Accumulation and Distribution of 99 Tc in three Bean Plant Varieties

In nature technetium-99 ( 99Tc) exists in very small amounts as a product of the spontaneous fission of 235U (1). The potencial entrances of 99Tc into the environment are principally arise from the nuclear fuel cycle, which yields high amounts of this isotope by slow neutron fission of 235U and 239pu (6.3 and 6.1 % respectively) (2), and from nuclear weapons, hospitals and research institutions.