HTR-10的燃料管理

Fuel management of HTR-10

建在清华大学的高温气冷实验堆 (HTR- 10 )为球床堆型 ,采用多次循环连续装卸的燃料管理方式。HTR- 10的初始态堆芯由燃料球和石墨球混合组成 ,而平衡态堆芯为单一的燃料球堆芯 ,如何进行燃料管理 ,实现由初始态向平衡态堆芯的过渡 ,是 HTR- 10物理研究中的重要问题。该文研究了一种依据反应性自动调节的燃料管理方式。采用物理设计数字模拟了过渡过程中的燃料管理。结果表明 ,这种燃料管理方式能保证对于排出堆芯外石墨球、未达卸料燃耗水平的燃料球和达到卸料燃耗水平燃料球的区分 ;

The 10 MW high temperature cooled reactor (HTR 10) bulit in Tsinghua University is a pebble bed type of HTGR. The continuous recharge and multiple pass of spherical fuel elements are used for fuel management. The initiative stage of core is composed of the mix of spherical fuel elements and graphite elements. The equilibrium stage of core is composed of identical spherical fuel elements. The fuel management during the transition from the initiative stage to the equilibrium stage is a key issue for HTR 10 physical design. In the paper a fuel management strategy is proposed based on self adjustment of core reactivity. The neutron physical code is used to simulate the process of fuel management. The results show that the graphite elements, the recharging fuel elements below the burn up allowance, and the discharging fuel elements over the burn up allowance could be identified by burn up measurement. The maximum of burn up fuel elements could be controlled below the burn up limit.