Power Confirming for Critical Facility Based on Activation Method and MCNP Code

The method for power confirming was introduced. Neutron fluence rate distribution and absolute neutron fluence rate of one point for critical facility under different powers were measured by activation method. Neutron fluence rate distribution was calculated with compiled MCNP code. The power of critical facility was calculated with fission rate method based on neutron fluence rate. The power was extrapolated while the max thermal neutron fluence rate was 1×10⁸cm^-2•s^-1. The power confirming for critical facility was completed.