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Some physical methods for study of irradiation effects in graphite; Quelques procedes physiques pour etudier les effets de l'irradiation du graphite

Abstract

A calibration method for a classical apparatus for differential thermal analysis is described in detail. This method achieves a relative precision of 5 per cent in the measurement of the internal energy release accompanying the annealing of irradiated graphites. Elastic constants of graphites are obtained from the frequencies of the longitudinal modes of vibration; procedures for excitation and detection of these vibrations at any temperature between -190 deg. C and +1500 deg. C are described. A procedure for obtaining easily measured deformations of graphites after relatively little irradiation with thermal neutrons is discussed. An application of this method to the study of the thermal annealing of elongation caused by displaced atoms is indicated. (author) [French] On decrit en detail une methode d'etalonnage pour un appareil classique d'analyse thermique differentielle. Cette methode permet de mesurer avec une precision relative de 5% la liberation d'energie interne qui accompagne le 'recuit' des graphites irradies. On deduit les constantes elastiques des graphites des frequences des vibrations longitudinales et on decrit les procedes pour exciter et detecter ces vibrations a toutes les temperatures comprises entre -190 deg. C et + 1500 deg. C. On discute un procede pour obtenir une des deformations de graphites facilement  More>>
Authors:
Mayer, G; Lecomte, M; Mattmuller, R [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-1122
Resource Relation:
Conference: French-American conference on graphite reactors, Upton (United States), 12-15 Nov 1957; Other Information: 1 refs
Subject:
36 MATERIALS SCIENCE; ACCURACY; ANNEALING; ATOMIC DISPLACEMENTS; BORON 10 REACTIONS; BULK DENSITY; CALIBRATION; COMBUSTION HEAT; DIFFERENTIAL THERMAL ANALYSIS; ELASTICITY; ELONGATION; GRAPHITE; LITHIUM 6 REACTIONS; POISSON RATIO; POST-IRRADIATION EXAMINATION; SPECIFIC HEAT; THERMAL NEUTRONS; YOUNG MODULUS
OSTI ID:
20912781
Research Organizations:
CEA Saclay, 91 - Gif-sur-Yvette (France)
Country of Origin:
France
Language:
English; French
Other Identifying Numbers:
TRN: FR07R1122073957
Availability:
Available from INIS in electronic form
Submitting Site:
FRN
Size:
7 pages
Announcement Date:
Sep 24, 2007

Citation Formats

Mayer, G, Lecomte, M, and Mattmuller, R. Some physical methods for study of irradiation effects in graphite; Quelques procedes physiques pour etudier les effets de l'irradiation du graphite. France: N. p., 1959. Web.
Mayer, G, Lecomte, M, & Mattmuller, R. Some physical methods for study of irradiation effects in graphite; Quelques procedes physiques pour etudier les effets de l'irradiation du graphite. France.
Mayer, G, Lecomte, M, and Mattmuller, R. 1959. "Some physical methods for study of irradiation effects in graphite; Quelques procedes physiques pour etudier les effets de l'irradiation du graphite." France.
@misc{etde_20912781,
title = {Some physical methods for study of irradiation effects in graphite; Quelques procedes physiques pour etudier les effets de l'irradiation du graphite}
author = {Mayer, G, Lecomte, M, and Mattmuller, R}
abstractNote = {A calibration method for a classical apparatus for differential thermal analysis is described in detail. This method achieves a relative precision of 5 per cent in the measurement of the internal energy release accompanying the annealing of irradiated graphites. Elastic constants of graphites are obtained from the frequencies of the longitudinal modes of vibration; procedures for excitation and detection of these vibrations at any temperature between -190 deg. C and +1500 deg. C are described. A procedure for obtaining easily measured deformations of graphites after relatively little irradiation with thermal neutrons is discussed. An application of this method to the study of the thermal annealing of elongation caused by displaced atoms is indicated. (author) [French] On decrit en detail une methode d'etalonnage pour un appareil classique d'analyse thermique differentielle. Cette methode permet de mesurer avec une precision relative de 5% la liberation d'energie interne qui accompagne le 'recuit' des graphites irradies. On deduit les constantes elastiques des graphites des frequences des vibrations longitudinales et on decrit les procedes pour exciter et detecter ces vibrations a toutes les temperatures comprises entre -190 deg. C et + 1500 deg. C. On discute un procede pour obtenir une des deformations de graphites facilement mesurables apres une irradiation relativement faible a l'aide de neutrons thermiques. Une application de cette methode a l'etude du 'recuit' thermique de l'elongation causee par les atomes deplaces est indiquee. (auteur)}
place = {France}
year = {1959}
month = {Jul}
}