Final answer:
A "declared pregnant" female radiation worker should inform her employer in writing, providing certain criteria such as a positive HCG blood test, estimated due date of delivery, and estimated date of conception to support her claim.
Step-by-step explanation:
According to the U.S. Equal Employment Opportunity Commission (EEOC), a "declared pregnant" female radiation worker should inform her employer voluntarily, in writing, and provide certain criteria to support her claim. These criteria include a positive human chorionic gonadotropin (HCG) blood test, estimated due date of delivery, and estimated date of conception. By following these guidelines, the employee ensures that her employer is aware of her pregnancy and can make necessary accommodations to protect her and the developing fetus from radiation exposure.