The space technology has greatly potential and important implication for the country's science ,national defense ,politics ,and economy .To minimize loss in launch and operation , the quality optimization was discussed as an important project in the study of space nuclear reactors .The structure design and optimal parameter design were studied to meet the requirement of space condition and launch condition . The space reactor type and structural plan design were proposed based on research on kinds of space nuclear reactor designs oversea .The engineering design optimization was trans-formed into the solving of a nonlinear integer optimization through mathematical model-ing ,and optimal parameter of the model was obtained in theory by Matlab programming method . The optimization problem was solved by mathematical software , and the important influencing design variables including the quantity of control drum and the radius of reactor core were discussed .The result shows that the total mass of space reactor body decreases by 14.3% compared with the original model ,and the study can improve the further more complicate space nuclear reactor design research .%空间技术是具有重大潜在前景的技术,对国家的科学、国防、政治、经济具有重要意义.为了满足空间条件及发射条件的要求,并使空间核反应堆经济性最大化,对空间核反应堆本体的结构设计方案和参数最优化进行了研究.在调研多种国外空间核反应堆方案设计的基础上,提出了空间核反应堆堆型与堆本体结构设计方案.建立了堆本体数学模型,将设计最优化的工程学问题转化为求解非线性整数优化的数学问题,采用编写M atlab程序语言的方法,利用数学软件求解了最优化问题,在理论上得到了所建立模型的最优化参数设计并探讨了旋转控制鼓数量变化与堆芯燃料半径变化对堆本体总质量的影响.堆本体总质量较初始模型下降了14.3%,为今后完成更进一步的空间核反应堆设计提供了参考.
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