Dealing with a former rare earth separation facility site (USIN)
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2019
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INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE
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Resumo
São Paulo city has currently 2,224 contaminated lands which are
a t different stages of the environmental
management process. It is possible to find areas developing environmental analysis and investigations, fields
with confirmed risk to human health and w ithout an approved remediation plan, even places during the
remediat ion process and revitalized spaces , which could be an otherwise land use . The USIN facility stopped
their operation in 1992 and was initially used to store minerals and residues from the p rocessing of minerals.
Furthermore, was equipped to process rare earth compounds using solvent extraction techniques, and also store
by product material consisting of 2% of U 3 O 8 and 20% of ThO 2 concentrate . The former facility site consisted
of 3 sheds con structed in an area of 60,000 m 2 located in a past urban industrial district, Campo Grande, in São
Paulo city. Over the years, Campo Grande district was changing its land use, from industrial use to residential
and commercial use, hence the number of resid ences in the neighborhood of USIN has increased. According to
São Paulo Environment Agency (CETESB), USIN’s area was classified as an area with confirmed risk. This
study approach chemical and radiological contaminants present in the area, also the remedia tion actions
adopted. Despite CETESB classification, results indicated than the area has been remediated, a segment of
18,400 m² it was already cleaned up, and the remainder currently is in the remediation process.
Como referenciar
LINO, JULIANA dos S.; AQUINO, AFONSO R. de. Dealing with a former rare earth separation facility site (USIN): case of a contaminated site in São Paulo city, Brazil. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 21-25, 2019, Santos, SP. Proceedings... Rio de Janeiro: Associação Brasileira de Energia Nuclear, 2019. p. 1284-1292. Disponível em: http://repositorio.ipen.br/handle/123456789/30562. 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.