数据。为此需要进行实验研究, After the reconstruction of the research heavy water reactor, the maximum heat flux density of the fuel element increased from 1 × 10 ~ 6 kcal / m ~ 2 to 1.7 × 10 ~ 6 kcal / m ~ 2 ·, and the design adopted the naked Casing calculation formula. Does the star-shaped spacer have any effect on the critical heat flux density? Considering the magnitude of the safety factor after this influence, there is still no suitable data in the literature. To this end, we need to carry out experimental research,