钍铀循环专用核数据库

为满足钍基熔盐堆核能系统（TMSR）设计和分析需求，中国核数据中心与上海应用物理研究所合作研制了一套核素种类完整的评价核数据库CENDL-TMSR。CENDL-TMSR包括3个子库，即评价中子数据库（405个核素）、裂变产额数据库（约1100个产物核）、衰变数据库（54个核素）。基于国际核临界安全手册（ICSBEP）中的基准装置，对评价中子数据库进行了宏观检验，结果显示CENDL-TMSR评价中子数据库总体性能与ENDF/B-VII.1相当，部分装置优于ENDF/B-VII.1。 CENDL-TMSR的评价中子数据库是以国际上最新评价中子数据为基础，更新评价了钍铀核燃料循环中的关键数据。其它核素的中子数据则通过微观比对结合宏观检验结果推荐得到。裂变产额数据库基于ENDF/B-VII.1的裂变产额库，更新评价了232Th、233U 、235U 裂变核的15个关键裂变产物核的累积产额数据，更新后数据具有较小的约化开方及较高精度。衰变数据库则基于国内外最新测量数据开展更新评价，澄清了原有数据间的分歧，数据的不确定度更合理；并提供文本格式和ENDF-6格式，可基于互联网、本地等多种方式查找、检索。To meet the design and analysis requirements of the Thorium-based Molten Salt Reactor Nuclear Energy System (TMSR), the China Nuclear Data Center and the Shanghai Institute of Applied Physics jointly developed a comprehensive evaluated nuclear data library CENDL-TMSR with complete nuclide coverage. CENDL-TMSR consists of three sub-libraries: the evaluated neutron data library (covering 405 nuclides), the fission yield data library (with approximately 1100 fission product nuclei), and the decay data library (covering 54 nuclides). The evaluated neutron data library was macroscopically validated against the benchmark installations from the International Handbook of Evaluated Criticality Safety Benchmark Experiments (ICSBEP). The results demonstrate that the overall performance of the CENDL-TMSR evaluated neutron data library is comparable to that of ENDF/B-VII.1, and outperforms ENDF/B-VII.1 on certain benchmark installations. The evaluated neutron data library of CENDL-TMSR is built upon the latest international evaluated neutron data, with updated evaluations of key data in the thorium-uranium nuclear fuel cycle. Neutron data for other nuclides were recommended through microscopic comparisons combined with macroscopic validation results. The fission yield data library is based on the ENDF/B-VII.1 fission yield library, with updated evaluations of the cumulative yield data for 15 key fission product nuclei from the fission nuclides ²³²Th, ²³³U and ²³⁵U. The updated data exhibit smaller reduced chi-square values and higher precision. The decay data library was updated and evaluated using the latest domestic and international measured data, resolving discrepancies among the original datasets and providing more reasonable uncertainty estimations. It is provided in both text format and ENDF-6 format, and supports search and retrieval via multiple channels including the internet and local storage.

搜集汇总

背景与挑战

背景概述

该数据集是为钍基熔盐堆核能系统设计和分析需求研制的专用核数据库，包含评价中子、裂变产额和衰变三个子库，并通过国际基准检验验证了其性能。数据库基于最新评价数据更新了钍铀循环中的关键核数据，并提供多种格式支持查找与检索。