Sensitivity evaluation of well-type ionization chamber:A tool to manage spent radioactive sealed sources
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2009
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INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE; MEETING ON NUCLEAR APPLICATIONS, 9th; MEETING ON REACTOR PHYSICS AND THERMAL HYDRAULICS, 16th; MEETING ON NUCLEAR INDUSTRY, 1st
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Resumo
Spent radioactive sealed sources (SRSS), after used in medicine, industry and research, are sent as radioactive
waste to one of the National Nuclear Energy Commission (CNEN) Institutes. Radioactive Waste Management
Laboratory (RWML) of the Nuclear and Energy Research Institute – IPEN-CNEN/SP, among its functions, is
responsible for receiving, treating and storing radioactive wastes generated in all research centers of the IPENCNEN/SP, as well as from other Brazilians institutions. The process of treatment adopted for SRSS is the
withdraw the source from its original shield and transfer it to a standard shield. An important step of this process
is the characterization of the radioactive source. Generally, dose calibrators, commonly used in nuclear medicine
services (NMS), are used to carry out this task. Considering that the radionuclides and the geometries of the
sources to be characterized are different from those used in NMS, it is necessary to evaluate the sensitivity of
this equipment for these kinds of SRSS activity measurements. This study was developed using commercial
standards sources and sources with known activities under responsibility of the RWML, amongst those, 241Am
and 147Pm sources were studied. The results indicate that the sensitivity of the chamber follows typical standard
of punctual sources geometry. However, for other sources there are differences due to the effect of the source
geometry. In such a way what one can find is the regions of higher sensitivity for those kinds of sources, with
acceptable error and confidence level for this end.
Como referenciar
FERREIRA, ROBSON de J.; MINEMATSU, DENISE; DELLAMANO, JOSE C. Sensitivity evaluation of well-type ionization chamber:A tool to manage spent radioactive sealed sources. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE; MEETING ON NUCLEAR APPLICATIONS, 9th; MEETING ON REACTOR PHYSICS AND THERMAL HYDRAULICS, 16th; MEETING ON NUCLEAR INDUSTRY, 1st, September 27 - October 2, 2009, Rio de Janeiro, RJ. Proceedings... Disponível em: http://repositorio.ipen.br/handle/123456789/16523. 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.