Industrial applications of the IEA-R1 research reactor in Brazil
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2017
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INTERNATIONAL CONFERENCE ON APPLICATIONS OF RADIATION SCIENCE AND TECHNOLOGY
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The IEA-R1 is an open pool type research reactor located at theNuclear and Energy Research
Institute (IPEN-CNEN/SP) site and achieved its first criticality on September 16, 1957.
IEA-R1 is the largest research reactor in operation in Brazil, with a core composed of
24 fuel elements with 20% enriched uranium silicide, 4 control rods (AgInCd) and many
irradiation positions supplying thermal neutron fluxes ranging from 1012 to 1014 n/cm2s.
Currently, IEA-R1 is operating at 4:5 MW on an 8 hours per day and 4 days per week cycle.
The IEA-R1 reactor is a multipurpose facility used for basic and applied research in nuclear
and for the production of radioisotopes for industry and nuclear medicine. For industry,
IEA-R1 produces radiotracers and sealed radioactive sources (60Co and 192Ir) for industrial
-radiography, as well as doped silicon by neutron transmutation.
For radiotracer production, IEA-R1 has been working with a compact local staff (3 persons)
and is assisted by the Radiation Technology Centre at IPEN-CNEN/SP, in which there are
installed hot cells for high activity handling. Most of the radiotracers produced at IEA-R1
are irradiated in a quartz bulb inside an aluminium vessel; the only exception is for 41Ar
production, where a special device that doesn’t require a hot cell is used. These are the
radiotracers produced at IEA-R1 and their applications in industry and environment:
• 203Hg: determination of the mercury mass immobilized in electrolytic cells from soda
and chlorine producing industries (46:6 days and 0:28 MeV).
• 131I and 82Br: flow rate measurement and residence time distribution (RTD) studies
in rivers, lakes and wastewater treatment plants (8:04 days and 36 h, 0:36 MeV and
0:55 MeV, respectively).
• 192Ir: environmental studies, in the form of a premixed sand (glass powder plus
activated iridium), to study drag sediment in river (73:8 days and 0:32 MeV).
• 198Au: representative study, in real conditions, of the impact of great civil works for
the construction of important artificial harbour, airport and hydroelectric reservoir,
by labelling sand to be removed from the bottom with emulsion of gold (2:7 days and
0:41 MeV).
• 41Ar and 79Kr: study the gas phase of fluidized cracking catalytic plants (110 min
and 35 h, 1:29 MeV and 0:51 MeV, respectively).
• 140La: study the solid phase (catalysts) of fluidized cracking catalytic plants in
petroleum refineries (40 h, 1:16 MeV).
For doped silicon production, a device that affords the best axial and radial uniformity of
the neutron dose is used. These doping uniformities as well as the doping accuracy are
determined using resistivity values, showing an excellent doping quality.
A recent improvement was the development of an irradiation system to produce gaseous
radioisotopes (41Ar and 79Kr), delivering the activated gases directly into the shield bottle
without handling and dose exposition for operators, instead of via small quantities (batches),
through quartz ampoules containing these noble gases.
Como referenciar
GENEZINI, F.; CALVO, W.A.P.; FERNANDO, A.J.; MARRA NETO, A.; AOKI, P.E. Industrial applications of the IEA-R1 research reactor in Brazil. In: INTERNATIONAL CONFERENCE ON APPLICATIONS OF RADIATION SCIENCE AND TECHNOLOGY, April 24-28, 2017, Vienna, Austria. Abstract... Vienna: IAEA, 2017. p. 255-255. Disponível em: http://repositorio.ipen.br/handle/123456789/27773. Acesso em: 28 Mar 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.