Calculation of pin power distributions in fuel subassembly of China Experimental Fast Reactor
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摘要: 在热工中，需要中子学计算给出燃料组件内各元件棒功率的相对分布。利用蒙特卡罗程序对中国实验快堆（CEFR）燃料组件内元件棒功率分布进行了理论计算分析，并保证计算结果相对统计误差小于0.8%。使用另一个基于六角形节块扩散理论的钠冷快堆中子学设计软件NAS计算得到的结果对蒙特卡罗程序计算结果进行了对比计算。结果表明，蒙特卡罗程序与NAS计算得到的元件棒相对功率分布结果的最大相对偏差小于3%。使用蒙特卡罗程序对CEFR燃料组件内精细功率分布的计算是可靠的，可用于设计计算当中。Abstract: Pin power distributions in the China Experimental Fast Reactor(CEFR) should be calculated for thermal hydraulics calculation. Monte Carlo program was used to calculate the pin power distributions and the statistical error of the calculation results is guaranteed to be less than 0.8%. Another program based on nodal diffusion theory, NAS, was used to provide reference for the Monte Carlo results of pin power distributions. It is indicated that the maximum deviation of pin power distributions obtained with the two programs is less than 3%. Thus, application of Monte Carlo program to calculation of pin power distributions in the fuel subassembly of CEFR is credible, and moreover can be generalized to reactor design.
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