Published October 15, 1982
| Version v1
Patent
Process for manufacturing boron carbide pellets that can be used for the realization, of the control rods of water reactors
Description
The subject of the invention is a process for manufacturing boron carbide pellets with a boron carbide content of not less than 68% by volume and having an open porosity. This process consists in (a) preparing a mix comprising boron carbide powder of which at least 90% of the particles are under 3 μ in size, and an organic binder that can be transformed into carbon by thermal treatment, (b) compressing the hot mix thus obtained to form unbaked pellets, under a pressure of 1000 to 6000 bars, at a temperature of 80 to 2500C and (c) submitting the unbaked pellets thus obtained to vacuum thermal treatment to transform this binder into porous carbon. The finished pellets are used in the control rods of water reactors
Availability note (English)
Available from Institut National de la Propriete Industrielle, Paris (France).Abstract (French)
L'invention a pour objet un procede de fabrication de pastilles en carbure de bore ayant une teneur en carbure de bore d'au moins 68% en volume et presentant une porosite ouverte. Ce procede consiste: a preparer un melange comprenant de la poudre de carbure de bore dont au moins 90% des particules ont une granulometrie inferieure a 3μ, et un liant organique susceptible d'etre transforme en carbone par traitement thermique; a comprimer a chaud le melange ainsi obtenu pour former des pastilles crues, sous une pression de 1000 a 6000 bars, a une temperature de 80 a 2500C, et a soumettre les pastilles crues ainsi obtenues a un traitement thermique sous vide pour transformer ledit liant en carbone poreux. Utilisation des pastilles obtenues dans les barres de commande des reacteurs a eau 3184000Additional details
Additional titles
- Original title (French)
- Procede de fabrication de pastilles en carbure de bore poreux, utilisable pour la realisation de barres de commande pour reacteur nucleaire
Publishing Information
- Imprint Pagination
- 14 p.
- IPC:
- Int. Cl. C04b35/62; G21c7/24.
- IPC
- Int. Cl. C04b35/62; G21c7/24.
- Patent number
- FR patent document 2503695/A/
INIS
- Country of Publication
- France
- Country of Input or Organization
- France
- INIS RN
- 14768851
- Subject category
- S22: GENERAL STUDIES OF NUCLEAR REACTORS; S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
- Resource subtype / Literary indicator
- Non-conventional Literature
- Descriptors DEI
- BORON CARBIDES; CONTROL ELEMENTS; FABRICATION; MODERATOR PELLETS; NEUTRON ABSORBERS; WATER COOLED REACTORS
- Descriptors DEC
- BORON COMPOUNDS; CARBIDES; CARBON COMPOUNDS; REACTOR COMPONENTS; REACTORS