Assessment of Cs-137, Am-241, and Cf-252 in Well Logging.
Journal
Health physics
ISSN: 1538-5159
Titre abrégé: Health Phys
Pays: United States
ID NLM: 2985093R
Informations de publication
Date de publication:
01 07 2021
01 07 2021
Historique:
pubmed:
7
3
2021
medline:
12
3
2022
entrez:
6
3
2021
Statut:
ppublish
Résumé
This paper assesses radiation exposures resulting from 137Cs, 241Am, and 252Cf during well logging incidents. Based on a hypothetical rupture incident, the computer code RESRAD-OFFSITE is run for both offsite and onsite exposure locations. The absorbed doses are compared among three radioactive sources. The adverse health and environmental impact of 241Am is higher than the impact from the other two radioactive sources (137Cs and 252Cf) due to its relatively long half-life and radioactive progeny. The serious impact of 241Am will appear many years after its abandonment depending on its initial activity in the soil. For offsite, the highest maximum dose is due to 241Am (6.18 mSv y-1), which is more than 22 times the maximum doses from 137Cs and 252Cf. For onsite, the highest maximum doses are due to 241Am (121 mSv y-1), which is more than twice the maximum doses from 137Cs and 252Cf. For offsite and onsite, the dominant pathway for 137Cs is direct radiation from soil, the dominant pathway for 241Am is drinking water followed by plant ingestion, and the dominant pathway for 252Cf is direct radiation from soil. Doses from 137Cs and 252Cf are mainly impacted by the contamination on the surface. For 241Am, the opposite is true. Americium-241 doses are mainly impacted by the contamination below the surface. Based on these findings, the exposure impact for replacing an 241Am neutron source for well logging with 252Cf is assessed.
Identifiants
pubmed: 33675308
doi: 10.1097/HP.0000000000001404
pii: 00004032-202107000-00002
doi:
Substances chimiques
Cesium Radioisotopes
0
Soil Pollutants, Radioactive
0
Cesium-137
4T2E65IAR7
Californium
975X05H15A
Californium-252
9J0Y94YP8Y
Americium-241
SK9YL6NK5M
Americium
VW92PHU2UY
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
7-17Informations de copyright
Copyright © 2021 Health Physics Society.
Déclaration de conflit d'intérêts
The author declares no conflicts of interest.
Références
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