【摘要】 本文介绍5MW 低功率堆（5MW LPR）的物理设计。堆芯32盒燃料元件按入堆初始燃耗分三区布置,可提供的总后备反应性△k_eff=0.09084。后备反应性的裕量很大,运行寿期受入堆元件初始燃耗的限制。卸料元件¹⁴⁹Sm 含量的减少释放正的反应性,故在达到平衡氙后的几天里,将会引起控制棒下插。更多还原

【Abstract】 The physical design for 5MW Low Power Reactor is introd-uced in this paper.The spent fuel elements,total 32,were partitio-naly loaded in three zones to take account of their initial burnupdifference.The excess reactivity,△k_eff=0.09084,can be providedwith the loading pattern.The core lifetime is only limited bythe limitation of the fuel burnup becouse of so big excess reac-tivity.In a few days after ¹¹⁵Xe content reached its equilibrium,the control rods will insert partly to cancel the positive reacti-vity released by the ¹⁴⁹Sm consumption.更多还原