In order to study the feasibility of the fast periodic pulsed reactor with UO2 as fuel (abbreviated as FPPRU), the core models with different load schemes are designed. Neutronic characteristics of two typical design schemes are compared and the better design scheme is determined. The critical search method is established for analyzing the reactor dynamics. Furthermore, the theoretical estimation formula are derived to study the factors affecting the reactor dynamics clearly and intuitively. The reactor dynamics of the fast periodic pulsed reactor with UO2 and PuO2 as fuel are compared. The thermal hydraulics characteristic of FPPRU is studied with sub-channel model. The results show that the design scheme of FPPRU meets the demand of neutronics and thermal hydraulics safety. Meanwhile, the pulse parameters quality of FPPRU with UO2 as fuel is not as good as that of IBR-2 with PuO2 as fuel.

中文翻译：

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UO2燃料快周期脉冲堆可行性研究

为了研究以UO2为燃料的快周期脉冲堆（简称FPPRU）的可行性，设计了不同负荷方案的堆芯模型。比较了两种典型设计方案的中子特性，确定了较好的设计方案。建立了反应堆动力学分析的临界搜索方法。此外，推导了理论估计公式，以清晰直观地研究影响反应堆动力学的因素。比较了以UO2和PuO2为燃料的快周期脉冲反应堆的反应堆动力学。采用子通道模型研究了FPPRU的热工水力特性。结果表明，FPPRU的设计方案满足中子学和热工液压安全要求。同时，