Choice of nuclear data library(ies)

[OceanNuclear]

Each nuclear data libraries has its strength and weaknesses, and not all are equally accurate.
For example, TENDL is the most complete library, but is based on the output of TALYS (a nuclear model code system), so some cross sections may not be as close to experimentally measured values as some modellers/designers would like; meanwhile, IRDFF-II is less comprehensive, but each cross-section is

A quite dramatic example of how these nuclear data differs in the fusion-relevant ranges of energies is shown in https://www.epj-conferences.org/articles/epjconf/pdf/2020/15/epjconf_nd2019_21003.pdf (doi here). (Although, one must bear in mind that this paper looks at nuclear data discrepancy in the context of activation foil simulation and unfolding, which is likely to be more severe than in the context of whole-reactor-simulation).

At the moment, I don't have a strong opinion about which nuclear data library we should be using. Open to suggestions and discussions below.

[OceanNuclear]

For the record, bluemira currently (v2.4.0) uses ENDF-BVII and TENDL.

Perhaps it would be worth adding the option to use FENDL?