Preliminary.
Preliminary.
复制标题
DOI：
10.1037/12411-020
复制
发表时间：
--
期刊：
影响因子：
--
通讯作者：
Herbert Spencer
中科院分区：
文献类型：
--
作者：
Herbert Spencer
为了研究GT-MGR型模块化反应堆的中子物理特性，建立了带加热的ASTRA临界站的计算模型。对支架加热和冷却过程中的反应性输入进行了评估。结果表明，由于内接收器中心存在电加热器，堆芯和外接收器之间存在隔热层，因此在加热和冷却时，反应性的行为将不同。fl内接收器的中心存在电加热器，而外fl接收器之间存在绝热层。发现不同组装区域在积分温度效应中的非平衡贡献。这一效应可用于在临界实验台上进行实验准备。ASTRA临界实验台是用来实验研究含石墨慢化剂和氦冷却剂的高温堆的中子物理参数。
A computational model of the ASTRA critical stand with heating has been prepared for the purpose of studying the neutron-physical characteristics of modular reactors of the type GT-MGR. The reactivity input during heating and cooling of the stand is evaluated. It is shown that the behavior of the reactivity upon heating and cooling will be different because an electric heater is present at the center of the internal re fl ector and a layer of thermal insulation is present between the core and the outer re fl ector. A nonequilibrium contribution of different regions of the assembly in the integral temperature effect is found. It is suggested that this effect can be used in preparation for experiments performed on the critical stand. The ASTRA critical stand is intended for the experimental study of the neutron-physical parameters of high-tem-perature reactors with a graphite moderator and helium coolant.