Godzilla tanked Castle Bravo. It doesn't look like Carol can hit harder than a 15 megaton nuclear explosion (and she'd need to in order to plausibly...
As an important follow up to that feat and to provide context (because I can predict the future and know what people are gonna say), NO, nukes do not...
Are we extrapolating 54's limits based on what his Showa cousin (the 55 and onwards Godzilla) could do? Or sticking strictly to what we saw in the 54...