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An experimental study of detection limits and corresponding doses of IRSN in vivo monitoring vehicles in the case of post-accident scenarios

Published online by Cambridge University Press:  26 September 2014

D. Broggio ,
É. Navarro ,
D. Viltard ,
C. Challeton-de Vathaire ,
R. Bô ,
L. Debrose ,
X. Moya  and
D. Franck
D. Broggio*
Affiliation:
IRSN/PRP-HOM/SDI/LEDI, BP 17, 92262 Fontenay-aux-Roses, France.
É. Navarro
Affiliation:
IRSN/PRP-CRI/SESUC/BSPA, BP 17, 92262 Fontenay-aux-Roses, France.
D. Viltard
Affiliation:
IRSN/PRP-HOM/SDI/LEDI, BP 17, 92262 Fontenay-aux-Roses, France.
C. Challeton-de Vathaire
Affiliation:
IRSN/PRP-HOM/SDI/LEDI, BP 17, 92262 Fontenay-aux-Roses, France.
R. Bô
Affiliation:
IRSN/PRP-HOM/SDI/LEDI, BP 17, 92262 Fontenay-aux-Roses, France.
L. Debrose
Affiliation:
IRSN/PRP-HOM/SDI/LEDI, BP 17, 92262 Fontenay-aux-Roses, France.
X. Moya
Affiliation:
IRSN/PRP-HOM/SDI/LEDI, BP 17, 92262 Fontenay-aux-Roses, France.
D. Franck
Affiliation:
IRSN/PRP-HOM/SDI/LEDI, BP 17, 92262 Fontenay-aux-Roses, France.
*
*david.broggio@irsn.fr
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Abstract

The measurement performances of in vivo monitoring vehicles were studied considering an increase in the radiological background in areas where the population is not evacuated after a nuclear accident. The study focused on 137Cs and 131I Detection Limits (DLs) and corresponding doses, for adults and one-year-old children. These DLs for ground contamination were obtained experimentally using a grid of point sources. Then, the DLs and doses were calculated using the experimental data and a safety factor for two accident scenarios. For these scenarios the 137Cs DL corresponds to a committed effective dose of 0.02 mSv. The 131I DL corresponds to committed equivalent thyroid doses of 3 mSv (adult) and 30 mSv (one-year-old child). To guarantee a 45 mSv thyroid equivalent dose assessment for the child the surface activity of 131I + 132I + 133I should be below 1.6 MBq/m2. This study shows that the vehicles can operate in a contaminated area where the population is not evacuated. However, in such a case, the contamination level outside and inside the vehicle should be kept stable to guarantee efficient body counting.

Keywords

in vivo monitoringdetection limitpost-accident managementground contamination
Type
Article
Information
Radioprotection , Volume 49 , Issue 4 , October 2014 , pp. 261 - 268
Copyright
© EDP Sciences, 2014

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