Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2010, Vol. 21 ›› Issue (1): 54-59 doi: 10.13538/j.1001-8042/nst.21.54-59

• NUCLEAR ENGINEERING • Previous Articles     Next Articles

Instability of OTSG in movable NPP by using multivariable frequency domain method

HOU Suxia1,2,* TAI Yun1 ZHAO Fuyu1 WEI Xinyu1   

  1. 1 Xi’an Jiaotong University, Xi’an 710049, China 2The Second Artillery Engineering Institute, Xi’an 710025, China
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HOU Suxia, TAI Yun, ZHAO Fuyu, WEI Xinyu. Instability of OTSG in movable NPP by using multivariable frequency domain method.Nuclear Science and Techniques, 2010, 21(1): 54-59     doi: 10.13538/j.1001-8042/nst.21.54-59


The instability occurring in OTSG (Once-Through Steam Generator) of movable nuclear power plants is presented by a multivariable frequency domain theory. As concerning coupling interactions of OTSG tubing, it is more efficient for analyzing the instability of OTSG compared the common single variable method. A mathematical model for the system is derived from the fundamental equations by using the perturbation, Laplace-transform and the nodalization techniques. The stable boundary and parameters which influence the stability of the system are evaluated through computer simulation. Numerical examples are given in the paper and the predictions of the model agree with the experimental results well.

Key words: OTSG, Flow instability, Two-phase flow, Multivariable frequency domain theory