Observables of MOX spent fuel simulated in Serpent2 for LFR-SMR

Lead-cooled Fast Reactors (LFRs) with mixed-oxide (MOX) fuel are promising candidates in the Gen IV small modular reactor (SMR) landscape due to their capacity for actinides transmutation, passive safety features, and minimized waste radiotoxicity. However, rigorous characterization of spent nuclear fuel (SNF) is essential for secure management, storage, and safeguards research. This is a dataset of isotopic mass densities, spanning 152 isotopes in spent LFR-MOX fuel, additionally providing estimations for activity, decay heat, photon emission, spontaneous fission and radiotoxicity values across various decay steps. Using the Serpent2.2.1 Monte Carlo code for depletion calculations, and processed with SerpentTools, the dataset captures inventory data as a function of power, burnup, the plutonium vector, and decay time, enabling analyses of SNF properties without recalculating depletion cases. The calculations cover a wide range of burn-up levels (from 5 to 150 MWd/KgHM), Pu enrichment (10% to 31%), Power ( from 36.56 to 219.6 W/cm) and Decay (from 1 to a million years). The dataset is stored in Parquet format, including one primary depletion file and 13 decay files.采用混合氧化物（mixed-oxide, MOX）燃料的铅冷快堆（Lead-cooled Fast Reactors, LFRs），凭借其锕系元素嬗变能力、被动安全特性以及显著降低的废物放射毒性，在第四代小型模块化反应堆（Gen IV small modular reactor, SMR）领域极具应用潜力。然而，乏核燃料（spent nuclear fuel, SNF）的严格表征对于其安全管理、储存以及核保障研究而言不可或缺。 本数据集涵盖铅冷快堆-混合氧化物乏燃料中的152种同位素的同位素质量密度，同时提供了各衰变阶段下的活度、衰变热、光子发射、自发裂变以及放射毒性值的估算结果。 本数据集采用Serpent2.2.1蒙特卡洛程序开展燃耗计算，并通过SerpentTools进行数据后处理，收录了随功率、燃耗、钚向量以及衰变时间变化的核素库存数据，可支持无需重新开展燃耗计算的乏核燃料特性分析。 本次计算覆盖了宽泛的参数范围：燃耗水平为5至150 MWd/KgHM，钚富集度为10%至31%，功率范围为36.56至219.6 W/cm，衰变时长为1年至100万年。 数据集以Parquet格式存储，包含1份主燃耗文件与13份衰变文件。