This part deals with the dose assessment of workers and the arrangements between the dosimetry services and the employer. The CEGB runs its own dosime­try services from each of the nuclear licensed sites. Where further more-specialised techniques are required (for example, whole body counting) outside agencies are employed.

This part deals also with the health monitoring of radiation workers, and requires that medical records are kept.

Part 5: Arrangements for the Control of Radioactive Substances

This part deals with how the radioactive material is used, accounted for, and transported. It further deals with the prevention of radioactive material from entering the body of a person, and requires that wash­ing facilities and personal protective equipment are provided.