摘要
采用SCIENCE核程序包进行装载方案的设计计算,确定了满足设计准则的各个过渡循环至平衡循环的堆芯。选择合理的平衡循环堆芯燃料的富集度、换料燃料组件数以及各循环的装载和换料方式,使平衡循环达到预定的2 a换料循环长度。堆芯采用低泄漏"内-外"式布置,旧燃料组件布置于堆芯外区。第一循环堆芯,高富集度的组件置于堆芯外区,低富集度的组件排列在堆芯内区。第二循环堆芯装入44个富集度为4.95%的新燃料组件,同时卸出44个旧燃料组件,旧燃料组件布置于堆芯外区。第三循环开始到反应堆寿期内的所有堆芯,都只使用含0、12和20根载钆燃料棒的燃料组件。各循环燃料组件最大卸料燃耗满足设计准则要求。
The calculations of loading patterns （LPs） in each cycle （first cycle, transition cycle and equilibrium cycle） have been completed using the SCIENCE nuclear code package. To meet the requirement of refueling cycle length for 2 years, the enrichment of fuel, the numbers of refueling assemblies and the LPs have been tested. ＇In-out＇ strategic has been used to reduce the neutron leakage. In first cycle, the higher enrichment fuel assemblies （FAs） have been loaded in the outer region of the core, while the lower enrichment FAs have been loaded in the inner region. In cycle 2, 44 fresh FAs （4.95%） have been arranged in the core, 44 old FAs have been discharged, while old FAs have been loaded in the outer region. In cycle 3, only FAs with 0, 12 and 20 Gadolinium rods have been used. As the result, the design criterion for the maximum discharge burnup has been met.
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2008年第2期39-42,共4页
Nuclear Power Engineering
