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2025 First Alert LTI#19 Arm injury while closing Radioactive source box
The MWD engineer was verifying the backup Radioactive (RA) source inside the RA source-box which was located approximately 200 meters away from the rig site. After confirming the serial number and while closing the RA source box, the door lock became stuck. The MWD engineer attempted to release the lock while holding the door with the left hand and manipulating the lock with the right hand from the side of the box. Suddenly, the lock released, causing the door to close and strike the MWD engineer on the right arm resulted to fracture.
When a locking mechanism becomes stuck, what specific steps should you follow to ensure safety before attempting to release it? How can we identify early signs that a lock might fail or resist movement? Why is it important not to apply manual force to stuck locks? What alternative tools or methods can we use to avoid exposing our arms during troubleshooting a stuck locks ? How do we effectively reassess the situation when unexpected changes occur? If locking mechanism stuck, stop. Don’t force it
Plan: No formal plan was developed as the activity involved a routine task of checking and verifying the serial number Check Equipment: The RA (Radioactive) source box was received at the rig site in a locked condition, as prepared in the workshop. Prepare area: The source box was positioned approx. 200 meters away from the rig site and secured with barricades and appropriate signage. Energy Control: The box lid was equipped with a steel clip locking mechanism in compliance with standard requirements. Communication: When the locking mechanism became stuck, no communication was initiated to request assistance or inform the shift team. Final check: The locking mechanism was inspected prior to mobilization to the site. Start of Work: While closing the RA source box after verifying the serial number, the sudden release of the jammed lock caused the lid to strike the MWD (Measurement While Drilling) Engineer’s right forearm.
Category:
Incident First Alert
Document Type:
Safety
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