I would like to express my thanks to Khon Kaen University for their financial supported. This study was made it possible by supervisors namely Asst. Prof. Turenjai Doolgindachbaporn. I also wish to express my thanks to National Nuclear Energy Agency Indonesia (BATAN Indonesia) co supervisors namely Mrs. Diah Dwiana Lestiani and all staffer consultation for helpful during 5th April – 23th July 2014. I also wish to express my gratitude to Asst. Prof. Muhayatun Santoso for sharing your knowledge with me and co supervisors as well as Dr. Asep Sofyan, in ITB, Indonesia. Finally I would like to thank to my parents, for their support and encouragement throughout my life. I also wish to express my thanks to my friend for helpful and encouragement.