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

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 so...

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Published inEnergies (Basel) Vol. 16; no. 1; p. 482
Main Authors Wang, Bo, Feng, Zhenyu, Chen, Youchun, Zhang, Dalin, Wu, Zhiguang, Li, Jun, Li, Mingyang, Ma, Ruoxin, Li, Chao
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.01.2023
Subjects
Accuracy
Algorithms
Benchmarks
Boilers
Design and construction
Design optimization
Efficiency
Eigenvalues
Heat transfer
JFNK algorithm
Mathematical optimization
Nuclear reactors
Optimization
Performance evaluation
Preconditioning
Shutdowns
Sodium
Sodium cooled reactors
sodium heated OTSG
Steam-boilers
thermal hydraulic
China
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Summary: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.
ISSN:1996-1073
1996-1073
DOI:10.3390/en16010482