If you want, you can view science as a system of organization. A way of making sense of facts. If I give you a file of seemingly random ones and zeroes, it is useless. If I give you an algorithm to decode those ones and zeroes into a message, that has utility. However, somebody else could produce an algorithm to decode those same ones and zeroes into an entirely different message. So, which algorithm is correct? Neither.
But say I give you another file, and Algorithm B doesn’t produce anything useful for this message, so now Algorithm A is more useful. But I also provide a new Algorithm C which also finds messages in both files. Now which is more correct, A or C? And on and on. We continue to refine our models of the data, and we hope that those models will have predictive utility until proven otherwise, but it is always possible (in fact, almost guaranteed) that there is a model of the universe that is more accurate than the one we have.
Consider the utility of a map. A map is an obviously useful thing, but it is also incomplete. A perfect map, a “true” map, would perfectly reproduce every single minute detail of the thing it is mapping. But to do so, it would need to be built at the same scale as the thing it is mapping, which would be far too cumbersome to actually use as, you know, a map. So, we abstract details to identify patterns to maximize utility. Science, likewise, is a tool of prediction, which is useful, but is also not true, because our model of the universe can never be complete.
Supposedly, a meltdown at sea is pretty low risk because you have the perfect heatsink literally everywhere around you, and its a molten salt design, which I think(?) (source: my ass) means that the fuel would at worst leak into the sea and immediately solidify back into some inert state.