船用反应堆堆芯精细功率重构计算

Reconstruction Calculation of Pin Power for Ship Reactor Core

针对现有船用反应堆安全分析仿真软件不能计算堆芯精细功率分布这一缺陷,开展了堆芯径向和轴向精细功率分布重构计算和分析。采用三次样条插值法对轴向精细功率进行重构计算,采用双线性和双三次插值法对径向精细功率进行重构计算,并与采用细网差分的专业物理程序的计算结果进行比较。结果表明,本工作精细功率重构计算简单、可靠,有较高的精度,对船用反应堆安全运行分析和监督管理具有重要的参考价值。

Aiming at the limitation of the software that pin power distribution for ship reactor core was unavailable, the calculation model and method of the axial and radial pin power distribution were proposed. Reconstruction calculations of pin power along axis and radius was carried out by bicubic and bilinear interpolation and cubic spline interpolation, respectively. The results were compared with those obtained by professional reactor physical soft with fine mesh difference. It is shown that our reconstruction calculation of pin power is simple and reliable as well as accurate, which provides an important theoretic base for the safety analysis and operating administration of the ship nuclear reactor.