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New instruments and methods for measuring the concentration of radioactive products in the atmosphere; Appareils recents et methodes nouvelles pour la mesure de la concentration des produits radioactifs dans l'atmosphere

Abstract

Different recorders for radioactive aerosols have been developed for measuring the pollution of the atmosphere in laboratories or the external atmosphere. EAR 600. - Allows continuous measurement, instantaneously and 3 to 10 hours after sampling, of concentrations of {alpha} or {beta} emitting aerosols varying between some 10{sup -11} and some 10{sup -8} curie per cubic metre of air. EAR 800. - Allows continuous measurement of concentration of {alpha} emitting aerosols varying between 10{sup -11} and 10{sup -5} curie per cubic metre of air and concentration of {beta} emitting aerosols from 10{sup -11} to 10{sup -1} curie per cubic metre of air. EAR Plutonium. - Allows detection after several minutes of 1000 MPD (2 x 10{sup -9} curie par cubic metre), and after 8 hours 1 MPD (2 x 10{sup -12} curie per cubic metre). Two methods are used to separate the activity due to plutonium from that due to the descendants of radon and thoron: a) by amplitude discrimination, b) by RaC-RaC' and ThC-ThC' ({alpha} {beta} ) coincidences. SP4. This system, mounted on a jeep, allows the measurement of irradiation produced on the ground by the smoke from the piles. The sensitivity is 5{mu}R/h. A.D.I.R. - This autonomous and portable  More>>
Authors:
Jehanno, C; Blanc, A; Lallemant, C; Roux, G [1] 
  1. Commissariat a l'Energie Atomique, Saclay (France). Centre d'Etudes Nucleaires
Publication Date:
Jul 01, 1959
Product Type:
Technical Report
Report Number:
CEA-R-1157
Resource Relation:
Other Information: 11 refs
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; AEROSOL MONITORING; AIR FILTERS; ALPHA DETECTION; BETA DETECTION; COINCIDENCE METHODS; EMANOMETERS; FALLOUT; GAMMA DETECTION; GEIGER-MUELLER COUNTERS; INDOOR AIR CONTAMINATION; NATURAL RADIOACTIVITY; PHOTOMULTIPLIERS; PLUTONIUM; PULSE INTEGRATORS; RADIATION MONITORING; RADIOACTIVE AEROSOLS; RADON; SCINTILLATION COUNTERS; SENSITIVITY; SURFACE CONTAMINATION MONITORS
OSTI ID:
20912789
Research Organizations:
CEA Saclay, 91 - Gif-sur-Yvette (France)
Country of Origin:
France
Language:
French
Other Identifying Numbers:
TRN: FR07R1157073965
Availability:
Available from INIS in electronic form
Submitting Site:
FRN
Size:
61 pages
Announcement Date:
Sep 22, 2007

