The Fusion Evaluated Nuclear Data Library (FENDL) is a comprehensive and validated collection of nuclear cross section data coordinated by the International Atomic Energy Agency (IAEA) Nuclear Data Section (NDS). FENDL assembles the best nuclear data for fusion applications selected from available nuclear data libraries and has been under development for decades. FENDL contains sub-libraries for incident neutron, proton, and deuteron cross sections including general purpose and activation files used for particle transport and nuclide inventory calculations. We describe the history, selection of evaluations for the various sub-libraries (neutron, proton, deuteron) with the focus on transport and reactor dosimetry applications, the processing of the nuclear data for application codes, and the development of the TENDL-2017 library which is the currently recommended activation library for FENDL. We briefly describe the IAEA IRDFF library as the recommended library for dosimetry fusion applications. We also present work on validation of the neutron sub-library using a variety of fusion relevant computational and experimental benchmarks. A variety of cross section libraries are used for the validation work including FENDL-2.1, FENDL-3.1d, FENDL-3.2, ENDF/B-VIII.0, and JEFF-3.2 with the emphasis on the FENDL libraries. The results of the experimental validation showed that the performance of FENDL-3.2b is at least as good and in most cases better than FENDL-2.1. Future work will consider improved evaluations developed by the International Nuclear Data Evaluation Network (INDEN). Additional work will be needed to investigate differences in gas production in structural materials. Covariance matrices need to be updated to support the development of fusion technology. Additional validation work for high-energy neutrons, protons and deuterons, and the activation library will be needed.

翻译：聚变评价核数据库（FENDL）是由国际原子能机构（IAEA）核数据科（NDS）协调开发的综合性且经过验证的核截面数据集合。FENDL汇集了从现有核数据库中精选出的最佳聚变应用核数据，并已历经数十年的发展。该库包含入射中子、质子和氘核截面的子库，涵盖用于粒子输运和核素库存计算的多用途及活化文件。本文阐述了FENDL的历史、针对各子库（中子、质子、氘核）的评价选择（侧重于输运及反应堆剂量学应用）、面向应用代码的核数据处理流程，以及TENDL-2017库（当前推荐用于FENDL的活化库）的开发进展。我们简要介绍了IAEA IRDFF库作为推荐用于聚变剂量学应用的数据库。此外，我们展示了利用多种聚变相关计算与实验基准对中子子库进行的验证工作。验证过程中使用了多种截面库，包括FENDL-2.1、FENDL-3.1d、FENDL-3.2、ENDF/B-VIII.0和JEFF-3.2，重点聚焦于FENDL系列库。实验验证结果表明，FENDL-3.2b的性能至少不劣于FENDL-2.1，且在大多数情况下更优。未来工作将考虑采用国际核数据评价网络（INDEN）开发的改进型评价数据，并需进一步研究结构材料中气体产生的差异。协方差矩阵需要更新以支持聚变技术的发展。此外，还需开展针对高能中子、质子、氘核以及活化库的额外验证工作。