摘要
脉冲源法是确定反应堆次临界度的一种方法,实际应用中,其适用性与脉冲源的时间特性相关。用解析方法推导了脉冲源的后沿时间波形对诊断次临界系统中子学时间常数本征值的影响,并用数值计算进行了验证,明确了脉冲源法诊断次临界系统中子学时间常数时所需满足的外源条件。结果表明,在目前研究关心的时间尺度范围内,脉冲源法适用的目标诊断量的要求是外中子源的时间衰减深度一定要深于装置的次临界度。
The pulsed source method is one of the methods to confirm the time multiplication constant α eigenvalue for a subcritical reactor. Practically its applicability is determined by the characteristic of the neutron source. The analytic and numerical methods were both used to analyze the affect of the temporal characteristic of dense plasma focus source in the pulsed neutron method. The result indicates that the requirement of the temporal characteristic of dense plasma focus source in the pulsed neutron method is ultra fast and ultra short.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2010年第B09期325-328,共4页
Atomic Energy Science and Technology
关键词
次临界
脉冲源
时间增殖常数
subcriticality
pulsed source
time multiplication constant
