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- 저자 : Zhulun Li (검색결과 2 건)
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VINUS: A neutron transport solver based on the variational nodal method for reactor core analysis
Li Zhulun,Ma Xubo,Ma Longxiao,Zhang Teng,Du Zhirui 한국원자력학회 2024 Nuclear Engineering and Technology Vol.56 No.10
Compared to traditional transverse integration methods, the variational nodal method, with its unique advantages, is more suitable for high-fidelity calculations of reactor physics in reactors with complex geometries and finer detail descriptions. In this study, the basic theory of the variational nodal method was derived and the VINUS code is developed. The neutron solver based on this method is adaptable to various geometric models, and showcased the code’s fundamental framework. On this basis, a set of self-designed macroscopic cross-section benchmarks, actual macroscopic cross-section benchmark VVER-440, and few-group microscopic cross-section benchmark RBEC-M for fast spectrum reactors were used to verify different functionalities of VINUS. The results were shown that VINUS code maintains good computational accuracy and convergence trends. For the VVER-440 benchmarks, the deviation of keff of VINUS from reference is less than 100 pcm, and the maximum power deviation is less than 4 %. For the RBEC-M, the deviation of keff is 125 pcm, and the maximum power deviation is less than 5 %. These outcomes collectively demonstrate the solver’s potential for engineering applications in future advanced reactor designs.
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Selection of burnable poison in plate fuel assembly for small modular marine reactors
Shikun Xu,Tao Yu,Jinsen Xie,Zhulun Li,Yi Xia,Lei Yao 한국원자력학회 2022 Nuclear Engineering and Technology Vol.54 No.4
Small modular reactors have garnered considerable attention in the recent years. Plate fuel elementsexhibit a good application prospect in small modular pressurized water reactors for marine applications. Further, improved economic benefits can be achieved by extending the core lifetime of small modularreactors. However, it is necessary to realize a large initial residual reactivity for achieving a relatively longburnup depth finally. Thus, the selection of a suitable burnable poison (BP) is a crucial factor that shouldbe considered in the design of small modular reactors. In this study, some candidate BPs are selected torealize the effective control of reactivity. The results show that 231Pa2O3, 240Pu2O3, 167Er2O3, PACS-J, andPACS-L are ideal candidates of BP, and since the characteristics of BP can increase the final burnup depthof assembly, the economic benefits are gained. Additionally, an optimal combination scheme of BPs isestablished. Specifically, it is proved that through a reasonable combination of BPs, a low reactivityfluctuation during the lifetime can be achieved, leading to a large final burnup depth
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