Application of the hyperfine group self-shielding calculation method to the lattice and whole-core physics calculation. (February 2020)

• Record Type: Journal Article
• Authors: Zu, Tiejun; Yin, Wen; He, Qingming; Liu, Zhouyu
• Is Part Of: Annals of nuclear energy. Volume 136(2020)
• Publication Date: 2020-02
• Subjects: Hyperfine group method -- Lattice physics -- Whole-core physics calculation -- Resonance self-shielding calculation; Nuclear energy -- Periodicals; Nuclear engineering -- Periodicals; 621.4805
• DOI: 10.1016/j.anucene.2019.107045
• Languages: English
• ISSNs: 0306-4549

Abstract

Highlights: A high precision resonance calculation method is proposed. The proposed method realizes the practical application of the hyperfine group method in the lattice and whole-core physics simulations. The proposed method can obtain the correct spatially dependent effective cross sections. Abstract: The hyperfine group method is considered as the most accurate resonance self-shielding method, but it suffers some limitations in the practical calculation due to its long computation time. In order to make it practical to use the hyperfine group method in large scale geometry problems, a cross section interpolation method is proposed in the frame of the newly developed global-local self-shielding method. In this paper, a series of typical 1-D pin cells are established by varying the Dancoff correction factor, burnup depth and fuel temperature. The hyperfine group method is just performed to these typical pin cells, and the cross sections of the realistic pin cells are obtained by interpolating according to the real values of these parameters. By this method, the times of the hyperfine group method needed to be performed is greatly reduced. This method has a very high accuracy in practical assembly and whole-core physics calculation.