Current role of NAA in biological and health-related environmental studiesas exemplified by programs of the IAEA

The International Atomic Energy Agency (IAEA) has many projects and activit ies supporting the utilization of nuclear research reactors for neutron act ivation analysis (NAA). Globally the number of operating nuclear research r eactors has been in decline since about 1975. This contrasts with the situa tion in developing countries where the numbers show a modest increase over the same period. This paper reviews the current status of NAA as seen from the particular perspective of IAEA programs involving studies of biological and environmental specimens. Some of the areas in which NAA is maintaining its role as a competitive technique are briefly reviewed.