EVENT FREQUENCY AND CROSS COMPARISON ANALYSIS OF SEISMIC MONITORING SYSTEM FOR REACTOR TRIGA PUSPATI (RTP)

Abstract

ABSTRACT 

The Reactor Digital Instrumentation and Control System (ReDICS) is essential for the monitoring and controlling of the Reactor TRIGA PUSPATI (RTP). It includes a seismic monitoring system that records seismic data, such as time history information and peak ground acceleration levels at the reactor building's ground level. This RTP seismic monitoring system can detect and record spike readings that beyond established threshold values, which will be stored as event data. The R Programming open source used to analyze the stored data and it involves process of data preprocessing, event frequency analysis, and cross-comparison with historical seismic event records in peninsular Malaysia. The data analysis indicates that more than 95% of recorded seismic noise is low and uniform throughout reactor operation hours, demonstrating the monitoring system's sensitivity to anthropogenic activities. Two instances of the monitoring system that had power supply failures have been replaced, resulting in data collection gaps over many intervals. The RTP Seismic Monitoring System data were compared with external sources from MET Malaysia, and the three closest monitoring stations were identified. Out of the 14 known seismic activities, only three were deemed acceptable for comparison. The association between RTP events and MET Malaysia data was minimal, due to system deficiencies including power outages and the lack of notable seismic occurrences. 

ABSTRAK 

Sistem Instrumentasi dan Kawalan Digital Reaktor (ReDICS) adalah penting untuk pemantauan dan kawalan Reaktor TRIGA PUSPATI (RTP). Ia termasuk sistem pemantauan seismik yang merekodkan data seismik, seperti maklumat sejarah masa dan tahap pecutan tanah puncak di aras tanah bangunan reaktor. Sistem pemantauan seismik RTP ini boleh mengesan dan merekodkan bacaan lonjakan yang melebihi nilai ambang yang ditetapkan, yang akan disimpan sebagai data peristiwa. Sumber terbuka Pengaturcaraan R digunakan untuk menganalisis data yang disimpan dan ia melibatkan proses prapemprosesan data, analisis kekerapan kejadian, dan perbandingan silang dengan rekod peristiwa seismik sejarah di semenanjung Malaysia. Analisis data menunjukkan bahawa lebih daripada 95% bunyi seismik yang direkodkan adalah rendah dan seragam sepanjang waktu operasi reaktor, menunjukkan sensitiviti sistem pemantauan terhadap aktiviti antropogenik . Dua contoh sistem pemantauan yang mengalami kegagalan bekalan kuasa telah diganti, mengakibatkan jurang pengumpulan data dalam banyak selang waktu. Data Sistem Pemantauan Seismik RTP telah dibandingkan dengan sumber luar daripada MET Malaysia, dan tiga stesen pemantauan terdekat telah dikenal pasti. Daripada 14 aktiviti seismik yang diketahui, hanya tiga yang dianggap boleh diterima untuk perbandingan. Perkaitan antara peristiwa RTP dan data MET Malaysia adalah minimum, disebabkan oleh kekurangan sistem termasuk gangguan bekalan elektrik dan kekurangan kejadian seismik yang ketara.