Film and ring badges measure your exposure to radiation from outside the body. The badges do not protect you from radiation but only measure the amount of radiation you are exposed to.
Persons only using H-3, C-14, S-35 are not required to wear film or ring badges.
The reason for having a film and ring badge is so we can measure what you whole body receives (the film badge) and what you hands receive (the ring badge.)
The NRC has set limit for exposure to radiation. Your whole body is allowed to receive 5 rem/year. Your hands and feet are allowed to receive 50 rems/year.
Here at UVM we want to keep all exposures below 10 % of the NRC limits.
Film and ring badges must be exchanged each month so that they can be sent to a commercial company for evaluation.
You will be sent a exposure report if you received a measurable exposure that month. All film and ring badged workers receive an annual report of their radiation exposure.