PENGUKURAN TINGKAT KEBISINGAN DI ARAE HYDROCREAKER COMPLEX UNIBON REAKTOR UNIT 211 PT PERTAMINA (PERSERO) REFINERY UNIT II DUMAI

Abstract

A research about measurement of the noise level in the Hydrocracker Area Complex Unibon Reactor Unit 211 PT Pertamina RU II Dumai particularly in the area of reactor, pump, and compressorhas been done. The noise level was recorded by direct measurement using two Sound Level Meters (SLM).The noise levels were measured as a function of time and distance. The results show that the highest noise levels occurred in the compressor area that is in the range of 93.685 to 93.689 dBA. While the average noise level that occurs in the area of the reactor, pump, and compressor as a function of time from 08:00 to 15:00 generates almost the same value. But on certain days and certain hours noise levels had a significant fluctuation. These fluctuations were caused by steam leaks in the connections of pipe. The results show that the level of noise as a function of distance from the source towards to the Maintenance and Campo reactor decline with the distance. The decrease in noise levels as a function of distance shown by the slopes of the graphs for maintenance and Campo reactor are -0.9939d+80,087 dan -1,71d+88,25 respectively. This slope indicates that the decrease of noise level for Campo reactor is faster than that in maintenance. This decrease is caused by the presence of sound absorption by vegetation around the area.

Keywords: noise, reactors, pumps, compressors, time, and distance.