Evolution of dispersed fuel used for research and test reactors
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Engenharias: desafios e soluções nas múltiplas fronteiras do conhecimento
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Resumo
Currently, 222 research
reactors are operating in 53 countries in
Brazil, four units. Nuclear fuel type used in
research reactors depends on the thermal
power level, classified by power classes,
such as critical and subcritical units
operating below 1Kw, working from 1 kW
to 1 MW, and over 1 Mw, being 28 facilities
operating on a medium power spectrum
from 1 MW up to 10Mw. Alternatively,
they divided the research reactor into lowenriched uranium below 20% of U-235 and
highly-enriched uranium over this limit. In
the 1950s, the superheat section of the Fifth
Boiling Reactor Experiment (BORAX-V)
used enriched uranium (93 wt.% U-235) as
uranium dioxide in a matrix of stainless steel.
In sequence, it divided a fast dispersion
fuel evolution into three ages. The 1950s
predominated U–Al alloy. In the 1960s, the
U3
O8
–Al and UAlx
-Al followed the 1980s,
focusing on high uranium density up to 4.8
gU/cm3
planned to U3
Si2
-Al and U10Mo/Al.
Today, global research focuses on U-10Mo
dispersion and monolithic forms. Many
thermal physical features of dispersed fuels
can help define the application field, mainly
focused on neutron activation analysis and
radiopharmaceutical production.
Como referenciar
GOMES, D.S. Evolution of dispersed fuel used for research and test reactors. In: OLIVEIRA, ANTONELLA C. de (ed.); HOLZMANN, HENRIQUE A. (org.); BILCATI, GÉSSICA K. (org.). Engenharias: desafios e soluções nas múltiplas fronteiras do conhecimento. Ponta Grossa, PR: Atena, 2024. , cap. 20. p. 275-286. DOI: 10.22533/at.ed.64224240420. Disponível em: https://repositorio.ipen.br/handle/123456789/48767. Acesso em: 20 Jan 2026.
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.