Abstract: Neutron fluence can be used as an indicator of accelerated irradiation experiments. In order to examine the neutron absorption properties of neutron absorber material by accelerated irradiation, the neutron fluence at different storage time of neutron absorber material was calculated. By studying the initial enrichment and burnup of spent fuel assemblies, spent fuel pool temperature and soluble boron concentration, the envelopment of neutron fluence during the storage in the spent fuel pool was obtained. At the same time, the ¹⁰B consumption at different storage time was calculated. The results show that the neutron absorption properties of the material in the storage of 10-60 a don’t change significantly. The results of this paper can support to examine the neutron absorption properties of material.