RSU INF-18: Classified Radiation Workers: Designation and Arrangements Summary: Guidance on designating classified radiation workers under IRR17, including dose thresholds, medical checks, dosimetry, radiation passbooks, and arrangements for non-classified workers to ensure compliance, safety, and record-keeping requirements. Type: Procedure Category: Health, Safety and Security of staff and visitors Owner: Radiation Safety Unit   This document requires CAS authentication Contact email: radiation@manchester.ac.uk Last modified: 27/11/2025 Link to this document: https://documents.manchester.ac.uk/display.aspx?DocID=78069 Edit (only Administrators)