POD-RBF Based ROM Method to Calculate Temporal-Spatial Temperature Distribution under DLOFC Accident for VHTR

Ding Yongwang; Zhang Han; Peng Chuzhen; Wu Yingjie; Guo Jiong; Peng Wei; Zhang Ping; Li Fu

doi:10.13832/j.jnpe.2024.10.0056

Volume 46 Issue 2

Apr. 2025

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Article Navigation > Nuclear Power Engineering > 2025 > 46(2): 107-118

Ding Yongwang, Zhang Han, Peng Chuzhen, Wu Yingjie, Guo Jiong, Peng Wei, Zhang Ping, Li Fu. POD-RBF Based ROM Method to Calculate Temporal-Spatial Temperature Distribution under DLOFC Accident for VHTR[J]. Nuclear Power Engineering, 2025, 46(2): 107-118. doi: 10.13832/j.jnpe.2024.10.0056

Citation:

Ding Yongwang, Zhang Han, Peng Chuzhen, Wu Yingjie, Guo Jiong, Peng Wei, Zhang Ping, Li Fu. POD-RBF Based ROM Method to Calculate Temporal-Spatial Temperature Distribution under DLOFC Accident for VHTR[J]. Nuclear Power Engineering, 2025, 46(2): 107-118. doi: 10.13832/j.jnpe.2024.10.0056

Citation:

Ding Yongwang, Zhang Han, Peng Chuzhen, Wu Yingjie, Guo Jiong, Peng Wei, Zhang Ping, Li Fu. POD-RBF Based ROM Method to Calculate Temporal-Spatial Temperature Distribution under DLOFC Accident for VHTR[J]. Nuclear Power Engineering, 2025, 46(2): 107-118. doi: 10.13832/j.jnpe.2024.10.0056

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POD-RBF Based ROM Method to Calculate Temporal-Spatial Temperature Distribution under DLOFC Accident for VHTR

doi: 10.13832/j.jnpe.2024.10.0056

Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, China

Received Date: 2024-10-12
Accepted Date: 2024-11-13
Rev Recd Date: 2024-11-12

Available Online: 2025-01-15

Publish Date: 2025-04-02

Abstract

Abstract

Very High-Temperature Gas-cooled Reactor (VHTR) has a wide range of applications such as hydrogen production by nuclear energy. Depressurized Loss of Forced Cooling (DLOFC) accident is one of the most serious design basis accidents of VHTR. It may cause large computational cost to analyze the DLOFC accident with large amount of different input parameters using the Full Order Model (FOM). Based on Reduced Order Model (ROM), it is of great demand and significance to calculate DLOFC accidents quickly and accurately for different schemes within the design parameters. In this paper, the FOM of VHTR is established by the code TINTE, and a ROM for fast calculation of the DLOFC accident of VHTR is realized based on Proper Orthogonal Decomposition-Radial Basis Function Interpolation (POD-RBF) method. Two methods are given to realize the transient process calculation of ROM. Method 1 equates time with input parameters such as inlet temperature; Method 2 calculates the coefficients of different time steps under the same parameter as a whole. The results show that the maximum relative error of both ROM methods is less than 1%, and the computation efficiency of ROMs is much higher than that of FOM. Furthermore, the computational efficiency of Method 2 is 40 times that of Method 1. Therefore, the ROM proposed in this paper can provide a fast calculation code for the optimization of design parameters of VHTR.

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References(29)

References

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