DIAGNOSIS OF REACTOR CORE IMPACT USING WAVELET TECHNIQUE | ||
| ERJ. Engineering Research Journal | ||
| Article 12, Volume 30, Issue 1, January 2007, Pages 109-115 PDF (383.85 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/erjm.2007.69906 | ||
| Authors | ||
| Abdalla. M. Khattab1; Kmbaby I. Mahmoud1; Ornr M. abdelsalam1; Hamdy M. Kelash2; Magdi A. Kotb3 | ||
| 1Atomic Enxg) Autllority Egypt | ||
| 2Faculp of Electron~c Engineering , Minod~ya University | ||
| 3Faculp of Electron~c Engineering | ||
| Abstract | ||
| This paper describes a new method for diagnosis of reactor cores using noise signal processing method. Detection and diagnosis of faults are based on the readings of signals coming from a set of detector tubes, which are surrounded by fuel assemblies in the reactor core. Vibrations of the detector tubes arise from the strong flow of coolant water in the reactor. If the vibration is large enough, the detector tube may impact on the nearby fuel assemblies, which in turn will execute a short, damped oscillation after each hit. This oscillation produces transient in neutron noise signal that is too small to be obselved. The traditional frequency analysis is not an effective tool for finding out transient in non-stationary signal and needs a reference or impact-free signal, that is often impossible to obtain in practical applications. In this work, we suggest a method to detect impact or transient in the signal, using one time the discrete wavelet transform @WT) and in the other an adaptive wavelet filter. The adaptive wavelet filter is found to be very effective in detection of detector vibration and impact problem early before its damage; therefore, the on-line diagnoses of the reactor will detect this error and if necessary alert the operator. The reactor with detector tube impact model is developed using Matlab-Simulink. The results show the effectiveness of the proposed method. | ||
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