isn't the equipment to produce weapon-grade fissile materiel kinda different from those used in power production? So the time "time to slap together an atom bom

isn't the equipment to produce weapon-grade fissile materiel kinda different from those used in power production? So the time "time to slap together an atom bomb" would still be quite long. Also when talking talking about nuclear's price vs LNG, another factor to take into consideration is energy dependence on foreign suppliers