 ::Lovely. I can see the exact wording was used, although in the context of the source, the author was explaining the dismissal of nuclear. For the sake of its inclusion in the nuclear safety article, how would you feel about reversing the order of the two clauses, such that the relevant information is presented but not immediately negated, e.g. 'Although there is no way to guarantee that any reactor will be designed, built and operated correctly [or perhaps 'safely'], the nuclear power industry has improved the safety and performance of reactors, and has proposed safer (but generally untested) reactor designs.' Perhaps that last parenthetical phrase might be refined as well; obviously testing is done in research environments, but what the sentence is trying to say (which is clearer in the report's context) is that the designs haven't been commercially deployed, correct? A similarly succinct way of making that clear here would be good.   