کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
295965 511695 2016 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Signal analysis of acoustic and flow-induced vibrations of BWR main steam line
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی مهندسی انرژی و فناوری های برق
پیش نمایش صفحه اول مقاله
Signal analysis of acoustic and flow-induced vibrations of BWR main steam line
چکیده انگلیسی


• Acoustic and flow-induced vibrations of BWR are analyzed.
• BWR performance after extended power uprate is considered.
• Effect of acoustic side branches (ASB) is analyzed.
• The ASB represents a reduction in the acoustic loads to the steam dryer.
• Methodology developed for simultaneous analyzing the signals in the MSL.

The aim of this work is the signal analysis of acoustic waves due to phenomenon known as singing in Safety Relief Valves (SRV) of the main steam lines (MSL) in a typical BWR5. The acoustic resonance in SRV standpipes and fluctuating pressure is propagated from SRV to the dryer through the MSL. The signals are analyzed with a novel method based on the Multivariate Empirical Mode Decomposition (M-EMD). The M-EMD algorithm has the potential to find common oscillatory modes (IMF) within multivariate data. Based on this fact, we implement the M-EMD technique to find the oscillatory mode in BWR considering the measurements obtained collected by the strain gauges located around the MSL. These IMF, analyzed simultaneously in time, allow obtaining an estimation of the effects of the multiple-SRV in the MSL. Two scenarios are analyzed: the first is the signal obtained before the installation of the acoustic dampers (ASB), and the second, the signal obtained after installation. The results show the effectiveness of the ASB to damp the strong resonances when the steam flow increases, which represents an important reduction in the acoustic loads to the steam dryer.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Engineering and Design - Volume 301, May 2016, Pages 189–203
نویسندگان
, , , , , , , ,