Year: 1967
Type: article
Abstract: The interference effects of the resonance scattering of Na on the resonance absorption of 238U were investigated. The results for self-shielding factor obtained from exact treatment were compared with those from the usual conventional method, as well as with results based on the assumption that φ(u)σt=const. (φ(u): flux, σt: total cross section). In the exact treatment, the neutron spectrum used is obtained with accurate treatment of the slowing down by the elastic scattering of light and medium elements. In the φ(u)σt = const, assumption, the energy dependence of the Na resonance scattering cross section is taken into account as in the exact treatment, whereas only the averaged value is used in the conventional method. Self-shielding factors and their temperature dependence were calculated for several compositions and energy regions. It was found that the conventional method is not satisfactory, while the assumption that φ (u)σt= const, compares well with the exact treatment.
Authors: Tatsuzo TONE, Yukio ISHIGURO, Hideki TAKANO
Institution: Japan Atomic Energy Agency
Language: English
Subfield: Nuclear Energy and Engineering
Field: Energy
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2013985380