本申请实施例公开了一种氦氙冷却反应堆、反应性控制评价方法、装置及设备,该氦氙冷却反应堆包括：堆芯及抽拉式反射层；抽拉式反射层包括多个可抽拉的反射块,多个可抽拉的反射块沿堆芯的轴向方向设置于堆芯的外侧；至少一个可抽拉的反射块可沿堆芯的轴向方向移动,以改变抽拉式反射层的反射效果。本申请实施例采用可沿堆芯的轴向方向移动的抽拉式反射层,一方面减少了结构相对复杂的控制鼓及其驱动机构,节约了制造成本及占用空间；另一方面,相对紧凑方便的抽拉式设计,控制简单方便,避免了掉鼓卡鼓等故障隐患,控制方式更为安全高效,且对优化并提升反射层微分价值更为有利。

Embodiments of the present application disclose a helium-xenon cooled reactor, a reactivity control evaluation method, a device, and an apparatus, the helium-xenon cooled reactor comprising: a core and a pull-out reflective layer; the pull-out reflective layer comprising a plurality of pull-out reflective blocks, the plurality of pull-out reflective blocks being disposed along an axial direction of the core on an outer side of the core; and at least one of the pull-out reflective blocks being movable along the axial direction of the core to change a reflection effect of the pull-out reflective layer. reflection effect of the reflective layer. This embodiment of the present application adopts a pull-out reflective layer that can be moved along the axial direction of the core, which on the one hand reduces the relatively complex structure of the control drum and its driving mechanism, and saves manufacturing cost and occupied space; on the other hand, the relatively compact and convenient pull-out design is simple and easy to control, avoids the potential danger of failures such as dropping drums and jamming drums, and the control mode is more secure and efficient, and more advantageous for optimising and enhancing the differential value of the reflective layer. The control method is safer and more efficient, and more favourable to optimise and enhance the differential value of the reflective layer.