[en] A new module called sab_–calc was implemented into NECP-Atlas, a nuclear data processing code developed at Xi'an Jiaotong University in China, to evaluate the thermal neutron scattering law (TSL), which describes the thermal scattering from bound moderators. Coupling this new module and thermal scattering cross section calculation module, NECP-Atlas can provide accurate thermal scattering cross section for various moderators used in nuclear reactors. In this paper, ZrH₂ was selected as an example to illustrate the function to generate thermal scattering laws and cross sections in NECP-Atlas. The Finite Difference Method (FDM) was applied to calculate crystal force constants, which is transferred to a lattice dynamics code Phonopy to calculate phonon density of state (DOS), which is the basis to evaluate TSL data. The five isotopes of Zr in ε-phase ZrH₂ were treated individually, then a new ACE format library using the evaluated ZrH₂ TSL data in this work was generated. Six benchmarks from International Criticality Safety Benchmark Evaluation Project (ICSBEP) with ZrH_x (x=1.9) moderator were calculated using the Monte Carlo code, and the numerical results show that ε-phase ZrH₂ can provide more precious thermal scattering cross section than the approximated ZrH_x in ENDF/B VIII.0. (author)