Which document provides consolidated guidance about materials licenses for radioactive materials?

The correct answer is NUREG-1556, which serves as a comprehensive guide for materials licenses involving radioactive materials. This document is published by the U.S. Nuclear Regulatory Commission (NRC) and provides essential guidance on the licensing process, regulatory frameworks, and the necessary requirements for various types of radioactive material licenses.

NUREG-1556 consolidates and clarifies information that applicants and licensees need to understand in order to comply with regulatory requirements effectively. It covers a variety of aspects, including safety measures, recordkeeping, and inspection protocols, making it a vital resource for both new and existing licensees.

Other options, while relevant to radiation protection and regulatory requirements, do not specifically address the consolidated guidance on materials licenses. For example, 10 CFR 20 outlines standards for radiation protection, 10 CFR 49 focuses on specific agreements and reciprocal agreements, and 10 CFR 35 pertains to the medical use of byproduct materials. They each have their place in the regulatory framework but do not serve the same purpose as NUREG-1556 concerning the licensing of radioactive materials.