IEC 60965:2009 establishes requirements for the supplementary control points provided to enable the operating staff of nuclear power plants to shut down the reactor and maintain the plant in a safe shut-down state in the event that control of the safety functions can no longer be exercised from the main control room, due to unavailability of the main control room or its facilities. The main technical changes with regard to the previous edition are as follows:
- to clarify the definitions and review the requirements;
- to update the references to new IEC standards published since the first issue;
- to align the standard with new editions of the relevant IAEA documents.