Optimization and Improvement of Sodium Heated Once-through Steam Generator Transient Analysis Code Based on the JFNK Algorithm

Bo Wang, Zhenyu Feng, Youchun Chen, Dalin Zhang (), Zhiguang Wu, Jun Li, Mingyang Li, Ruoxin Ma and Chao Li
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Bo Wang: State Key Laboratory of Multiphase Flow in Power Engineering, Shaanxi Key Laboratory of Advanced Nuclear Energy and Technology, School of Nuclear Science and Technology, Xi’an Jiaotong University, Xi’an 710049, China
Zhenyu Feng: State Key Laboratory of Multiphase Flow in Power Engineering, Shaanxi Key Laboratory of Advanced Nuclear Energy and Technology, School of Nuclear Science and Technology, Xi’an Jiaotong University, Xi’an 710049, China
Youchun Chen: State Key Laboratory of Multiphase Flow in Power Engineering, Shaanxi Key Laboratory of Advanced Nuclear Energy and Technology, School of Nuclear Science and Technology, Xi’an Jiaotong University, Xi’an 710049, China
Dalin Zhang: State Key Laboratory of Multiphase Flow in Power Engineering, Shaanxi Key Laboratory of Advanced Nuclear Energy and Technology, School of Nuclear Science and Technology, Xi’an Jiaotong University, Xi’an 710049, China
Zhiguang Wu: China Institute of Atomic Energy, Beijing 611731, China
Jun Li: DongFang Electric Co., Ltd., Chengdu 611731, China
Mingyang Li: DongFang Electric Co., Ltd., Chengdu 611731, China
Ruoxin Ma: DongFang Electric Co., Ltd., Chengdu 611731, China
Chao Li: DongFang Electric Co., Ltd., Chengdu 611731, China

Energies, 2023, vol. 16, issue 1, 1-14

Abstract: The sodium heated once-through steam generator (OTSG) is a vital barrier separating sodium and the water loop in the sodium-cooled fast reactor (SFR). In view of the timeliness requirement of OTSG operation performance evaluation, Fortran95 programming language is used to optimize and improve the solution algorithm of the home-made transient analysis code, named TCOSS, for SFR sodium heated OTSG, which is modified into the JFNK algorithm for solving large sparse nonlinear matrices. It includes a matrix preconditioning module, a Krylov subspace formation module, a GMRES algorithm module and an inexact Newton iteration module. The correctness and efficiency of the algorithm model were verified using benchmarks such as the B1-B transient, ETEC shutdown experiments and seven-tube prototype experiments. The calculation speed was increased by more than four times.

Keywords: sodium heated OTSG; JFNK algorithm; thermal hydraulic (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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