IEC 61504:2017 supplements IEC 61 559-1 to include radiation monitoring functions important to safety that are not within the scope of IEC 61 559-1 . It applies to centralized systems having a direct role in the achievement or maintenance of radiation protection in nuclear facilities. These systems perform functions such as:
• radiation protection of plant discharge;
• interlock of control functions to prevent or to mitigate accidental release of radioactive material;
• radiation and environmental monitoring functions to support monitoring of and response to accidents;
• provide information to process control or safety systems for use in control or interlock functions.
