首次临界是反应堆工程建设中具有里程碑意义的重要节点,标志着反应堆基本建成。中国先进研究堆(CARR)于2010年5月成功实现首次临界,工程建设取得重大进展。CARR是一座轻水冷却重水慢化的反中子阱型反应堆。堆芯由17根标准燃料组件和4根控制棒跟随体组件构成,堆芯布置如图1所示,图中标准燃料组件编号为燃料装载顺序。 The first critical is an important node in the construction of reactor engineering, marking the reactor basically completed. China Advanced Research Reactor (CARR) successfully achieved its first criticality in May 2010 and significant progress was made in its construction. CARR is a light water cooled heavy water moderated anti-neutron trap reactor. The core is composed of 17 standard fuel assemblies and 4 control rod follow-up body assemblies. The core layout is shown in Figure 1, where the standard fuel assembly numbers are the fuel loading sequences.