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）协调建立的综合性、经验证的核截面数据集合。FENDL整合了从现有核数据库中精选出的最佳聚变应用核数据，历经数十年持续开发。该数据库包含中子、质子和氘核入射反应截面子库，涵盖用于粒子输运和核素存量计算的通用文件与活化文件。本文介绍了数据库发展历程、各子库（中子、质子、氘核）评价数据的选择（重点关注输运与反应堆剂量测定应用）、核数据面向应用代码的加工处理，以及当前FENDL推荐活化库TENDL-2017的开发情况。同时简要介绍了IAEA IRDFL库作为聚变剂量测定推荐库的相关工作，并利用多种聚变相关计算与实验基准验证了中子子库。验证工作使用了FENDL-2.1、FENDL-3.1d、FENDL-3.2、ENDF/B-VIII.0和JEFF-3.2等多个截面数据库，重点对FENDL系列库进行验证。实验验证结果表明，FENDL-3.2b的性能至少与FENDL-2.1相当，且在多数情况下表现更优。未来工作将考虑采用国际核数据评价网络（INDEN）开发的改进评价数据，还需进一步研究结构材料中气体产额的差异，更新协方差矩阵以支撑聚变技术发展，并对高能中子、质子、氘核及活化数据库开展补充验证。