The invention of a "fission blanket" (aka "weak force intermodulation projector") that renders fission impossible, at a distance, is also part of the backstory

The invention of a "fission blanket" (aka "weak force intermodulation projector") that renders fission impossible, at a distance, is also part of the backstory for a scifi novel 'Emprise', by Michael P. Kube-McDowell.