add a check if yellorite ingot is registered to uranium or not

May I ask why? I don't really see the reason to.

because I want to separate the two resources, I do not obtain the yellorite from uranium and vice versa, which allows me to make the big reactor in config, but it is a minor problem

Edit:
the best way would get them back a big reactor ingot instead of creating another

It's the same, but you can remove this piece
.addOreDictName("ingotYellorium").addOreDictName("ingotUranium")
only for clear the code or It's still used

I'll leave it just in case