Hello!

A world of my is consistently crashing with the following report (https://pastebin.com/TjnGAJVK). I've tried disabling radiation to no avail so any help would be greatly appreciated!

Thanks!

Unfortunately, this looks like a nasty world NBT corruption which can occasionally occur when loading/saving Mincecraft worlds. If you do not have a backup of the world, then it might be possible with some tool like MCEdit or NBTExplorer to go through the world files and remove the troublesome NBT entry for nuclearcraft:capability_radiation_source.