Abstract
Since the extent of an internal contamination by respiration depends on the diameter of the radioactive particles in the atmosphere, a particle size study has been made of the particles present in the air of a working enclosure at the Plutonium Fuel Element Production Section during the preparation of Uranium Plutonium alloy bars. The air of this vessel is drawn through a glass fibre filter on which the dust is deposited. On these filters the radioactive particles are localized first of all by the luminous spots which they produce on a photographic plate when a scintillator is interposed (silver-activated zinc sulphide). An autoradiographic method then makes it possible to distinguish between, and to measure the particles of the oxides of uranium 235, uranium 238 and plutonium 239. On carrying out a microscopic scanning of the relevant parts of the filter, particles are seen surrounded by radial marks the length of which indicates the nature of the grains, and the number of which makes it possible to calculate the theoretical diameter of the radioactive grain. This latter can be compared with the diameter observed with the microscope. Thus for each category of particles it is possible to define a mean diameter
More>>
Bataller, G;
Lenkauer, S
[1]
- Commissariat a l'Energie Atomique, Cadarache (France). Centre d'Etudes Nucleaires
Citation Formats
Bataller, G, and Lenkauer, S.
Granulometric study of plutonium oxide particles in suspension in the atmosphere of a furnace enclosure during the preparation of U-Pu alloys; Etude granulometrique des particules d'oxyde de plutonium en suspension dans l'atmosphere d'une enceinte de fonderie pendant la fabrication d'alliages U-PU.
France: N. p.,
1964.
Web.
Bataller, G, & Lenkauer, S.
Granulometric study of plutonium oxide particles in suspension in the atmosphere of a furnace enclosure during the preparation of U-Pu alloys; Etude granulometrique des particules d'oxyde de plutonium en suspension dans l'atmosphere d'une enceinte de fonderie pendant la fabrication d'alliages U-PU.
France.
Bataller, G, and Lenkauer, S.
1964.
"Granulometric study of plutonium oxide particles in suspension in the atmosphere of a furnace enclosure during the preparation of U-Pu alloys; Etude granulometrique des particules d'oxyde de plutonium en suspension dans l'atmosphere d'une enceinte de fonderie pendant la fabrication d'alliages U-PU."
France.
@misc{etde_20795917,
title = {Granulometric study of plutonium oxide particles in suspension in the atmosphere of a furnace enclosure during the preparation of U-Pu alloys; Etude granulometrique des particules d'oxyde de plutonium en suspension dans l'atmosphere d'une enceinte de fonderie pendant la fabrication d'alliages U-PU}
author = {Bataller, G, and Lenkauer, S}
abstractNote = {Since the extent of an internal contamination by respiration depends on the diameter of the radioactive particles in the atmosphere, a particle size study has been made of the particles present in the air of a working enclosure at the Plutonium Fuel Element Production Section during the preparation of Uranium Plutonium alloy bars. The air of this vessel is drawn through a glass fibre filter on which the dust is deposited. On these filters the radioactive particles are localized first of all by the luminous spots which they produce on a photographic plate when a scintillator is interposed (silver-activated zinc sulphide). An autoradiographic method then makes it possible to distinguish between, and to measure the particles of the oxides of uranium 235, uranium 238 and plutonium 239. On carrying out a microscopic scanning of the relevant parts of the filter, particles are seen surrounded by radial marks the length of which indicates the nature of the grains, and the number of which makes it possible to calculate the theoretical diameter of the radioactive grain. This latter can be compared with the diameter observed with the microscope. Thus for each category of particles it is possible to define a mean diameter and therefore to predict the path of the various inhaled particles in the human body. These results are compared with the very few weakly positive biological samples taken from the personnel working in this enclosure. (authors) [French] L'importance d'une contamination interne par inhalation etant fonction du diametre des particules radioactives en suspension dans l'atmosphere, une etude granulometrique a ete effectuee sur les poussieres existant dans l'air d'une enceinte de travail a la Section de Fabrication des Elements Combustibles au Plutonium pendant une