What term describes an accidental or unauthorized detonation that does not risk escalating into war?

The term that describes an accidental or unauthorized detonation that does not risk escalating into war is "Broken Arrow." This term is specifically used in military contexts to indicate a situation involving nuclear weapons that do not pose a threat of nuclear war but still represent a significant risk due to the accidental release or loss of such weapons.

In essence, "Broken Arrow" encompasses incidents where nuclear weapons are involved in accidents or unauthorized events without leading to broader hostilities between nuclear powers. This distinguishes it from other terms that might imply a greater risk of conflict or destruction, emphasizing that while serious, the incident does not escalate to the level of warfare.