熔盐堆钍铀、铀钚燃料循环核数据不确定度分析  

Uncertainty Analysis of Nuclear Data for Th-U and U-Pu Fuel Cycles in Molten Salt Reactor

作　　者：胡继峰[1,2] 王小鹤 伍建辉[1,2] 蔡翔舟 韩建龙 陈金根[1,2,3] HU Jifeng;WANG Xiaohe;WU Jianhui;CAI Xiangzhou;HAN Jianlong;CHEN Jingen(Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800;CAS Innovative Academies in TMISR Energy System,Shanghai 201800,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院上海应用物理研究所,上海201800 [2]中国科学院先进核能创新研究院,上海201800 [3]中国科学院大学,北京100049

出　　处：《原子能科学技术》2018年第7期1206-1213,共8页Atomic Energy Science and Technology

基　　金：中国科学院TMSR先导专项资助项目(XDA02010000);中国科学院前沿科学重点研究项目资助(QYZDY-SSW-JSC016);国家自然科学基金资助项目(91326201)

摘　　要：反应堆物理设计不确定度是第4代核能系统的QMU(quantification of margins and uncertainties)有效性认证所必须的参数之一,核数据不确定度是其重要来源。基于自主开发的耦合程序BUND(burnup uncertainty of nuclear data),将SCALE程序TRITON和TSUNAMI-3D模块耦合,完成了熔盐堆钍铀燃料循环、铀钚燃料循环核数据引起的有效增殖因数keff不确定度分析,并与ENDF/B-Ⅶ.1协方差数据库计算结果进行了对比。结果显示:初始时刻,两种燃料循环模式下,核数据导致的keff不确定度分别为0.490%和0.582%。随燃耗的增加,核数据引起的keff不确定度增加。寿期末,两种燃料循环模式下,对keff不确定度影响显著增加的反应道分别为239Pu(nubar)、(n,f)、(n,γ)、105 Rh(n,γ)、135 Xe(n,γ)和234 U(n,γ)、143 Nd(n,γ)、131,135 Xe(n,γ)等。Uncertainty of reactor physical design is one of the necessary parameters for the QMU（quantification of margins and uncertainties）validation of the Generation-Ⅳnuclear reactors,and uncertainty of nuclear data is an important source.Using BUND（burnup uncertainty of nuclear data）code to couple TRITON and TSUNAMI-3 D modules of SCALE code,calculations of uncertainties for the effective multiplication factorkeffin the molten salt reactor for Th-U and U-Pu fuel cycles were performed.The results were compared with the calculation results of uncertainty for keffby the covariance data from ENDF/B-Ⅶ.1.It is found that,at the beginning of life,the uncertainties for keff of Th-U and U-Pu fuel cycles are 0.490% and 0.582%,respectively,and they increase with burnup time.At the end of life,reaction channels 239 Pu（nubar）,（n,f）,（n,γ）,105 Rh（n,γ）,135 Xe（n,γ）and 234 U（n,γ）,143 Nd（n,γ）,131,135 Xe（n,γ）are significant for keffuncertainties of U-Pu and Th-U fuel cycles.

关 键 词：核数据不确定度 钍铀燃料循环 铀钚燃料循环 熔盐堆 

分 类 号：TL329[核科学技术—核技术及应用]