【摘要】 裂变气体产物的积累会造成燃料元件失效,本文主要利用蒙特卡罗燃耗计算程序RMC对热管式空间快堆UN燃料精细化燃耗和放射性核素的产生进行了计算,研究了空间堆的精细燃耗分布以及UN燃料中裂变气体(主要是Xe和Kr)的积累随运行时间的变化规律。结果表明:百千瓦热管式锂冷空间堆过剩反应性满足7年不换料要求,寿期末的燃料与包壳之间的压强不足以造成燃料元件的破损,整个寿期空间堆燃料处于安全可靠的状态。更多还原

【Abstract】 Fission product gas accumulation can cause the failure of fuel elements.Calculations were conducted using Monte Carlo depletion code RMC to study the hyperfine depletion and radioactivity of heatpipe space reactor in this paper. The hyperfine depletion as well as the fission product gas(mainly includes Kr and Xe)varying with time was analyzed.These simulations revealed that the kilo-power heat-pipe space reactor exhibited abundant reactivity to fulfill its seven-year burn-up without refueling. Fission gas pressure between fuel and cladding could not cause the failure of fuel elements. Reactor was in the safe margin throughout the whole life.更多还原