Abstract:

Refueling method is essential for the economy and safety of reactor. By Monte Carlo method, physical model of miniature reactor was built by MCNP software. Accurate physical calculating model of fuel, coolant, reactor core and reflector were built accordingly. The effective valueadded of refueling after the core factor keff, neutron energy distribution and neutron flux density radial distribution of physical quantity calculation, analysis and calculation at the same time focus on core power density distribution. Draw up the core power density distribution of threedimensional figure, summarizes the power density distribution. By a series physical calculation and summarization of data, the reference for reactor core improvement and effect of refueling method for reactor core power was indicated.

Key words:

miniature reactor, refueling, Monte Carlo method, physical analysis, power calculation