中文摘要：

为研究初始富集度为4.95%的新型燃料组件卸料后高密度贮存的可行性,以岭澳核电站3、4号机组乏燃料贮存水池为例,利用SCALE5.1程序系统中基于燃耗信任制的STARBUCS临界计算程序,分析了该新型燃料组件在不同燃耗情况下,锕系核素和裂变产物的产额变化及其对反应性的影响;基于锕系加裂变产物信任水平,计算了燃料组件在不同燃耗深度和不同贮存年限情况下的乏燃料贮存水池临界安全性;给出了乏燃料贮存水池Ⅱ区的参考装载曲线。计算表明：该新型燃料组件在燃耗达到45 GWd.t-1（U）后可以高密度贮存在乏燃料贮存水池Ⅱ区。

英文摘要：

In order to study the spent fuel dense storage feasibility of a new type of fuel assembly with 4.95% enrichment,taking the spent fuel storage pool of Ling’ao Nuclear Power Station Units 3 4 as calculation model,and using the burnup-credit analysis sequence STARBUCS in SCALE5.1 code system,this paper analyzes the yield changes of actinium nuclides and fission products in different burnup conditions as well as its effect on reactivity.Also,based on full burnup credit level,this paper shows the calculation for the critical security of the pool in different burnup levels and storage periods,and also shows the loading curve for spent fuel storage pool region II.The calculation result indicates that this new type of fuel assembly can be densely stored in the spent fuel storage pool region II when its burnup can reach 45GWd.t-1（U）.