The benchmarks in WIMS-D Library Update Project (WLUP) (IAEA) are used to test the accuracy of NECP-Atlas. The calculated benchmarks are summarized in Table 1. In these problems, 64 nuclides are involved in the calculations, including 6 light nuclides, 48 nuclides appearing in cladding and 10 actinides. NECP-Atlas and NJOY2016 are respectively adopted to process different evaluations, and generate WIMS-D format libraries. The energy group structure is WIMS-D 69 group structure. DRAGON5 code is used to calculate the benchmarks.

In the generation of the libraries, the following function modules in NECP-Atlas are used: Recon_calc, Broad_calc, Unres_calc, Therm_calc, Group_calc and WIMS_outp. The differences of results calculated using the libraries generated by NECP-Atlas and NJOY2016. It can be concluded that the results calculated using libraries from NECP-Atlas agree well with those calculated using libraries from NJOY2016. For most of calculated cases, the absolute values of the difference are less than 50 pcm.

Table 1 The WLUP benchmarks used for the verification