IEC 62241 : 1.0

NUCLEAR POWER PLANTS - MAIN CONTROL ROOM - ALARM FUNCTIONS AND PRESENTATION

International Electrotechnical Committee

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FOREWORD INTRODUCTION 1 Scope and object 2 Normative references 3 Terms and definitions 4 Background explanations    4.1 Problems of alarm systems    4.2 Functional design elements    4.3 Other elements 5 Basic functional requirements    5.1 Alarm functions    5.2 Alarm signals    5.3 Alarm signal processing    5.4 Alarm display processing    5.5 Alarm control and management    5.6 Alarm presentation and display-control integration    5.7 Human factors    5.8 Evaluation 6 Design definition of alarms    6.1 General    6.2 Key alarms    6.3 Alarms needed 7 Alarm signal processing    7.1 General    7.2 Alarm signal validation    7.3 Alarm generation and reduction processing    7.4 Event sequence and time delay processing    7.5 First-out processing 8 Alarm display processing    8.1 General    8.2 Grouped alarms    8.3 Alarm suppression    8.4 Dark-board presentation 9 Alarm control and management    9.1 General    9.2 Audible warning and silence    9.3 Flash and reflash    9.4 Acknowledgement    9.5 Ringback    9.6 Reset 10 Alarm presentation and display-control integration    10.1 General    10.2 Alarm fascia and tile    10.3 VDU alarm list display    10.4 Audible annunciation 11 Reliability, testing, and maintainability    11.1 Reliability    11.2 Testing    11.3 Maintainability 12 Alarm recording 13 Alarm response procedures (ARP)    13.1 General    13.2 Contents    13.3 Format Annex A (informative) Problems of alarm system Annex B (informative) Information sources for signals used         to generate alarms Annex C (informative) Examples of alarm processing logic and         dynamic prioritisation Annex D (informative) Conceptual example of alarm grouping         and categorisation Annex E (informative) Material for the need of distinction         between alarm and status information Annex F (informative) Example of arrangement of alarm tiles Annex G (informative) Examples of Points to Consider in the        Categorisation of Alarms

Abstract

Specifies the functional requirements for the alarm systems in the main control room of nuclear power plants. It provides definitions of the terms used for alarm functions and also establishes the human factors requirements and the design guidelines for alarm presentation for the main control room of nuclear power plants.