Evaluation of burnup calculation for double-heterogeneity system based on Sanchez-MOC framework in LWR. (November 2020)

• Record Type: Journal Article
• Authors: Zhang, Yunfei; Zhang, Qian; Li, Song; Liang, Yuechao; Lou, Lei; Wang, Xiang; Zhao, Qiang; Zhang, Zhijian
• Is Part Of: Annals of nuclear energy. Volume 147(2020)
• Publication Date: 2020-11
• Subjects: Sanchez-MOC -- Burnup calculation -- FCM fuel -- Double heterogeneity -- Spatial discretization; Nuclear energy -- Periodicals; Nuclear engineering -- Periodicals; 621.4805
• DOI: 10.1016/j.anucene.2020.107668
• Languages: English
• ISSNs: 0306-4549

Abstract

Highlights: The burnup capability is developed in the DH lattice code ALPHA. A combination strategy of discretization is adopted in ALPHA. The effect of burnup region spatial discretization for FCM fuel is analyzed. Abstract: Burnup capability is developed on the ALPHA code with Sanchez-Pomraning MOC (Sanchez-MOC) approach for FCM fuel design. To better model the double heterogeneity (DH) of FCM fuel, ALPHA adopts a combination strategy of macroscopic discretization at pin level and microscopic discretization at particle level for burnup region. The burnup capability is validated by code-to-code comparison with Serpent for FCM fuel. In addition, the effect of spatial discretization of the burnup calculation on the macroscopic and microscopic level is analyzed. In this work, it is suggested that the FCM pin cell without poison or containing Er2 O3 should implement the macroscopic 5-ring and microscopic non-discretization scheme. For B-bearing and Gd-bearing FCM pin cell, the macroscopic burnup region should reach 5 rings and 8 rings respectively, and their microscopic burnup region both require 2 regions.