Believe it or not, the safety analyses on military nuclear reactors include combat damage.
Your statement on safety analysis practices is either supposition of fabrication.
Failure analysis for pipe ruptures in nuclear systems is not done assuming the pipe slowly blows out, it's done assuming the pipe instantaneously ceases to exist.
What I am proposing is that sophisticated sabotage would be detected before it can be exploited, not that it cannot be carried out.
This is such crap, you might as well publish an article stating that an internal safety study concluded a bomber pilot with a nuclear weapon on board could crash his plane. The way you mitigate such failures is through personnel measures. Anyone who works in job where such measures are in place understands what I am talking about. This is why you do background investigations, psychological tests, and financial monitoring.