Breeder reactors research was quite huge (one of the first breeder was built in the US in 1951). To this day there is no such reactor working industrially sati

Breeder reactors research was quite huge (one of the first breeder was built in the US in 1951). To this day there is no such reactor working industrially satisfactorily. This architecture has been, for all practical purposes, abandoned by nearly all countries that were researching and developing it. See https://en.wikipedia.org/wiki/Breeder_reactor#Future_plants https://en.wikipedia.org/wiki/Breeder_reactor#Future_plants One of the most (if not the most) ambitious project was Superphénix, costed billions and failed flat. https://en.wikipedia.org/wiki/Superph%C3%A9nix https://en.wikipedia.org/wiki/Superph%C3%A9nix The most successful was Russia's BN-800 but "problems ((...)) indicated a redesign was needed", and construction of it's successor (the BN-1200) was put on indefinite hold. Problems related to cost and process/security seem quite difficult(?) https://en.wikipedia.org/wiki/BN-1200_reactor https://en.wikipedia.org/wiki/BN-1200_reactor Russians are back to the drawing board. The sole officially actively pursued (since 2021) pertinent design, BREST-OD-300 ( https://en.wikipedia.org/wiki/BREST_(reactor) https://en.wikipedia.org/wiki/BREST_(reactor) ) will only (when completed, if ever) be a demonstrator (low power). French ahead: https://fr.wikipedia.org/wiki/Surg%C3%A9n%C3%A9ration https://fr.wikipedia.org/wiki/Surg%C3%A9n%C3%A9ration