This publication addresses the critical need for accurate and standardized methods of individual monitoring for radionuclide intakes among workers in environments where radioactive materials are handled. It presents the International Commission on Radiological Protection's (ICRP) recommendations and guidance on the principles and practices for monitoring workers who may have absorbed radioactive substances. The document details the technical aspects, calibration, and interpretation of monitoring results, aiming to ensure effective radiation protection programs.

This ICRP publication serves as a foundational technical document for professionals involved in radiation protection and occupational health in industries utilizing radioactive materials. Its recommendations are critical for establishing consistent and reliable monitoring programs, ensuring worker safety, and complying with regulatory standards. The detailed guidance provided is essential for the accurate assessment of internal radiation exposure, forming a key reference for health physicists and safety officers.