As the sub-critical reactor of the verification facility “Venus I ” of Accelerator Driven System, the fast-thermal coupling project is introduced in its sub-critical core de- sign. The fast neutron energy spectrum area is composed of natural metal uranium com- ponents, the MA can be transmuted in this area; the thermal neutron energy spectrum area is composed of low density uranium components, the PF can be transmuted in this area. The critical calculation is carried out with 3-D Monte Carlo code （MCNP）. The calculating resul...
