压水堆相邻燃料棒间的高阶共振干涉现象研究
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摘要
针对压水堆中不同燃料类型相邻的燃料组件中的出现的高阶共振干涉现象进行了研究。通过超细群求解慢化方程和嵌入式共振计算方法,对该类问题进行了计算。通过对精细能谱形状和多群共振截面计算误差的分析,结果表明,高阶共振干涉现象随着慢化剂密度降低而增强,对共振计算的精度有一定的影响。在二氧化铀(UO2)与钚铀氧化物混合燃料(MOX)的混合组件中,截面的最大相对误差达10%。通过对嵌入式共振计算方法进行改进,可以有效地处理该共振干涉现象,提高具有复杂设计的燃料组件的共振计算精度。结果表明,在多种工况下的多燃料混合组件中,共振截面的相对误差降低至3%以下。
In the fuel assmebly of the presurized water reactor, the high-order resonance interference effect between adjacent fuel rods of different fuel types is studied. Based on the method of solving ultra-fine-group slowing-down equation and the embedded resonance calculation method, the specific type of problems is calculated. Numerical results show that the high-order resonance interference effect increases with the reduction of the moderator density and has some influence on the precision of resonance calculation. The maximum relative cross section error reaches 10% in the fuel assembly mixed with uranium dioxide fuel and plutonium uranium oxide fuel. By improving the embedded resonance calculation method, the high-order resonance interference phenomenon can be treated effectively, and the resonance calculation precision of the fuel assembly with complex design can be improved. Results show that the relative error of the resonant section is reduced to less than 3% in the multi-fuel mixing components under various working conditions.
In the fuel assmebly of the presurized water reactor, the high-order resonance interference effect between adjacent fuel rods of different fuel types is studied. Based on the method of solving ultra-fine-group slowing-down equation and the embedded resonance calculation method, the specific type of problems is calculated. Numerical results show that the high-order resonance interference effect increases with the reduction of the moderator density and has some influence on the precision of resonance calculation. The maximum relative cross section error reaches 10% in the fuel assembly mixed with uranium dioxide fuel and plutonium uranium oxide fuel. By improving the embedded resonance calculation method, the high-order resonance interference phenomenon can be treated effectively, and the resonance calculation precision of the fuel assembly with complex design can be improved. Results show that the relative error of the resonant section is reduced to less than 3% in the multi-fuel mixing components under various working conditions.
引文
[1]张乾,吴宏春,曹良志,等.嵌入式自屏方法研究[J].现代应用物理,2014,5(4):290-293.
[2]Liu Z,He Q,Wen X,et al.Improvement and optimazation of the pseudo-resonant-nuclide subgroup method in NECP-X[J].Progress in Nuclear Energy,2018,103:60-73.
[3]祖铁军,张乾,吴宏春,等.基于广义等价理论的高保真共振计算方法[J].强激光与粒子束,2017,29(06):066001.
[4]贺清明,曹良志,吴宏春,等.能精确处理空间自屏效应的共振伪核素子群方法[J].强激光与粒子束,2017,29(01):29016006.
[5]Zhang Q,Zhao Q,Yang W S,et al.Modeling of Resonance-Interference Effect in Depleted Fuel Compositions by Pseudo Resonant Isotopes[J].Nuclear Science and Engineering,2018,191(1):46-65.
[6]Chawla R,Gmür K,Hager H,et al.Reactivity and reaction rate ratio changes with moderator voidage in a light water high converter reactor lattice[J].Nuclear Technology,1984,67(3):360-380.
[7]Stamm'ler R J J,Abbate M J.Methods of steady-state reactor physics in nuclear design[M].London:Academic Press,1983.
[8]Williams M L.Correction of mubtigroup cross sections for resolved resonance interferentce in mixed absorbers[J].Nuclear Science and Engineering,1983,83(1):37-49.
[9]Team M C.MCNP-a general purpose monte carlo n-particle transport code version 5:la-ur-03-1987,technical report[R].N M,USA:Los Alamos National Laboratory,2003.
[10]Zhang Q,Zhao Q,Zhang Z,et al.Improvements of the embedded self-shielding method with pseudo-resonant isotope model on the multifuel lattice system[J].nuclear science and engineering,2018,192(3):311-327.
[2]Liu Z,He Q,Wen X,et al.Improvement and optimazation of the pseudo-resonant-nuclide subgroup method in NECP-X[J].Progress in Nuclear Energy,2018,103:60-73.
[3]祖铁军,张乾,吴宏春,等.基于广义等价理论的高保真共振计算方法[J].强激光与粒子束,2017,29(06):066001.
[4]贺清明,曹良志,吴宏春,等.能精确处理空间自屏效应的共振伪核素子群方法[J].强激光与粒子束,2017,29(01):29016006.
[5]Zhang Q,Zhao Q,Yang W S,et al.Modeling of Resonance-Interference Effect in Depleted Fuel Compositions by Pseudo Resonant Isotopes[J].Nuclear Science and Engineering,2018,191(1):46-65.
[6]Chawla R,Gmür K,Hager H,et al.Reactivity and reaction rate ratio changes with moderator voidage in a light water high converter reactor lattice[J].Nuclear Technology,1984,67(3):360-380.
[7]Stamm'ler R J J,Abbate M J.Methods of steady-state reactor physics in nuclear design[M].London:Academic Press,1983.
[8]Williams M L.Correction of mubtigroup cross sections for resolved resonance interferentce in mixed absorbers[J].Nuclear Science and Engineering,1983,83(1):37-49.
[9]Team M C.MCNP-a general purpose monte carlo n-particle transport code version 5:la-ur-03-1987,technical report[R].N M,USA:Los Alamos National Laboratory,2003.
[10]Zhang Q,Zhao Q,Zhang Z,et al.Improvements of the embedded self-shielding method with pseudo-resonant isotope model on the multifuel lattice system[J].nuclear science and engineering,2018,192(3):311-327.