The qualitative analysis of vertical seismic acceleration effect on a single nuclear-coupled boiling channel natural circulation loop

Research output: Chapters, Conference Papers, Creative and Literary Works (RGC: 12, 32, 41, 45)32_Refereed conference paper (with ISBN/ISSN)Not applicablepeer-review

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Author(s)

  • Jin-Der Lee
  • Yuh-Ger Lin
  • Shao-Wen Chen
  • Chin Pan
  • Jinn-Jer Peir

Related Research Unit(s)

Detail(s)

Original languageEnglish
Title of host publicationProceedings of the 26th International Conference on Nuclear Engineering (ICONE26)
PublisherAmerican Society of Mechanical Engineers (ASME)
Number of pages11
Volume6A: Thermal-Hydraulics and Safety Analyses
ISBN (Print)9780791851487
Publication statusPublished - Jul 2018

Publication series

NameInternational Conference on Nuclear Engineering
NumberICONE26-81230
Volume2018

Conference

Title26th ICONE – International Conference on Nuclear Engineering (ICONE 2018)
LocationNovotel London West
PlaceUnited Kingdom
CityLondon
Period22 - 26 July 2018

Abstract

Based on the external force method, the present study integrates the nonlinear dynamic model developed previously by the authors with vertical seismic accelerations to investigate the seismic-induced effect on the single nuclear-coupled boiling channel natural circulation loop. The natural frequencies of the states in the stable region are widely explored through nonlinear analysis. The results indicate that the natural frequency of initial state tends to increase as the increase in the phase change number (operating power) or as the decrease in the subcooling number (inlet subcooling). As supposing that a real seismic acceleration is directly imposed on the system, some parametric effects on the seismic-induced oscillations are performed in the present natural circulation loop system. The seismic-induced oscillations are found to be consistent with the combined results of the inherent system stability characteristics and the impact of external seismic acceleration. The system with a larger outlet loss coefficient of the heated channel, or a longer heated channel, would destabilize the seismic-induced oscillations, while the inlet loss coefficient of the heated channel has a stable effect on the system. A much stronger resonance oscillation could be induced by the increase in the core inlet subcooling. Notably, the enlargement and contraction of the heated channel diameter would move the natural circulation system closer to type-I and type-II instability regions, respectively. These both generate unstable effects on the seismic-induced oscillations due to the inherent stability characteristics of the initial states.

Research Area(s)

  • Boiling channel, Natural circulation, Natural frequency, Nonlinear analysis, Seismic acceleration

Citation Format(s)

The qualitative analysis of vertical seismic acceleration effect on a single nuclear-coupled boiling channel natural circulation loop. / Lee, Jin-Der; Lin, Yuh-Ger; Chen, Shao-Wen; Pan, Chin; Peir, Jinn-Jer.

Proceedings of the 26th International Conference on Nuclear Engineering (ICONE26). Vol. 6A: Thermal-Hydraulics and Safety Analyses American Society of Mechanical Engineers (ASME), 2018. V06AT08A019 (International Conference on Nuclear Engineering; Vol. 2018, No. ICONE26-81230).

Research output: Chapters, Conference Papers, Creative and Literary Works (RGC: 12, 32, 41, 45)32_Refereed conference paper (with ISBN/ISSN)Not applicablepeer-review