Über die Verwendung von Borverbindungen in gasgekühlten Hochtemperaturreaktoren 1: Bestimmung des thermischen Verhaltens von Bor in Graphit mit Hilfe der Emissionsspektroskopie
Über die Verwendung von Borverbindungen in gasgekühlten Hochtemperaturreaktoren 1: Bestimmung des thermischen Verhaltens von Bor in Graphit mit Hilfe der Emissionsspektroskopie
In high-temperature gas-cooled reactor technology the use of graphite elements containing boron compounds as absorber materials or burnable poisons is given more and more attention. This means that the relevant properties of those compounds such as their stability in a graphite matrix at high temper...
Saved in:
Personal Name(s): | Nickel, Hubertus (Corresponding author) |
---|---|
Contributing Institute: |
Publikationen vor 2000; PRE-2000; Retrocat |
Imprint: |
Jülich
Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag
1967
|
Physical Description: |
18 p. |
Document Type: |
Report Book |
Research Program: |
Addenda |
Series Title: |
Berichte der Kernforschungsanlage Jülich
477 |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
In high-temperature gas-cooled reactor technology the use of graphite elements containing boron compounds as absorber materials or burnable poisons is given more and more attention. This means that the relevant properties of those compounds such as their stability in a graphite matrix at high temperature have tobe known. The present part of this work deals with the thermal behaviour of boron and boron carbide in graphite when heated in a d.c. arc between graphite electrodes. lt has been shown by emission spectroscopy that in boron containing graphite electrodes the boron migrates always towards the hottest spot. The rate of this migration depends on the nature of the boron compound as well as on the degree of graphitisation and the density of the graphite matrix. On the basis of the results a possible diffusion mechanism is proposed. A second communication will deal with the compatibility of boron containing coated particles, borides and boronated graphite with graphite. |