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Falcao, R.C.; Facure, A.; Santini, E.S.; Silva, A.X.
Associacao Brasileira de Ensaios Nao Destrutivos (ABENDE), Sao Paulo, SP (Brazil); Sociedade Brasileira de Protecao Radiologica, Recife, PE (Brazil)2005
Associacao Brasileira de Ensaios Nao Destrutivos (ABENDE), Sao Paulo, SP (Brazil); Sociedade Brasileira de Protecao Radiologica, Recife, PE (Brazil)2005
AbstractAbstract
[en] In this work, the MCNP code is used to simulate the transport of neutrons in a room of radiotherapy, whose shieldings are designed according to the method of skyshine (scattering in the atmosphere). The simulations are compared with the results obtained from empirically established expressions, which are normally used for designing the ceilings of the rooms facilities, ensuring that dose rates (neutrons + photons) around them do not exceed the maximum limits allowed by the standards of the CNEN. Good agreement is observed between the doses calculated according to these expressions and those obtained through simulation by Monte Carlo in the case of rooms without ceiling, and an overestimate of the calculations by a factor 2 or 3 in relation to the simulations, in the case of rooms with ceiling
Original Title
'Skyshine' de neutrons em projetos de blindagens de radioterapia: comparacao entre abordagem teorica e simulacao por metodo de Monte Carlo
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Source
2005; 7 p; Radio 2005: 4. International congress on radiological protection; Sao Paulo, SP (Brazil); 2-5 Nov 2005; 1. Brazilian congress on radiological protection; Sao Paulo, SP (Brazil); 2-5 Nov 2005
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Miscellaneous
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Conference
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