fabrication de barreaux d'alliage Uranium Plutonium, L'air de ce caisson est aspire a travers un filtre en fibre de verre sur lequel restent fixees les poussieres. Sur ces filtres, les particules radioactives sont tout d'abord localisees par les spots lumineux qu'elles produisent sur une plaque photographique lorsqu'on interpose un scintillateur (sulfure de zinc active a l'argent). Une technique autoradiographique permet ensuite de differencier et de mesurer les particules d'oxydes d'uranium 235, d'uranium 238 et de plutonium 239. Un 'scanning' microscopique des portions interessantes des filtres fait apparaitre les particules entourees de traces radiales dont la longueur indique la nature et dont le nombre permet de calculer le diametre theorique du grain radioactif. Celui-ci peut etre compare au diametre observe au microscope. Ainsi pour chaque categorie de particules, on peut definir un diametre moyen et par consequent prevoir l'itineraire dans le corps humain des diverses particules inhalees. Ces resultats sont compares aux quelques rares prelevements biologiques faiblement positifs observes chez le personnel travaillant dans cette enceinte. (auteurs)}
place = {France}
year = {1964}
month = {Jul}
}
title = {Granulometric study of plutonium oxide particles in suspension in the atmosphere of a furnace enclosure during the preparation of U-Pu alloys; Etude granulometrique des particules d'oxyde de plutonium en suspension dans l'atmosphere d'une enceinte de fonderie pendant la fabrication d'alliages U-PU}
author = {Bataller, G, and Lenkauer, S}
abstractNote = {Since the extent of an internal contamination by respiration depends on the diameter of the radioactive particles in the atmosphere, a particle size study has been made of the particles present in the air of a working enclosure at the Plutonium Fuel Element Production Section during the preparation of Uranium Plutonium alloy bars. The air of this vessel is drawn through a glass fibre filter on which the dust is deposited. On these filters the radioactive particles are localized first of all by the luminous spots which they produce on a photographic plate when a scintillator is interposed (silver-activated zinc sulphide). An autoradiographic method then makes it possible to distinguish between, and to measure the particles of the oxides of uranium 235, uranium 238 and plutonium 239. On carrying out a microscopic scanning of the relevant parts of the filter, particles are seen surrounded by radial marks the length of which indicates the nature of the grains, and the number of which makes it possible to calculate the theoretical diameter of the radioactive grain. This latter can be compared with the diameter observed with the microscope. Thus for each category of particles it is possible to define a mean diameter and therefore to predict the path of the various inhaled particles in the human body. These results are compared with the very few weakly positive biological samples taken from the personnel working in this enclosure. (authors) [French] L'importance d'une contamination interne par inhalation etant fonction du diametre des particules radioactives en suspension dans l'atmosphere, une etude granulometrique a ete effectuee sur les poussieres existant dans l'air d'une enceinte de travail a la Section de Fabrication des Elements Combustibles au Plutonium pendant une fabrication de barreaux d'alliage Uranium Plutonium, L'air de ce caisson est aspire a travers un filtre en fibre de verre sur lequel restent fixees les poussieres. Sur ces filtres, les particules radioactives sont tout d'abord localisees par les spots lumineux qu'elles produisent sur une plaque photographique lorsqu'on interpose un scintillateur (sulfure de zinc active a l'argent). Une technique autoradiographique permet ensuite de differencier et de mesurer les particules d'oxydes d'uranium 235, d'uranium 238 et de plutonium 239. Un 'scanning' microscopique des portions interessantes des filtres fait apparaitre les particules entourees de traces radiales dont la longueur indique la nature et dont le nombre permet de calculer le diametre theorique du grain radioactif. Celui-ci peut etre compare au diametre observe au microscope. Ainsi pour chaque categorie de particules, on peut definir un diametre moyen et par consequent prevoir l'itineraire dans le corps humain des diverses particules inhalees. Ces resultats sont compares aux quelques rares prelevements biologiques faiblement positifs observes chez le personnel travaillant dans cette enceinte. (auteurs)}
place = {France}
year = {1964}
month = {Jul}
}