摘要
研究堆在物理启动时一般通过棒位外推法得出临界棒位,从而逐步达到临界。但由于控制棒积分价值的非线性,使得这一外推过程不安全或过于偏保守,特别是当临界棒位处于非线性区时。根据点堆模型可导出计数率倒数与Δkeff成正比,若根据积分价值曲线将棒位对应为Δkeff,则可修正控制棒价值非线性的影响。通过研究堆的临界外推数据验证了这一方法的准确性。
Distant extrapolation is usually used during the start-up of the research reactor, by lifting the control rods step by step to reach the critical state. Due to the non-linearity of the integral worth of the control rods, this process was risky or conservative, especially when the rods were positioned in the non-linear region. A formula could be derived from the point reactor model, in which the reciprocal of the count rate was proportional to Δkeff. Together with the integral worth curve of the control rods, the effect of the non-linearity could be corrected. This method was valideted by critical extrapolation data.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2013年第1期101-104,共4页
Atomic Energy Science and Technology
关键词
临界外推
控制棒
积分价值
Critical current density (superconductivity)
Extrapolation
