C-188 CO-60 sources installation and source rack loading optimization processes in a gamma irradiation facility
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2017
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INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE
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Since 2004, the Multipurpose Gamma Facility at the Nuclear and Energy Research Institute has been providing
services on radiation processing for disinfection and sterilization of health care and disposable medical products
as well to support research studies on modification of physical, chemical and biological properties of several
materials. Recently, there was an increment in irradiation of the Cultural Heritages. This facility uses C-188
double-encapsulated radioactive Cobalt-60 sources kwon as pencils from manufactures outside of country. The
activity of the cobalt sources decays into a stable nickel isotope with a half-life around 5.27 years, which means
a loss of 12.3% annually. Then, additional pencils of Cobalt-60 are added periodically to the source rack to
maintain the required capacity or installed activity of the facility. The manufacturer makes shipping of the
radioactive sources inside a high density container type B(U) , by sea. This one involves many administrative,
transport and radiation safety procedures. Once in the facility, the container is opened inside a deep pool water
to remove the pencils. The required source geometry of the facility is obtained by loading these source pencils
into predetermined diagram or positions in source modules and distributing these modules over the source rack
of the facility. The dose variation can be reduced placing the higher activity source pencils near the periphery of
the source rack. In this work are presented the procedures for perform the boiling leaching tests applied to the
container, the Cobalt-60 sources installation, the loading processes and the source rack loading optimization.
Como referenciar
SANTOS, PAULO de S.; VASQUEZ, PABLO A.S. C-188 CO-60 sources installation and source rack loading optimization processes in a gamma irradiation facility. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017. Disponível em: http://repositorio.ipen.br/handle/123456789/28333. Acesso em: 23 May 2024.
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.