A grenade fails to detonate after being used, what type of incident is this?

A grenade that fails to detonate after being used is classified as a malfunction. This term specifically refers to a situation where a device does not perform as intended during its operational use. In the context of explosives and ordnance, a malfunction indicates that the device, which should have detonated upon activation, did not function properly. This classification is critical for safety management as it necessitates specific protocols for handling and mitigating risks associated with unexploded ordnance.

Understanding this classification helps personnel identify the nature of the issue, allowing for a focused response that may include ensuring the area is secure and notifying the appropriate authorities for safe disposal. In contrast, the other choices represent different scenarios or actions that do not specifically capture the essence of a grenade failing to detonate.