【作者】 郭和伟； 江新标； 赵柱民； 陈立新； 朱养妮； 张信一；

【Author】 GUO He-wei;JIANG Xin-biao;ZHU Yan-gni;MA Teng-yue;ZHANG Xin-yi;CHEN Li-xin;Northwest Institute of Nuclear Technology;

【机构】 西北核技术研究所；

【摘要】 为解决加速器驱动次临界堆嬗变次锕系与长寿命裂片核素的安全性影响问题,本文研究了加速器驱动次临界堆系统（ADS）的基本中子物理学参数问题,而k_eff,k_s和φ^*是三个最基本且最重要的物理量。k_eff是反应堆的特征参数,只与反应堆的组成有关,它表征反应堆的安全。k_s是有外源中子有效增值因数,它除与反应堆组成有关外,还与外源的位置、能谱有关,它表征外源的使用效率,是次临界系统所特有的。φ^*,为外源中子价值,反应了源中子平均价值与裂变中子平均价值之比。利用基准题确定了有外源情况下k_eff和k_s的区别及k_s的算法、燃耗的计算,得到了与国际计算一致的结果,为后续准确计算不同ADS堆型提供了基础。更多还原

【Abstract】 For solving the safe influence problems of the transmutation of Ma and LLFP nuclides of Accelerator Driven Subcritical System,the paper researchs the basic neutron physical parameters.k_eff,k_s and φ^* are three basic physical parameters.The k_eff is an eigenvalue of reactors which represents the safety and which is related to configuration of reactors.The k_s is source multiplication factors which is not only involved in the configuration of rectors but also involved in the position of source and spectrum.It represents the utilization efficiency of source which is its own of ADS.Theφ^* is the importance of external source which defines the ratio of the neutron average of external source to the neutron average of fissionable source.It utilizes IAEA benchmarks to determine the difference of k_eff and k_s in the situation of external source and the way of k_s calculation and burnup calculation.At last,the article calculates k_s and burnup of ADS which is designed based on the setting up calculation ways and gets the reliable results.更多还原