With the rapid development of economy and the increasing demand for energy

nuclear power has become the only clean energy that can be continuously supplied on a large scale. However

a large number of actinide radionuclides will be produced during the operation of nuclear power plants

and finding a suitable method to dispose of these high-level radioactive materials has become a major difficulty for researchers to overcome. Based on the geochemical simulation software EQ3/6

the existing forms of nuclei Am

Np and Pu in granite fissure water and the effects of pH on these nuclei are studied and discussed in this paper. Then

the experimental data are processed by using the origin 8.0 mapping software

and the effect of pH on the form of nuclides is visually seen. At the same time

this study can provide useful reference and theoretical support for the research of high-level radioactive waste disposal.