As someone who has done some contracting work in this space, I'd say one of the use cases for this is shipping inspections at ports. Not everything the government considers sensitive is the Jason Bourne black-ops stuff most of the comments here are fantasizing about.
Because it's likely the device your longshoreman foremen and customs inspectors are already using around this inventory. If you can embed radiation detectors in them and send sensor data off to central servers at the same time, why wouldn't you?
Here's a couple overviews:
https://www.energy.gov/nnsa/nnsa-and-nuclear-smuggling-detec...
https://www.epa.gov/radtown/radiation-and-shipping-port-secu...