Published 1968 | Version v1
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Count rate balance method of measuring sediment transport of sand beds by radioactive tracers

Creators

  • 1. Commissariat a l'Energie Atomique, 91 - Saclay (France). Centre d'Etudes Nucleaires

Description

Radioactive tracers are applied to the direct measurement of the sediment transport rate of sand beds. The theoretical measurement formula is derived: the variation of the count rate balance is inverse of that of the transport thickness. Simultaneously the representativeness of the tracer is critically studied. The minimum quantity of tracer which has to be injected in order to obtain a correct statistical definition of count rate given by a low number of grains 'seen' by the detector is then studied. A field experiment was made and has let to study the technological conditions for applying this method: only the treatment of results is new, the experiment itself is carried out with conventional techniques applied with great care. (author)

Availability note (English)

Available from INIS in electronic form

Abstract (French)

Les indicateurs radioactifs sont appliques a la mesure directe du debit de charriage des lits sableux. On etablit la formule theorique de mesure: le bilan des taux de comptage varie en sens inverse de l'epaisseur de charriage. Parallelement on fait une etude critique de la representativite de l'indicateur, puis on determine la quantite minimale de traceur qu'il faut immerger pour que les taux de comptage fournis pour un faible nombre de grains 'vus' par le detecteur aient une definition statistique correcte. Une experience de terrain a permis d'etudier les conditions technologiques de cette methode: seul le depouillement des resultats est nouveau. L'experimentation in-situ se fait suivant les procedes classiques avec un tres grand soin. (auteur)

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Additional details

Additional titles

Original title (French)
Methode du bilan des taux de comptage d'indicateurs radioactifs pour la determination du debit de charriage des lits sableux

Publishing Information

Imprint Pagination
[162 p.]
Report number
CEA-R--3431

INIS

Country of Publication
France
Country of Input or Organization
France
INIS RN
35091307
Subject category
S54: ENVIRONMENTAL SCIENCES;
Resource subtype / Literary indicator
Thesis
Descriptors DEI
CALIBRATION; CESIUM 137; CHROMIUM 51; COUNTING RATES; FLOW RATE; GOLD 198; IRIDIUM 192; PARTICLE SIZE; PARTICULATES; PHOTOMULTIPLIERS; PROBABILISTIC ESTIMATION; RIVERS; SAND; SCINTILLATION COUNTERS; SEDIMENTATION; TANTALUM 182; TRACER TECHNIQUES
Descriptors DEC
BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; CALCULATION METHODS; CESIUM ISOTOPES; CHROMIUM ISOTOPES; DAYS LIVING RADIOISOTOPES; ELECTRON CAPTURE RADIOISOTOPES; EVEN-ODD NUCLEI; GOLD ISOTOPES; HEAVY NUCLEI; INTERMEDIATE MASS NUCLEI; INTERNAL CONVERSION RADIOISOTOPES; IRIDIUM ISOTOPES; ISOMERIC TRANSITION ISOTOPES; ISOTOPE APPLICATIONS; ISOTOPES; MEASURING INSTRUMENTS; MILLISECONDS LIVING RADIOISOTOPES; MINUTES LIVING RADIOISOTOPES; NUCLEI; ODD-EVEN NUCLEI; ODD-ODD NUCLEI; PARTICLES; PHOTOTUBES; RADIATION DETECTORS; RADIOISOTOPES; SIZE; SURFACE WATERS; TANTALUM ISOTOPES; YEARS LIVING RADIOISOTOPES

Optional Information

Notes
27 refs.