The object of this paper is to describe the details of a vessel explosion caused by human error, the incident investigation including engineering analysis of the explosion observations, and the recommended changes that were implemented to avoid a similar incident in the future. Fortunately, this incident did not cause any personal injuries. Stress analysis of the Breech Nut threads was performed to determine if the Breech Nut could be safely used after the incident. Released energy and missile analyses were performed to verify the assumptions made on the source of the explosion.

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