They weren't given any protective gear, so what use is a badge saying you've been over exposed if it's guaranteed everyone will eventually hit the limit? The p

They weren't given any protective gear, so what use is a badge saying you've been over exposed if it's guaranteed everyone will eventually hit the limit? The point of the badge is to make sure that people don't get more than the limit of exposure, to keep the workers safe. I know tour guides in Mammoth Caves in Kentucky work this way - the caves are generally safe, but if you spend many many hours in them you will get more than the radiation limit. It just isn't a job you can work for 40 hours a week your whole life. They also don't wear protective gear. There isn't really effective protective gear that you can wear to protect against a constant low level of background radiation. They make lead aprons for x-ray workers but those are impractical for constant wear and don't protect from every direction anyway.