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On the use of a dedicated ballast pellet for a prompt self-ejection mechanism after a temperature transient in lead-cooled fast reactors

Autor
Arias, F.J.
Tipus d'activitat
Article en revista
Revista
Nuclear engineering and design
Data de publicació
2017-10
Volum
322
Pàgina inicial
485
Pàgina final
491
DOI
https://doi.org/10.1016/j.nucengdes.2017.07.023 Obrir en finestra nova
Repositori
http://hdl.handle.net/2117/107743 Obrir en finestra nova
URL
http://www.sciencedirect.com/science/article/pii/S0029549317303552 Obrir en finestra nova
Resum
The potential use of changes in buoyancy as a reactivity feedback mechanism during temperature transients in heavy liquid metal fast reactors (HLMFRs) is discussed. It is shown that with the use of ballast pellets (~15% volume fraction) introduced in combination with fuel pellets, fuel rods will be endowed with a reliable self-ejection mechanism that is able to compensate temperature transients. Utilizing a simplified model, an estimate of the negative reactivity insertion expected from this mec...
Paraules clau
Heavy Liquid Metal Fast Reactors, Buoyancy, Temperature Transient Compensation, Generation Iv Reactors

Participants