GEANT4 simulation of Radiation Exposure Device scenario at bus stop – Report on simulation and analysis

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Authors
  1. Liu, C.
  2. Waller, D.
Corporate Authors
Defence R&D Canada - Ottawa, Ottawa ONT (CAN)
Abstract
In this report, the performance of a GEANT4 radiation exposure device (RED) application has been investigated. Simulations of the radioactive source, bus passengers, and transport of radiation inside the human body are checked. The simulated results are consistent with expectations, verifying the GEANT4 application for the RED scenario. The absorbed dose rate has been estimated as a function of distance between the source and passengers, and the results have been compared with predictions from RadPro calculator and analytical calculations. GEANT4 works like a realistic scenario simulator in that factors such as the inter-personal shielding and finite body dimension effects have been coherently modelled. The impact of these factors on the dose rate estimation has been investigated and is discussed. As a result, the GEANT4 dose rate results tend to be less than simplified predictions. The verification of the GEANT4 application makes DRDC Ottawa ready for more advanced radiation simulation work in the future. For example, GEANT4 can be utilized to assist ongoing radiation detector design and optimization work, and dose rate results can be used to update the radiological consequences estimated for the Probabilistic Risk Assessment Tool.

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Keywords
radiation exposure device (RED);GEANT4 simulation;cesium 137 decay;cobalt 60 decay;absorbed dose rate;body simulation;passenger simulation at bus stop;radiation;transport;inter-personal shielding;body dimension effect
Report Number
DRDC-OTTAWA-TR-2012-180 — Technical Report
Date of publication
01 Nov 2012
Number of Pages
36
DSTKIM No
CA042355
CANDIS No
803582
Format(s):
Electronic Document(PDF)

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