Thermal Science 2022 Volume 26, Issue 5 Part B, Pages: 4079-4093
https://doi.org/10.2298/TSCI2205079Z
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Severe accident analysis of the dual-functional lithium-lead test blanket module using ISAA-DFLL code
Zhang Bin (School of Nuclear Science and Technology, Xi’an Jiaotong University, Xi’an, Shaanxi, China), binzhang@mail.xjtu.edu.cn
Gao Peng-Cheng (School of Nuclear Science and Technology, Xi’an Jiaotong University, Xi’an, Shaanxi, China)
XU Tao (Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu, China)
Qian Rong-Rong (Ebm-Papst Ventilator (Xi'an) Co. Ltd., Weibei Industry Park, Lintong District, Xi’an, Shaanxi Province, China)
Jing Mao-Lin (Nuclear and Radiation Safety Center, Haidian District, Beijing, China)
Shan Jian-Qiang (School of Nuclear Science and Technology, Xi’an Jiaotong University, Xi’an, Shaanxi, China)
The international thermonuclear experimental reactor (ITER) project aims to
build a tokamak fusion test reactor to verify the feasibility of fusion
reactors. The test blanket module (TBM) is the key component of the
international thermonuclear experimental reactor. The fusion design study
team proposed the concept of the dual-functional lithium-lead test blanket
module (DFLL-TBM). The integral severe accident analysis (ISAA) is a
self-developed ISAA code that models the progression of severe accidents in
nuclear power plants. A broad spectrum of severe accident phenomena
including fission product release and transport behavior is modeled in ISAA.
In this paper, a new version of ISAA, referred to as ISAA-DFLL is
introduced for the application of DFLL-TBM test blanket module into the
treatment of multi fluids and the modules of the new physical property and
heat transfer. The modification is verified by comparing the steady-state
temperature distribution of the DFLL-TBM first wall with the design
parameters. Then accident analysis of In-vessel loss of helium coolant in
first wall and TBM pipe is conducted by using the ISAA-DFLL code. By
comparing the calculation results with the general safety requirements for
TBM, it is concluded that the design of the DFLL-TBM system and the
modifications of the current version are reasonable and accurate.
Keywords: ISAA-DFLL, DFLL-TBM, multi-fluid, loss of coolant accident, accident analysis
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