For activities authorized to perform open facility X-ray, how often must NDI technicians participate in at least one open x-ray inspection?

The correct answer is based on the requirement that NDI (Non-Destructive Inspection) technicians must actively engage in practical experience to maintain their proficiency in open facility X-ray inspections. This is crucial because regular participation helps technicians stay current with techniques, technology, and safety protocols associated with X-ray inspections.

Engaging in at least one open X-ray inspection every three months ensures that the technicians are keeping their skills sharp and retaining competence in performing these critical inspections. The established timeframe is designed to strike a balance, ensuring technicians maintain a sufficient level of exposure to the task without it becoming overly burdensome.

This three-month interval allows for a proper routine, reinforcing the technicians' familiarity with procedures and minimizing the risk of skills atrophy due to infrequent practice. Other options may suggest intervals that are either too short or too long, which could compromise the effectiveness of the technicians' skills and ultimately impact the quality of inspections performed.