There's no significant immediate threat to life or well-being. It's simply not an emergency. We're all constantly exposed to some ionizing radiation. It's a question of how much.

In this case, not much. It's still an exposure event and absolutely worth giving medical attention to assess continued exposure levels from ingested contamination and generally be overly cautious. But that doesn't mean it's ultimately going to be a significant factor in this workers risk for radiation induced disease. It's certainly better than living in the vicinity of coal mining and processing plants.