Capability of processing the GNDS format evaluated nuclear data in NECP-Atlas for neutronics calculations

• Published in: Progress in nuclear energy (New series) Vol. 150; p. 104293
• Main Authors: Huang, Yihan, Zu, Tiejun, Cao, Liangzhi, Wu, Hongchun
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01-08-2022
• Subjects: ENDF-6; ENDF/B-VIII.0; GNDS; NECP-Atlas; Nuclear data processing; Nuclear data processing; NECP-Atlas; ENDF-6; GNDS; ENDF/B-VIII.0
• ISSN: 0149-1970
• DOI: 10.1016/j.pnucene.2022.104293

The Generalized Nuclear Data Structure (GNDS) has been being designed as the replacement of the conventional ENDF-6 format for the evaluated nuclear data libraries. The specification for the GNDS format was released by OECD/NEA in 2020. And the latest evaluated nuclear data libraries ENDF/B-VIII.0 and TENDL2019 were released in the ENDF-6 format and the GNDS format, simultaneously. The capability of processing the GNDS format evaluated nuclear data libraries is developed in the nuclear data processing code NECP-Atlas. To be compatible with the GNDS and ENDF-6 formats, the memory management method and the data structure in NECP-Atlas are modified to support more data beyond the ENDF-6 format. At the same time, a module called GNDS-Toolkit is developed to read, parse and convert the GNDS/XML format libraries. The ENDF/B-VIII.0 library in GNDS/XML format is processed into ACE format and multi-group libraries, and used in criticality calculations, lattice physics calculations and shielding calculations. The results show that the GNDS format libraries can be exactly processed by NECP-Atlas.
•The capability of processing the GNDS format is developed in NECP-Atlas.•Root_Lib is constructed to be compatible with the ENDF-6 and GNDS formats.•The neutronics calculation results based on GNDS agree well with ENDF-6.