Jurnal Pengembangan Energi Nuklir Vol. 20, No. 1, (2018) 17-24 17 Jurnal Pengembangan Energi Nuklir Laman Jurnal: jurnal.batan.go.id/index.php/jpen Study of Dispersion Hazard Potential of The LPG Stations Around The RDE Site in Rainy and Dry Season Siti Alimah* 1 , June Mellawati 2 1 Center for Nuclear Energy System Assessment, National Nuclear Energy Agency, Kuningan Barat, Jakarta Selatan, Indonesia 2 Center for Technology of Radiation Safety and Metrology, National Nuclear Energy Agency, Lebak Bulus Raya No. 49, Jakarta Selatan, Indonesia ARTICLE INFORMATION ABSTRACT Article History: Received: 22 May 2018 Received in Revised: 8 June 2018 Approved: 10 July 2018 STUDY OF DISPERSION HAZARD POTENTIAL OF THE LPG STATIONS AROUND THE RDE SITE IN RAINY AND DRY SEASON. There are two LPG station (SPPBE) which are the depot of filling, storage and distribution of Liquid Petroleum Gas (LPG) namely PT. BM and PT. ISR which the distance each are 2,995 and 4,141 km from Experimental Power Reactor (RDE) site with capacity 15 and 30 tons. LPG station is a stationary source, which is one aspect of the external human induced events that need to be analyzed in the preparation of site evaluation reports to obtain site permits. Hazard potential that may occur from the depot LPG are fire, explosion and dispersion of hazardous and toxic gas. The release of LPG due to valve leakage which is then dispersed at a certain dose has potentially harmful to health, even death to the population around the RDE site. The purpose of the study was to know the effect of seasons (rainy and dry) to the potential hazard of LPG dispersion from LPG truck tank valve to the around RDE site. The method of study are collection the atmospheric data such as wind direction and speed, temperature and humidity, collection the station LPG characteristic, such as mass of gas, diameter and length of tank, and valve diameter, etc. The atmospheric data was obtained from Pondok Betung Climatology Station, in dry, transition, and rainy seasons, furthermore data was analyzed using ALOHA software version 5.4.5. The results show dispersion from LPG release due to valve leakage from PT. BM and PT. ISR around the RDE site, in the dry season (April), the transition (January and July) as well as the rainy season (October) does not hazardous to the RDE site. Maximum threat zone occurs in dry season at April (wind speed 1.54 m/s), which reaches radius 179 m with airborne LPG concentration 5500 ppm, radius 111 m with concentration 17000 ppm and radius 71 m with concentration 53000 ppm. ABSTRAK STUDI POTENSI BAHAYA DISPERSI DARI STASIUN LPG DI SEKITAR TAPAK RDE PADA MUSIM HUJAN DAN KEMARAU. Terdapat dua stasiun LPG (SPPBE) yang merupakan depo pengisian, penyimpanan dan distribusi Liquid Petroleum Gas (LPG) yaitu PT. BM dan PT. ISR yang jaraknya dari tapak RDE (Reaktor Daya Eksperimental), masing- masing 2.995 dan 4.141 km, dengan kapasitas masing-masing 15 dan 30 ton. Depo LPG adalah sumber stasioner, yang merupakan salah satu aspek kejadian eksternal akibat ulah manusia yang perlu dianalisis dalam penyusunan laporan evaluasi tapak untuk mendapatkan izin tapak. Potensi bahaya yang dapat terjadi dari depo LPG adalah kebakaran, ledakan dan dispersi lepasan gas berbahaya dan beracun. Lepasan LPG karena kebocoran katup yang kemudian terdispersi, pada dosis tertentu mempunyai potensi yang membahayakan kesehatan, bahkan kematian pada populasi di sekitar tapak RDE. Tujuan penelitian adalah mengetahui pengaruh musim (hujan dan kemarau) terhadap potensi bahaya dispersi lepasan LPG dari tangki truk LPG ke sekitar tapak RDE. Metode penelitian meliputi pengumpulan data atmosferik seperti arah angin dan kecepatan angin, temperatur dan kelembaban, serta data karakteristik depo LPG, seperti massa gas, diameter dan panjang tangki, diameter katup, dll. Data atmosferik pada musim hujan, transisi dan kemarau diperoleh dari stasiun klimatologi Pondok Betung. Selanjutnya dilakukan analisis menggunakan software ALOHA versi 5.4.5. Hasil penelitian menunjukkan bahwa dispersi dari lepasan LPG akibat kebocoran katup dari PT. BM dan PT. ISR di sekitar tapak RDE, di musim kemarau (April), transisi (Januari dan Juli) serta musim hujan (Oktober) tidak membahayakan tapak RDE. Maksimum zona ancaman terjadi pada musim kemarau di bulan April (kecepatan angin 1,54 m/s), yang mencapai radius 179 m dengan konsentrasi LPG di udara 5500 ppm, radius 111 m dengan konsentrasi 17000 ppm dan radius 71 m dengan konsentrasi 53000 ppm. Kata kunci: LPG, tapak RDE, potensi bahaya, dispersi, musim hujan dan kemarau Keywords: LPG RDE site Hazard potensial Dispersion Rainy and dry season © 2018 Jurnal Pengembangan Energi Nuklir. All rights reserved 1. INTRODUCTION Fires, explosions and toxicities are the three potential hazards of LPG station (gas filling, storage and distribution). The problem is at a distance of about 3-4 km from the LPG *Correspondence author. E-mail: alimahs@batan.go.id