Laser decontamination of the radioactive lightning rods
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Radiation Physics and Chemistry
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Between 1970 and 1980 Brazil experienced a significant market for radioactive lightning rods (RLR). The
device consists of an air terminal with one or more sources of americium-241 attached to it. The sources
were used to ionize the air around them and to increase the attraction of atmospheric discharges.
Because of their ineffectiveness, the nuclear regulatory authority in Brazil suspended the license for
manufacturing, commerce and installation of RLR in 1989, and determined that the replaced RLR were to
be collected to a centralized radioactive waste management facility for treatment. The first step for RLR
treatment is to remove the radioactive sources. Though they can be easily removed, some contaminations are found all over the remaining metal scrap that must decontaminated for release, otherwise it
must be treated as radioactive waste. Decontamination using various chemicals has proven to be
inefficient and generates large amounts of secondary wastes. This work shows the preliminary results of
the decontamination of 241Am-contaminated metal scrap generated in the treatment of radioactive
lightning rods applying laser ablation. A Nd:YAG nanoseconds laser was used with 300 mJ energy leaving
only a small amount of secondary waste to be treated.
Como referenciar
POTIENS JUNIOR, A.J.; DELLAMANO, J.C.; VICENTE, R.; RAELE, M.P.; WETTER, N.U.; LANDULFO, E. Laser decontamination of the radioactive lightning rods. Radiation Physics and Chemistry, v. 95, p. 188-190, 2014. DOI: 10.1016/j.radphyschem.2013.03.043. Disponível em: http://repositorio.ipen.br/handle/123456789/3996. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.