Current status and progress of research and development of NAA at GA. Siwabessy reactor

Progress of R and D on Neutron Activation Analysis (NAA) at G.A. Siwabessy research reactor briefly presented in this paper. We describe a current status and research progress that cover of application of NAA technique, a software development and an improvement of laboratory capability. Future program and collaboration plans are also presented. Application of Instrumentation Neutron Activation Analysis (INAA) technique has been used on environmental study to solve a pollution problem, especially for a trace elements determination on water and soil samples. Trace elements determinations have been carried out in Ciliwung river water sample using a combination of INAA and pre-concentration method. River water sample was taken from a five sampling site of Ciliwung River, from Kedung Badak at Bogor area to Marina Beach at Jakarta area. We have been determine some toxic elements such as As, Ag, Mn, Fe, V, Hg, Co and Zn which have quantities depended on sampling site. The analytical results show some elements have quantity higher compare to government regulation value. Soil analysis has been carried out in Puspiptek area using non-destructive method. In this study we applied an enrichment factor to estimate a pollution level of the soil. Meanwhile the software developments have been done to support the environmental study. Examination of this software was done using standard reference materials of NIES CRM 3, NIST SRM 1646a, NIST SRM 1573a and NIST 1648 and we compare our result to a certified value to NIES and NIST. Quantitative analysis results show that elements of Cr, Co, Sb, As, Cd, Mn, Sc, Se, V and Na have a good enough precision and accuracy of about 5-10%. Meanwhile for other elements, such as Hg and Zn, they have a precision and accuracy of about 11-15%. A capability of the NAA laboratory is going to improve by applying a quality system based on ISO/DIS 17025. At present time, we are going ahead with our laboratory accreditation program to obtain international recognition for our laboratories. We also introduce a k0 and PGAA method to develop INAA technique. Some research work have been prepared with Environmental Management Center (EMC) and Osaka University in order to determine trace elements contained on suspended particulate matter at Jakarta Metropolitan area. (author)