The Study Of Coolant And Fuel Non-uniform Layout Optimization MCNP Simulation In ADS

The development of nuclear power is more and more rapidly, it will surely becomeimportant in human history as safe and clean energy resources. Countries also successivelyformulated the there nuclear power development planning and put into practice. China alsohas been insisting on developing nuclear power strategy. Some predicted that nuclearpower plants will discharge spent fuel amount to18936tons in2030. Nuclear wastedisposal problems in the human presence. And, spent fuel contain a certain amount of longlife and high radioactive nuclide toxicity. How to dispose of the long life and highradioactive waste is the top priority. It is also the international research of great interest.Transmutation proposed will dispose of the nuclide evolution method. And the acceleratordriven （ADS） evolution reactors recognized by people can be a very good reduce thecontent of these species.This paper studies the cooling agent in ADS and fuel rods of non-uniform s optimizedcombination scheme. The authors used monte carlo simulation method, the Los Alamosnational laboratory of the general development MCNP5program. Establish relevantmathematical model and did a lot of test. The main research contents and achievements in:1According to the practical model, using MCNP5establish1:1scale models.Adjusting proportion of²³⁵U and²³⁹Pu in the fuel rods and simulate the influence ofreactor Keffvalue. And get charts about k value on the influence of different cooling agent.2According to the fast neutron reactor coolant can be divided into different types.According to the ADS of commonly used three kinds of cooling agent monte carlosimulation research. Get the influence about different cooling agent on the neutron energyspectrum, and the line is. One of neutron energy spectrum of liquid sodium affect theminimum, liquid lead most influence.3In the cooling agent stability conditions of fuel module non-uniform layout of theoptimization of the simulation. General of ADS in evolution reactor fuel components areunified arrangement, without any difference. By contrast found that different to changedifferent elements of the quality of the neutron energy spectrum has different effects. Inthis paper, the long life elements to the different proportion of fuel module composition theline simulation, and get the influence diagram. Results showed that⁹⁹Tc quality scorebigger make the biggest influence on neutron spectra and¹²⁹I to neutron spectra affect theminimum.4According to the conclusion of the part3, we can produce two different fuel rods. A ⁹⁹Tc quality score is bigger and²⁴¹Am quality score is bigger. Making fuel rods into twodifferent fuel module. In turn in the central area of the reactor arrangement and peripheralarea and simulation; Contrast the result shows: the²⁴¹Am in central area arrangement,⁹⁹Tcin the peripheral area arrangement of the arrangement of optimization solution is more.The results from two species and neutron reaction change section to explain. To maximizeuse of neutron effect.