A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
PROCEDE DE FABRICATION D'UNE PASTILLE D'AU MOINS UN OXYDE METALLIQUE
The present invention relates to a process for sintering a compacted powder of at least one oxide of a metal selected from an actinide and a lanthanide, this process comprising the following successive steps, carried out in a furnace and under an atmosphere comprising an inert gas, dihydrogen and water: (a) a temperature increase from an initial temperature Ti up to a hold temperature TP, (b) maintaining the temperature at the hold temperature TP, and (c) a temperature decrease from the hold temperature TP down to a final temperature TF, in which the P(H2)/P(H2O) ratio is such that: - 500 < P(H2)/P(H2O) ≤ 50 000, during step (a), from Ti until a first intermediate temperature Ti1 between 1000°C and TP is reached, and - P(H2)/P(H2O)≤ 500, at least during step (c), from a second intermediate temperature Ti2 between TP and 1000°C, until TF is reached. The invention also relates to a process for manufacturing a pellet of at least one oxide of a metal selected from an actinide and a lanthanide, especially a nuclear fuel pellet.
PROCEDE DE FABRICATION D'UNE PASTILLE D'AU MOINS UN OXYDE METALLIQUE
The present invention relates to a process for sintering a compacted powder of at least one oxide of a metal selected from an actinide and a lanthanide, this process comprising the following successive steps, carried out in a furnace and under an atmosphere comprising an inert gas, dihydrogen and water: (a) a temperature increase from an initial temperature Ti up to a hold temperature TP, (b) maintaining the temperature at the hold temperature TP, and (c) a temperature decrease from the hold temperature TP down to a final temperature TF, in which the P(H2)/P(H2O) ratio is such that: - 500 < P(H2)/P(H2O) ≤ 50 000, during step (a), from Ti until a first intermediate temperature Ti1 between 1000°C and TP is reached, and - P(H2)/P(H2O)≤ 500, at least during step (c), from a second intermediate temperature Ti2 between TP and 1000°C, until TF is reached. The invention also relates to a process for manufacturing a pellet of at least one oxide of a metal selected from an actinide and a lanthanide, especially a nuclear fuel pellet.
PROCEDE DE FABRICATION D'UNE PASTILLE D'AU MOINS UN OXYDE METALLIQUE
PROCESS FOR MANUFACTURING A PELLET OF AT LEAST ONE METAL OXIDE
VERFAHREN ZUR HERSTELLUNG EINES PELLETS AUS MINDESTENS EINEM METALLOXID
VAUDEZ STÉPHANE (author)
2018-10-24
Patent
Electronic Resource
French
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