Fission product depletion chain simplification method based on quantitative contribution function

• Published in: Annals of nuclear energy Vol. 171; p. 109015
• Main Authors: Wen, Lili, Wu, Haicheng, Chen, Ying, Shu, Nengchuan, Ge, Zhigang, Wu, Xiaofei
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 15-06-2022
• Subjects: Contribution function; Depletion chain; Fission product; Simplification; Depletion chain; Contribution function; Simplification; Fission product
• ISSN: 0306-4549; 1873-2100
• DOI: 10.1016/j.anucene.2022.109015

•A depletion chain simplification method was proposed based on contribution functions.•Fission rate-weighted-yield was used to consider the energy correlation of fission yield .•The method considers the convenience and feasibility of the simplification process.
Recently, an advanced neutronics lattice code called Kylin-2 has been developed by Nuclear Power Institute of China. In order to develop multi-group library for Kylin-2, a fission product depletion chain simplification method was proposed in this paper to generate burnup data for the multi-group library. This method constructed two quantitative contribution functions based on the thought of transmutation trajectory analysis (TTA), according to these contribution functions, a code was developed to identify important fission product nuclides and then a simplification depletion chain was reconstructed using these important nuclides. Verification and validation showed that this method successfully identifies important fission product nuclides and improve the depletion accuracy.