Citation Formats

Jehanno, C, Blanc, A, Lallemant, C, and Roux, G. New instruments and methods for measuring the concentration of radioactive products in the atmosphere; Appareils recents et methodes nouvelles pour la mesure de la concentration des produits radioactifs dans l'atmosphere. France: N. p., 1959. Web.
Jehanno, C, Blanc, A, Lallemant, C, & Roux, G. New instruments and methods for measuring the concentration of radioactive products in the atmosphere; Appareils recents et methodes nouvelles pour la mesure de la concentration des produits radioactifs dans l'atmosphere. France.
Jehanno, C, Blanc, A, Lallemant, C, and Roux, G. 1959. "New instruments and methods for measuring the concentration of radioactive products in the atmosphere; Appareils recents et methodes nouvelles pour la mesure de la concentration des produits radioactifs dans l'atmosphere." France.
@misc{etde_20912789,
title = {New instruments and methods for measuring the concentration of radioactive products in the atmosphere; Appareils recents et methodes nouvelles pour la mesure de la concentration des produits radioactifs dans l'atmosphere}
author = {Jehanno, C, Blanc, A, Lallemant, C, and Roux, G}
abstractNote = {Different recorders for radioactive aerosols have been developed for measuring the pollution of the atmosphere in laboratories or the external atmosphere. EAR 600. - Allows continuous measurement, instantaneously and 3 to 10 hours after sampling, of concentrations of {alpha} or {beta} emitting aerosols varying between some 10{sup -11} and some 10{sup -8} curie per cubic metre of air. EAR 800. - Allows continuous measurement of concentration of {alpha} emitting aerosols varying between 10{sup -11} and 10{sup -5} curie per cubic metre of air and concentration of {beta} emitting aerosols from 10{sup -11} to 10{sup -1} curie per cubic metre of air. EAR Plutonium. - Allows detection after several minutes of 1000 MPD (2 x 10{sup -9} curie par cubic metre), and after 8 hours 1 MPD (2 x 10{sup -12} curie per cubic metre). Two methods are used to separate the activity due to plutonium from that due to the descendants of radon and thoron: a) by amplitude discrimination, b) by RaC-RaC' and ThC-ThC' ({alpha} {beta} ) coincidences. SP4. This system, mounted on a jeep, allows the measurement of irradiation produced on the ground by the smoke from the piles. The sensitivity is 5{mu}R/h. A.D.I.R. - This autonomous and portable instrument is designed for the instantaneous measurement of the radon content of the atmosphere in mines. It allows the measurement of contents in air varying between 0.4 and 400 x 10{sup -10} curie per litre of air (0.4 and 400 MPD). The measurement of radioactive fall-out is carried out after collection of this activity by a special rain gauge which comprises an adhesive surface and a tube containing ion exchange resins. The radioactivity of the fall-out varies between some 10{sup -9} and some 10{sup -7} curie per square metre per month. Concentrations in fission products of the atmosphere are measured after collecting on filter paper. Concentrations measured in air at ground level vary between 10{sup -13} and 10{sup -12} curie per cubic metre. (author) [French] Differents enregistreurs pour aerosols radioactifs ont ete realises pour mesurer la pollution de l'atmosphere des laboratoires ou l'atmosphere exterieure. EAR 600. - Permet de mesurer en continu instantanement et 3 a 10 heures apres le prelevement des concentrations d'aerosols emetteurs {alpha} ou {beta} allant de quelques 10{sup -11} a quelques 10{sup -8} curies par metre cube d'air. EAR 800. - Permet de mesurer en continu des concentrations d'aerosols emetteurs {alpha} allant de 10{sup -11} a 10{sup -5} curie par metre cube d'air, et des concentrations d'aerosols emetteurs {beta} allant de 10{sup -11} a 10{sup -1} curie par metre cube d'air. EAR PLUTONIUM. - Permet de detecter en quelques minutes 1000 DMP (2.10{sup -9} curie par metre cube) et en 8 heures 1 DMP (2.10{sup -12} curie par metre cube). Deux methodes sont utilisees pour separer l'activite due au plutonium de celle due aux derives du radon et du thoron: a) par discrimination d'amplitude, b) par les coincidences (a,b) RaC' et ThC-ThC'. SP 4. - Monte sur jeep, cet ensemble permet la mesure de l'irradiation produite au sol par le panache des piles. La sensibilite est de 5{mu}R/h. A.D.I.R. - Cet appareil autonome et portatif est destine a la mesure instantanee des teneurs en radon de l'atmosphere des mines. Il permet de mesurer des teneurs de l'air variant entre 0,4 et 400.10{sup -10} curie par litre d'air (0,4 et 400 DPM). La mesure des retombees radioactives est faite apres collection de cette activite par un pluviometre special comportant une surface adhesive et une cartouche de resines echangeuses d'ions. La radioactivite des retombees varie entre quelques 10{sup -9} et quelques 10{sup -7} curie par metre carre et par mois. La mesure des concentrations de l'atmosphere en produits de fission est faite apres collection sur papier filtre. Les concentrations mesurees dans l'air au niveau du sol varient entre 10{sup -13} et 10{sup -12} curie par metre cube. (auteur)}
place = {France}
year = {1959}
month = {Jul}
}