The concept of a "purge" as portrayed in movies, where societal rules are temporarily lifted to allow for violence and chaos, is fictional and not related to real-world events. A "nuclear apocalypse" refers to a scenario in which nuclear weapons are used on a large scale, leading to devastating consequences including massive destruction, radiation fallout, and long-term environmental impacts.
In reality, the occurrence of a nuclear apocalypse would likely have catastrophic effects on global civilization, leading to loss of life, widespread suffering, and long-lasting repercussions. However, the idea of a "purge" in a nuclear context is more of a speculative concept often found in dystopian fiction rather than a plausible scenario.
It is important to engage in discussions about nuclear weapons with a focus on prevention, disarmament, and peaceful conflict resolution to avoid any such catastrophic outcomes.