Answer: The given statement is False.
Repositories for the radioactive waste disposal are the the burial facilities, which are excavated in higher depth ( approximately 1000 feet below) having stable geologic environmental conditions.
They are used for burying radioactive waste so as to avoid the exposure of human population and environment with radioactive material ( which could be hazardous to lives as well as environment) present in the waste.
They could be built in any area that is geologically suitable for burying waste. This means that they have no relation with the size of population in that area.
Thus, the given statement is False.