Which of the following is NOT a piece of equipment that must be maintained in a certified nuclear pharmacy?

In a certified nuclear pharmacy, specific equipment is essential to ensure safety, compliance with regulations, and the effective handling of radioactive materials. A dose calibrator and a portable radiation survey meter are critical components that allow pharmacists to measure and assess the activity of radioactive compounds accurately and safely. These instruments help ensure that doses are precise and that the pharmacy complies with safety standards related to radiation exposure.

An exhaust hood for volatile materials is also relevant for handling certain compounds safely, as it helps ventilate hazardous fumes and keeps the environment safe for pharmacy personnel.

In contrast, a standard retail pharmacy cash register is not specifically required for operations within a certified nuclear pharmacy. While it may be a common feature in many retail settings, it does not pertain to the specialized requirements necessary for handling radiopharmaceuticals or maintaining safety protocols in a nuclear pharmacy setting. Therefore, it is the correct answer, as it is not an item that must be maintained for the pharmacy to function in compliance with applicable nuclear pharmacy regulations.