舰船用反应堆停堆氙毒特性仿真研究

Simulation of Xenon Poison Characters for Ship Nuclear Reactor

结合船用堆的特点,对核电站反应堆正方形燃料组件堆芯仿真软件进行修改和移植,开发可用于研究船用堆非干净六边形燃料组件堆芯中毒碘坑的堆芯仿真软件。应用该软件,对燃耗为30 MW.d的某反应堆进行了碘坑仿真,并与点模型仿真结果进行了比较。结果表明:点模型的仿真结果偏小,用本软件进行仿真,平衡氙毒计算值与实测值间的偏差为-0.8%,最大氙毒计算值与实测值间的偏差为-4.3%,碘坑计算值与实测值间的偏差为-0.5%。本软件仿真结果符合实际运行规律和物理规律,因此,本软件可准确模拟碘坑中毒,对提高船用堆机动性和安全运行有重要的理论意义和应用价值。

According to the characters of nuclear reactor used in boat, the simulation software for square fuel assembly nuclear reactor used in power plant was transplanted and reworked, and a simulation software for ship hexagon fuel assembly uncleaned nuclear reactor was developed. It was used to simulate the xenon poison in ship nuclear reactor with the burnup of 30 MW · d, and the simulated results were compared with that from point model. It is found that the simulated results of point model are smaller. Besides the deviation between simulated and actual equilibrium xenon reactivities is -0.8%, the deviation is -4.3% for maximum xenon reactivities, and the deviation is -0.5% for iodine well reactivities. The simulated results from present software accurately indicate the characteristics of xenon poison for a ship nuclear reactor.