Determination of radiation direction in environmental monitoring
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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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The assessment of environmental exposure has been performed in Brazil using the thermoluminescence
technique at Thermoluminescence Dosimetry Laboratory (LDT), at Nuclear and Energetic Research Institute
(IPEN/CNEN-SP). To carry out these measurements, several thermoluminscent dosimeters (TLD's) were used
to measure the expose. In this procedure, very few information of direction where the radiation came from is
available. A vague supposition about the direction from where the radiation came from could be inferred only
by evaluation of multiple dosimeters displaced at entire region of monitoring, but this demand to much effort or
sometimes become impractical for certain situations. In this work, a single device is used to provide information
about the direction from where the radiation came through. This device is called directional dosimeter (DD)[1].
Using more than one DD it is possible to reduce the uncertainty of the measurements and determine the
radiation source position. The DD basically consists of a regular solid with high effective atomic number, where
one TLD is positioned at each face. The DD allows evaluating the environmental exposure and the direction of
the radiation by a simple vector sum. At each face of the DD, it is associated an orthogonal vector, and modulus
of this vector represents the correspond exposure measured by the TLD. The direction of the radiation source is
the sum of these faces vectors. The prototype used in this work was a lead cube with six TLDs of
CaSO4:Dy/Teflon. The TLDs have high sensibility and are already used in area, environmental and personal
monitoring. The measurements had shown the correct environmental exposure and a good indication of the
radiation direction.
Como referenciar
CAMPOS, VICENTE de P. de; MOURA, EDUARDO S.; ROCHA, FELICIA D.G.; MANZOLI, JOSE E. Determination of radiation direction in environmental monitoring. 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/123456789/12017. Acesso em: 19 Feb 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.