Determination of uranium traces in nuclear reactor IEA-R1 pool water
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HUMBERTO GRACHER RIELLA
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World Journal of Nuclear Science and Technology
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Resumo
IEA-R1 nuclear reactor operation has the routine to control uranium content
in pool water to be in trace range below 50 μg/L. There are several routes to
determine the uranium trace content in water in the literature; voltammetry
has been systematically employed. In the present study, the chosen chemical
determination of uranium traces used the voltammetric method known as
AdCSV (adsorptive cathodic stripping voltammetry). This technique, based
on mercury voltammetry, is an adequate methodology to determine uranium
traces. The chloranilic acid [CAA] (2,5-dichloro-3,6-dihydroxy-1,4-benzoquinone)
is indicated as chelating agent. The redox reaction of 22
UO + with
CAA is sensitive in the range of 2 < pH < 3. But pH variation imposes changing
on [UO2(CAA)2] reduction potential. In this work, we present the uranium
trace results for IEA-R1 reactor water, sampled after an operation routine
shutdown. The uranium trace determination for IEA-R1 pool water
showed content around 1 μg/L [U] with statistical significance. Therefore the
IEA-R1-reactor-water purification showed to be adequate and safe.
Como referenciar
SALIBA-SILVA, ADONIS M.; SANTOS, OLAIR dos; CARVALHO, ELITA F.U. de; RIELLA, HUMBERTO G.; DURAZZO, MICHELANGELO. Determination of uranium traces in nuclear reactor IEA-R1 pool water. World Journal of Nuclear Science and Technology, v. 7, n. 3, p. 155-166, 2017. DOI: 10.4236/wjnst.2017.73014. Disponível em: http://repositorio.ipen.br/handle/123456789/27906. Acesso em: 30 Dec 2025.
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