TXMAT2.0 is an in-house code for processing neutron and photon cross sections from the MATXS format nuclear library, which provides multi-group macroscopic cross sections for transport and diffusion calculations. In developing the program, three improvements have been made in the code. First, TXMAT2.0 adopts Fortran2003 based on object-oriented programming techniques and uses allocatable memory management techniques. Second, TXMAT2.0 is capable of processing the ultrafine group (2082 groups) library using these memory management techniques; in comparison, the officially released TRANSX2.15 has difficulty with this task. Finally, TXMAT2.0 handles correctly self-shielding corrections for light nuclides such as 12C, 16O, whereas TRANSX 2.15 experiences problems. In performing the verification and validation of TXMAT2.0, ICSBEP benchmarks for criticality verification, and OKTAVIAN and IPPE benchmarks for shielding verification were selected. Several results were compared with results obtained from TRANSX2.15 as well as with experimental data. The results show that the accuracy of TXMAT2.0 is as good as TRANSX2.15. Moreover, TXMAT2.0 provides accurate neutron and photon cross sections for multi-group transport calculations. In addition, through the verification of a self-designed benchmark, TXMAT2.0 processes effectively and correctly self-shielding problems of light nuclides.

TXMAT2.0 是一个内部代码，用于处理来自 MATXS 格式核库的中子和光子截面，它为传输和扩散计算提供多组宏观截面。在开发该程序时，对代码进行了三处改进。首先，TXMAT2.0采用基于面向对象编程技术的Fortran2003，采用可分配内存管理技术。其次，TXMAT2.0 能够使用这些内存管理技术处理超细组（2082 组）库；相比之下，正式发布的TRANSX2.15在这个任务上就有些难度了。最后，TXMAT2.0 正确处理轻核素（如 12C、16O）的自屏蔽校正，而 TRANSX 2.15 遇到问题。在进行TXMAT2.0的验证和确认时，选择了 ICSBEP 用于关键性验证的基准，以及用于屏蔽验证的 OKTAVIAN 和 IPPE 基准。一些结果与从 TRANSX2.15 获得的结果以及实验数据进行了比较。结果表明，TXMAT2.0的精度与TRANSX2.15一样好。此外，TXMAT2.0 为多群输运计算提供准确的中子和光子截面。此外，TXMAT2.0通过自行设计的benchmark验证，有效正确地处理了轻核素的自屏蔽问题。0 为多组传输计算提供准确的中子和光子截面。此外，TXMAT2.0通过自行设计的benchmark验证，有效正确地处理了轻核素的自屏蔽问题。0 为多组传输计算提供准确的中子和光子截面。此外，TXMAT2.0通过自行设计的benchmark验证，有效正确地处理了轻核素的自屏蔽问题。