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The multigroup library processing method for coupled neutron and photon heating calculation of fast reactor

  • Teng Zhang (North China Electric Power University, School of Nuclear Science and Engineering) ;
  • Xubo Ma (North China Electric Power University, School of Nuclear Science and Engineering) ;
  • Kui Hu (North China Electric Power University, School of Nuclear Science and Engineering) ;
  • GuanQun Jia (North China Electric Power University, School of Nuclear Science and Engineering)
  • Received : 2023.06.08
  • Accepted : 2023.11.10
  • Published : 2024.04.25

Abstract

To accurately calculate the heating distribution of the fast reactor, a neutron-photon library in MATXS format named Knight-B7.1-1968n × 94γ was processed based on the ENDF/B-VII.1 library for ultrafine groups. The neutron cross-section processing code MGGC2.0 was used to generate few-group neutron cross sections in ISOTXS format. Additionally, the self-developed photon cross-section processing code NGAMMA was utilized to generate photon libraries for neutron-photon coupled heating calculations, including photo-atom cross sections for the ISOTXS format, prompt photon production cross sections, and kinetic energy release in materials (KERMA) factors for neutrons and photons, and the self-shielding effect from the capture and fission cross sections of neutron to photon have been taken into account when the photon source generated by neutron is calculated. The interface code GSORCAL was developed to generate the photon source distribution and interface with the DIF3D code to calculate the neutron-photon coupling heating distribution of the fast reactor core. The neutron-photon coupled heating calculation route was verified using the ZPPR-9 benchmark and the RBEC-M benchmark, and the results of the coupled heating calculations were analyzed in comparison with those obtained from the Monte Carlo code MCNP. The calculations show that the library was accurately processed, and the results of the fast reactor neutron-photon coupled heating calculations agree well with those obtained from MCNP.

Keywords

Acknowledgement

This study was supported by the National Natural Science Foundation of China (No.11875128).

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