Development of TopMC 1.0 for nuclear technology applications

作者：Shanqi Chen, Bin Wu, Zhengyun Dong, Shaoheng Zhou, Guangyao Sun, He Li, Dong Yao, Shengpeng Yu, Quan Gan, Lijuan Hao, Jing Song, Pengcheng Long, Yazhou Li, Jieqiong Jiang, Fang Wang, Liqin Hu, Yican Wu · 发表于：EPJ Nuclear Sciences & Technologies · 年份：2025 · DOI：10.1051/epjn/2024033 · 被引用次数：5 · 研究领域：Nuclear reactor physics and engineering、Nuclear Physics and Applications、Graphite, nuclear technology, radiation studies

Particle transport plays an important role in nuclear technology applications. As a generalized methodology, Monte Carlo is widely employed for particle transport. We investigated several key difficulties in the field, specifically addressing aspects like voxel modeling, coupled photon-electron transportation, and advanced pulse height tallying methodologies. We have developed some essential technologies to enhance the capabilities of the Multi-functional Program for Neutronics Calculation, Nuclear Design and Safety Evaluation (TopMC). This contribution presents the progress in TopMC’s R&D, including the voxel model establishment based on medical image data and fast particle tracking method, an electron transport mechanism grounded in the condensed history approach, and a variance reduction strategy to improve the efficiency of pulse height tallies. Moreover, a series of applications in the nuclear technology field were used to validate and verify TopMC, demonstrating its accuracy and efficiency. TopMC can be applied in particle transport of Boron Neutron Capture Therapy (BNCT), nuclear logging, gamma radiation detection systems, electron accelerator, etc.