needs lockwire, or a cotter pin. Why do I have a feeling the wheels of trolly cart are better secured then radioactive material?
they should also put a flange on it, so its not tiny. IDK What they were thinking. A square flange would prevent it from rolling. And it should be placed so that if a bolt falls out, it would need to over come gravity. Why is it capable of falling out?
I guess messing with the shape makes it easier to breach or misuse/pry/force. But seriously, cotter pin, lock wire, gravity. Radioactive materials are a dismal problem. Transport fixture where its upside down during transport.