Simple determination of low power on reflected reactors using Feynman- experiment

Feynman-法による反射体付原子炉の低出力の簡単な決定

岡嶋 成晃  ; 成田 正邦*; 小林 圭二*

Okajima, Shigeaki; Narita, M.*; Kobayashi, Keiji*

原子炉の低出力計をFeynman-法を用いて較正するには、1点炉近似より求められた出力と空間補正因子であるg因子との積より求められる。

When a low power meter for a reactor is calibrated by using the Feynman- methode, the absolute power is obtained by the product of the power deduced from the one-point reactor formula and the -factor which was introduced as the spatila correction factor on the Rossi- measurement. In this paper, for the purpose of ezperimental usage, formulae of the -factor for the different geometries are derived by one speed approximation and its characteristics are systematically surveyed. A simple formula of the -factor for a spherical core is presented and applied. This formula can estimate the value of the -factor with appropriate accuracy.